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//
// Copyright (c) 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/FindSymbolNode.h"
#include "compiler/translator/IntermTraverse.h"
namespace sh
{
namespace
{
class SymbolFinder : public TIntermTraverser
{
public:
SymbolFinder(const TString &symbolName, TBasicType basicType)
: TIntermTraverser(true, false, false),
mSymbolName(symbolName),
mNodeFound(nullptr),
mBasicType(basicType)
{
}
void visitSymbol(TIntermSymbol *node)
{
if (node->getBasicType() == mBasicType && node->getSymbol() == mSymbolName)
{
mNodeFound = node;
}
}
bool isFound() const { return mNodeFound != nullptr; }
const TIntermSymbol *getNode() const { return mNodeFound; }
private:
TString mSymbolName;
TIntermSymbol *mNodeFound;
TBasicType mBasicType;
};
} // anonymous namespace
const TIntermSymbol *FindSymbolNode(TIntermNode *root,
const TString &symbolName,
TBasicType basicType)
{
SymbolFinder finder(symbolName, basicType);
root->traverse(&finder);
return finder.getNode();
}
} // namespace sh
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