62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
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//===--- StmtViz.cpp - Graphviz visualization for Stmt ASTs -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements Stmt::viewAST, which generates a Graphviz DOT file
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// that depicts the AST and then calls Graphviz/dot+gv on it.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/StmtGraphTraits.h"
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#include "clang/AST/Decl.h"
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#include "llvm/Support/GraphWriter.h"
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using namespace clang;
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void Stmt::viewAST() const {
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#ifndef NDEBUG
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llvm::ViewGraph(this,"AST");
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#else
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llvm::errs() << "Stmt::viewAST is only available in debug builds on "
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<< "systems with Graphviz or gv!\n";
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#endif
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}
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namespace llvm {
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template<>
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struct DOTGraphTraits<const Stmt*> : public DefaultDOTGraphTraits {
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DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
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static std::string getNodeLabel(const Stmt* Node, const Stmt* Graph) {
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#ifndef NDEBUG
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std::string OutSStr;
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llvm::raw_string_ostream Out(OutSStr);
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if (Node)
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Out << Node->getStmtClassName();
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else
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Out << "<NULL>";
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std::string OutStr = Out.str();
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if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
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// Process string output to make it nicer...
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for (unsigned i = 0; i != OutStr.length(); ++i)
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if (OutStr[i] == '\n') { // Left justify
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OutStr[i] = '\\';
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OutStr.insert(OutStr.begin()+i+1, 'l');
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}
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return OutStr;
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#else
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return "";
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#endif
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}
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};
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} // end namespace llvm
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