зеркало из https://github.com/microsoft/clang-1.git
48 строки
1.2 KiB
C++
48 строки
1.2 KiB
C++
//===--- ParentMap.cpp - Mappings from Stmts to their Parents ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the ParentMap class.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ParentMap.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/Expr.h"
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#include "llvm/ADT/DenseMap.h"
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using namespace clang;
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typedef llvm::DenseMap<Stmt*, Stmt*> MapTy;
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static void BuildParentMap(MapTy& M, Stmt* S) {
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for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I)
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if (*I) {
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M[*I] = S;
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BuildParentMap(M, *I);
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}
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}
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ParentMap::ParentMap(Stmt* S) : Impl(0) {
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if (S) {
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MapTy *M = new MapTy();
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BuildParentMap(*M, S);
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Impl = M;
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}
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}
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ParentMap::~ParentMap() {
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delete (MapTy*) Impl;
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}
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Stmt* ParentMap::getParent(Stmt* S) const {
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MapTy* M = (MapTy*) Impl;
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MapTy::iterator I = M->find(S);
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return I == M->end() ? 0 : I->second;
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}
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