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//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// FindSymbol.cpp:
// Utility for finding a symbol node inside an AST tree.
#include "compiler/translator/tree_util/FindSymbolNode.h"
#include "compiler/translator/ImmutableString.h"
#include "compiler/translator/Symbol.h"
#include "compiler/translator/tree_util/IntermTraverse.h"
namespace sh
{
namespace
{
class SymbolFinder : public TIntermTraverser
{
public:
SymbolFinder(const ImmutableString &symbolName)
: TIntermTraverser(true, false, false), mSymbolName(symbolName), mNodeFound(nullptr)
{}
void visitSymbol(TIntermSymbol *node) override
{
if (node->variable().symbolType() != SymbolType::Empty && node->getName() == mSymbolName)
{
mNodeFound = node;
}
}
bool isFound() const { return mNodeFound != nullptr; }
const TIntermSymbol *getNode() const { return mNodeFound; }
private:
ImmutableString mSymbolName;
TIntermSymbol *mNodeFound;
};
} // anonymous namespace
const TIntermSymbol *FindSymbolNode(TIntermNode *root, const ImmutableString &symbolName)
{
SymbolFinder finder(symbolName);
root->traverse(&finder);
return finder.getNode();
}
} // namespace sh
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