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44 | "use strict";
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45 |
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46 | function TreeTransformer(before, after) {
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47 | TreeWalker.call(this);
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48 | this.before = before;
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49 | this.after = after;
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50 | }
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51 | TreeTransformer.prototype = new TreeWalker;
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52 |
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53 | (function(DEF) {
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54 | function do_list(list, tw) {
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55 | return List(list, function(node) {
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56 | return node.transform(tw, true);
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57 | });
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58 | }
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59 |
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60 | DEF(AST_Node, noop);
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61 | DEF(AST_LabeledStatement, function(self, tw) {
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62 | self.label = self.label.transform(tw);
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63 | self.body = self.body.transform(tw);
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64 | });
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65 | DEF(AST_SimpleStatement, function(self, tw) {
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66 | self.body = self.body.transform(tw);
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67 | });
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68 | DEF(AST_Block, function(self, tw) {
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69 | self.body = do_list(self.body, tw);
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70 | });
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71 | DEF(AST_Do, function(self, tw) {
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72 | self.body = self.body.transform(tw);
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73 | self.condition = self.condition.transform(tw);
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74 | });
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75 | DEF(AST_While, function(self, tw) {
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76 | self.condition = self.condition.transform(tw);
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77 | self.body = self.body.transform(tw);
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78 | });
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79 | DEF(AST_For, function(self, tw) {
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80 | if (self.init) self.init = self.init.transform(tw);
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81 | if (self.condition) self.condition = self.condition.transform(tw);
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82 | if (self.step) self.step = self.step.transform(tw);
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83 | self.body = self.body.transform(tw);
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84 | });
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85 | DEF(AST_ForEnumeration, function(self, tw) {
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86 | self.init = self.init.transform(tw);
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87 | self.object = self.object.transform(tw);
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88 | self.body = self.body.transform(tw);
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89 | });
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90 | DEF(AST_With, function(self, tw) {
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91 | self.expression = self.expression.transform(tw);
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92 | self.body = self.body.transform(tw);
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93 | });
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94 | DEF(AST_Exit, function(self, tw) {
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95 | if (self.value) self.value = self.value.transform(tw);
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96 | });
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97 | DEF(AST_LoopControl, function(self, tw) {
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98 | if (self.label) self.label = self.label.transform(tw);
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99 | });
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100 | DEF(AST_If, function(self, tw) {
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101 | self.condition = self.condition.transform(tw);
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102 | self.body = self.body.transform(tw);
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103 | if (self.alternative) self.alternative = self.alternative.transform(tw);
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104 | });
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105 | DEF(AST_Switch, function(self, tw) {
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106 | self.expression = self.expression.transform(tw);
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107 | self.body = do_list(self.body, tw);
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108 | });
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109 | DEF(AST_Case, function(self, tw) {
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110 | self.expression = self.expression.transform(tw);
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111 | self.body = do_list(self.body, tw);
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112 | });
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113 | DEF(AST_Try, function(self, tw) {
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114 | self.body = do_list(self.body, tw);
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115 | if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
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116 | if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
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117 | });
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118 | DEF(AST_Catch, function(self, tw) {
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119 | if (self.argname) self.argname = self.argname.transform(tw);
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120 | self.body = do_list(self.body, tw);
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121 | });
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122 | DEF(AST_Definitions, function(self, tw) {
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123 | self.definitions = do_list(self.definitions, tw);
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124 | });
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125 | DEF(AST_VarDef, function(self, tw) {
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126 | self.name = self.name.transform(tw);
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127 | if (self.value) self.value = self.value.transform(tw);
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128 | });
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129 | DEF(AST_DefaultValue, function(self, tw) {
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130 | self.name = self.name.transform(tw);
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131 | self.value = self.value.transform(tw);
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132 | });
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133 | DEF(AST_Lambda, function(self, tw) {
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134 | if (self.name) self.name = self.name.transform(tw);
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135 | self.argnames = do_list(self.argnames, tw);
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136 | if (self.rest) self.rest = self.rest.transform(tw);
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137 | self.body = do_list(self.body, tw);
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138 | });
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139 | function transform_arrow(self, tw) {
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140 | self.argnames = do_list(self.argnames, tw);
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141 | if (self.rest) self.rest = self.rest.transform(tw);
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142 | if (self.value) {
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143 | self.value = self.value.transform(tw);
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144 | } else {
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145 | self.body = do_list(self.body, tw);
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146 | }
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147 | }
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148 | DEF(AST_Arrow, transform_arrow);
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149 | DEF(AST_AsyncArrow, transform_arrow);
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150 | DEF(AST_Class, function(self, tw) {
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151 | if (self.name) self.name = self.name.transform(tw);
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152 | if (self.extends) self.extends = self.extends.transform(tw);
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153 | self.properties = do_list(self.properties, tw);
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154 | });
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155 | DEF(AST_ClassProperty, function(self, tw) {
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156 | if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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157 | if (self.value) self.value = self.value.transform(tw);
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158 | });
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159 | DEF(AST_Call, function(self, tw) {
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160 | self.expression = self.expression.transform(tw);
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161 | self.args = do_list(self.args, tw);
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162 | });
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163 | DEF(AST_Sequence, function(self, tw) {
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164 | self.expressions = do_list(self.expressions, tw);
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165 | });
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166 | DEF(AST_Await, function(self, tw) {
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167 | self.expression = self.expression.transform(tw);
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168 | });
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169 | DEF(AST_Yield, function(self, tw) {
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170 | if (self.expression) self.expression = self.expression.transform(tw);
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171 | });
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172 | DEF(AST_Dot, function(self, tw) {
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173 | self.expression = self.expression.transform(tw);
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174 | });
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175 | DEF(AST_Sub, function(self, tw) {
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176 | self.expression = self.expression.transform(tw);
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177 | self.property = self.property.transform(tw);
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178 | });
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179 | DEF(AST_Spread, function(self, tw) {
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180 | self.expression = self.expression.transform(tw);
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181 | });
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182 | DEF(AST_Unary, function(self, tw) {
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183 | self.expression = self.expression.transform(tw);
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184 | });
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185 | DEF(AST_Binary, function(self, tw) {
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186 | self.left = self.left.transform(tw);
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187 | self.right = self.right.transform(tw);
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188 | });
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189 | DEF(AST_Conditional, function(self, tw) {
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190 | self.condition = self.condition.transform(tw);
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191 | self.consequent = self.consequent.transform(tw);
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192 | self.alternative = self.alternative.transform(tw);
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193 | });
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194 | DEF(AST_Array, function(self, tw) {
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195 | self.elements = do_list(self.elements, tw);
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196 | });
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197 | DEF(AST_DestructuredArray, function(self, tw) {
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198 | self.elements = do_list(self.elements, tw);
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199 | if (self.rest) self.rest = self.rest.transform(tw);
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200 | });
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201 | DEF(AST_DestructuredKeyVal, function(self, tw) {
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202 | if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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203 | self.value = self.value.transform(tw);
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204 | });
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205 | DEF(AST_DestructuredObject, function(self, tw) {
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206 | self.properties = do_list(self.properties, tw);
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207 | if (self.rest) self.rest = self.rest.transform(tw);
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208 | });
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209 | DEF(AST_Object, function(self, tw) {
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210 | self.properties = do_list(self.properties, tw);
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211 | });
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212 | DEF(AST_ObjectProperty, function(self, tw) {
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213 | if (self.key instanceof AST_Node) self.key = self.key.transform(tw);
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214 | self.value = self.value.transform(tw);
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215 | });
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216 | DEF(AST_ExportDeclaration, function(self, tw) {
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217 | self.body = self.body.transform(tw);
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218 | });
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219 | DEF(AST_ExportDefault, function(self, tw) {
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220 | self.body = self.body.transform(tw);
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221 | });
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222 | DEF(AST_ExportReferences, function(self, tw) {
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223 | self.properties = do_list(self.properties, tw);
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224 | });
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225 | DEF(AST_Import, function(self, tw) {
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226 | if (self.all) self.all = self.all.transform(tw);
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227 | if (self.default) self.default = self.default.transform(tw);
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228 | if (self.properties) self.properties = do_list(self.properties, tw);
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229 | });
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230 | DEF(AST_Template, function(self, tw) {
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231 | if (self.tag) self.tag = self.tag.transform(tw);
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232 | self.expressions = do_list(self.expressions, tw);
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233 | });
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234 | })(function(node, descend) {
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235 | node.DEFMETHOD("transform", function(tw, in_list) {
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236 | var x, y;
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237 | tw.push(this);
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238 | if (tw.before) x = tw.before(this, descend, in_list);
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239 | if (typeof x === "undefined") {
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240 | x = this;
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241 | descend(x, tw);
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242 | if (tw.after) {
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243 | y = tw.after(x, in_list);
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244 | if (typeof y !== "undefined") x = y;
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245 | }
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246 | }
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247 | tw.pop();
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248 | return x;
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249 | });
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250 | });
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