| // Copyright (C) 2019 Leo Balter. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-string.prototype.replaceall |
| description: > |
| Replacement Text Symbol Substitutions ($<) |
| info: | |
| String.prototype.replaceAll ( searchValue, replaceValue ) |
| |
| 10. Let position be ! StringIndexOf(string, searchString, 0). |
| 11. Repeat, while position is not -1 |
| a. Append position to the end of matchPositions. |
| b. Let position be ! StringIndexOf(string, searchString, position + advanceBy). |
| ... |
| 14. For each position in matchPositions, do |
| a. If functionalReplace is true, then |
| ... |
| b. Else, |
| ... |
| ii. Let captures be a new empty List. |
| iii. Let replacement be GetSubstitution(searchString, string, position, captures, undefined, replaceValue). |
| |
| StringIndexOf ( string, searchValue, fromIndex ) |
| |
| ... |
| 4. Let len be the length of string. |
| 5. If searchValue is the empty string, and fromIndex <= len, return fromIndex. |
| 6. Let searchLen be the length of searchValue. |
| 7. If there exists any integer k such that fromIndex ≤ k ≤ len - searchLen and for all nonnegative integers j less than searchLen, the code unit at index k + j within string is the same as the code unit at index j within searchValue, let pos be the smallest (closest to -∞) such integer. Otherwise, let pos be -1. |
| 8. Return pos. |
| |
| Runtime Semantics: GetSubstitution ( matched, str, position, captures, namedCaptures, replacement ) |
| |
| ... |
| 2. Let matchLength be the number of code units in matched. |
| ... |
| 4. Let stringLength be the number of code units in str. |
| ... |
| 9. Let tailPos be position + matchLength. |
| 10. Let m be the number of elements in captures. |
| 11. Let result be the String value derived from replacement by copying code unit elements from replacement to result while performing replacements as specified in Table 53. These $ replacements are done left-to-right, and, once such a replacement is performed, the new replacement text is not subject to further replacements. |
| 12 Return result. |
| |
| Table 53: Replacement Text Symbol Substitutions |
| ... |
| |
| $< |
| 1. If namedCaptures is undefined, the replacement text is the String "$<". |
| ... |
| features: [String.prototype.replaceAll, Symbol.replace] |
| ---*/ |
| |
| var str = 'aaaaaaaaaaaaaaaa aaaaaaaa aaaaaaaaaaaaaaaa'; |
| |
| var result; |
| |
| // captures is always an empty list if GetSubstitution is called from the string value of SearchValue |
| |
| result = str.replaceAll('a', '$<'); |
| assert.sameValue(result, '$<$<$<$<$<$<$<$<$<$<$<$<$<$<$<$< $<$<$<$<$<$<$<$< $<$<$<$<$<$<$<$<$<$<$<$<$<$<$<$<'); |
| |
| var customRE = /./g; |
| |
| Object.defineProperty(customRE, Symbol.replace, { |
| value: undefined |
| }); |
| |
| result = '------------------- /./g -------/./g'.replaceAll(customRE, 'a($<$<)'); |
| assert.sameValue(result, '------------------- a($<$<) -------a($<$<)'); |
| |