[RFC] Implement match blocks #11933
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[RFC] Implement match blocks #11933
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TimWolla
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Aug 25, 2023
| }); | ||
| ?> | ||
| --EXPECTF-- | ||
| Fatal error: 'goto' into loop or switch statement is disallowed in %s on line %d |
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The error message should mention “match”.
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xepozz
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| --FILE-- | ||
| <?php | ||
| $x = null; | ||
| $y = $x ?? { |
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Is
$x = {
echo "test\n";
null
};also possible?
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No, not in this PR. Please read the RFC, the rationale is explained there. https://wiki.php.net/rfc/match_blocks#why_not_language-level_blocks
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https://wiki.php.net/rfc/match_blocks
throwstatements non-terminators in match blocks. Alternatively, [WIP] Auto-extend live-ranges #11880.;is subtle. We could do<= $valueor some other symbol. The downside is that people may expect this to work anywhere in the block, which is currently not the case. The result must appear at the end of the block. Edit: I've settled on<-and=>for now. I picked<-over<=because ligatures often render<=as ≤.This is a much simpler alternative to master...iluuu1994:php-src:match-blocks-var-tracking, which allowed
return,break,continue, andgotoout of match expression blocks. This PR disallows escaping match blocks whose result value is used. This avoids tracking VARs that may have to be freed if an expression is escaped midway.