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From an engine perspective, named parameters mainly add three concepts: * The SEND_* opcodes now accept a CONST op2, which is the argument name. For now, it is looked up by linear scan and runtime cached. * This may leave UNDEF arguments on the stack. To avoid having to deal with them in other places, a CHECK_UNDEF_ARGS opcode is used to either replace them with defaults, or error. * For variadic functions, EX(extra_named_params) are collected and need to be freed based on ZEND_CALL_HAS_EXTRA_NAMED_PARAMS. RFC: https://wiki.php.net/rfc/named_params Closes GH-5357.
24 lines
340 B
PHP
24 lines
340 B
PHP
--TEST--
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Duplicate param
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--FILE--
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<?php
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function test($a) {}
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try {
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test(a: 1, a: 2);
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} catch (Error $e) {
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echo $e->getMessage(), "\n";
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}
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try {
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test(1, a: 2);
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} catch (Error $e) {
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echo $e->getMessage(), "\n";
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}
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?>
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--EXPECT--
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Named parameter $a overwrites previous argument
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Named parameter $a overwrites previous argument
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