rfc:integer_semantics
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| rfc:integer_semantics [2014/08/19 22:35] – clarity array keys ajf | rfc:integer_semantics [2014/09/14 22:46] – v0.2.2 - Added examples ajf | ||
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| ====== PHP RFC: Integer Semantics ====== | ====== PHP RFC: Integer Semantics ====== | ||
| - | * Version: 0.2.1 | + | * Version: 0.2.2 |
| * Date: 2014-08-19 | * Date: 2014-08-19 | ||
| * Author: Andrea Faulds < | * Author: Andrea Faulds < | ||
| - | * Status: | + | * Status: |
| * First Published at: http:// | * First Published at: http:// | ||
| Line 18: | Line 18: | ||
| - Left bitwise shifts by a number of bits beyond the bit width of an integer will always result in 0, even on CPUs which wrap around | - Left bitwise shifts by a number of bits beyond the bit width of an integer will always result in 0, even on CPUs which wrap around | ||
| - Right bitwise shifts by a number of bits beyond the bit width of an integer will always result in 0 or -1 (depending on sign), even on CPUs which wrap around | - Right bitwise shifts by a number of bits beyond the bit width of an integer will always result in 0 or -1 (depending on sign), even on CPUs which wrap around | ||
| + | |||
| + | ==== Examples ==== | ||
| + | |||
| + | For all " | ||
| + | |||
| + | <code php> | ||
| + | // Was: int(-9223372036854775808) | ||
| + | // Now: int(0) | ||
| + | var_dump((int)NAN); | ||
| + | // Was: int(-9223372036854775808) | ||
| + | // Now: int(0) | ||
| + | var_dump((int)INF); | ||
| + | // Was: int(4611686018427387904) | ||
| + | // Now: bool(false) and E_WARNING | ||
| + | var_dump(1 << -2); | ||
| + | // Was: int(8) | ||
| + | // Now: int(0) | ||
| + | var_dump(8 >> 64); | ||
| + | </ | ||
| ===== Rationale ===== | ===== Rationale ===== | ||
| Line 49: | Line 68: | ||
| ===== Patches and Tests ===== | ===== Patches and Tests ===== | ||
| - | A work-in-progress patch is here: https:// | + | A pull request |
| The patch is working and has tests, but code review would be appreciated. | The patch is working and has tests, but code review would be appreciated. | ||
| Line 58: | Line 77: | ||
| - a link to the git commit(s) | - a link to the git commit(s) | ||
| - a link to the PHP manual entry for the feature | - a link to the PHP manual entry for the feature | ||
| + | |||
| + | ===== Vote ===== | ||
| + | |||
| + | As this is a language change, a 2/3 majority is required. | ||
| + | |||
| + | Voting started 2014-09-14 and ends 2014-09-21. | ||
| + | |||
| + | <doodle title=" | ||
| + | * Yes | ||
| + | * No | ||
| + | </ | ||
| ===== References ===== | ===== References ===== | ||
| Line 68: | Line 98: | ||
| ===== Changelog ===== | ===== Changelog ===== | ||
| + | * v0.2.2 - Added examples | ||
| * v0.2.1 - Open Questions/ | * v0.2.1 - Open Questions/ | ||
| * v0.2 - Dropped zend_parse_parameters change, fixed left shift too | * v0.2 - Dropped zend_parse_parameters change, fixed left shift too | ||
| * v0.1.1 - Introduction added | * v0.1.1 - Introduction added | ||
| * v0.1 - Initial version | * v0.1 - Initial version | ||
rfc/integer_semantics.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1