llvm/clang/lib/AST/InheritViz.cpp

//===- InheritViz.cpp - Graphviz visualization for inheritance --*- 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 CXXRecordDecl::viewInheritance, which
//  generates a GraphViz DOT file that depicts the class inheritance
//  diagram and then calls Graphviz/dot+gv on it.
//
//===----------------------------------------------------------------------===//

#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/TypeOrdering.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/raw_ostream.h"
#include <map>
#include <set>
usingnamespaceclang;

namespace {
/// InheritanceHierarchyWriter - Helper class that writes out a
/// GraphViz file that diagrams the inheritance hierarchy starting at
/// a given C++ class type. Note that we do not use LLVM's
/// GraphWriter, because the interface does not permit us to properly
/// differentiate between uses of types as virtual bases
/// vs. non-virtual bases.
class InheritanceHierarchyWriter { … };
} // namespace

void InheritanceHierarchyWriter::WriteNode(QualType Type, bool FromVirtual) { … }

/// WriteNodeReference - Write out a reference to the given node,
/// using a unique identifier for each direct base and for the
/// (only) virtual base.
raw_ostream&
InheritanceHierarchyWriter::WriteNodeReference(QualType Type,
                                               bool FromVirtual) { … }

/// viewInheritance - Display the inheritance hierarchy of this C++
/// class using GraphViz.
void CXXRecordDecl::viewInheritance(ASTContext& Context) const { … }