rfc:argument_unpacking
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rfc:argument_unpacking [2013/12/21 12:44] – one more example nikic | rfc:argument_unpacking [2014/07/31 20:32] – fix now invalid code nikic | ||
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* Date: 2013-08-30 | * Date: 2013-08-30 | ||
* Author: Nikita Popov < | * Author: Nikita Popov < | ||
- | * Status: | + | * Status: |
- | * Proposed for: PHP 5.6 | + | |
* Patch: https:// | * Patch: https:// | ||
* Mailing list discussion: http:// | * Mailing list discussion: http:// | ||
Line 40: | Line 39: | ||
</ | </ | ||
- | It's possible to use '' | + | It's possible to use '' |
<code php> | <code php> | ||
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test(...$args1, | test(...$args1, | ||
test(1, 2, 3, ...$args2); | test(1, 2, 3, ...$args2); | ||
- | test(...$args1, | + | </ |
+ | |||
+ | However, it is not possible to use normal arguments after argument unpacking was used. Both of the following are invalid: | ||
+ | |||
+ | <code php> | ||
+ | test(...$args1, | ||
+ | test(...$args1, 4, 5, 6, ...$args2); | ||
</ | </ | ||
Line 75: | Line 80: | ||
<code php> | <code php> | ||
- | var_dump(1, 2, ...null, 3, 4); | + | var_dump(1, 2, ...null, |
// Warning: Only arrays and Traversables can be unpacked | // Warning: Only arrays and Traversables can be unpacked | ||
// int(1) int(2) int(3) int(4) | // int(1) int(2) int(3) int(4) | ||
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</ | </ | ||
- | ==== Normal arguments after unpacked arguments | + | ===== Patch ===== |
- | Some people also had doubts regarding the usefulness of allowing '' | + | The patch for this features is available as a PR: https:// |
- | One use-case for this pattern are the variants of '' | + | ===== Vote ===== |
- | <code php> | + | As this is a language change a two third majority is required. |
- | array_udiff(...$arrays, $valueCmpFunction); | + | |
- | array_udiff_uassoc(...$arrays, | + | |
- | </ | + | |
- | While this kind of API was undoubtedly a bad choice in the first place, I see little reason not to support calls to them. | + | Voting started 2013-12-21 and ended 2014-01-11. |
- | Another use case is appending one additional | + | <doodle title=" |
- | + | * Yes | |
- | <code php> | + | * No |
- | $this-> | + | </doodle> |
- | </ | + | |
- | + | ||
- | ===== Patch ===== | + | |
- | + | ||
- | The patch for this features is available as a PR: https:// | + | |
===== Support in other languages ===== | ===== Support in other languages ===== |
rfc/argument_unpacking.txt · Last modified: 2017/09/22 13:28 by 127.0.0.1