rfc:unicode_escape

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rfc:unicode_escape [2014/12/10 19:53] – v0.1.3 - ''\u'' without a following opening ''{'' passes through verbatim ajfrfc:unicode_escape [2014/12/14 02:53] – Update HHVM implementation pollita
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 This change would take place in a major version, so some level of backwards-compatibility breakage would be justified. In cases where it caused problems with existing code, fixing it could be done quite trivially by either switching to single-quoted strings, or escaping the backslash. This change would take place in a major version, so some level of backwards-compatibility breakage would be justified. In cases where it caused problems with existing code, fixing it could be done quite trivially by either switching to single-quoted strings, or escaping the backslash.
  
-In order to reduce backwards-compatibility issues, particularly with JSON in string literals, ''\u'' which is not followed by an opening ''{'' will pass through verbatim (instead of being interpreted as an escape sequence) and not raise an error. This means that existing code like 'json_decode("\"\u202e\"");'' will continue to work properly. On the other hand, ''"\u{foobar"'' will raise an error.+In order to reduce backwards-compatibility issues, particularly with JSON in string literals, ''\u'' which is not followed by an opening ''{'' will pass through verbatim (instead of being interpreted as an escape sequence) and not raise an error. This means that existing code like ''json_decode("\"\u202e\"");'' will continue to work properly. On the other hand, ''"\u{foobar"'' will raise an error.
  
 ===== Proposed PHP Version(s) ===== ===== Proposed PHP Version(s) =====
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 A language specification pull request with a patch and tests can be found here: https://github.com/php/php-langspec/pull/92 A language specification pull request with a patch and tests can be found here: https://github.com/php/php-langspec/pull/92
  
-Provisional HHVM implementation (includes name support): https://github.com/sgolemon/hhvm/compare/unicode-escape+Provisional HHVM implementation (includes name support): https://reviews.facebook.net/D30153
  
 ===== Implementation ===== ===== Implementation =====
rfc/unicode_escape.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1

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