external/bsd/llvm/dist/clang/lib/AST/StmtViz.cpp

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