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<?php |
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namespace PHPSA\Compiler\Expression\Operators; |
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use PhpParser\Node\Name; |
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use PHPSA\CompiledExpression; |
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use PHPSA\Context; |
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use PHPSA\Compiler\Expression; |
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use PHPSA\Compiler\Expression\AbstractExpressionCompiler; |
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class PreDec extends AbstractExpressionCompiler |
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{ |
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protected $name = 'PhpParser\Node\Expr\PreDec'; |
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/** |
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* --{expr} |
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* |
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* @param \PhpParser\Node\Expr\PreDec $expr |
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* @param Context $context |
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* @return CompiledExpression |
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*/ |
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protected function compile($expr, Context $context) |
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{ |
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if ($expr->var instanceof \PHPParser\Node\Expr\Variable) { |
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$variableName = $expr->var->name; |
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if ($variableName instanceof Name) { |
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$variableName = $variableName->parts[0]; |
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} |
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$variable = $context->getSymbol($variableName); |
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if ($variable) { |
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$variable->incUse(); |
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switch ($variable->getType()) { |
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case CompiledExpression::INTEGER: |
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case CompiledExpression::DOUBLE: |
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case CompiledExpression::NUMBER: |
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$variable->dec(); |
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return CompiledExpression::fromZvalValue($variable->getValue()); |
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} |
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$context->notice( |
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'predec.variable.wrong-type', |
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'You are trying to use pre decrement operator on variable $' . $variableName . |
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' with type: ' . $variable->getTypeName(), |
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$expr |
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); |
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} else { |
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$context->notice( |
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'predec.undefined-variable', |
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'You are trying to use pre decrement operator on undefined variable: ' . $variableName, |
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$expr |
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); |
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} |
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return new CompiledExpression(CompiledExpression::UNKNOWN); |
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} |
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$compiledExpression = $context->getExpressionCompiler()->compile($expr->var); |
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switch ($compiledExpression->getType()) { |
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case CompiledExpression::INTEGER: |
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case CompiledExpression::DOUBLE: |
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case CompiledExpression::NUMBER: |
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$value = $compiledExpression->getValue(); |
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return CompiledExpression::fromZvalValue(--$value); |
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} |
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return new CompiledExpression(CompiledExpression::UNKNOWN); |
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} |
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} |
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ovr /
phpsa
