2020-05-19 18:56:23 +02:00
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<?php
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2021-12-15 04:58:32 +01:00
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2020-05-19 18:56:23 +02:00
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namespace Psalm\Internal\Analyzer\Statements;
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use PhpParser;
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2021-06-08 04:55:21 +02:00
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use Psalm\CodeLocation;
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use Psalm\Context;
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2020-05-19 18:56:23 +02:00
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use Psalm\Internal\Analyzer\FunctionLikeAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\Fetch\VariableFetchAnalyzer;
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2021-06-08 04:55:21 +02:00
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use Psalm\Internal\Analyzer\StatementsAnalyzer;
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2021-01-29 00:58:02 +01:00
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use Psalm\Internal\DataFlow\DataFlowNode;
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2021-12-03 20:11:20 +01:00
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use Psalm\Internal\ReferenceConstraint;
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2020-05-19 18:56:23 +02:00
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use Psalm\Issue\InvalidGlobal;
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use Psalm\IssueBuffer;
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2022-01-07 23:16:36 +01:00
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use RuntimeException;
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2021-06-08 04:55:21 +02:00
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2020-05-19 18:56:23 +02:00
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use function is_string;
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2022-01-03 07:55:32 +01:00
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/**
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* @internal
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*/
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2020-05-19 18:56:23 +02:00
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class GlobalAnalyzer
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{
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public static function analyze(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Stmt\Global_ $stmt,
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Context $context,
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?Context $global_context
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2021-12-05 18:51:26 +01:00
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): void {
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2020-05-19 18:56:23 +02:00
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if (!$context->collect_initializations && !$global_context) {
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2021-11-29 20:54:17 +01:00
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IssueBuffer::maybeAdd(
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2020-05-19 18:56:23 +02:00
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new InvalidGlobal(
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2022-02-18 18:36:25 +01:00
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'Cannot use global scope here (unless this file is included from a non-global scope)',
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2020-05-19 18:56:23 +02:00
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new CodeLocation($statements_analyzer, $stmt)
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),
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$statements_analyzer->getSource()->getSuppressedIssues()
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2021-11-29 20:54:17 +01:00
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);
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2020-05-19 18:56:23 +02:00
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}
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$source = $statements_analyzer->getSource();
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$function_storage = $source instanceof FunctionLikeAnalyzer
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? $source->getFunctionLikeStorage($statements_analyzer)
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: null;
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foreach ($stmt->vars as $var) {
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if ($var instanceof PhpParser\Node\Expr\Variable) {
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if (is_string($var->name)) {
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$var_id = '$' . $var->name;
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if ($var->name === 'argv' || $var->name === 'argc') {
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$context->vars_in_scope[$var_id] = VariableFetchAnalyzer::getGlobalType($var_id);
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} elseif (isset($function_storage->global_types[$var_id])) {
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$context->vars_in_scope[$var_id] = clone $function_storage->global_types[$var_id];
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$context->vars_possibly_in_scope[$var_id] = true;
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} else {
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$context->vars_in_scope[$var_id] =
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2020-09-30 18:28:13 +02:00
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$global_context && $global_context->hasVariable($var_id)
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2020-05-19 18:56:23 +02:00
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? clone $global_context->vars_in_scope[$var_id]
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: VariableFetchAnalyzer::getGlobalType($var_id);
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$context->vars_possibly_in_scope[$var_id] = true;
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2021-12-03 20:11:20 +01:00
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$context->byref_constraints[$var_id] = new ReferenceConstraint();
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2020-05-19 18:56:23 +02:00
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}
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2022-01-07 23:16:36 +01:00
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2021-01-29 00:58:02 +01:00
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$assignment_node = DataFlowNode::getForAssignment(
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$var_id,
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new CodeLocation($statements_analyzer, $var)
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);
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$context->vars_in_scope[$var_id]->parent_nodes = [
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$assignment_node->id => $assignment_node,
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];
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2022-01-07 23:16:36 +01:00
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$context->references_to_external_scope[$var_id] = true;
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if (isset($context->references_in_scope[$var_id])) {
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// Global shadows existing reference
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$reference_count = &$context->referenced_counts[$context->references_in_scope[$var_id]];
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if ($reference_count < 1) {
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throw new RuntimeException("Incorrect referenced count found");
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}
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--$reference_count;
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unset($context->references_in_scope[$var_id]);
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}
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2021-01-29 00:58:02 +01:00
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$statements_analyzer->registerVariable(
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$var_id,
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new CodeLocation($statements_analyzer, $var),
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$context->branch_point
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);
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$statements_analyzer->getCodebase()->analyzer->addNodeReference(
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$statements_analyzer->getFilePath(),
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$var,
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$var_id
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);
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2022-01-07 23:16:36 +01:00
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2022-01-26 19:54:42 +01:00
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if ($global_context !== null && $global_context->hasVariable($var_id)) {
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$global_context->referenced_globals[$var_id] = true;
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2022-01-07 23:16:36 +01:00
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}
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2020-05-19 18:56:23 +02:00
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}
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}
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}
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}
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}
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