diff options
Diffstat (limited to 'node_modules/core-js/modules/es6.regexp.split.js')
| -rw-r--r-- | node_modules/core-js/modules/es6.regexp.split.js | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/es6.regexp.split.js b/node_modules/core-js/modules/es6.regexp.split.js new file mode 100644 index 000000000..a991a3fc9 --- /dev/null +++ b/node_modules/core-js/modules/es6.regexp.split.js @@ -0,0 +1,70 @@ +// @@split logic +require('./_fix-re-wks')('split', 2, function(defined, SPLIT, $split){ + 'use strict'; + var isRegExp = require('./_is-regexp') + , _split = $split + , $push = [].push + , $SPLIT = 'split' + , LENGTH = 'length' + , LAST_INDEX = 'lastIndex'; + if( + 'abbc'[$SPLIT](/(b)*/)[1] == 'c' || + 'test'[$SPLIT](/(?:)/, -1)[LENGTH] != 4 || + 'ab'[$SPLIT](/(?:ab)*/)[LENGTH] != 2 || + '.'[$SPLIT](/(.?)(.?)/)[LENGTH] != 4 || + '.'[$SPLIT](/()()/)[LENGTH] > 1 || + ''[$SPLIT](/.?/)[LENGTH] + ){ + var NPCG = /()??/.exec('')[1] === undefined; // nonparticipating capturing group + // based on es5-shim implementation, need to rework it + $split = function(separator, limit){ + var string = String(this); + if(separator === undefined && limit === 0)return []; + // If `separator` is not a regex, use native split + if(!isRegExp(separator))return _split.call(string, separator, limit); + var output = []; + var flags = (separator.ignoreCase ? 'i' : '') + + (separator.multiline ? 'm' : '') + + (separator.unicode ? 'u' : '') + + (separator.sticky ? 'y' : ''); + var lastLastIndex = 0; + var splitLimit = limit === undefined ? 4294967295 : limit >>> 0; + // Make `global` and avoid `lastIndex` issues by working with a copy + var separatorCopy = new RegExp(separator.source, flags + 'g'); + var separator2, match, lastIndex, lastLength, i; + // Doesn't need flags gy, but they don't hurt + if(!NPCG)separator2 = new RegExp('^' + separatorCopy.source + '$(?!\\s)', flags); + while(match = separatorCopy.exec(string)){ + // `separatorCopy.lastIndex` is not reliable cross-browser + lastIndex = match.index + match[0][LENGTH]; + if(lastIndex > lastLastIndex){ + output.push(string.slice(lastLastIndex, match.index)); + // Fix browsers whose `exec` methods don't consistently return `undefined` for NPCG + if(!NPCG && match[LENGTH] > 1)match[0].replace(separator2, function(){ + for(i = 1; i < arguments[LENGTH] - 2; i++)if(arguments[i] === undefined)match[i] = undefined; + }); + if(match[LENGTH] > 1 && match.index < string[LENGTH])$push.apply(output, match.slice(1)); + lastLength = match[0][LENGTH]; + lastLastIndex = lastIndex; + if(output[LENGTH] >= splitLimit)break; + } + if(separatorCopy[LAST_INDEX] === match.index)separatorCopy[LAST_INDEX]++; // Avoid an infinite loop + } + if(lastLastIndex === string[LENGTH]){ + if(lastLength || !separatorCopy.test(''))output.push(''); + } else output.push(string.slice(lastLastIndex)); + return output[LENGTH] > splitLimit ? output.slice(0, splitLimit) : output; + }; + // Chakra, V8 + } else if('0'[$SPLIT](undefined, 0)[LENGTH]){ + $split = function(separator, limit){ + return separator === undefined && limit === 0 ? [] : _split.call(this, separator, limit); + }; + } + // 21.1.3.17 String.prototype.split(separator, limit) + return [function split(separator, limit){ + var O = defined(this) + , fn = separator == undefined ? undefined : separator[SPLIT]; + return fn !== undefined ? fn.call(separator, O, limit) : $split.call(String(O), separator, limit); + }, $split]; +});
\ No newline at end of file |