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Compile Elvis operator with Elvis operator

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This commit is contained in:
Jérôme Tamarelle
2023-10-21 19:08:22 +02:00
parent 51cfad8039
commit fb0d7495a8
2 changed files with 21 additions and 9 deletions
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src/ExpressionParser.php
+3
View File
@@ -183,11 +183,14 @@ class ExpressionParser
if (!$this->parser->getStream()->nextIf(/* Token::PUNCTUATION_TYPE */ 9, ':')) {
$expr2 = $this->parseExpression();
if ($this->parser->getStream()->nextIf(/* Token::PUNCTUATION_TYPE */ 9, ':')) {
// Ternary operator (expr ? expr2 : expr3)
$expr3 = $this->parseExpression();
} else {
// Ternary without else (expr ? expr2)
$expr3 = new ConstantExpression('', $this->parser->getCurrentToken()->getLine());
}
} else {
// Ternary without then (expr ?: expr3)
$expr2 = $expr;
$expr3 = $this->parseExpression();
}
src/Node/Expression/ConditionalExpression.php
+18 -9
View File
@@ -23,14 +23,23 @@ class ConditionalExpression extends AbstractExpression
public function compile(Compiler $compiler): void
{
$compiler
->raw('((')
->subcompile($this->getNode('expr1'))
->raw(') ? (')
->subcompile($this->getNode('expr2'))
->raw(') : (')
->subcompile($this->getNode('expr3'))
->raw('))')
;
// Ternary with no then uses Elvis operator
if ($this->getNode('expr1') === $this->getNode('expr2')) {
$compiler
->raw('((')
->subcompile($this->getNode('expr1'))
->raw(') ?: (')
->subcompile($this->getNode('expr3'))
->raw('))');
} else {
$compiler
->raw('((')
->subcompile($this->getNode('expr1'))
->raw(') ? (')
->subcompile($this->getNode('expr2'))
->raw(') : (')
->subcompile($this->getNode('expr3'))
->raw('))');
}
}
}