258 lines
9.4 KiB
PHP
258 lines
9.4 KiB
PHP
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<?php declare(strict_types=1);
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namespace PhpParser\NodeVisitor;
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use PhpParser\ErrorHandler;
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use PhpParser\NameContext;
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use PhpParser\Node;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Name;
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use PhpParser\Node\Name\FullyQualified;
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use PhpParser\Node\Stmt;
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use PhpParser\NodeVisitorAbstract;
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class NameResolver extends NodeVisitorAbstract
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{
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/** @var NameContext Naming context */
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protected $nameContext;
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/** @var bool Whether to preserve original names */
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protected $preserveOriginalNames;
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/** @var bool Whether to replace resolved nodes in place, or to add resolvedNode attributes */
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protected $replaceNodes;
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/**
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* Constructs a name resolution visitor.
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*
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* Options:
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* * preserveOriginalNames (default false): An "originalName" attribute will be added to
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* all name nodes that underwent resolution.
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* * replaceNodes (default true): Resolved names are replaced in-place. Otherwise, a
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* resolvedName attribute is added. (Names that cannot be statically resolved receive a
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* namespacedName attribute, as usual.)
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*
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* @param ErrorHandler|null $errorHandler Error handler
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* @param array $options Options
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*/
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public function __construct(ErrorHandler $errorHandler = null, array $options = []) {
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$this->nameContext = new NameContext($errorHandler ?? new ErrorHandler\Throwing);
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$this->preserveOriginalNames = $options['preserveOriginalNames'] ?? false;
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$this->replaceNodes = $options['replaceNodes'] ?? true;
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}
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/**
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* Get name resolution context.
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*
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* @return NameContext
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*/
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public function getNameContext() : NameContext {
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return $this->nameContext;
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}
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public function beforeTraverse(array $nodes) {
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$this->nameContext->startNamespace();
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return null;
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}
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public function enterNode(Node $node) {
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if ($node instanceof Stmt\Namespace_) {
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$this->nameContext->startNamespace($node->name);
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} elseif ($node instanceof Stmt\Use_) {
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foreach ($node->uses as $use) {
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$this->addAlias($use, $node->type, null);
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}
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} elseif ($node instanceof Stmt\GroupUse) {
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foreach ($node->uses as $use) {
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$this->addAlias($use, $node->type, $node->prefix);
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}
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} elseif ($node instanceof Stmt\Class_) {
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if (null !== $node->extends) {
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$node->extends = $this->resolveClassName($node->extends);
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}
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foreach ($node->implements as &$interface) {
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$interface = $this->resolveClassName($interface);
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}
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$this->resolveAttrGroups($node);
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if (null !== $node->name) {
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$this->addNamespacedName($node);
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}
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} elseif ($node instanceof Stmt\Interface_) {
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foreach ($node->extends as &$interface) {
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$interface = $this->resolveClassName($interface);
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}
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$this->resolveAttrGroups($node);
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$this->addNamespacedName($node);
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} elseif ($node instanceof Stmt\Enum_) {
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foreach ($node->implements as &$interface) {
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$interface = $this->resolveClassName($interface);
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}
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$this->resolveAttrGroups($node);
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if (null !== $node->name) {
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$this->addNamespacedName($node);
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}
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} elseif ($node instanceof Stmt\Trait_) {
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$this->resolveAttrGroups($node);
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$this->addNamespacedName($node);
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} elseif ($node instanceof Stmt\Function_) {
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$this->resolveSignature($node);
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$this->resolveAttrGroups($node);
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$this->addNamespacedName($node);
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} elseif ($node instanceof Stmt\ClassMethod
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|| $node instanceof Expr\Closure
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|| $node instanceof Expr\ArrowFunction
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) {
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$this->resolveSignature($node);
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$this->resolveAttrGroups($node);
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} elseif ($node instanceof Stmt\Property) {
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if (null !== $node->type) {
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$node->type = $this->resolveType($node->type);
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}
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$this->resolveAttrGroups($node);
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} elseif ($node instanceof Stmt\Const_) {
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foreach ($node->consts as $const) {
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$this->addNamespacedName($const);
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}
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} else if ($node instanceof Stmt\ClassConst) {
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$this->resolveAttrGroups($node);
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} else if ($node instanceof Stmt\EnumCase) {
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$this->resolveAttrGroups($node);
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} elseif ($node instanceof Expr\StaticCall
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|| $node instanceof Expr\StaticPropertyFetch
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|| $node instanceof Expr\ClassConstFetch
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|| $node instanceof Expr\New_
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|| $node instanceof Expr\Instanceof_
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) {
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if ($node->class instanceof Name) {
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$node->class = $this->resolveClassName($node->class);
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}
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} elseif ($node instanceof Stmt\Catch_) {
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foreach ($node->types as &$type) {
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$type = $this->resolveClassName($type);
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}
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} elseif ($node instanceof Expr\FuncCall) {
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if ($node->name instanceof Name) {
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$node->name = $this->resolveName($node->name, Stmt\Use_::TYPE_FUNCTION);
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}
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} elseif ($node instanceof Expr\ConstFetch) {
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$node->name = $this->resolveName($node->name, Stmt\Use_::TYPE_CONSTANT);
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} elseif ($node instanceof Stmt\TraitUse) {
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foreach ($node->traits as &$trait) {
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$trait = $this->resolveClassName($trait);
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}
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foreach ($node->adaptations as $adaptation) {
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if (null !== $adaptation->trait) {
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$adaptation->trait = $this->resolveClassName($adaptation->trait);
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}
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if ($adaptation instanceof Stmt\TraitUseAdaptation\Precedence) {
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foreach ($adaptation->insteadof as &$insteadof) {
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$insteadof = $this->resolveClassName($insteadof);
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}
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}
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}
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}
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return null;
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}
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private function addAlias(Stmt\UseUse $use, $type, Name $prefix = null) {
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// Add prefix for group uses
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$name = $prefix ? Name::concat($prefix, $use->name) : $use->name;
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// Type is determined either by individual element or whole use declaration
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$type |= $use->type;
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$this->nameContext->addAlias(
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$name, (string) $use->getAlias(), $type, $use->getAttributes()
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);
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}
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/** @param Stmt\Function_|Stmt\ClassMethod|Expr\Closure $node */
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private function resolveSignature($node) {
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foreach ($node->params as $param) {
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$param->type = $this->resolveType($param->type);
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$this->resolveAttrGroups($param);
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}
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$node->returnType = $this->resolveType($node->returnType);
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}
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private function resolveType($node) {
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if ($node instanceof Name) {
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return $this->resolveClassName($node);
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}
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if ($node instanceof Node\NullableType) {
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$node->type = $this->resolveType($node->type);
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return $node;
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}
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if ($node instanceof Node\UnionType || $node instanceof Node\IntersectionType) {
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foreach ($node->types as &$type) {
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$type = $this->resolveType($type);
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}
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return $node;
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}
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return $node;
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}
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/**
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* Resolve name, according to name resolver options.
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*
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* @param Name $name Function or constant name to resolve
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* @param int $type One of Stmt\Use_::TYPE_*
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*
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* @return Name Resolved name, or original name with attribute
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*/
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protected function resolveName(Name $name, int $type) : Name {
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if (!$this->replaceNodes) {
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$resolvedName = $this->nameContext->getResolvedName($name, $type);
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if (null !== $resolvedName) {
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$name->setAttribute('resolvedName', $resolvedName);
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} else {
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$name->setAttribute('namespacedName', FullyQualified::concat(
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$this->nameContext->getNamespace(), $name, $name->getAttributes()));
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}
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return $name;
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}
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if ($this->preserveOriginalNames) {
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// Save the original name
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$originalName = $name;
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$name = clone $originalName;
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$name->setAttribute('originalName', $originalName);
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}
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$resolvedName = $this->nameContext->getResolvedName($name, $type);
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if (null !== $resolvedName) {
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return $resolvedName;
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}
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// unqualified names inside a namespace cannot be resolved at compile-time
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// add the namespaced version of the name as an attribute
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$name->setAttribute('namespacedName', FullyQualified::concat(
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$this->nameContext->getNamespace(), $name, $name->getAttributes()));
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return $name;
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}
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protected function resolveClassName(Name $name) {
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return $this->resolveName($name, Stmt\Use_::TYPE_NORMAL);
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}
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protected function addNamespacedName(Node $node) {
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$node->namespacedName = Name::concat(
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$this->nameContext->getNamespace(), (string) $node->name);
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}
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protected function resolveAttrGroups(Node $node)
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{
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foreach ($node->attrGroups as $attrGroup) {
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foreach ($attrGroup->attrs as $attr) {
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$attr->name = $this->resolveClassName($attr->name);
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}
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}
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}
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}
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