1 | 'use strict';
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2 |
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3 | const configurationError = require('./configurationError');
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4 | const isSingleLineString = require('./isSingleLineString');
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5 | const isWhitespace = require('./isWhitespace');
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68 |
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69 | module.exports = function (targetWhitespace, expectation, messages) {
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70 |
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71 |
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72 |
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73 | |
74 |
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76 |
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77 |
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79 |
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80 |
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81 |
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82 |
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83 | let activeArgs;
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84 |
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85 | |
86 |
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87 |
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88 |
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89 | function before({
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90 | source,
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91 | index,
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92 | err,
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93 | errTarget,
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94 | lineCheckStr,
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95 | onlyOneChar = false,
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96 | allowIndentation = false,
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97 | }) {
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98 | activeArgs = {
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99 | source,
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100 | index,
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101 | err,
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102 | errTarget,
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103 | onlyOneChar,
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104 | allowIndentation,
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105 | };
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106 |
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107 | switch (expectation) {
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108 | case 'always':
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109 | expectBefore();
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110 | break;
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111 | case 'never':
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112 | rejectBefore();
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113 | break;
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114 | case 'always-single-line':
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115 | if (!isSingleLineString(lineCheckStr || source)) {
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116 | return;
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117 | }
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118 |
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119 | expectBefore(messages.expectedBeforeSingleLine);
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120 | break;
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121 | case 'never-single-line':
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122 | if (!isSingleLineString(lineCheckStr || source)) {
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123 | return;
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124 | }
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125 |
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126 | rejectBefore(messages.rejectedBeforeSingleLine);
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127 | break;
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128 | case 'always-multi-line':
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129 | if (isSingleLineString(lineCheckStr || source)) {
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130 | return;
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131 | }
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132 |
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133 | expectBefore(messages.expectedBeforeMultiLine);
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134 | break;
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135 | case 'never-multi-line':
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136 | if (isSingleLineString(lineCheckStr || source)) {
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137 | return;
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138 | }
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139 |
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140 | rejectBefore(messages.rejectedBeforeMultiLine);
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141 | break;
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142 | default:
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143 | throw configurationError(`Unknown expectation "${expectation}"`);
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144 | }
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145 | }
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146 |
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147 | |
148 |
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149 |
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150 |
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151 | function after({ source, index, err, errTarget, lineCheckStr, onlyOneChar = false }) {
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152 | activeArgs = { source, index, err, errTarget, onlyOneChar };
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153 |
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154 | switch (expectation) {
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155 | case 'always':
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156 | expectAfter();
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157 | break;
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158 | case 'never':
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159 | rejectAfter();
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160 | break;
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161 | case 'always-single-line':
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162 | if (!isSingleLineString(lineCheckStr || source)) {
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163 | return;
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164 | }
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165 |
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166 | expectAfter(messages.expectedAfterSingleLine);
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167 | break;
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168 | case 'never-single-line':
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169 | if (!isSingleLineString(lineCheckStr || source)) {
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170 | return;
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171 | }
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172 |
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173 | rejectAfter(messages.rejectedAfterSingleLine);
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174 | break;
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175 | case 'always-multi-line':
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176 | if (isSingleLineString(lineCheckStr || source)) {
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177 | return;
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178 | }
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179 |
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180 | expectAfter(messages.expectedAfterMultiLine);
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181 | break;
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182 | case 'never-multi-line':
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183 | if (isSingleLineString(lineCheckStr || source)) {
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184 | return;
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185 | }
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186 |
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187 | rejectAfter(messages.rejectedAfterMultiLine);
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188 | break;
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189 | default:
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190 | throw configurationError(`Unknown expectation "${expectation}"`);
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191 | }
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192 | }
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193 |
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194 | |
195 |
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196 |
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197 | function beforeAllowingIndentation(obj) {
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198 | before({ ...obj, allowIndentation: true });
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199 | }
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200 |
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201 | |
202 |
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203 |
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204 | function expectBefore(messageFunc = messages.expectedBefore) {
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205 | if (activeArgs.allowIndentation) {
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206 | expectBeforeAllowingIndentation(messageFunc);
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207 |
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208 | return;
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209 | }
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210 |
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211 | const _activeArgs = activeArgs;
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212 | const source = _activeArgs.source;
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213 | const index = _activeArgs.index;
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214 |
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215 | const oneCharBefore = source[index - 1];
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216 | const twoCharsBefore = source[index - 2];
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217 |
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218 | if (!isValue(oneCharBefore)) {
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219 | return;
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220 | }
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221 |
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222 | if (targetWhitespace === 'space' && oneCharBefore === ' ') {
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223 | if (activeArgs.onlyOneChar || !isWhitespace(twoCharsBefore)) {
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224 | return;
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225 | }
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226 | }
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227 |
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228 | activeArgs.err(messageFunc(activeArgs.errTarget ? activeArgs.errTarget : source[index]));
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229 | }
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230 |
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231 | |
232 |
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233 |
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234 | function expectBeforeAllowingIndentation(messageFunc = messages.expectedBefore) {
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235 | const _activeArgs2 = activeArgs;
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236 | const source = _activeArgs2.source;
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237 | const index = _activeArgs2.index;
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238 | const err = _activeArgs2.err;
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239 |
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240 | const expectedChar = (function () {
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241 | if (targetWhitespace === 'newline') {
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242 | return '\n';
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243 | }
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244 | })();
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245 | let i = index - 1;
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246 |
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247 | while (source[i] !== expectedChar) {
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248 | if (source[i] === '\t' || source[i] === ' ') {
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249 | i--;
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250 | continue;
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251 | }
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252 |
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253 | err(messageFunc(activeArgs.errTarget ? activeArgs.errTarget : source[index]));
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254 |
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255 | return;
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256 | }
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257 | }
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258 |
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259 | |
260 |
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261 |
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262 | function rejectBefore(messageFunc = messages.rejectedBefore) {
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263 | const _activeArgs3 = activeArgs;
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264 | const source = _activeArgs3.source;
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265 | const index = _activeArgs3.index;
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266 |
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267 | const oneCharBefore = source[index - 1];
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268 |
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269 | if (isValue(oneCharBefore) && isWhitespace(oneCharBefore)) {
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270 | activeArgs.err(messageFunc(activeArgs.errTarget ? activeArgs.errTarget : source[index]));
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271 | }
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272 | }
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273 |
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274 | |
275 |
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276 |
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277 | function afterOneOnly(obj) {
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278 | after({ ...obj, onlyOneChar: true });
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279 | }
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280 |
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281 | |
282 |
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283 |
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284 | function expectAfter(messageFunc = messages.expectedAfter) {
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285 | const _activeArgs4 = activeArgs;
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286 | const source = _activeArgs4.source;
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287 | const index = _activeArgs4.index;
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288 |
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289 | const oneCharAfter = source[index + 1];
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290 | const twoCharsAfter = source[index + 2];
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291 |
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292 | if (!isValue(oneCharAfter)) {
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293 | return;
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294 | }
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295 |
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296 | if (targetWhitespace === 'newline') {
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297 |
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298 | if (oneCharAfter === '\r' && twoCharsAfter === '\n') {
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299 | if (activeArgs.onlyOneChar || !isWhitespace(source[index + 3])) {
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300 | return;
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301 | }
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302 | }
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303 |
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304 |
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305 | if (oneCharAfter === '\n') {
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306 | if (activeArgs.onlyOneChar || !isWhitespace(twoCharsAfter)) {
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307 | return;
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308 | }
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309 | }
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310 | }
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311 |
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312 | if (targetWhitespace === 'space' && oneCharAfter === ' ') {
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313 | if (activeArgs.onlyOneChar || !isWhitespace(twoCharsAfter)) {
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314 | return;
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315 | }
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316 | }
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317 |
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318 | activeArgs.err(messageFunc(activeArgs.errTarget ? activeArgs.errTarget : source[index]));
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319 | }
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320 |
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321 | |
322 |
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323 |
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324 | function rejectAfter(messageFunc = messages.rejectedAfter) {
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325 | const _activeArgs5 = activeArgs;
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326 | const source = _activeArgs5.source;
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327 | const index = _activeArgs5.index;
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328 |
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329 | const oneCharAfter = source[index + 1];
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330 |
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331 | if (isValue(oneCharAfter) && isWhitespace(oneCharAfter)) {
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332 | activeArgs.err(messageFunc(activeArgs.errTarget ? activeArgs.errTarget : source[index]));
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333 | }
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334 | }
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335 |
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336 | return {
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337 | before,
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338 | beforeAllowingIndentation,
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339 | after,
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340 | afterOneOnly,
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341 | };
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342 | };
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343 |
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344 |
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345 |
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346 |
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347 | function isValue(x) {
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348 | return x !== undefined && x !== null;
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349 | }
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