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StaticVariableMisusePlugin.php
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StaticVariableMisusePlugin.php
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<?php
declare(strict_types=1);
use ast\Node;
use Phan\AST\ASTReverter;
use Phan\Issue;
use Phan\PluginV3;
use Phan\PluginV3\PluginAwarePostAnalysisVisitor;
use Phan\PluginV3\PostAnalyzeNodeCapability;
/**
* NOTE: This is automatically loaded by phan. Do not include it in a config.
*
* Checks for potentially misusing static variables
*/
final class StaticVariableMisusePlugin extends PluginV3 implements
PostAnalyzeNodeCapability
{
/**
* @return string - name of PluginAwarePostAnalysisVisitor subclass
*/
public static function getPostAnalyzeNodeVisitorClassName(): string
{
return StaticVariableMisuseVisitor::class;
}
}
/**
* Checks node kinds that can be used to access the inherited class
* for conflicts with uses of static variables.
*/
final class StaticVariableMisuseVisitor extends PluginAwarePostAnalysisVisitor
{
/**
* @override
*/
public function visitVar(Node $node): void
{
$name = $node->children['name'];
if ($name !== 'this') {
return;
}
$this->analyzeStaticAccessCommon($node);
}
/**
* @override
*/
public function visitName(Node $node): void
{
$context = $this->context;
if (!$context->isInClassScope() || !$context->isInFunctionLikeScope()) {
return;
}
$name = $node->children['name'];
if (!is_string($name)) {
return;
}
if (strcasecmp($name, 'static') !== 0) {
return;
}
$this->analyzeStaticAccessCommon($node);
}
private function analyzeStaticAccessCommon(Node $node): void
{
$context = $this->context;
if (!$context->isInClassScope() || !$context->isInFunctionLikeScope()) {
return;
}
$function = $context->getFunctionLikeInScope($this->code_base);
if (!$function->hasStaticVariable()) {
return;
}
$class = $context->getClassInScope($this->code_base);
if ($class->isFinal()) {
return;
}
$this->emitIssue(
Issue::StaticClassAccessWithStaticVariable,
$node->lineno,
ASTReverter::toShortString($node)
);
}
}
return new StaticVariableMisusePlugin();

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Wed, Aug 19, 10:39 (2 w, 6 d ago)
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StaticVariableMisusePlugin.php (2 KB)

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