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