1 | import generate from "babel-generator";
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2 |
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3 | type Node = {
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4 | type: string;
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5 | };
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6 |
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7 | type Literal = {
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8 | type: 'StringLiteral' | 'BooleanLiteral' | 'NumericLiteral' | 'NullLiteral' | 'RegExpLiteral'
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9 | };
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10 |
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11 | type Identifier = {
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12 | type: string;
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13 | name: string;
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14 | };
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15 |
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16 | type QualifiedTypeIdentifier = {
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17 | id: Identifier;
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18 | qualification: Identifier|QualifiedTypeIdentifier;
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19 | };
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20 |
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21 | type TypeAnnotation = {
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22 | type: string;
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23 | };
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24 |
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25 | interface StringLiteralTypeAnnotation extends TypeAnnotation {
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26 | type: 'StringLiteralTypeAnnotation';
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27 | }
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28 |
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29 | interface NumericLiteralTypeAnnotation extends TypeAnnotation {
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30 | type: 'NumericLiteralTypeAnnotation';
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31 | }
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32 |
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33 | interface BooleanLiteralTypeAnnotation extends TypeAnnotation {
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34 | type: 'BooleanLiteralTypeAnnotation';
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35 | }
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36 |
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37 | type Scope = {};
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38 |
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39 | type NodePath = {
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40 | type: string;
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41 | node: Node;
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42 | scope: Scope;
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43 | };
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44 |
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45 |
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46 |
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47 |
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48 | export default function ({types: t, template}): Object {
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49 |
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50 | |
51 |
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52 |
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53 | const BOOLEAN_BINARY_OPERATORS: string[] = [
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54 | '==',
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55 | '===',
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56 | '>=',
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57 | '<=',
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58 | '>',
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59 | '<',
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60 | 'instanceof'
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61 | ];
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62 |
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63 | const checks: Object = createChecks();
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64 | const staticChecks: Object = createStaticChecks();
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65 |
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66 | const checkIsArray: (() => Node) = expression(`Array.isArray(input)`);
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67 | const checkIsMap: (() => Node) = expression(`input instanceof Map`);
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68 | const checkIsSet: (() => Node) = expression(`input instanceof Set`);
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69 | const checkIsClass: (() => Node) = expression(`typeof input === 'function' && input.prototype && input.prototype.constructor === input`);
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70 | const checkIsGenerator: (() => Node) = expression(`typeof input === 'function' && input.generator`);
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71 | const checkIsIterable: (() => Node) = expression(`input && typeof input[Symbol.iterator] === 'function'`);
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72 | const checkIsObject: (() => Node) = expression(`input != null && typeof input === 'object'`);
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73 | const checkNotNull: (() => Node) = expression(`input != null`);
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74 | const checkEquals: (() => Node) = expression(`input === expected`);
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75 |
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76 | const declareTypeChecker: (() => Node) = template(`
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77 | const id = function id (input) {
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78 | return check;
|
79 | };
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80 | `);
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81 |
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82 | const guard: (() => Node) = template(`
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83 | if (!check) {
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84 | throw new TypeError(message);
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85 | }
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86 | `);
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87 |
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88 | const thrower: (() => Node) = template(`
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89 | if (check) {
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90 | ret;
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91 | }
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92 | else {
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93 | throw new TypeError(message);
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94 | }
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95 | `);
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96 |
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97 | const guardInline: (() => Node) = expression(`
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98 | (id => {
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99 | if (!check) {
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100 | throw new TypeError(message);
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101 | }
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102 | return id;
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103 | })(input)
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104 | `);
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105 |
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106 | const guardFn: (() => Node) = expression(`
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107 | function name (id) {
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108 | if (!check) {
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109 | throw new TypeError(message);
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110 | }
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111 | return id;
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112 | }
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113 | `);
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114 |
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115 | const readableName: (() => Node) = expression(`
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116 | input === null ? 'null' : typeof input === 'object' && input.constructor ? input.constructor.name || '[Unknown Object]' : typeof input
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117 | `);
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118 |
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119 | const checkMapKeys: (() => Node) = expression(`
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120 | input instanceof Map && Array.from(input.keys()).every(key => keyCheck)
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121 | `);
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122 |
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123 | const checkMapValues: (() => Node) = expression(`
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124 | input instanceof Map && Array.from(input.values()).every(value => valueCheck)
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125 | `);
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126 |
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127 | const checkMapEntries: (() => Node) = expression(`
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128 | input instanceof Map && Array.from(input).every(([key, value]) => keyCheck && valueCheck)
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129 | `);
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130 |
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131 | const checkSetEntries: (() => Node) = expression(`
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132 | input instanceof Set && Array.from(input).every(value => valueCheck)
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133 | `);
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134 |
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135 | const checkObjectIndexers: (() => Node) = expression(`
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136 | Object.keys(input).every(key => {
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137 | const value = input[key];
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138 | if (~fixedKeys.indexOf(key)) {
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139 | return true;
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140 | }
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141 | else {
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142 | return check;
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143 | }
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144 | });
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145 | `);
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146 |
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147 | const checkObjectIndexersNoFixed: (() => Node) = expression(`
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148 | Object.keys(input).every(key => {
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149 | const value = input[key];
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150 | return check;
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151 | });
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152 | `);
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153 |
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154 | const PRAGMA_IGNORE_STATEMENT = /typecheck:\s*ignore\s+statement/i;
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155 | const PRAGMA_IGNORE_FILE = /typecheck:\s*ignore\s+file/i;
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156 |
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157 | const visitors = {
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158 | Statement (path: NodePath): void {
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159 | maybeSkip(path);
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160 | },
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161 | TypeAlias (path: NodePath): void {
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162 | if (maybeSkip(path)) {
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163 | return;
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164 | }
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165 | path.replaceWith(createTypeAliasChecks(path));
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166 | },
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167 |
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168 | InterfaceDeclaration (path: NodePath): void {
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169 | if (maybeSkip(path)) {
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170 | return;
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171 | }
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172 | path.replaceWith(createInterfaceChecks(path));
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173 | },
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174 |
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175 | ExportNamedDeclaration (path: NodePath): void {
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176 | if (maybeSkip(path)) {
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177 | return;
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178 | }
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179 | const {node, scope} = path;
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180 | if (node.declaration && node.declaration.type === 'TypeAlias') {
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181 | path.replaceWith(t.exportNamedDeclaration(
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182 | createTypeAliasChecks(path.get('declaration')),
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183 | [],
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184 | null
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185 | ));
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186 | }
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187 | },
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188 |
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189 | ImportDeclaration (path: NodePath): void {
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190 | if (maybeSkip(path)) {
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191 | return;
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192 | }
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193 | if (path.node.importKind !== 'type') {
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194 | return;
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195 | }
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196 | const [declarators, specifiers] = path.get('specifiers')
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197 | .map(specifier => {
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198 | const local = specifier.get('local');
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199 | const tmpId = path.scope.generateUidIdentifierBasedOnNode(local.node);
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200 | const replacement = t.importSpecifier(tmpId, specifier.node.imported);
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201 | const id = t.identifier(local.node.name);
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202 |
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203 | id.isTypeChecker = true;
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204 | const declarator = t.variableDeclarator(id, tmpId);
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205 | declarator.isTypeChecker = true;
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206 | return [declarator, replacement];
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207 | })
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208 | .reduce(([declarators, specifiers], [declarator, specifier]) => {
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209 | declarators.push(declarator);
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210 | specifiers.push(specifier);
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211 | return [declarators, specifiers];
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212 | }, [[], []]);
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213 |
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214 | const declaration = t.variableDeclaration('var', declarators);
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215 | declaration.isTypeChecker = true;
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216 |
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217 | path.replaceWithMultiple([
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218 | t.importDeclaration(specifiers, path.node.source),
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219 | declaration
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220 | ]);
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221 | },
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222 |
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223 | Function: {
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224 | enter (path: NodePath): void {
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225 | if (maybeSkip(path)) {
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226 | return;
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227 | }
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228 |
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229 | const {node, scope} = path;
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230 | const paramChecks = collectParamChecks(path);
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231 | if (node.type === "ArrowFunctionExpression" && node.expression) {
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232 | node.expression = false;
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233 | node.body = t.blockStatement([t.returnStatement(node.body)]);
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234 | }
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235 | if (node.returnType) {
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236 | createFunctionReturnGuard(path);
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237 | createFunctionYieldGuards(path);
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238 | }
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239 | node.body.body.unshift(...paramChecks);
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240 | node.savedTypeAnnotation = node.returnType;
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241 | node.returnCount = 0;
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242 | node.yieldCount = 0;
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243 | },
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244 | exit (path: NodePath): void {
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245 | const {node, scope} = path;
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246 | const isVoid = node.savedTypeAnnotation ? maybeNullableAnnotation(node.savedTypeAnnotation) : null;
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247 | if (!node.returnCount && isVoid === false) {
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248 | let annotation = node.savedTypeAnnotation;
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249 | if (annotation.type === 'TypeAnnotation') {
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250 | annotation = annotation.typeAnnotation;
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251 | }
|
252 | if (node.generator && isGeneratorAnnotation(annotation) && annotation.typeParameters && annotation.typeParameters.params.length > 1) {
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253 | annotation = annotation.typeParameters.params[1];
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254 | }
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255 | throw path.buildCodeFrameError(`Function ${node.id ? `"${node.id.name}" ` : ''}did not return a value, expected ${humanReadableType(annotation)}`);
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256 | }
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257 | if (node.nextGuardCount) {
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258 | path.get('body').get('body')[0].insertBefore(node.nextGuard);
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259 | }
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260 | if (node.yieldGuardCount) {
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261 | path.get('body').get('body')[0].insertBefore(node.yieldGuard);
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262 | }
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263 | if (node.returnGuardCount) {
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264 | path.get('body').get('body')[0].insertBefore(node.returnGuard);
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265 | }
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266 | }
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267 | },
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268 |
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269 | YieldExpression (path: NodePath): void {
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270 | const fn = path.getFunctionParent();
|
271 | if (!fn) {
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272 | return;
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273 | }
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274 | fn.node.yieldCount++;
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275 | if (!isGeneratorAnnotation(fn.node.returnType) || maybeSkip(path)) {
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276 | return;
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277 | }
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278 | const {node, parent, scope} = path;
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279 | let annotation = fn.node.returnType;
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280 | if (annotation.type === 'NullableTypeAnnotation' || annotation.type === 'TypeAnnotation') {
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281 | annotation = annotation.typeAnnotation;
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282 | }
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283 | if (!annotation.typeParameters || annotation.typeParameters.params.length === 0) {
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284 | return;
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285 | }
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286 |
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287 | const yieldType = annotation.typeParameters.params[0];
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288 | const nextType = annotation.typeParameters.params[2];
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289 | const ok = staticCheckAnnotation(path.get("argument"), yieldType);
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290 | if (ok === true && !nextType) {
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291 | return;
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292 | }
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293 | else if (ok === false) {
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294 | throw path.buildCodeFrameError(`Function ${fn.node.id ? `"${fn.node.id.name}" ` : ''}yielded an invalid type, expected ${humanReadableType(yieldType)} got ${humanReadableType(getAnnotation(path.get('argument')))}`);
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295 | }
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296 | fn.node.yieldGuardCount++;
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297 | if (fn.node.yieldGuard) {
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298 | const yielder = t.yieldExpression(
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299 | t.callExpression(fn.node.yieldGuardName, [node.argument || t.identifier('undefined')])
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300 | );
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301 | yielder.hasBeenTypeChecked = true;
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302 |
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303 | if (fn.node.nextGuard) {
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304 | fn.node.nextGuardCount++;
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305 | path.replaceWith(t.callExpression(fn.node.nextGuardName, [yielder]));
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306 | }
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307 | else {
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308 | path.replaceWith(yielder);
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309 | }
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310 | }
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311 | else if (fn.node.nextGuard) {
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312 | fn.node.nextGuardCount++;
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313 | path.replaceWith(t.callExpression(fn.node.nextGuardName, [yielder]));
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314 | }
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315 | },
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316 |
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317 |
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318 | ReturnStatement (path: NodePath): void {
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319 | const fn = path.getFunctionParent();
|
320 | if (!fn) {
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321 | return;
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322 | }
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323 | fn.node.returnCount++;
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324 | if (maybeSkip(path)) {
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325 | return;
|
326 | }
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327 | const {node, parent, scope} = path;
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328 | const {returnType, returnGuardName} = fn.node;
|
329 | if (!returnType || !returnGuardName) {
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330 | return;
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331 | }
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332 | if (!node.argument) {
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333 | if (maybeNullableAnnotation(returnType) === false) {
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334 | throw path.buildCodeFrameError(`Function ${fn.node.id ? `"${fn.node.id.name}" ` : ''}did not return a value, expected ${humanReadableType(returnType)}`);
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335 | }
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336 | return;
|
337 | }
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338 | let annotation = returnType;
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339 | if (annotation.type === 'TypeAnnotation') {
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340 | annotation = annotation.typeAnnotation;
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341 | }
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342 | if (isGeneratorAnnotation(annotation)) {
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343 | annotation = annotation.typeParameters && annotation.typeParameters.params.length > 1 ? annotation.typeParameters.params[1] : t.anyTypeAnnotation();
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344 | }
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345 | const ok = staticCheckAnnotation(path.get("argument"), annotation);
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346 | if (ok === true) {
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347 | return;
|
348 | }
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349 | else if (ok === false) {
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350 | throw path.buildCodeFrameError(`Function ${fn.node.id ? `"${fn.node.id.name}" ` : ''}returned an invalid type, expected ${humanReadableType(annotation)} got ${humanReadableType(getAnnotation(path.get('argument')))}`);
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351 | }
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352 | fn.node.returnGuardCount++;
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353 | const returner = t.returnStatement(t.callExpression(fn.node.returnGuardName, [node.argument]));
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354 | returner.hasBeenTypeChecked = true;
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355 | path.replaceWith(returner);
|
356 | },
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357 |
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358 | VariableDeclaration (path: NodePath): void {
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359 | if (maybeSkip(path)) {
|
360 | return;
|
361 | }
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362 | const {node, scope} = path;
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363 | const collected = [];
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364 | const declarations = path.get("declarations");
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365 | for (let i = 0; i < node.declarations.length; i++) {
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366 | const declaration = node.declarations[i];
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367 | const {id, init} = declaration;
|
368 | if (!id.typeAnnotation || id.hasBeenTypeChecked) {
|
369 | continue;
|
370 | }
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371 | id.savedTypeAnnotation = id.typeAnnotation;
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372 | id.hasBeenTypeChecked = true;
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373 | const ok = staticCheckAnnotation(declarations[i], id.typeAnnotation);
|
374 | if (ok === true) {
|
375 | continue;
|
376 | }
|
377 | else if (ok === false) {
|
378 | throw path.buildCodeFrameError(`Invalid assignment value, expected ${humanReadableType(id.typeAnnotation)} got ${humanReadableType(getAnnotation(declarations[i]))}`);
|
379 | }
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380 | const check = checkAnnotation(id, id.typeAnnotation, scope);
|
381 | if (check) {
|
382 | collected.push(guard({
|
383 | check,
|
384 | message: varTypeErrorMessage(id, scope)
|
385 | }));
|
386 | }
|
387 | }
|
388 | if (collected.length > 0) {
|
389 | const check = collected.reduce((check, branch) => {
|
390 | branch.alternate = check;
|
391 | return branch;
|
392 | });
|
393 | if (path.parent.type === 'Program' || path.parent.type === 'BlockStatement') {
|
394 | path.insertAfter(check);
|
395 | }
|
396 | else if (path.parentPath.isForXStatement() || path.parentPath.isForStatement() || path.parentPath.isForInStatement()) {
|
397 | let body = path.parentPath.get('body');
|
398 | if (body.type !== 'BlockStatement') {
|
399 | const block = t.blockStatement([body.node]);
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400 | body.replaceWith(block);
|
401 | body = path.parentPath.get('body');
|
402 | }
|
403 | const children = body.get('body');
|
404 | if (children.length === 0) {
|
405 | body.replaceWith(check);
|
406 | }
|
407 | else {
|
408 | children[0].insertBefore(check);
|
409 | }
|
410 |
|
411 | }
|
412 | else if (path.parent.type === 'ExportNamedDeclaration' || path.parent.type === 'ExportDefaultDeclaration' || path.parent.type === 'ExportAllDeclaration') {
|
413 | path.parentPath.insertAfter(check);
|
414 | }
|
415 | else {
|
416 | path.replaceWith(t.blockStatement([node, check]));
|
417 | }
|
418 | }
|
419 | },
|
420 |
|
421 | AssignmentExpression (path: NodePath): void {
|
422 | if (maybeSkip(path)) {
|
423 | return;
|
424 | }
|
425 | const {node, scope} = path;
|
426 | const left = path.get('left');
|
427 | let annotation;
|
428 | if (node.hasBeenTypeChecked || node.left.hasBeenTypeChecked) {
|
429 | return;
|
430 | }
|
431 | else if (left.isMemberExpression()) {
|
432 | annotation = getAnnotation(left);
|
433 | }
|
434 | else if (t.isIdentifier(node.left)) {
|
435 | const binding = scope.getBinding(node.left.name);
|
436 | if (!binding) {
|
437 | return;
|
438 | }
|
439 | else if (binding.path.type !== 'VariableDeclarator') {
|
440 | return;
|
441 | }
|
442 | annotation = left.getTypeAnnotation();
|
443 | if (annotation.type === 'AnyTypeAnnotation') {
|
444 | const item = binding.path.get('id');
|
445 | annotation = item.node.savedTypeAnnotation || item.getTypeAnnotation();
|
446 | }
|
447 | }
|
448 | else {
|
449 | return;
|
450 | }
|
451 |
|
452 | node.hasBeenTypeChecked = true;
|
453 | node.left.hasBeenTypeChecked = true;
|
454 | const id = node.left;
|
455 | const right = path.get('right');
|
456 | if (annotation.type === 'AnyTypeAnnotation') {
|
457 | return;
|
458 | }
|
459 | const ok = staticCheckAnnotation(right, annotation);
|
460 | if (ok === true) {
|
461 | return;
|
462 | }
|
463 | else if (ok === false) {
|
464 | throw path.buildCodeFrameError(`Invalid assignment value, expected ${humanReadableType(annotation)} got ${humanReadableType(getAnnotation(right))}`);
|
465 | }
|
466 | const check = checkAnnotation(id, annotation, scope);
|
467 | if (!id.typeAnnotation) {
|
468 | id.typeAnnotation = annotation;
|
469 | }
|
470 | id.hasBeenTypeChecked = true;
|
471 | if (check) {
|
472 | const parent = path.getStatementParent();
|
473 | parent.insertAfter(guard({
|
474 | check,
|
475 | message: varTypeErrorMessage(id, scope)
|
476 | }));
|
477 | }
|
478 | },
|
479 |
|
480 | TypeCastExpression (path: NodePath): void {
|
481 | const {node} = path;
|
482 | let target;
|
483 | switch (node.expression.type) {
|
484 | case 'Identifier':
|
485 | target = node.expression;
|
486 | break;
|
487 | case 'AssignmentExpression':
|
488 | target = node.expression.left;
|
489 | break;
|
490 | default:
|
491 |
|
492 | return;
|
493 | }
|
494 | const id = path.scope.getBindingIdentifier(target.name);
|
495 | if (!id) {
|
496 | return;
|
497 | }
|
498 | id.savedTypeAnnotation = path.getTypeAnnotation();
|
499 | },
|
500 |
|
501 | ForOfStatement (path: NodePath): void {
|
502 | if (maybeSkip(path)) {
|
503 | return;
|
504 | }
|
505 | const left: NodePath = path.get('left');
|
506 | const right: NodePath = path.get('right');
|
507 | const rightAnnotation: TypeAnnotation = getAnnotation(right);
|
508 | const leftAnnotation: TypeAnnotation = left.isVariableDeclaration() ? getAnnotation(left.get('declarations')[0].get('id')) : getAnnotation(left);
|
509 | if (rightAnnotation.type !== 'VoidTypeAnnotation') {
|
510 | const ok: ?boolean = maybeIterableAnnotation(rightAnnotation);
|
511 | if (ok === false) {
|
512 | throw path.buildCodeFrameError(`Cannot iterate ${humanReadableType(rightAnnotation)}`);
|
513 | }
|
514 | }
|
515 | let id: ?Identifier;
|
516 | if (right.isIdentifier()) {
|
517 | id = right.node;
|
518 | }
|
519 | else {
|
520 | id = path.scope.generateUidIdentifierBasedOnNode(right.node);
|
521 | path.scope.push({id});
|
522 | const replacement: Node = t.expressionStatement(t.assignmentExpression('=', id, right.node));
|
523 | path.insertBefore(replacement);
|
524 | right.replaceWith(id);
|
525 | }
|
526 | path.insertBefore(guard({
|
527 | check: checks.iterable({input: id}),
|
528 | message: t.binaryExpression(
|
529 | '+',
|
530 | t.stringLiteral(`Expected ${generate(right.node).code} to be iterable, got `),
|
531 | readableName({input: id})
|
532 | )
|
533 | }));
|
534 |
|
535 | if (rightAnnotation.type !== 'GenericTypeAnnotation' || rightAnnotation.id.name !== 'Iterable' || !rightAnnotation.typeParameters || !rightAnnotation.typeParameters.params.length) {
|
536 | return;
|
537 | }
|
538 |
|
539 | const annotation: TypeAnnotation = rightAnnotation.typeParameters.params[0];
|
540 | if (compareAnnotations(annotation, leftAnnotation) === false) {
|
541 | throw path.buildCodeFrameError(`Invalid iterator type, expected ${humanReadableType(annotation)} got ${humanReadableType(leftAnnotation)}`);
|
542 | }
|
543 | }
|
544 | };
|
545 |
|
546 |
|
547 | return {
|
548 | visitor: {
|
549 | Program (path: NodePath, {opts}) {
|
550 | if (opts && opts.disable && opts.disable[process.env.NODE_ENV]) {
|
551 | return;
|
552 | }
|
553 | for (let child of path.get('body')) {
|
554 | if (maybeSkipFile(child)) {
|
555 | return;
|
556 | }
|
557 | }
|
558 | path.traverse(visitors);
|
559 | }
|
560 | }
|
561 | }
|
562 |
|
563 | |
564 |
|
565 |
|
566 | function createFunctionReturnGuard (path: NodePath): void {
|
567 | const {node, scope} = path;
|
568 | let annotation = node.returnType;
|
569 | if (annotation.type === 'TypeAnnotation') {
|
570 | annotation = annotation.typeAnnotation;
|
571 | }
|
572 | if (isGeneratorAnnotation(annotation)) {
|
573 | annotation = annotation.typeParameters && annotation.typeParameters.params.length > 1 ? annotation.typeParameters.params[1] : t.anyTypeAnnotation();
|
574 | }
|
575 | const name = scope.generateUidIdentifierBasedOnNode(node);
|
576 | const id = scope.generateUidIdentifier('id');
|
577 | const check = checkAnnotation(id, annotation, scope);
|
578 | if (check) {
|
579 | node.returnGuard = guardFn({
|
580 | id,
|
581 | name,
|
582 | check,
|
583 | message: returnTypeErrorMessage(path, path.node, id)
|
584 | });
|
585 | node.returnGuard.hasBeenTypeChecked = true;
|
586 | node.returnGuardName = name;
|
587 | node.returnGuardCount = 0;
|
588 | }
|
589 | }
|
590 |
|
591 | function createFunctionYieldGuards (path: NodePath) {
|
592 | const {node, scope} = path;
|
593 | let annotation = node.returnType;
|
594 | if (annotation.type === 'NullableTypeAnnotation' || annotation.type === 'TypeAnnotation') {
|
595 | annotation = annotation.typeAnnotation;
|
596 | }
|
597 | if (!annotation.typeParameters || annotation.typeParameters.params.length === 0) {
|
598 | return;
|
599 | }
|
600 | if (annotation.type === 'TypeAnnotation') {
|
601 | annotation = annotation.typeAnnotation;
|
602 | }
|
603 | if (!isGeneratorAnnotation(annotation)) {
|
604 | return;
|
605 | }
|
606 |
|
607 | const yieldType = annotation.typeParameters.params[0];
|
608 | const nextType = annotation.typeParameters.params[2];
|
609 |
|
610 | if (yieldType) {
|
611 | const name = scope.generateUidIdentifier(`check${node.id ? node.id.name.slice(0, 1).toUpperCase() + node.id.name.slice(1) : ''}Yield`);
|
612 | const id = scope.generateUidIdentifier('id');
|
613 | const check = checkAnnotation(id, yieldType, scope);
|
614 | if (check) {
|
615 | node.yieldGuard = guardFn({
|
616 | id,
|
617 | name,
|
618 | check,
|
619 | message: yieldTypeErrorMessage(node, yieldType, id)
|
620 | });
|
621 | node.yieldGuardName = name;
|
622 | node.yieldGuardCount = 0;
|
623 | }
|
624 | }
|
625 |
|
626 |
|
627 | if (nextType) {
|
628 | const name = scope.generateUidIdentifier(`check${node.id ? node.id.name.slice(0, 1).toUpperCase() + node.id.name.slice(1) : ''}Next`);
|
629 | const id = scope.generateUidIdentifier('id');
|
630 | const check = checkAnnotation(id, nextType, scope);
|
631 | if (check) {
|
632 | node.nextGuard = guardFn({
|
633 | id,
|
634 | name,
|
635 | check,
|
636 | message: yieldNextTypeErrorMessage(node, nextType, id)
|
637 | });
|
638 | node.nextGuardName = name;
|
639 | node.nextGuardCount = 0;
|
640 | }
|
641 | }
|
642 | }
|
643 |
|
644 | function isThisMemberExpression (path: NodePath): boolean {
|
645 | const {node} = path;
|
646 | if (node.type === 'ThisExpression') {
|
647 | return true;
|
648 | }
|
649 | else if (node.type === 'MemberExpression') {
|
650 | return isThisMemberExpression(path.get('object'));
|
651 | }
|
652 | else {
|
653 | return false;
|
654 | }
|
655 | }
|
656 |
|
657 | function isGeneratorAnnotation (annotation: ?TypeAnnotation): boolean {
|
658 | if (!annotation) {
|
659 | return false;
|
660 | }
|
661 | if (annotation.type === 'TypeAnnotation' || annotation.type === 'NullableTypeAnnotation') {
|
662 | annotation = annotation.typeAnnotation;
|
663 | }
|
664 | return annotation.type === 'GenericTypeAnnotation' && annotation.id.name === 'Generator';
|
665 | }
|
666 |
|
667 | function createChecks (): Object {
|
668 | return {
|
669 | number: expression(`typeof input === 'number'`),
|
670 | numericLiteral: checkNumericLiteral,
|
671 | boolean: expression(`typeof input === 'boolean'`),
|
672 | booleanLiteral: checkBooleanLiteral,
|
673 | class: checkClass,
|
674 | function: expression(`typeof input === 'function'`),
|
675 | string: expression(`typeof input === 'string'`),
|
676 | stringLiteral: checkStringLiteral,
|
677 | symbol: expression(`typeof input === 'symbol'`),
|
678 | undefined: expression(`input === undefined`),
|
679 | null: expression(`input === null`),
|
680 | void: expression(`input == null`),
|
681 | instanceof: expression(`input instanceof type`),
|
682 | type: expression(`type(input)`),
|
683 | mixed: () => null,
|
684 | any: () => null,
|
685 | union: checkUnion,
|
686 | intersection: checkIntersection,
|
687 | array: checkArray,
|
688 | map: checkMap,
|
689 | set: checkSet,
|
690 | generator: checkGenerator,
|
691 | iterable: checkIterable,
|
692 | tuple: checkTuple,
|
693 | object: checkObject,
|
694 | nullable: checkNullable,
|
695 | typeof: checkTypeof,
|
696 | int8: expression(`typeof input === 'number' && !isNaN(input) && input >= -128 && input <= 127 && input === Math.floor(input)`),
|
697 | uint8: expression(`typeof input === 'number' && !isNaN(input) && input >= 0 && input <= 255 && input === Math.floor(input)`),
|
698 | int16: expression(`typeof input === 'number' && !isNaN(input) && input >= -32768 && input <= 32767 && input === Math.floor(input)`),
|
699 | uint16: expression(`typeof input === 'number' && !isNaN(input) && input >= 0 && input <= 65535 && input === Math.floor(input)`),
|
700 | int32: expression(`typeof input === 'number' && !isNaN(input) && input >= -2147483648 && input <= 2147483647 && input === Math.floor(input)`),
|
701 | uint32: expression(`typeof input === 'number' && !isNaN(input) && input >= 0 && input <= 4294967295 && input === Math.floor(input)`),
|
702 | float32: expression(`typeof input === 'number' && !isNaN(input) && input >= -3.40282347e+38 && input <= 3.40282347e+38`),
|
703 | float64: expression(`typeof input === 'number' && !isNaN(input)`)
|
704 |
|
705 | };
|
706 | }
|
707 |
|
708 | function createStaticChecks (): Object {
|
709 | return {
|
710 | symbol (path: NodePath): ?boolean {
|
711 | return maybeSymbolAnnotation(getAnnotation(path));
|
712 | },
|
713 | instanceof ({path, annotation}): ?boolean {
|
714 | const type = createTypeExpression(annotation.id);
|
715 |
|
716 | const {node, scope} = path;
|
717 | if (type.name === 'Object' && node.type === 'ObjectExpression' && !scope.hasBinding('Object')) {
|
718 | return true;
|
719 | }
|
720 | else if (type.name === 'Map' && !scope.hasBinding('Map')) {
|
721 | return null;
|
722 | }
|
723 | else if (type.name === 'Set' && !scope.hasBinding('Set')) {
|
724 | return null;
|
725 | }
|
726 | else if (type.name === 'Class' && !scope.hasBinding('Class')) {
|
727 | return null;
|
728 | }
|
729 | else if (type.name === 'int8' && !scope.hasBinding('int8')) {
|
730 | return null;
|
731 | }
|
732 | else if (type.name === 'uint8' && !scope.hasBinding('uint8')) {
|
733 | return null;
|
734 | }
|
735 | else if (type.name === 'int16' && !scope.hasBinding('int16')) {
|
736 | return null;
|
737 | }
|
738 | else if (type.name === 'uint16' && !scope.hasBinding('uint16')) {
|
739 | return null;
|
740 | }
|
741 | else if (type.name === 'int32' && !scope.hasBinding('int32')) {
|
742 | return null;
|
743 | }
|
744 | else if (type.name === 'uint32' && !scope.hasBinding('uint32')) {
|
745 | return null;
|
746 | }
|
747 | else if (type.name === 'float32' && !scope.hasBinding('float32')) {
|
748 | return null;
|
749 | }
|
750 | else if (type.name === 'float64' && !scope.hasBinding('float64')) {
|
751 | return null;
|
752 | }
|
753 | return maybeInstanceOfAnnotation(getAnnotation(path), type, annotation.typeParameters ? annotation.typeParameters.params : []);
|
754 | },
|
755 | type ({path, type}): ?boolean {
|
756 | return null;
|
757 | },
|
758 | };
|
759 | }
|
760 |
|
761 | function compareAnnotations (a: TypeAnnotation, b: TypeAnnotation): ?boolean {
|
762 | if (a.type === 'TypeAnnotation') {
|
763 | a = a.typeAnnotation;
|
764 | }
|
765 | if (b.type === 'TypeAnnotation') {
|
766 | b = b.typeAnnotation;
|
767 | }
|
768 | switch (a.type) {
|
769 | case 'StringTypeAnnotation':
|
770 | return maybeStringAnnotation(b);
|
771 | case 'StringLiteralTypeAnnotation':
|
772 | return compareStringLiteralAnnotations(a, b);
|
773 | case 'NumberTypeAnnotation':
|
774 | return maybeNumberAnnotation(b);
|
775 | case 'NumericLiteralTypeAnnotation':
|
776 | return compareNumericLiteralAnnotations(a, b);
|
777 | case 'BooleanTypeAnnotation':
|
778 | return maybeBooleanAnnotation(b);
|
779 | case 'BooleanLiteralTypeAnnotation':
|
780 | return compareBooleanLiteralAnnotations(a, b);
|
781 | case 'FunctionTypeAnnotation':
|
782 | return maybeFunctionAnnotation(b);
|
783 | case 'AnyTypeAnnotation':
|
784 | return null;
|
785 | case 'MixedTypeAnnotation':
|
786 | return null;
|
787 | case 'ObjectTypeAnnotation':
|
788 | return compareObjectAnnotation(a, b);
|
789 | case 'ArrayTypeAnnotation':
|
790 | return compareArrayAnnotation(a, b);
|
791 | case 'GenericTypeAnnotation':
|
792 | return compareGenericAnnotation(a, b);
|
793 | case 'TupleTypeAnnotation':
|
794 | return compareTupleAnnotation(a, b);
|
795 | case 'UnionTypeAnnotation':
|
796 | return compareUnionAnnotation(a, b);
|
797 | case 'IntersectionTypeAnnotation':
|
798 | return compareIntersectionAnnotation(a, b);
|
799 | case 'NullableTypeAnnotation':
|
800 | return compareNullableAnnotation(a, b);
|
801 | default:
|
802 | return null;
|
803 | }
|
804 | }
|
805 |
|
806 | function compareStringLiteralAnnotations (a: StringLiteralTypeAnnotation, b: TypeAnnotation): ?boolean {
|
807 | if (b.type === 'StringLiteralTypeAnnotation') {
|
808 | return a.value === b.value;
|
809 | }
|
810 | else {
|
811 | return maybeStringAnnotation(b) === false ? false : null;
|
812 | }
|
813 | }
|
814 |
|
815 | function compareBooleanLiteralAnnotations (a: BooleanLiteralTypeAnnotation, b: TypeAnnotation): ?boolean {
|
816 | if (b.type === 'BooleanLiteralTypeAnnotation') {
|
817 | return a.value === b.value;
|
818 | }
|
819 | else {
|
820 | return maybeBooleanAnnotation(b) === false ? false : null;
|
821 | }
|
822 | }
|
823 |
|
824 | function compareNumericLiteralAnnotations (a: NumericLiteralTypeAnnotation, b: TypeAnnotation): ?boolean {
|
825 | if (b.type === 'NumericLiteralTypeAnnotation') {
|
826 | return a.value === b.value;
|
827 | }
|
828 | else {
|
829 | return maybeNumberAnnotation(b) === false ? false : null;
|
830 | }
|
831 | }
|
832 |
|
833 | function unionComparer (a: TypeAnnotation, b: TypeAnnotation, comparator: (a:TypeAnnotation, b:TypeAnnotation) => ?boolean): ?boolean {
|
834 | if (!a.types || a.types.length === 0) {
|
835 | return null;
|
836 | }
|
837 | let falseCount = 0;
|
838 | let trueCount = 0;
|
839 | if (!a.types) {
|
840 | return null;
|
841 | }
|
842 | for (let type of a.types) {
|
843 | const result = comparator(type, b);
|
844 | if (result === true) {
|
845 | if (b.type !== 'UnionTypeAnnotation') {
|
846 | return true;
|
847 | }
|
848 | trueCount++;
|
849 | }
|
850 | else if (result === false) {
|
851 | if (b.type === 'UnionTypeAnnotation') {
|
852 | return false;
|
853 | }
|
854 | falseCount++;
|
855 | }
|
856 | }
|
857 | if (falseCount === a.types.length) {
|
858 | return false;
|
859 | }
|
860 | else if (trueCount === a.types.length) {
|
861 | return true;
|
862 | }
|
863 | else {
|
864 | return null;
|
865 | }
|
866 | }
|
867 |
|
868 | function intersectionComparer (a: TypeAnnotation, b: TypeAnnotation, comparator: (a:TypeAnnotation, b:TypeAnnotation) => ?boolean): ?boolean {
|
869 | let falseCount = 0;
|
870 | let trueCount = 0;
|
871 | if (!a.types) {
|
872 | return null;
|
873 | }
|
874 | for (let type of a.types) {
|
875 | const result = comparator(type, b);
|
876 | if (result === true) {
|
877 | trueCount++;
|
878 | }
|
879 | else if (result === false) {
|
880 | return false;
|
881 | }
|
882 | }
|
883 | if (trueCount === a.types.length) {
|
884 | return true;
|
885 | }
|
886 | else {
|
887 | return null;
|
888 | }
|
889 | }
|
890 |
|
891 | function compareObjectAnnotation (a: Node, b: Node): ?boolean {
|
892 | switch (b.type) {
|
893 | case 'ObjectTypeAnnotation':
|
894 | break;
|
895 | case 'TypeAnnotation':
|
896 | case 'FunctionTypeParam':
|
897 | case 'NullableTypeAnnotation':
|
898 | return compareObjectAnnotation(a, b.typeAnnotation);
|
899 | case 'UnionTypeAnnotation':
|
900 | return unionComparer(a, b, compareObjectAnnotation);
|
901 | case 'IntersectionTypeAnnotation':
|
902 | return intersectionComparer(a, b, compareObjectAnnotation);
|
903 | case 'VoidTypeAnnotation':
|
904 | case 'BooleanTypeAnnotation':
|
905 | case 'BooleanLiteralTypeAnnotation':
|
906 | case 'StringTypeAnnotation':
|
907 | case 'StringLiteralTypeAnnotation':
|
908 | case 'NumberTypeAnnotation':
|
909 | case 'NumericLiteralTypeAnnotation':
|
910 | case 'FunctionTypeAnnotation':
|
911 | return false;
|
912 | default:
|
913 | return null;
|
914 | }
|
915 |
|
916 |
|
917 | let allTrue = true;
|
918 | for (let aprop of a.properties) {
|
919 | let found = false;
|
920 | for (let bprop of b.properties) {
|
921 | if (bprop.key.name === aprop.key.name) {
|
922 | const result = compareAnnotations(aprop.value, bprop.value);
|
923 | if (result === false && !(aprop.optional && (bprop.optional || maybeNullableAnnotation(bprop.value) === true))) {
|
924 | return false;
|
925 | }
|
926 | else {
|
927 | found = result;
|
928 | }
|
929 | break;
|
930 | }
|
931 | }
|
932 | if (found === false && !aprop.optional) {
|
933 | return false;
|
934 | }
|
935 | allTrue = allTrue && found === true;
|
936 | }
|
937 | return allTrue ? true : null;
|
938 | }
|
939 |
|
940 | function compareArrayAnnotation (a: Node, b: Node): ?boolean {
|
941 | switch (b.type) {
|
942 | case 'TypeAnnotation':
|
943 | case 'FunctionTypeParam':
|
944 | case 'NullableTypeAnnotation':
|
945 | return compareArrayAnnotation(a, b.typeAnnotation);
|
946 | case 'UnionTypeAnnotation':
|
947 | return unionComparer(a, b, compareArrayAnnotation);
|
948 | case 'IntersectionTypeAnnotation':
|
949 | return intersectionComparer(a, b, compareArrayAnnotation);
|
950 | case 'VoidTypeAnnotation':
|
951 | case 'BooleanTypeAnnotation':
|
952 | case 'BooleanLiteralTypeAnnotation':
|
953 | case 'StringTypeAnnotation':
|
954 | case 'StringLiteralTypeAnnotation':
|
955 | case 'NumberTypeAnnotation':
|
956 | case 'NumericLiteralTypeAnnotation':
|
957 | case 'FunctionTypeAnnotation':
|
958 | return false;
|
959 | default:
|
960 | return null;
|
961 | }
|
962 | }
|
963 |
|
964 | function compareGenericAnnotation (a: Node, b: Node): ?boolean {
|
965 | switch (b.type) {
|
966 | case 'TypeAnnotation':
|
967 | case 'FunctionTypeParam':
|
968 | case 'NullableTypeAnnotation':
|
969 | return compareGenericAnnotation(a, b.typeAnnotation);
|
970 | case 'GenericTypeAnnotation':
|
971 | if (b.id.name === a.id.name) {
|
972 | return true;
|
973 | }
|
974 | else {
|
975 | return null;
|
976 | }
|
977 | case 'UnionTypeAnnotation':
|
978 | return unionComparer(a, b, compareGenericAnnotation);
|
979 | case 'IntersectionTypeAnnotation':
|
980 | return intersectionComparer(a, b, compareGenericAnnotation);
|
981 | default:
|
982 | return null;
|
983 | }
|
984 | }
|
985 |
|
986 | function compareTupleAnnotation (a: Node, b: Node): ?boolean {
|
987 | if (b.type === 'TupleTypeAnnotation') {
|
988 | if (b.types.length === 0) {
|
989 | return null;
|
990 | }
|
991 | else if (b.types.length < a.types.length) {
|
992 | return false;
|
993 | }
|
994 | return a.types.every((type, index) => compareAnnotations(type, b.types[index]));
|
995 | }
|
996 | switch (b.type) {
|
997 | case 'TypeAnnotation':
|
998 | case 'FunctionTypeParam':
|
999 | case 'NullableTypeAnnotation':
|
1000 | return compareTupleAnnotation(a, b.typeAnnotation);
|
1001 | case 'UnionTypeAnnotation':
|
1002 | return unionComparer(a, b, compareTupleAnnotation);
|
1003 | case 'IntersectionTypeAnnotation':
|
1004 | return intersectionComparer(a, b, compareTupleAnnotation);
|
1005 | case 'VoidTypeAnnotation':
|
1006 | case 'BooleanTypeAnnotation':
|
1007 | case 'BooleanLiteralTypeAnnotation':
|
1008 | case 'StringTypeAnnotation':
|
1009 | case 'StringLiteralTypeAnnotation':
|
1010 | case 'NumberTypeAnnotation':
|
1011 | case 'NumericLiteralTypeAnnotation':
|
1012 | case 'FunctionTypeAnnotation':
|
1013 | return false;
|
1014 | default:
|
1015 | return null;
|
1016 | }
|
1017 | }
|
1018 |
|
1019 | function compareUnionAnnotation (a: Node, b: Node): ?boolean {
|
1020 | switch (b.type) {
|
1021 | case 'NullableTypeAnnotation':
|
1022 | return compareUnionAnnotation(a, b.typeAnnotation);
|
1023 | case 'AnyTypeAnnotation':
|
1024 | case 'MixedTypeAnnotation':
|
1025 | return null;
|
1026 | default:
|
1027 | return unionComparer(a, b, compareAnnotations);
|
1028 | }
|
1029 | }
|
1030 |
|
1031 | function compareNullableAnnotation (a: Node, b: Node): ?boolean {
|
1032 | switch (b.type) {
|
1033 | case 'TypeAnnotation':
|
1034 | case 'FunctionTypeParam':
|
1035 | return compareNullableAnnotation(a, b.typeAnnotation);
|
1036 | case 'NullableTypeAnnotation':
|
1037 | case 'VoidTypeAnnotation':
|
1038 | return null;
|
1039 | }
|
1040 | if (compareAnnotations(a.typeAnnotation, b) === true) {
|
1041 | return true;
|
1042 | }
|
1043 | else {
|
1044 | return null;
|
1045 | }
|
1046 | }
|
1047 |
|
1048 | function arrayExpressionToTupleAnnotation (path: NodePath): TypeAnnotation {
|
1049 | const elements = path.get('elements');
|
1050 | return t.tupleTypeAnnotation(elements.map(element => getAnnotation(element)));
|
1051 | }
|
1052 |
|
1053 | function checkNullable ({input, type, scope}): ?Node {
|
1054 | const check = checkAnnotation(input, type, scope);
|
1055 | if (!check) {
|
1056 | return;
|
1057 | }
|
1058 | return t.logicalExpression(
|
1059 | "||",
|
1060 | checks.void({input}),
|
1061 | check
|
1062 | );
|
1063 | }
|
1064 |
|
1065 | function checkTypeof ({input, annotation, scope}): ?Node {
|
1066 | switch (annotation.type) {
|
1067 | case 'GenericTypeAnnotation':
|
1068 | const {id} = annotation;
|
1069 | const path = Object.assign({}, input, {type: id.type, node: id, scope});
|
1070 | return checkAnnotation(input, getAnnotation(path), scope);
|
1071 | default:
|
1072 | return checkAnnotation(input, annotation, scope);
|
1073 | }
|
1074 | }
|
1075 |
|
1076 | function checkStringLiteral ({input, annotation}): ?Node {
|
1077 | return checkEquals({input, expected: t.stringLiteral(annotation.value)});
|
1078 | }
|
1079 |
|
1080 | function checkNumericLiteral ({input, annotation}): ?Node {
|
1081 | return checkEquals({input, expected: t.numericLiteral(annotation.value)});
|
1082 | }
|
1083 |
|
1084 | function checkBooleanLiteral ({input, annotation}): ?Node {
|
1085 | return checkEquals({input, expected: t.booleanLiteral(annotation.value)});
|
1086 | }
|
1087 |
|
1088 | function checkUnion ({input, types, scope}): ?Node {
|
1089 | const checks = types.map(type => checkAnnotation(input, type, scope)).filter(identity);
|
1090 | return checks.reduce((last, check, index) => {
|
1091 | if (last == null) {
|
1092 | return check;
|
1093 | }
|
1094 | return t.logicalExpression(
|
1095 | "||",
|
1096 | last,
|
1097 | check
|
1098 | );
|
1099 | }, null);
|
1100 | }
|
1101 |
|
1102 |
|
1103 | function checkIntersection ({input, types, scope}): ?Node {
|
1104 | const checks = types.map(type => checkAnnotation(input, type, scope)).filter(identity);
|
1105 | return checks.reduce((last, check, index) => {
|
1106 | if (last == null) {
|
1107 | return check;
|
1108 | }
|
1109 | return t.logicalExpression(
|
1110 | "&&",
|
1111 | last,
|
1112 | check
|
1113 | );
|
1114 | }, null);
|
1115 | }
|
1116 |
|
1117 |
|
1118 | function checkMap ({input, types, scope}): Node {
|
1119 | const [keyType, valueType] = types;
|
1120 | const key = t.identifier('key');
|
1121 | const value = t.identifier('value');
|
1122 | const keyCheck = keyType ? checkAnnotation(key, keyType, scope) : null;
|
1123 | const valueCheck = valueType ? checkAnnotation(value, valueType, scope) : null;
|
1124 | if (!keyCheck) {
|
1125 | if (!valueCheck) {
|
1126 | return checkIsMap({input});
|
1127 | }
|
1128 | else {
|
1129 | return checkMapValues({input, value, valueCheck});
|
1130 | }
|
1131 | }
|
1132 | else {
|
1133 | if (!valueCheck) {
|
1134 | return checkMapKeys({input, key, keyCheck});
|
1135 | }
|
1136 | else {
|
1137 | return checkMapEntries({input, key, value, keyCheck, valueCheck});
|
1138 | }
|
1139 | }
|
1140 | }
|
1141 |
|
1142 | function checkSet ({input, types, scope}): Node {
|
1143 | const [valueType] = types;
|
1144 | const value = t.identifier('value');
|
1145 | const valueCheck = valueType ? checkAnnotation(value, valueType, scope) : null;
|
1146 | if (!valueCheck) {
|
1147 | return checkIsSet({input});
|
1148 | }
|
1149 | else {
|
1150 | return checkSetEntries({input, value, valueCheck});
|
1151 | }
|
1152 | }
|
1153 |
|
1154 | function checkGenerator ({input, types, scope}): Node {
|
1155 | return checkIsGenerator({input});
|
1156 | }
|
1157 |
|
1158 | function checkIterable ({input, types, scope}): Node {
|
1159 | return checkIsIterable({input});
|
1160 | }
|
1161 |
|
1162 | function checkClass ({input, types, scope}): Node {
|
1163 | return checkIsClass({input});
|
1164 | }
|
1165 |
|
1166 | function checkArray ({input, types, scope}): Node {
|
1167 | if (!types || types.length === 0) {
|
1168 | return checkIsArray({input});
|
1169 | }
|
1170 | else if (types.length === 1) {
|
1171 | const item = t.identifier('item');
|
1172 | const type = types[0];
|
1173 | const check = checkAnnotation(item, type, scope);
|
1174 | if (!check) {
|
1175 | return checkIsArray({input});
|
1176 | }
|
1177 | return t.logicalExpression(
|
1178 | '&&',
|
1179 | checkIsArray({input}),
|
1180 | t.callExpression(
|
1181 | t.memberExpression(input, t.identifier('every')),
|
1182 | [t.functionExpression(null, [item], t.blockStatement([
|
1183 | t.returnStatement(check)
|
1184 | ]))]
|
1185 | )
|
1186 | );
|
1187 | }
|
1188 | else {
|
1189 |
|
1190 | const checks = types.map(
|
1191 | (type, index) => checkAnnotation(
|
1192 | t.memberExpression(
|
1193 | input,
|
1194 | t.numericLiteral(index),
|
1195 | true
|
1196 | ),
|
1197 | type,
|
1198 | scope
|
1199 | )
|
1200 | ).filter(identity);
|
1201 |
|
1202 | const checkLength = t.binaryExpression(
|
1203 | '>=',
|
1204 | t.memberExpression(
|
1205 | input,
|
1206 | t.identifier('length')
|
1207 | ),
|
1208 | t.numericLiteral(types.length)
|
1209 | );
|
1210 |
|
1211 | return checks.reduce((last, check, index) => {
|
1212 | return t.logicalExpression(
|
1213 | "&&",
|
1214 | last,
|
1215 | check
|
1216 | );
|
1217 | }, t.logicalExpression(
|
1218 | '&&',
|
1219 | checkIsArray({input}),
|
1220 | checkLength
|
1221 | ));
|
1222 | }
|
1223 | }
|
1224 |
|
1225 | function checkTuple ({input, types, scope}): Node {
|
1226 | if (types.length === 0) {
|
1227 | return checkIsArray({input});
|
1228 | }
|
1229 |
|
1230 |
|
1231 | const checks = types.map(
|
1232 | (type, index) => checkAnnotation(
|
1233 | t.memberExpression(
|
1234 | input,
|
1235 | t.numericLiteral(index),
|
1236 | true
|
1237 | ),
|
1238 | type,
|
1239 | scope
|
1240 | )
|
1241 | ).filter(identity);
|
1242 |
|
1243 | const checkLength = t.binaryExpression(
|
1244 | '>=',
|
1245 | t.memberExpression(
|
1246 | input,
|
1247 | t.identifier('length')
|
1248 | ),
|
1249 | t.numericLiteral(types.length)
|
1250 | );
|
1251 |
|
1252 | return checks.reduce((last, check, index) => {
|
1253 | return t.logicalExpression(
|
1254 | "&&",
|
1255 | last,
|
1256 | check
|
1257 | );
|
1258 | }, t.logicalExpression(
|
1259 | '&&',
|
1260 | checkIsArray({input}),
|
1261 | checkLength
|
1262 | ));
|
1263 | }
|
1264 |
|
1265 | function checkObject ({input, properties, indexers, scope}): Node {
|
1266 | if (input.type === 'ObjectPattern') {
|
1267 | return checkObjectPattern({input, properties, scope});
|
1268 | }
|
1269 | const propNames = [];
|
1270 | const check = properties.reduce((expr, prop, index) => {
|
1271 | const target = prop.key.type === 'Identifier' ? t.memberExpression(input, prop.key) : t.memberExpression(input, prop.key, true);
|
1272 | propNames.push(prop.key.type === 'Identifier' ? t.stringLiteral(prop.key.name) : prop.key);
|
1273 | let check = checkAnnotation(target, prop.value, scope);
|
1274 | if (check) {
|
1275 | if (prop.optional) {
|
1276 | check = t.logicalExpression(
|
1277 | '||',
|
1278 | checks.undefined({input: target}),
|
1279 | check
|
1280 | );
|
1281 | }
|
1282 | return t.logicalExpression(
|
1283 | "&&",
|
1284 | expr,
|
1285 | check
|
1286 | );
|
1287 | }
|
1288 | else {
|
1289 | return expr;
|
1290 | }
|
1291 | }, checkIsObject({input}));
|
1292 |
|
1293 | if (indexers.length) {
|
1294 | return indexers.reduceRight((expr, indexer) => {
|
1295 | if (indexer.value.type === 'AnyTypeAnnotation') {
|
1296 | return expr;
|
1297 | }
|
1298 | const value = scope.generateUidIdentifier(indexer.id.name);
|
1299 | let check = checkAnnotation(value, indexer.value, scope);
|
1300 | const fixedKeys = t.arrayExpression(propNames);
|
1301 |
|
1302 | if (check) {
|
1303 | if (propNames.length) {
|
1304 | return t.logicalExpression('&&', expr, checkObjectIndexers({input, value, check, fixedKeys}));
|
1305 | }
|
1306 | else {
|
1307 | return t.logicalExpression('&&', expr, checkObjectIndexersNoFixed({input, value, check, fixedKeys}));
|
1308 | }
|
1309 | }
|
1310 | else {
|
1311 | return expr;
|
1312 | }
|
1313 | }, check);
|
1314 | }
|
1315 |
|
1316 | return check;
|
1317 | }
|
1318 |
|
1319 | function checkObjectPattern ({input, properties, scope}): ?Node {
|
1320 | const propNames = properties.reduce((names, prop) => {
|
1321 | names[prop.key.name] = prop;
|
1322 | return names;
|
1323 | }, {});
|
1324 | const propChecks = {};
|
1325 | for (let item of input.properties) {
|
1326 | let {key, value: id} = item;
|
1327 | let prop = propNames[key.name];
|
1328 | if (!prop) {
|
1329 | continue;
|
1330 | }
|
1331 | const check = checkAnnotation(id, prop.value, scope);
|
1332 | if (check) {
|
1333 | propChecks[key.name] = check;
|
1334 | }
|
1335 | }
|
1336 | return Object.keys(propChecks).reduce((last, name) => {
|
1337 | const check = propChecks[name];
|
1338 | if (last === null) {
|
1339 | return check;
|
1340 | }
|
1341 | else {
|
1342 | return t.logicalExpression('&&', last, check);
|
1343 | }
|
1344 | }, null);
|
1345 | }
|
1346 |
|
1347 | function createTypeAliasChecks (path: NodePath): Node {
|
1348 | const {node, scope} = path;
|
1349 | const {id, right: annotation} = node;
|
1350 | const input = t.identifier('input');
|
1351 | const check = checkAnnotation(input, annotation, scope) || t.booleanLiteral(true);
|
1352 | const declaration = declareTypeChecker({id, check});
|
1353 | declaration.isTypeChecker = true;
|
1354 | declaration.savedTypeAnnotation = annotation;
|
1355 | declaration.declarations[0].savedTypeAnnotation = annotation;
|
1356 | return declaration;
|
1357 | }
|
1358 |
|
1359 |
|
1360 | function createInterfaceChecks (path: NodePath): Node {
|
1361 | const {node, scope} = path;
|
1362 | const {id, body: annotation} = node;
|
1363 | const input = t.identifier('input');
|
1364 | const check = node.extends.reduce(
|
1365 | (check, extender) => {
|
1366 | return t.logicalExpression(
|
1367 | '&&',
|
1368 | check,
|
1369 | checkAnnotation(input, t.genericTypeAnnotation(extender.id), path.scope)
|
1370 | );
|
1371 | return check;
|
1372 | },
|
1373 | checkAnnotation(input, annotation, scope) || t.booleanLiteral(true)
|
1374 | );
|
1375 |
|
1376 | const declaration = declareTypeChecker({id, check});
|
1377 | declaration.isTypeChecker = true;
|
1378 | return declaration;
|
1379 | }
|
1380 |
|
1381 | function checkAnnotation (input: Node, annotation: TypeAnnotation, scope: Scope): ?Node {
|
1382 | switch (annotation.type) {
|
1383 | case 'TypeAnnotation':
|
1384 | case 'FunctionTypeParam':
|
1385 | return checkAnnotation(input, annotation.typeAnnotation, scope);
|
1386 | case 'TypeofTypeAnnotation':
|
1387 | return checks.typeof({input, annotation: annotation.argument, scope});
|
1388 | case 'GenericTypeAnnotation':
|
1389 | if (annotation.id.name === 'Array') {
|
1390 | return checks.array({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1391 | }
|
1392 | else if (annotation.id.name === 'Generator' && !scope.hasBinding('Generator')) {
|
1393 | return checks.generator({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1394 | }
|
1395 | else if (annotation.id.name === 'Iterable' && !scope.hasBinding('Iterable')) {
|
1396 | return checks.iterable({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1397 | }
|
1398 | else if (annotation.id.name === 'Map' && !scope.hasBinding('Map')) {
|
1399 | return checks.map({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1400 | }
|
1401 | else if (annotation.id.name === 'Set' && !scope.hasBinding('Set')) {
|
1402 | return checks.set({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1403 | }
|
1404 | else if (annotation.id.name === 'Function') {
|
1405 | return checks.function({input});
|
1406 | }
|
1407 | else if (annotation.id.name === 'Class' && !scope.hasBinding('Class')) {
|
1408 | return checks.class({input, types: annotation.typeParameters ? annotation.typeParameters.params : [], scope});
|
1409 | }
|
1410 | else if (annotation.id.name === 'int8' && !scope.hasBinding('int8')) {
|
1411 | return checks.int8({input});
|
1412 | }
|
1413 | else if (annotation.id.name === 'uint8' && !scope.hasBinding('uint8')) {
|
1414 | return checks.uint8({input});
|
1415 | }
|
1416 | else if (annotation.id.name === 'int16' && !scope.hasBinding('int16')) {
|
1417 | return checks.int16({input});
|
1418 | }
|
1419 | else if (annotation.id.name === 'uint16' && !scope.hasBinding('uint16')) {
|
1420 | return checks.uint16({input});
|
1421 | }
|
1422 | else if (annotation.id.name === 'int32' && !scope.hasBinding('int32')) {
|
1423 | return checks.int32({input});
|
1424 | }
|
1425 | else if (annotation.id.name === 'uint32' && !scope.hasBinding('uint32')) {
|
1426 | return checks.uint32({input});
|
1427 | }
|
1428 | else if (annotation.id.name === 'float32' && !scope.hasBinding('float32')) {
|
1429 | return checks.float32({input});
|
1430 | }
|
1431 | else if (annotation.id.name === 'float64' && !scope.hasBinding('float64')) {
|
1432 | return checks.float64({input});
|
1433 | }
|
1434 | else if (annotation.id.name === 'Symbol' && !scope.hasBinding('Symbol')) {
|
1435 | return checks.symbol({input});
|
1436 | }
|
1437 | else if (isTypeChecker(annotation.id, scope)) {
|
1438 | return checks.type({input, type: annotation.id});
|
1439 | }
|
1440 | else if (isPolymorphicType(annotation.id, scope)) {
|
1441 | return;
|
1442 | }
|
1443 | else {
|
1444 | return checks.instanceof({input, type: createTypeExpression(annotation.id)});
|
1445 | }
|
1446 | case 'TupleTypeAnnotation':
|
1447 | return checks.tuple({input, types: annotation.types, scope});
|
1448 | case 'NumberTypeAnnotation':
|
1449 | return checks.number({input});
|
1450 | case 'NumericLiteralTypeAnnotation':
|
1451 | return checks.numericLiteral({input, annotation});
|
1452 | case 'BooleanTypeAnnotation':
|
1453 | return checks.boolean({input});
|
1454 | case 'BooleanLiteralTypeAnnotation':
|
1455 | return checks.booleanLiteral({input, annotation});
|
1456 | case 'StringTypeAnnotation':
|
1457 | return checks.string({input});
|
1458 | case 'StringLiteralTypeAnnotation':
|
1459 | return checks.stringLiteral({input, annotation});
|
1460 | case 'UnionTypeAnnotation':
|
1461 | return checks.union({input, types: annotation.types, scope});
|
1462 | case 'IntersectionTypeAnnotation':
|
1463 | return checks.intersection({input, types: annotation.types, scope});
|
1464 | case 'ObjectTypeAnnotation':
|
1465 | return checks.object({input, properties: annotation.properties || [], indexers: annotation.indexers, scope});
|
1466 | case 'ArrayTypeAnnotation':
|
1467 | return checks.array({input, types: [annotation.elementType || t.anyTypeAnnotation()], scope});
|
1468 | case 'FunctionTypeAnnotation':
|
1469 | return checks.function({input, params: annotation.params, returnType: annotation.returnType});
|
1470 | case 'MixedTypeAnnotation':
|
1471 | return checks.mixed({input});
|
1472 | case 'AnyTypeAnnotation':
|
1473 | case 'ExistentialTypeParam':
|
1474 | return checks.any({input});
|
1475 | case 'NullableTypeAnnotation':
|
1476 | return checks.nullable({input, type: annotation.typeAnnotation, scope});
|
1477 | case 'VoidTypeAnnotation':
|
1478 | return checks.void({input});
|
1479 | }
|
1480 | }
|
1481 |
|
1482 | function staticCheckAnnotation (path: NodePath, annotation: TypeAnnotation): ?boolean {
|
1483 | const other = getAnnotation(path);
|
1484 | switch (annotation.type) {
|
1485 | case 'TypeAnnotation':
|
1486 | case 'FunctionTypeParam':
|
1487 | return staticCheckAnnotation(path, annotation.typeAnnotation);
|
1488 | case 'GenericTypeAnnotation':
|
1489 | if (isTypeChecker(annotation.id, path.scope)) {
|
1490 | return staticChecks.type({path, type: annotation.id});
|
1491 | }
|
1492 | else if (isPolymorphicType(annotation.id, path.scope)) {
|
1493 | return;
|
1494 | }
|
1495 | else if (annotation.id.name === 'Symbol') {
|
1496 | return staticChecks.symbol(path);
|
1497 | }
|
1498 | else {
|
1499 | return staticChecks.instanceof({path, annotation});
|
1500 | }
|
1501 | }
|
1502 | return compareAnnotations(annotation, other);
|
1503 | }
|
1504 |
|
1505 | |
1506 |
|
1507 |
|
1508 | function getAnnotation (path: NodePath): TypeAnnotation {
|
1509 | let annotation;
|
1510 | try {
|
1511 | annotation = getAnnotationShallow(path);
|
1512 | }
|
1513 | catch (e) {
|
1514 | if (e instanceof SyntaxError) {
|
1515 | throw e;
|
1516 | }
|
1517 | if (process.env.TYPECHECK_DEBUG) {
|
1518 | console.error(e.stack);
|
1519 | }
|
1520 | }
|
1521 | while (annotation && annotation.type === 'TypeAnnotation') {
|
1522 | annotation = annotation.typeAnnotation;
|
1523 | }
|
1524 | return annotation || t.anyTypeAnnotation();
|
1525 | }
|
1526 |
|
1527 | function getAnnotationShallow (path: NodePath): ?TypeAnnotation {
|
1528 | if (!path || !path.node) {
|
1529 | return t.voidTypeAnnotation();
|
1530 | }
|
1531 | const {node, scope} = path;
|
1532 |
|
1533 | if (node.type === 'TypeAlias') {
|
1534 | return node.right;
|
1535 | }
|
1536 | else if (node.type === 'ClassProperty' && node.typeAnnotation) {
|
1537 | return getClassPropertyAnnotation(path);
|
1538 | }
|
1539 | else if (node.type === 'ClassMethod' && node.returnType) {
|
1540 | return getClassMethodAnnotation(path);
|
1541 | }
|
1542 | else if (node.type === 'ObjectProperty' && node.typeAnnotation) {
|
1543 | return getObjectPropertyAnnotation(path);
|
1544 | }
|
1545 | else if (node.type === 'SpreadProperty' && node.typeAnnotation) {
|
1546 | return getSpreadPropertyAnnotation(path);
|
1547 | }
|
1548 | else if (node.type === 'ObjectMethod' && node.returnType) {
|
1549 | return getObjectMethodAnnotation(path);
|
1550 | }
|
1551 | else if (!node.typeAnnotation && !node.savedTypeAnnotation && !node.returnType) {
|
1552 | switch (path.type) {
|
1553 | case 'Identifier':
|
1554 | const binding = scope.getBinding(node.name);
|
1555 | if (!binding || !binding.identifier) {
|
1556 | return path.getTypeAnnotation();
|
1557 | }
|
1558 | const id = binding.identifier;
|
1559 | if (binding.path.type === 'ObjectPattern') {
|
1560 | return getObjectPatternAnnotation(binding.path, node.name);
|
1561 | }
|
1562 | if (id.savedTypeAnnotation) {
|
1563 | return id.savedTypeAnnotation;
|
1564 | }
|
1565 | else if (id.returnType) {
|
1566 | return id.returnType;
|
1567 | }
|
1568 | else if (id.typeAnnotation) {
|
1569 | return id.typeAnnotation;
|
1570 | }
|
1571 | else if (isPolymorphicType(id, scope)) {
|
1572 | return t.anyTypeAnnotation();
|
1573 | }
|
1574 | return binding.constant ? binding.path.getTypeAnnotation() : path.getTypeAnnotation();
|
1575 | case 'StringLiteral':
|
1576 | case 'NumericLiteral':
|
1577 | case 'BooleanLiteral':
|
1578 | return createLiteralTypeAnnotation(path);
|
1579 | case 'CallExpression':
|
1580 | const callee = path.get('callee');
|
1581 | if (callee.type === 'Identifier') {
|
1582 | if (callee.name === 'Symbol') {
|
1583 | return t.genericTypeAnnotation('Symbol');
|
1584 | }
|
1585 | const fn = getFunctionForIdentifier(callee);
|
1586 | if (fn) {
|
1587 | return getAnnotation(fn);
|
1588 | }
|
1589 | }
|
1590 | break;
|
1591 | case 'ThisExpression':
|
1592 | return getThisExpressionAnnotation(path);
|
1593 | case 'AssignmentExpression':
|
1594 | return getAssignmentExpressionAnnotation(path);
|
1595 | case 'MemberExpression':
|
1596 | return getMemberExpressionAnnotation(path);
|
1597 | case 'ArrayExpression':
|
1598 | return getArrayExpressionAnnotation(path);
|
1599 | case 'ObjectExpression':
|
1600 | return getObjectExpressionAnnotation(path);
|
1601 | case 'BinaryExpression':
|
1602 | return getBinaryExpressionAnnotation(path);
|
1603 | case 'BinaryExpression':
|
1604 | return getBinaryExpressionAnnotation(path);
|
1605 | case 'LogicalExpression':
|
1606 | return getLogicalExpressionAnnotation(path);
|
1607 | case 'ConditionalExpression':
|
1608 | return getConditionalExpressionAnnotation(path);
|
1609 | case 'ObjectMethod':
|
1610 | return getObjectMethodAnnotation(path);
|
1611 | case 'SpreadProperty':
|
1612 | return getSpreadPropertyAnnotation(path);
|
1613 | case 'ObjectProperty':
|
1614 | return getObjectPropertyAnnotation(path);
|
1615 | case 'ClassDeclaration':
|
1616 | return getClassDeclarationAnnotation(path);
|
1617 | case 'ClassMethod':
|
1618 | return getClassMethodAnnotation(path);
|
1619 | case 'ClassProperty':
|
1620 | return getClassPropertyAnnotation(path);
|
1621 | default:
|
1622 | return path.getTypeAnnotation();
|
1623 |
|
1624 | }
|
1625 | }
|
1626 | return node.savedTypeAnnotation || node.returnType || node.typeAnnotation || path.getTypeAnnotation();
|
1627 | }
|
1628 |
|
1629 | function createLiteralTypeAnnotation (path: NodePath): ?TypeAnnotation {
|
1630 | let annotation;
|
1631 | if (path.isStringLiteral()) {
|
1632 | annotation = t.stringLiteralTypeAnnotation();
|
1633 | }
|
1634 | else if (path.isNumericLiteral()) {
|
1635 | annotation = t.numericLiteralTypeAnnotation();
|
1636 | }
|
1637 | else if (path.isBooleanLiteral()) {
|
1638 | annotation = t.booleanLiteralTypeAnnotation();
|
1639 | }
|
1640 | else {
|
1641 | return path.getTypeAnnotation();
|
1642 | }
|
1643 | annotation.value = path.node.value;
|
1644 | return annotation;
|
1645 | }
|
1646 |
|
1647 | function getObjectPatternAnnotation (path: NodePath, name: string): ?TypeAnnotation {
|
1648 | let annotation = keyByName(getAnnotation(path), name);
|
1649 | let found;
|
1650 | if (!path.node.properties) {
|
1651 | return;
|
1652 | }
|
1653 | for (let prop of path.get('properties')) {
|
1654 | if (prop.node.value && prop.node.value.name === name) {
|
1655 | found = prop.get('key');
|
1656 | break;
|
1657 | }
|
1658 | else if (prop.node.key.type === 'Identifier' && prop.node.key.name === name) {
|
1659 | found = prop.get('key');
|
1660 | break;
|
1661 | }
|
1662 | }
|
1663 | if (!annotation || !found) {
|
1664 | return;
|
1665 | }
|
1666 | if (found.type === 'Identifier') {
|
1667 | annotation.value.authoritative = false;
|
1668 | return annotation.value;
|
1669 | }
|
1670 | }
|
1671 |
|
1672 |
|
1673 | function keyByName (node: Node, name: string): ?Node {
|
1674 | if (!node.properties) {
|
1675 | return;
|
1676 | }
|
1677 | for (let prop of node.properties) {
|
1678 | if (prop.key && prop.key.name === name) {
|
1679 | return prop;
|
1680 | }
|
1681 | }
|
1682 | }
|
1683 |
|
1684 | function valueByName (node: Node, name: string): ?Node {
|
1685 | if (!node.properties) {
|
1686 | return;
|
1687 | }
|
1688 | for (let prop of node.properties) {
|
1689 | if (prop.value && prop.value.name === name) {
|
1690 | return prop;
|
1691 | }
|
1692 | }
|
1693 | }
|
1694 |
|
1695 | function getSpreadPropertyAnnotation (path: NodePath): ?TypeAnnotation {
|
1696 | const {node} = path;
|
1697 | let annotation = node.typeAnnotation || node.savedTypeAnnotation;
|
1698 | if (!annotation) {
|
1699 | annotation = getAnnotation(path.get('argument'));
|
1700 | }
|
1701 | return annotation;
|
1702 | }
|
1703 |
|
1704 | function getObjectPropertyAnnotation (path: NodePath): ?TypeAnnotation {
|
1705 | const {node} = path;
|
1706 | let annotation = node.typeAnnotation || node.savedTypeAnnotation;
|
1707 | if (!annotation) {
|
1708 | if (node.value) {
|
1709 | annotation = node.value.typeAnnotation || node.value.savedTypeAnnotation || t.anyTypeAnnotation();
|
1710 | }
|
1711 | else {
|
1712 | annotation = t.anyTypeAnnotation();
|
1713 | }
|
1714 | }
|
1715 | return t.objectTypeProperty(
|
1716 | node.key,
|
1717 | annotation
|
1718 | );
|
1719 | }
|
1720 |
|
1721 | function getObjectMethodAnnotation (path: NodePath): ?TypeAnnotation {
|
1722 | const {node} = path;
|
1723 | return t.objectTypeProperty(
|
1724 | t.identifier(node.key.name),
|
1725 | t.functionTypeAnnotation(
|
1726 | null,
|
1727 | node.params.map(param => param.savedTypeAnnotation || param.typeAnnotation),
|
1728 | null,
|
1729 | node.savedTypeAnnotation || node.returnType || node.typeAnnotation || t.anyTypeAnnotation()
|
1730 | )
|
1731 | );
|
1732 | }
|
1733 |
|
1734 | function getThisExpressionAnnotation (path: NodePath): ?TypeAnnotation {
|
1735 | let parent = path.parentPath;
|
1736 | loop: while (parent) {
|
1737 | switch (parent.type) {
|
1738 | case 'ClassDeclaration':
|
1739 | return getAnnotation(parent);
|
1740 | case 'ClassBody':
|
1741 | return getAnnotation(parent.parentPath);
|
1742 | case 'ClassMethod':
|
1743 | case 'ClassProperty':
|
1744 | return getAnnotation(parent.parentPath.parentPath);
|
1745 | case 'ObjectProperty':
|
1746 | return getAnnotation(parent.parentPath);
|
1747 | case 'ObjectMethod':
|
1748 | return getAnnotation(parent.parentPath);
|
1749 | case 'FunctionExpression':
|
1750 | if (parent.parentPath.type === 'ObjectProperty') {
|
1751 | return getAnnotation(parent.parentPath.parentPath);
|
1752 | }
|
1753 | break loop;
|
1754 | case 'ArrowFunctionExpression':
|
1755 | parent = parent.parentPath;
|
1756 | continue;
|
1757 | }
|
1758 | if (parent.isFunction()) {
|
1759 | break;
|
1760 | }
|
1761 | parent = parent.parentPath;
|
1762 | }
|
1763 | return t.objectTypeAnnotation([]);
|
1764 | }
|
1765 |
|
1766 | function getClassDeclarationAnnotation (path: NodePath): ?TypeAnnotation {
|
1767 | const body = path.get('body').get('body').map(getAnnotation).filter(annotation => annotation && annotation.type !== 'AnyTypeAnnotation');
|
1768 | return t.objectTypeAnnotation(body);
|
1769 | }
|
1770 |
|
1771 | function getAssignmentExpressionAnnotation (path: NodePath): ?TypeAnnotation {
|
1772 | if (path.node.operator === '=') {
|
1773 | return getAnnotation(path.get('right'));
|
1774 | }
|
1775 | }
|
1776 |
|
1777 | function getClassPropertyAnnotation (path: NodePath): ?TypeAnnotation {
|
1778 | const {node} = path;
|
1779 | if (node.computed) {
|
1780 | return;
|
1781 | }
|
1782 | const annotation = node.typeAnnotation || (node.value ? node.value.savedTypeAnnotation || node.value.typeAnnotation : t.anyTypeAnnotation());
|
1783 | return t.objectTypeProperty(
|
1784 | node.key,
|
1785 | annotation || t.anyTypeAnnotation()
|
1786 | );
|
1787 | }
|
1788 |
|
1789 | function getClassMethodAnnotation (path: NodePath): ?TypeAnnotation {
|
1790 | const {node} = path;
|
1791 | if (node.computed) {
|
1792 | return;
|
1793 | }
|
1794 | if (node.kind === 'get') {
|
1795 | return t.objectTypeProperty(
|
1796 | node.key,
|
1797 | node.savedTypeAnnotation || node.returnType || node.typeAnnotation || t.anyTypeAnnotation()
|
1798 | );
|
1799 | }
|
1800 | else if (node.kind === 'set') {
|
1801 | return t.objectTypeProperty(
|
1802 | node.key,
|
1803 | node.params.map(param => param.savedTypeAnnotation || param.typeAnnotation).shift() || t.anyTypeAnnotation()
|
1804 | );
|
1805 | }
|
1806 | else {
|
1807 | return t.objectTypeProperty(
|
1808 | node.key,
|
1809 | t.functionTypeAnnotation(
|
1810 | null,
|
1811 | node.params.map(param => param.savedTypeAnnotation || param.typeAnnotation || t.anyTypeAnnotation()),
|
1812 | null,
|
1813 | node.savedTypeAnnotation || node.returnType || node.typeAnnotation || t.anyTypeAnnotation()
|
1814 | )
|
1815 | );
|
1816 | }
|
1817 | }
|
1818 |
|
1819 | function getBinaryExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1820 | const {node} = path;
|
1821 | if (isBooleanExpression(node)) {
|
1822 | return t.booleanTypeAnnotation();
|
1823 | }
|
1824 | else {
|
1825 | return t.anyTypeAnnotation();
|
1826 | }
|
1827 | }
|
1828 |
|
1829 | function getLogicalExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1830 | const {node} = path;
|
1831 | if (isBooleanExpression(node)) {
|
1832 | return t.booleanTypeAnnotation();
|
1833 | }
|
1834 | else {
|
1835 | let left = path.get('left');
|
1836 | let right = path.get('right');
|
1837 | switch (node.operator) {
|
1838 | case '&&':
|
1839 | case '||':
|
1840 | ([left, right] = [getAnnotation(left), getAnnotation(right)]);
|
1841 | if (t.isUnionTypeAnnotation(left)) {
|
1842 | if (t.isUnionTypeAnnotation(right)) {
|
1843 | return t.unionTypeAnnotation(left.types.concat(right.types));
|
1844 | }
|
1845 | else {
|
1846 | return t.unionTypeAnnotation(left.types.concat(right));
|
1847 | }
|
1848 | }
|
1849 | else {
|
1850 | return t.unionTypeAnnotation([left, right]);
|
1851 | }
|
1852 | }
|
1853 | return t.anyTypeAnnotation();
|
1854 | }
|
1855 | }
|
1856 |
|
1857 |
|
1858 | function getConditionalExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1859 | const {node} = path;
|
1860 | const consequent = getAnnotation(path.get('consequent'));
|
1861 | const alternate = getAnnotation(path.get('alternate'));
|
1862 | if (t.isUnionTypeAnnotation(consequent)) {
|
1863 | if (t.isUnionTypeAnnotation(alternate)) {
|
1864 | return t.unionTypeAnnotation(consequent.types.concat(alternate.types));
|
1865 | }
|
1866 | else {
|
1867 | return t.unionTypeAnnotation(consequent.types.concat(alternate));
|
1868 | }
|
1869 | }
|
1870 | else {
|
1871 | return t.unionTypeAnnotation([consequent, alternate]);
|
1872 | }
|
1873 | }
|
1874 |
|
1875 | function getArrayExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1876 | return t.genericTypeAnnotation(
|
1877 | t.identifier('Array'),
|
1878 | t.typeParameterDeclaration(path.get('elements').map(getAnnotation))
|
1879 | );
|
1880 | }
|
1881 |
|
1882 | function getObjectExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1883 | const annotation = t.objectTypeAnnotation(
|
1884 | path.get('properties')
|
1885 | .filter(prop => !prop.node.computed)
|
1886 | .map(getAnnotation)
|
1887 | .reduce((properties, prop) => {
|
1888 | if (t.isObjectTypeProperty(prop)) {
|
1889 | properties.push(prop);
|
1890 | }
|
1891 | else if (t.isObjectTypeAnnotation(prop)) {
|
1892 | properties.push(...prop.properties);
|
1893 | }
|
1894 | return properties;
|
1895 | }, [])
|
1896 | .filter(annotation => !t.isAnyTypeAnnotation(annotation.value))
|
1897 | );
|
1898 | return annotation;
|
1899 | }
|
1900 |
|
1901 | function getMemberExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1902 | if (path.node.computed) {
|
1903 | return getComputedMemberExpressionAnnotation(path);
|
1904 | }
|
1905 | const stack = [];
|
1906 | let target = path;
|
1907 | while (target.isMemberExpression()) {
|
1908 | stack.push(target);
|
1909 | if (target.node.computed) {
|
1910 | break;
|
1911 | }
|
1912 | target = target.get('object');
|
1913 | }
|
1914 | const objectAnnotation = stack.reduceRight((last, target) => {
|
1915 | let annotation = last;
|
1916 | if (annotation == null) {
|
1917 | if (stack.length === 1) {
|
1918 | annotation = getAnnotation(target.get('object'));
|
1919 | }
|
1920 | else {
|
1921 | return getAnnotation(target);
|
1922 | }
|
1923 | }
|
1924 |
|
1925 | switch (annotation.type) {
|
1926 | case 'AnyTypeAnnotation':
|
1927 | return annotation;
|
1928 | case 'NullableTypeAnnotation':
|
1929 | case 'TypeAnnotation':
|
1930 | annotation = annotation.typeAnnotation;
|
1931 | }
|
1932 |
|
1933 | if (annotation.type === 'GenericTypeAnnotation') {
|
1934 | const typeChecker = getTypeChecker(annotation.id, path.scope);
|
1935 | if (typeChecker) {
|
1936 | annotation = getAnnotation(typeChecker);
|
1937 | }
|
1938 | else {
|
1939 | const binding = path.scope.getBinding(annotation.id.name);
|
1940 | if (binding) {
|
1941 | annotation = getAnnotation(binding.path);
|
1942 | }
|
1943 | }
|
1944 | }
|
1945 | switch (annotation.type) {
|
1946 | case 'AnyTypeAnnotation':
|
1947 | return annotation;
|
1948 | case 'ObjectTypeAnnotation':
|
1949 | const id = target.get('property').node;
|
1950 | for (let {key, value} of annotation.properties || []) {
|
1951 | if (key.name === id.name) {
|
1952 | return value.type === 'VoidTypeAnnotation' ? t.anyTypeAnnotation() : value;
|
1953 | }
|
1954 | }
|
1955 | }
|
1956 | return t.anyTypeAnnotation();
|
1957 | }, null);
|
1958 |
|
1959 | return objectAnnotation || path.getTypeAnnotation();
|
1960 | }
|
1961 |
|
1962 | function getComputedMemberExpressionAnnotation (path: NodePath): TypeAnnotation {
|
1963 | const object = path.get('object');
|
1964 | const property = path.get('property');
|
1965 | let objectAnnotation = getAnnotation(object);
|
1966 | if (objectAnnotation.type === 'TypeAnnotation' || objectAnnotation.type === 'NullableTypeAnnotation') {
|
1967 | objectAnnotation = objectAnnotation.typeAnnotation;
|
1968 | }
|
1969 | let propertyAnnotation = getAnnotation(property);
|
1970 | if (propertyAnnotation.type === 'TypeAnnotation' || propertyAnnotation.type === 'NullableTypeAnnotation') {
|
1971 | propertyAnnotation = propertyAnnotation.typeAnnotation;
|
1972 | }
|
1973 | const {confident, value} = property.evaluate();
|
1974 | if (!confident) {
|
1975 | return path.getTypeAnnotation();
|
1976 | }
|
1977 | switch (objectAnnotation.type) {
|
1978 | case 'TupleTypeAnnotation':
|
1979 | if (objectAnnotation.types.length === 0) {
|
1980 | break;
|
1981 | }
|
1982 | else if (typeof value === 'number') {
|
1983 | if (!objectAnnotation.types[value]) {
|
1984 | throw path.buildCodeFrameError(`Invalid computed member expression for tuple: ` + humanReadableType(objectAnnotation));
|
1985 | }
|
1986 | return objectAnnotation.types[value];
|
1987 | }
|
1988 | else {
|
1989 | throw path.buildCodeFrameError(`Invalid computed member expression for tuple: ` + humanReadableType(objectAnnotation));
|
1990 | }
|
1991 | break;
|
1992 | }
|
1993 | return path.getTypeAnnotation();
|
1994 | }
|
1995 |
|
1996 | function getFunctionForIdentifier (path: NodePath): boolean|Node {
|
1997 | if (path.type !== 'Identifier') {
|
1998 | return false;
|
1999 | }
|
2000 | const ref = path.scope.getBinding(path.node.name);
|
2001 | if (!ref) {
|
2002 | return false;
|
2003 | }
|
2004 | return t.isFunction(ref.path.parent) && ref.path.parentPath;
|
2005 | }
|
2006 |
|
2007 | |
2008 |
|
2009 |
|
2010 |
|
2011 | function isStrictlyArrayAnnotation (annotation: TypeAnnotation): boolean {
|
2012 | switch (annotation.type) {
|
2013 | case 'TypeAnnotation':
|
2014 | case 'FunctionTypeParam':
|
2015 | return isStrictlyArrayAnnotation(annotation.typeAnnotation);
|
2016 | case 'GenericTypeAnnotation':
|
2017 | return annotation.id.name === 'Array';
|
2018 | case 'UnionTypeAnnotation':
|
2019 | return annotation.types.every(isStrictlyArrayAnnotation);
|
2020 | default:
|
2021 | return false;
|
2022 | }
|
2023 | }
|
2024 |
|
2025 | function compareMaybeUnion (annotation: TypeAnnotation, comparator: (node: TypeAnnotation) => ?boolean): ?boolean {
|
2026 | let falseCount = 0;
|
2027 | for (let type of annotation.types) {
|
2028 | const result = comparator(type);
|
2029 | if (result === true) {
|
2030 | return true;
|
2031 | }
|
2032 | else if (result === false) {
|
2033 | falseCount++;
|
2034 | }
|
2035 | }
|
2036 | if (falseCount === annotation.types.length) {
|
2037 | return false;
|
2038 | }
|
2039 | else {
|
2040 | return null;
|
2041 | }
|
2042 | }
|
2043 |
|
2044 | |
2045 |
|
2046 |
|
2047 |
|
2048 | function maybeNumberAnnotation (annotation: TypeAnnotation): ?boolean {
|
2049 | switch (annotation.type) {
|
2050 | case 'TypeAnnotation':
|
2051 | case 'FunctionTypeParam':
|
2052 | case 'NullableTypeAnnotation':
|
2053 | return maybeNumberAnnotation(annotation.typeAnnotation);
|
2054 | case 'NumberTypeAnnotation':
|
2055 | case 'NumericLiteralTypeAnnotation':
|
2056 | return true;
|
2057 | case 'GenericTypeAnnotation':
|
2058 | switch (annotation.id.name) {
|
2059 | case 'Array':
|
2060 | case 'Function':
|
2061 | case 'Object':
|
2062 | case 'String':
|
2063 | case 'Boolean':
|
2064 | case 'Date':
|
2065 | case 'RegExp':
|
2066 | return false;
|
2067 | default:
|
2068 | return null;
|
2069 | }
|
2070 | case 'UnionTypeAnnotation':
|
2071 | return compareMaybeUnion(annotation, maybeNumberAnnotation);
|
2072 | case 'AnyTypeAnnotation':
|
2073 | case 'MixedTypeAnnotation':
|
2074 | case 'IntersectionTypeAnnotation':
|
2075 | return null;
|
2076 | default:
|
2077 | return false;
|
2078 | }
|
2079 | }
|
2080 |
|
2081 | |
2082 |
|
2083 |
|
2084 |
|
2085 | function maybeStringAnnotation (annotation: TypeAnnotation): ?boolean {
|
2086 | switch (annotation.type) {
|
2087 | case 'TypeAnnotation':
|
2088 | case 'FunctionTypeParam':
|
2089 | case 'NullableTypeAnnotation':
|
2090 | return maybeStringAnnotation(annotation.typeAnnotation);
|
2091 | case 'StringTypeAnnotation':
|
2092 | return true;
|
2093 | case 'StringLiteralTypeAnnotation':
|
2094 | return null;
|
2095 | case 'GenericTypeAnnotation':
|
2096 | switch (annotation.id.name) {
|
2097 | case 'Array':
|
2098 | case 'Function':
|
2099 | case 'Object':
|
2100 | case 'Number':
|
2101 | case 'Boolean':
|
2102 | case 'Date':
|
2103 | case 'RegExp':
|
2104 | return false;
|
2105 | default:
|
2106 | return null;
|
2107 | }
|
2108 | case 'UnionTypeAnnotation':
|
2109 | let falseCount = 0;
|
2110 | for (let type of annotation.types) {
|
2111 | const result = maybeStringAnnotation(type);
|
2112 | if (result === true) {
|
2113 | return true;
|
2114 | }
|
2115 | else if (result === false) {
|
2116 | falseCount++;
|
2117 | }
|
2118 | }
|
2119 | if (falseCount === annotation.types.length) {
|
2120 | return false;
|
2121 | }
|
2122 | else {
|
2123 | return null;
|
2124 | }
|
2125 | case 'AnyTypeAnnotation':
|
2126 | case 'MixedTypeAnnotation':
|
2127 | case 'IntersectionTypeAnnotation':
|
2128 | return null;
|
2129 | default:
|
2130 | return false;
|
2131 | }
|
2132 | }
|
2133 |
|
2134 |
|
2135 |
|
2136 |
|
2137 |
|
2138 | function maybeSymbolAnnotation (annotation: TypeAnnotation): ?boolean {
|
2139 | switch (annotation.type) {
|
2140 | case 'TypeAnnotation':
|
2141 | case 'FunctionTypeParam':
|
2142 | case 'NullableTypeAnnotation':
|
2143 | return maybeSymbolAnnotation(annotation.typeAnnotation);
|
2144 | case 'GenericTypeAnnotation':
|
2145 | switch (annotation.id.name) {
|
2146 | case 'Array':
|
2147 | case 'Function':
|
2148 | case 'Object':
|
2149 | case 'Number':
|
2150 | case 'Boolean':
|
2151 | case 'Date':
|
2152 | case 'RegExp':
|
2153 | return false;
|
2154 | case 'Symbol':
|
2155 | return true;
|
2156 | default:
|
2157 | return null;
|
2158 | }
|
2159 | case 'UnionTypeAnnotation':
|
2160 | let falseCount = 0;
|
2161 | for (let type of annotation.types) {
|
2162 | const result = maybeSymbolAnnotation(type);
|
2163 | if (result === true) {
|
2164 | return true;
|
2165 | }
|
2166 | else if (result === false) {
|
2167 | falseCount++;
|
2168 | }
|
2169 | }
|
2170 | if (falseCount === annotation.types.length) {
|
2171 | return false;
|
2172 | }
|
2173 | else {
|
2174 | return null;
|
2175 | }
|
2176 | case 'AnyTypeAnnotation':
|
2177 | case 'MixedTypeAnnotation':
|
2178 | case 'IntersectionTypeAnnotation':
|
2179 | return null;
|
2180 | default:
|
2181 | return false;
|
2182 | }
|
2183 | }
|
2184 |
|
2185 |
|
2186 | |
2187 |
|
2188 |
|
2189 |
|
2190 | function maybeBooleanAnnotation (annotation: TypeAnnotation): ?boolean {
|
2191 | switch (annotation.type) {
|
2192 | case 'TypeAnnotation':
|
2193 | case 'FunctionTypeParam':
|
2194 | case 'NullableTypeAnnotation':
|
2195 | return maybeBooleanAnnotation(annotation.typeAnnotation);
|
2196 | case 'BooleanTypeAnnotation':
|
2197 | case 'BooleanLiteralTypeAnnotation':
|
2198 | return true;
|
2199 | case 'GenericTypeAnnotation':
|
2200 | switch (annotation.id.name) {
|
2201 | case 'Array':
|
2202 | case 'Function':
|
2203 | case 'Object':
|
2204 | case 'String':
|
2205 | case 'Number':
|
2206 | case 'Date':
|
2207 | case 'RegExp':
|
2208 | return false;
|
2209 | default:
|
2210 | return null;
|
2211 | }
|
2212 | case 'UnionTypeAnnotation':
|
2213 | let falseCount = 0;
|
2214 | for (let type of annotation.types) {
|
2215 | const result = maybeBooleanAnnotation(type);
|
2216 | if (result === true) {
|
2217 | return true;
|
2218 | }
|
2219 | else if (result === false) {
|
2220 | falseCount++;
|
2221 | }
|
2222 | }
|
2223 | if (falseCount === annotation.types.length) {
|
2224 | return false;
|
2225 | }
|
2226 | else {
|
2227 | return null;
|
2228 | }
|
2229 | case 'AnyTypeAnnotation':
|
2230 | case 'MixedTypeAnnotation':
|
2231 | case 'IntersectionTypeAnnotation':
|
2232 | return null;
|
2233 | default:
|
2234 | return false;
|
2235 | }
|
2236 | }
|
2237 |
|
2238 |
|
2239 | |
2240 |
|
2241 |
|
2242 |
|
2243 | function maybeFunctionAnnotation (annotation: TypeAnnotation): ?boolean {
|
2244 | switch (annotation.type) {
|
2245 | case 'TypeAnnotation':
|
2246 | case 'FunctionTypeParam':
|
2247 | case 'NullableTypeAnnotation':
|
2248 | return maybeFunctionAnnotation(annotation.typeAnnotation);
|
2249 | case 'FunctionTypeAnnotation':
|
2250 | return true;
|
2251 | case 'GenericTypeAnnotation':
|
2252 | switch (annotation.id.name) {
|
2253 | case 'Array':
|
2254 | case 'Number':
|
2255 | case 'Object':
|
2256 | case 'String':
|
2257 | case 'Boolean':
|
2258 | case 'Date':
|
2259 | case 'RegExp':
|
2260 | return false;
|
2261 | default:
|
2262 | return null;
|
2263 | }
|
2264 | case 'UnionTypeAnnotation':
|
2265 | let falseCount = 0;
|
2266 | for (let type of annotation.types) {
|
2267 | const result = maybeFunctionAnnotation(type);
|
2268 | if (result === true) {
|
2269 | return true;
|
2270 | }
|
2271 | else if (result === false) {
|
2272 | falseCount++;
|
2273 | }
|
2274 | }
|
2275 | if (falseCount === annotation.types.length) {
|
2276 | return false;
|
2277 | }
|
2278 | else {
|
2279 | return null;
|
2280 | }
|
2281 | case 'AnyTypeAnnotation':
|
2282 | case 'MixedTypeAnnotation':
|
2283 | case 'IntersectionTypeAnnotation':
|
2284 | return null;
|
2285 | default:
|
2286 | return false;
|
2287 | }
|
2288 | }
|
2289 |
|
2290 | |
2291 |
|
2292 |
|
2293 |
|
2294 | function maybeNullableAnnotation (annotation: TypeAnnotation): ?boolean {
|
2295 | switch (annotation.type) {
|
2296 | case 'NullableTypeAnnotation':
|
2297 | case 'VoidTypeAnnotation':
|
2298 | case 'MixedTypeAnnotation':
|
2299 | return true;
|
2300 | case 'TypeAnnotation':
|
2301 | case 'FunctionTypeParam':
|
2302 | return maybeNullableAnnotation(annotation.typeAnnotation);
|
2303 | case 'GenericTypeAnnotation':
|
2304 | switch (annotation.id.name) {
|
2305 | case 'Array':
|
2306 | case 'Number':
|
2307 | case 'Object':
|
2308 | case 'String':
|
2309 | case 'Boolean':
|
2310 | case 'Date':
|
2311 | case 'RegExp':
|
2312 | return false;
|
2313 | case 'Generator':
|
2314 | if (annotation.typeParameters && annotation.typeParameters.params.length > 1) {
|
2315 | return maybeNullableAnnotation(annotation.typeParameters.params[1]);
|
2316 | }
|
2317 | else {
|
2318 | return null;
|
2319 | }
|
2320 | default:
|
2321 | return null;
|
2322 | }
|
2323 | case 'UnionTypeAnnotation':
|
2324 | let falseCount = 0;
|
2325 | for (let type of annotation.types) {
|
2326 | const result = maybeNullableAnnotation(type);
|
2327 | if (result === true) {
|
2328 | return true;
|
2329 | }
|
2330 | else if (result === false) {
|
2331 | falseCount++;
|
2332 | }
|
2333 | }
|
2334 | if (falseCount === annotation.types.length) {
|
2335 | return false;
|
2336 | }
|
2337 | else {
|
2338 | return null;
|
2339 | }
|
2340 | default:
|
2341 | return false;
|
2342 | }
|
2343 | }
|
2344 |
|
2345 | |
2346 |
|
2347 |
|
2348 |
|
2349 | function maybeInstanceOfAnnotation (annotation: TypeAnnotation, expected: Identifier, typeParameters: TypeAnnotation[]): ?boolean {
|
2350 | switch (annotation.type) {
|
2351 | case 'TypeAnnotation':
|
2352 | case 'FunctionTypeParam':
|
2353 | case 'NullableTypeAnnotation':
|
2354 | return maybeInstanceOfAnnotation(annotation.typeAnnotation, expected, typeParameters);
|
2355 | case 'GenericTypeAnnotation':
|
2356 | if (annotation.id.name === expected.name) {
|
2357 | if (typeParameters.length === 0) {
|
2358 | return true;
|
2359 | }
|
2360 | if (annotation.typeParameters && annotation.typeParameters.params.length) {
|
2361 | let trueCount = 0;
|
2362 | let nullCount = 0;
|
2363 | for (let i = 0; i < typeParameters.length && i < annotation.typeParameters.params.length; i++) {
|
2364 | const result = compareAnnotations(typeParameters[i], annotation.typeParameters.params[i]);
|
2365 | if (result === false) {
|
2366 | return false;
|
2367 | }
|
2368 | else if (result === true) {
|
2369 | trueCount++;
|
2370 | }
|
2371 | else {
|
2372 | nullCount++;
|
2373 | }
|
2374 | }
|
2375 | return trueCount > 0 && nullCount === 0 ? true : null;
|
2376 | }
|
2377 | }
|
2378 | return null;
|
2379 | case 'UnionTypeAnnotation':
|
2380 | let falseCount = 0;
|
2381 | for (let type of annotation.types) {
|
2382 | const result = maybeInstanceOfAnnotation(type, expected, typeParameters);
|
2383 | if (result === true) {
|
2384 | return true;
|
2385 | }
|
2386 | else if (result === false) {
|
2387 | falseCount++;
|
2388 | }
|
2389 | }
|
2390 | if (falseCount === annotation.types.length) {
|
2391 | return false;
|
2392 | }
|
2393 | else {
|
2394 | return null;
|
2395 | }
|
2396 | case 'VoidTypeAnnotation':
|
2397 | case 'BooleanTypeAnnotation':
|
2398 | case 'BooleanLiteralTypeAnnotation':
|
2399 | case 'StringTypeAnnotation':
|
2400 | case 'StringLiteralTypeAnnotation':
|
2401 | case 'NumberTypeAnnotation':
|
2402 | case 'NumericLiteralTypeAnnotation':
|
2403 | case 'FunctionTypeAnnotation':
|
2404 | return false;
|
2405 | default:
|
2406 | return null;
|
2407 | }
|
2408 | }
|
2409 |
|
2410 | |
2411 |
|
2412 |
|
2413 |
|
2414 | function maybeArrayAnnotation (annotation: TypeAnnotation): ?boolean {
|
2415 | switch (annotation.type) {
|
2416 | case 'TypeAnnotation':
|
2417 | case 'FunctionTypeParam':
|
2418 | case 'NullableTypeAnnotation':
|
2419 | return maybeArrayAnnotation(annotation.typeAnnotation);
|
2420 | case 'TupleTypeAnnotation':
|
2421 | case 'ArrayTypeAnnotation':
|
2422 | return true;
|
2423 | case 'GenericTypeAnnotation':
|
2424 | return annotation.id.name === 'Array' ? true : null;
|
2425 | case 'UnionTypeAnnotation':
|
2426 | let falseCount = 0;
|
2427 | for (let type of annotation.types) {
|
2428 | const result = maybeArrayAnnotation(type);
|
2429 | if (result === true) {
|
2430 | return true;
|
2431 | }
|
2432 | else if (result === false) {
|
2433 | falseCount++;
|
2434 | }
|
2435 | }
|
2436 | if (falseCount === annotation.types.length) {
|
2437 | return false;
|
2438 | }
|
2439 | else {
|
2440 | return null;
|
2441 | }
|
2442 | case 'AnyTypeAnnotation':
|
2443 | case 'MixedTypeAnnotation':
|
2444 | case 'IntersectionTypeAnnotation':
|
2445 | return null;
|
2446 | default:
|
2447 | return false;
|
2448 | }
|
2449 | }
|
2450 |
|
2451 | |
2452 |
|
2453 |
|
2454 |
|
2455 | function maybeIterableAnnotation (annotation: TypeAnnotation): ?boolean {
|
2456 | switch (annotation.type) {
|
2457 | case 'TypeAnnotation':
|
2458 | case 'FunctionTypeParam':
|
2459 | case 'NullableTypeAnnotation':
|
2460 | return maybeIterableAnnotation(annotation.typeAnnotation);
|
2461 | case 'TupleTypeAnnotation':
|
2462 | case 'ArrayTypeAnnotation':
|
2463 | return true;
|
2464 | case 'GenericTypeAnnotation':
|
2465 | return annotation.id.name === 'Iterable' ? true : null;
|
2466 | case 'UnionTypeAnnotation':
|
2467 | let falseCount = 0;
|
2468 | for (let type of annotation.types) {
|
2469 | const result = maybeIterableAnnotation(type);
|
2470 | if (result === true) {
|
2471 | return true;
|
2472 | }
|
2473 | else if (result === false) {
|
2474 | falseCount++;
|
2475 | }
|
2476 | }
|
2477 | if (falseCount === annotation.types.length) {
|
2478 | return false;
|
2479 | }
|
2480 | else {
|
2481 | return null;
|
2482 | }
|
2483 | case 'BooleanTypeAnnotation':
|
2484 | case 'BooleanLiteralTypeAnnotation':
|
2485 | case 'NumericLiteralTypeAnnotation':
|
2486 | case 'NumberTypeAnnotation':
|
2487 | case 'VoidTypeAnnotation':
|
2488 | return false;
|
2489 | default:
|
2490 | return null;
|
2491 | }
|
2492 | }
|
2493 |
|
2494 | |
2495 |
|
2496 |
|
2497 |
|
2498 | function maybeTupleAnnotation (annotation: TypeAnnotation): ?boolean {
|
2499 | switch (annotation.type) {
|
2500 | case 'TypeAnnotation':
|
2501 | case 'FunctionTypeParam':
|
2502 | case 'NullableTypeAnnotation':
|
2503 | return maybeTupleAnnotation(annotation.typeAnnotation);
|
2504 | case 'TupleTypeAnnotation':
|
2505 | return true;
|
2506 | case 'UnionTypeAnnotation':
|
2507 | let falseCount = 0;
|
2508 | for (let type of annotation.types) {
|
2509 | const result = maybeTupleAnnotation(type);
|
2510 | if (result === true) {
|
2511 | return true;
|
2512 | }
|
2513 | else if (result === false) {
|
2514 | falseCount++;
|
2515 | }
|
2516 | }
|
2517 | if (falseCount === annotation.types.length) {
|
2518 | return false;
|
2519 | }
|
2520 | else {
|
2521 | return null;
|
2522 | }
|
2523 | case 'GenericTypeAnnotation':
|
2524 | case 'AnyTypeAnnotation':
|
2525 | case 'ArrayTypeAnnotation':
|
2526 | case 'MixedTypeAnnotation':
|
2527 | case 'IntersectionTypeAnnotation':
|
2528 | return null;
|
2529 | default:
|
2530 | return false;
|
2531 | }
|
2532 | }
|
2533 |
|
2534 | function humanReadableType (annotation: TypeAnnotation): string {
|
2535 | switch (annotation.type) {
|
2536 | case 'TypeAnnotation':
|
2537 | case 'FunctionTypeParam':
|
2538 | return humanReadableType(annotation.typeAnnotation);
|
2539 |
|
2540 | case 'FunctionTypeAnnotation':
|
2541 |
|
2542 | return `(${annotation.params.map(humanReadableType).join(', ')}) => ${humanReadableType(annotation.returnType)}`;
|
2543 | default:
|
2544 | return generate(annotation).code;
|
2545 | }
|
2546 | }
|
2547 |
|
2548 | function getTypeChecker (id: Identifier|QualifiedTypeIdentifier, scope: Scope): NodePath|false {
|
2549 | const binding = scope.getBinding(id.name);
|
2550 | if (binding === undefined) {
|
2551 | return false;
|
2552 | }
|
2553 | const {path} = binding;
|
2554 | if (path == null) {
|
2555 | return false;
|
2556 | }
|
2557 | else if (path.type === 'TypeAlias') {
|
2558 | return path;
|
2559 | }
|
2560 | else if (path.type === 'VariableDeclaration' && path.node.isTypeChecker) {
|
2561 | return path.get('declarations')[0];
|
2562 | }
|
2563 | else if (path.isImportSpecifier() && path.parent.importKind === 'type') {
|
2564 | return path;
|
2565 | }
|
2566 | return false;
|
2567 | }
|
2568 |
|
2569 | function isTypeChecker (id: Identifier|QualifiedTypeIdentifier, scope: Scope): boolean {
|
2570 | const binding = scope.getBinding(id.name);
|
2571 | if (binding === undefined) {
|
2572 | return false;
|
2573 | }
|
2574 | const {path} = binding;
|
2575 | if (path == null) {
|
2576 | return false;
|
2577 | }
|
2578 | else if (path.type === 'TypeAlias' || (path.type === 'VariableDeclaration' && path.node.isTypeChecker)) {
|
2579 | return true;
|
2580 | }
|
2581 | else if (path.isImportSpecifier() && path.parent.importKind === 'type') {
|
2582 | return true;
|
2583 | }
|
2584 | return false;
|
2585 | }
|
2586 |
|
2587 | function isPolymorphicType (id: Identifier|QualifiedTypeIdentifier, scope: Scope): boolean {
|
2588 | const binding = scope.getBinding(id.name);
|
2589 | if (binding !== undefined) {
|
2590 | return false;
|
2591 | }
|
2592 | let {path} = scope;
|
2593 | while (path && path.type !== 'Program') {
|
2594 | const {node} = path;
|
2595 | if ((t.isFunction(node) || t.isClass(node)) && node.typeParameters) {
|
2596 | for (let param of node.typeParameters.params) {
|
2597 | param.isPolymorphicType = true;
|
2598 | if (param.name === id.name) {
|
2599 | return true;
|
2600 | }
|
2601 | }
|
2602 | }
|
2603 | path = path.parentPath;
|
2604 | }
|
2605 | return false;
|
2606 | }
|
2607 |
|
2608 | function getPolymorphicType (id: Identifier|QualifiedTypeIdentifier, scope: Scope): ?Node {
|
2609 | const binding = scope.getBinding(id.name);
|
2610 | if (binding !== undefined) {
|
2611 | return false;
|
2612 | }
|
2613 | let {path} = scope;
|
2614 | while (path && path.type !== 'Program') {
|
2615 | const {node} = path;
|
2616 | if (t.isFunction(node) && node.typeParameters) {
|
2617 | for (let param of node.typeParameters.params) {
|
2618 | param.isPolymorphicType = true;
|
2619 | if (param.name === id.name) {
|
2620 | return param;
|
2621 | }
|
2622 | }
|
2623 | }
|
2624 | path = path.parent;
|
2625 | }
|
2626 | return null;
|
2627 | }
|
2628 |
|
2629 | function collectParamChecks (path: NodePath): Node[] {
|
2630 | return path.get('params').map((param) => {
|
2631 | const {node} = param;
|
2632 | if (node.type === 'AssignmentPattern') {
|
2633 | if (node.left.typeAnnotation) {
|
2634 | return createDefaultParamGuard(param);
|
2635 | }
|
2636 | }
|
2637 | else if (node.type === 'RestElement') {
|
2638 | if (node.typeAnnotation) {
|
2639 | return createRestParamGuard(param);
|
2640 | }
|
2641 | }
|
2642 | else if (node.typeAnnotation) {
|
2643 | return createParamGuard(param);
|
2644 | }
|
2645 | }).filter(identity);
|
2646 | }
|
2647 |
|
2648 | function createParamGuard (path: NodePath): ?Node {
|
2649 | const {node, scope} = path;
|
2650 |
|
2651 | node.hasBeenTypeChecked = true;
|
2652 | node.savedTypeAnnotation = node.typeAnnotation;
|
2653 | if (node.type === 'ObjectPattern') {
|
2654 | return;
|
2655 | }
|
2656 | let check = checkAnnotation(node, node.typeAnnotation, scope);
|
2657 | if (!check) {
|
2658 | return;
|
2659 | }
|
2660 | if (node.optional) {
|
2661 | check = t.logicalExpression(
|
2662 | '||',
|
2663 | checks.undefined({input: node}),
|
2664 | check
|
2665 | );
|
2666 | }
|
2667 | const message = paramTypeErrorMessage(node, scope);
|
2668 | return guard({
|
2669 | check,
|
2670 | message
|
2671 | });
|
2672 | }
|
2673 |
|
2674 | function createDefaultParamGuard (path: NodePath): ?Node {
|
2675 | const {node, scope} = path;
|
2676 | const {left: id, right: value} = node;
|
2677 | const ok = staticCheckAnnotation(path.get('right'), id.typeAnnotation);
|
2678 | if (ok === false) {
|
2679 | throw path.buildCodeFrameError(`Invalid default value for argument "${id.name}", expected ${humanReadableType(id.typeAnnotation)}.`);
|
2680 | }
|
2681 | return createParamGuard(path.get('left'));
|
2682 | }
|
2683 |
|
2684 | function createRestParamGuard (path: NodePath): ?Node {
|
2685 | const {node, scope} = path;
|
2686 | const {argument: id} = node;
|
2687 | id.hasBeenTypeChecked = true;
|
2688 | node.savedTypeAnnotation = node.typeAnnotation;
|
2689 | if (!isStrictlyArrayAnnotation(node.typeAnnotation)) {
|
2690 | throw path.buildCodeFrameError(`Invalid type annotation for rest argument "${id.name}", expected an Array, got: ${humanReadableType(node.typeAnnotation)}.`);
|
2691 | }
|
2692 | let check = checkAnnotation(id, node.typeAnnotation, scope);
|
2693 | if (!check) {
|
2694 | return;
|
2695 | }
|
2696 | if (node.optional) {
|
2697 | check = t.logicalExpression(
|
2698 | '||',
|
2699 | checks.undefined({input: id}),
|
2700 | check
|
2701 | );
|
2702 | }
|
2703 | const message = paramTypeErrorMessage(id, scope, node.typeAnnotation);
|
2704 | return guard({
|
2705 | check,
|
2706 | message
|
2707 | });
|
2708 | }
|
2709 |
|
2710 | function returnTypeErrorMessage (path: NodePath, fn: Node, id: ?Identifier|Literal): Node {
|
2711 | const {node, scope} = path;
|
2712 | const name = fn.id ? fn.id.name : '';
|
2713 | let annotation = fn.returnType;
|
2714 | if (annotation.type === 'TypeAnnotation') {
|
2715 | annotation = annotation.typeAnnotation;
|
2716 | }
|
2717 | if (fn.generator && isGeneratorAnnotation(annotation) && annotation.typeParameters && annotation.typeParameters.params.length > 1) {
|
2718 | annotation = annotation.typeParameters.params[1];
|
2719 | }
|
2720 | const message = `Function ${name ? `"${name}" ` : ''}return value violates contract, expected ${humanReadableType(annotation)} got `;
|
2721 |
|
2722 | return t.binaryExpression(
|
2723 | '+',
|
2724 | t.stringLiteral(message),
|
2725 | id ? readableName({input: id}) : node.argument ? readableName({input: node.argument}) : t.stringLiteral('undefined')
|
2726 | );
|
2727 | }
|
2728 |
|
2729 | function yieldTypeErrorMessage (fn: Node, annotation: TypeAnnotation, id: Identifier|Literal): Node {
|
2730 | const name = fn.id ? fn.id.name : '';
|
2731 | const message = `Function ${name ? `"${name}" ` : ''} yielded an invalid value, expected ${humanReadableType(annotation)} got `;
|
2732 |
|
2733 | return t.binaryExpression(
|
2734 | '+',
|
2735 | t.stringLiteral(message),
|
2736 | readableName({input: id})
|
2737 | );
|
2738 | }
|
2739 | function yieldNextTypeErrorMessage (fn: Node, annotation: TypeAnnotation, id: Identifier|Literal): Node {
|
2740 | const name = fn.id ? fn.id.name : '';
|
2741 | const message = `Generator ${name ? `"${name}" ` : ''}received an invalid next value, expected ${humanReadableType(annotation)} got `;
|
2742 |
|
2743 | return t.binaryExpression(
|
2744 | '+',
|
2745 | t.stringLiteral(message),
|
2746 | readableName({input: id})
|
2747 | );
|
2748 | }
|
2749 |
|
2750 | function paramTypeErrorMessage (node: Node, scope: Scope, typeAnnotation: TypeAnnotation = node.typeAnnotation): Node {
|
2751 | const name = node.name;
|
2752 | const message = `Value of ${node.optional ? 'optional ' : ''}argument "${name}" violates contract, expected ${humanReadableType(typeAnnotation)} got `;
|
2753 |
|
2754 | return t.binaryExpression(
|
2755 | '+',
|
2756 | t.stringLiteral(message),
|
2757 | readableName({input: node})
|
2758 | );
|
2759 | }
|
2760 |
|
2761 | function varTypeErrorMessage (node: Node, scope: Scope, annotation?: TypeAnnotation = node.typeAnnotation): Node {
|
2762 | if (node.type === 'Identifier') {
|
2763 | const name = node.name;
|
2764 | const message = `Value of variable "${name}" violates contract, expected ${humanReadableType(annotation)} got `;
|
2765 | return t.binaryExpression(
|
2766 | '+',
|
2767 | t.stringLiteral(message),
|
2768 | readableName({input: node})
|
2769 | );
|
2770 | }
|
2771 | else {
|
2772 | const message = `Value of "${generate(node).code}" violates contract, expected ${humanReadableType(annotation)} got `;
|
2773 | return t.binaryExpression(
|
2774 | '+',
|
2775 | t.stringLiteral(message),
|
2776 | readableName({input: node})
|
2777 | );
|
2778 | }
|
2779 | }
|
2780 |
|
2781 | |
2782 |
|
2783 |
|
2784 | function isBooleanExpression (node: Node) {
|
2785 | if (node.type === 'BinaryExpression' && BOOLEAN_BINARY_OPERATORS.indexOf(node.operator) > -1) {
|
2786 | return true;
|
2787 | }
|
2788 | else if (node.type === 'LogicalExpression') {
|
2789 | return isBooleanExpression(node.left) && isBooleanExpression(node.right);
|
2790 | }
|
2791 | else {
|
2792 | return false;
|
2793 | }
|
2794 | }
|
2795 |
|
2796 | |
2797 |
|
2798 |
|
2799 | function createTypeExpression (node: Node) : Object {
|
2800 | if (node.type == 'Identifier') {
|
2801 | return node;
|
2802 | }
|
2803 | else if (node.type == 'QualifiedTypeIdentifier') {
|
2804 | return t.memberExpression(
|
2805 | createTypeExpression(node.qualification),
|
2806 | createTypeExpression(node.id)
|
2807 | );
|
2808 | }
|
2809 |
|
2810 | throw this.errorWithNode(`Unsupported type: ${node.type}`);
|
2811 | }
|
2812 |
|
2813 | |
2814 |
|
2815 |
|
2816 | function getTypeName (node: Node): string {
|
2817 | if(node.type == 'Identifier') {
|
2818 | return node.name
|
2819 | }
|
2820 | else if(node.type == 'QualifiedTypeIdentifier') {
|
2821 | return getTypeName(node.qualification) + '.' + getTypeName(node.id);
|
2822 | }
|
2823 |
|
2824 | throw this.errorWithNode(`Unsupported type: ${node.type}`);
|
2825 | }
|
2826 |
|
2827 |
|
2828 | |
2829 |
|
2830 |
|
2831 | function union (arr1: Array, arr2: Array): Array {
|
2832 | for (let i = 0; i < arr2.length; i++) {
|
2833 | let item = arr2[i];
|
2834 | if (arr1.indexOf(item) === -1) {
|
2835 | arr1.push(item);
|
2836 | }
|
2837 | }
|
2838 | return arr1;
|
2839 | }
|
2840 |
|
2841 |
|
2842 | |
2843 |
|
2844 |
|
2845 | function allowsAny (annotation: TypeAnnotation): boolean {
|
2846 | if (annotation.type === 'TypeAnnotation' || annotation.type === 'NullableTypeAnnotation') {
|
2847 | return allowsAny(annotation.typeAnnotation);
|
2848 | }
|
2849 | else if (annotation.type === 'AnyTypeAnnotation' || annotation.type === 'MixedTypeAnnotation') {
|
2850 | return true;
|
2851 | }
|
2852 | else if (annotation.type === 'UnionTypeAnnotation') {
|
2853 | return annotation.types.some(allowsAny);
|
2854 | }
|
2855 | else {
|
2856 | return false;
|
2857 | }
|
2858 | }
|
2859 |
|
2860 | |
2861 |
|
2862 |
|
2863 | function isNodeNully (node: ?Node): boolean {
|
2864 | if (node == null) {
|
2865 | return true;
|
2866 | }
|
2867 | else if (node.type === 'Identifier' && node.name === 'undefined') {
|
2868 | return true;
|
2869 | }
|
2870 | else if (node.type === 'Literal' && node.value === null) {
|
2871 | return true;
|
2872 | }
|
2873 | else if (node.type === 'UnaryExpression' && node.operator === 'void') {
|
2874 | return true;
|
2875 | }
|
2876 | else {
|
2877 | return false;
|
2878 | }
|
2879 | }
|
2880 |
|
2881 | |
2882 |
|
2883 |
|
2884 | function maybeSkipFile (path: NodePath): boolean {
|
2885 | if (path.node.leadingComments && path.node.leadingComments.length) {
|
2886 | return path.node.leadingComments.some(comment => PRAGMA_IGNORE_FILE.test(comment.value));
|
2887 | }
|
2888 | return false;
|
2889 | }
|
2890 |
|
2891 | |
2892 |
|
2893 |
|
2894 | function maybeSkip (path: NodePath): boolean {
|
2895 | const {node} = path;
|
2896 | if (node.hasBeenTypeChecked) {
|
2897 | return true;
|
2898 | }
|
2899 | if (node.leadingComments && node.leadingComments.length) {
|
2900 | const comment = node.leadingComments[node.leadingComments.length - 1];
|
2901 | if (PRAGMA_IGNORE_STATEMENT.test(comment.value)) {
|
2902 | path.skip();
|
2903 | return true;
|
2904 | }
|
2905 | }
|
2906 | return false;
|
2907 | }
|
2908 |
|
2909 | |
2910 |
|
2911 |
|
2912 | function identity <T> (input: T): T {
|
2913 | return input;
|
2914 | }
|
2915 |
|
2916 | function getExpression (node: Node): Node {
|
2917 | return t.isExpressionStatement(node) ? node.expression : node;
|
2918 | }
|
2919 |
|
2920 | function expression (input: string): Function {
|
2921 | const fn: Function = template(input);
|
2922 | return function (...args) {
|
2923 | const node: Node = fn(...args);
|
2924 | return getExpression(node);
|
2925 | };
|
2926 | }
|
2927 | }
|