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psalm/src/Psalm/Internal/Analyzer/Statements/Expression/EmptyAnalyzer.php

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2020-05-18 21:13:27 +02:00
<?php
namespace Psalm\Internal\Analyzer\Statements\Expression;
use PhpParser;
use Psalm\CodeLocation;
use Psalm\Context;
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use Psalm\Internal\Analyzer\StatementsAnalyzer;
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use Psalm\IssueBuffer;
use Psalm\Type;
class EmptyAnalyzer
{
public static function analyze(
StatementsAnalyzer $statements_analyzer,
PhpParser\Node\Expr\Empty_ $stmt,
Context $context
) : void {
IssetAnalyzer::analyzeIssetVar($statements_analyzer, $stmt->expr, $context);
if (($stmt_expr_type = $statements_analyzer->node_data->getType($stmt->expr))
&& $stmt_expr_type->hasBool()
&& $stmt_expr_type->isSingle()
&& !$stmt_expr_type->from_docblock
) {
if (IssueBuffer::accepts(
new \Psalm\Issue\InvalidArgument(
'Calling empty on a boolean value is almost certainly unintended',
new CodeLocation($statements_analyzer->getSource(), $stmt->expr),
'empty'
),
$statements_analyzer->getSuppressedIssues()
)) {
// fall through
}
}
$statements_analyzer->node_data->setType($stmt, Type::getBool());
}
}