1//===--- StmtViz.cpp - Graphviz visualization for Stmt ASTs -----*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file implements Stmt::viewAST, which generates a Graphviz DOT file 10// that depicts the AST and then calls Graphviz/dot+gv on it. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/StmtGraphTraits.h" 15#include "clang/AST/Decl.h" 16#include "llvm/Support/GraphWriter.h" 17 18using namespace clang; 19 20void Stmt::viewAST() const { 21#ifndef NDEBUG 22 llvm::ViewGraph(this,"AST"); 23#else 24 llvm::errs() << "Stmt::viewAST is only available in debug builds on " 25 << "systems with Graphviz or gv!\n"; 26#endif 27} 28 29namespace llvm { 30template<> 31struct DOTGraphTraits<const Stmt*> : public DefaultDOTGraphTraits { 32 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 33 34 static std::string getNodeLabel(const Stmt* Node, const Stmt* Graph) { 35 36#ifndef NDEBUG 37 std::string OutSStr; 38 llvm::raw_string_ostream Out(OutSStr); 39 40 if (Node) 41 Out << Node->getStmtClassName(); 42 else 43 Out << "<NULL>"; 44 45 std::string OutStr = Out.str(); 46 if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 47 48 // Process string output to make it nicer... 49 for (unsigned i = 0; i != OutStr.length(); ++i) 50 if (OutStr[i] == '\n') { // Left justify 51 OutStr[i] = '\\'; 52 OutStr.insert(OutStr.begin()+i+1, 'l'); 53 } 54 55 return OutStr; 56#else 57 return ""; 58#endif 59 } 60}; 61} // end namespace llvm 62