include/clang/AST/ASTDumperUtils.h

//===--- ASTDumperUtils.h - Printing of AST nodes -------------------------===//
//
// 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 AST utilities for traversal down the tree.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_ASTDUMPERUTILS_H
#define LLVM_CLANG_AST_ASTDUMPERUTILS_H

#include "llvm/Support/raw_ostream.h"

namespace clang {

/// Used to specify the format for printing AST dump information.
enum ASTDumpOutputFormat {
  ADOF_Default,
  ADOF_JSON
};

// Colors used for various parts of the AST dump
// Do not use bold yellow for any text.  It is hard to read on white screens.

struct TerminalColor {
  llvm::raw_ostream::Colors Color;
  bool Bold;
};

// Red           - CastColor
// Green         - TypeColor
// Bold Green    - DeclKindNameColor, UndeserializedColor
// Yellow        - AddressColor, LocationColor
// Blue          - CommentColor, NullColor, IndentColor
// Bold Blue     - AttrColor
// Bold Magenta  - StmtColor
// Cyan          - ValueKindColor, ObjectKindColor
// Bold Cyan     - ValueColor, DeclNameColor

// Decl kind names (VarDecl, FunctionDecl, etc)
static const TerminalColor DeclKindNameColor = {llvm::raw_ostream::GREEN, true};
// Attr names (CleanupAttr, GuardedByAttr, etc)
static const TerminalColor AttrColor = {llvm::raw_ostream::BLUE, true};
// Statement names (DeclStmt, ImplicitCastExpr, etc)
static const TerminalColor StmtColor = {llvm::raw_ostream::MAGENTA, true};
// Comment names (FullComment, ParagraphComment, TextComment, etc)
static const TerminalColor CommentColor = {llvm::raw_ostream::BLUE, false};

// Type names (int, float, etc, plus user defined types)
static const TerminalColor TypeColor = {llvm::raw_ostream::GREEN, false};

// Pointer address
static const TerminalColor AddressColor = {llvm::raw_ostream::YELLOW, false};
// Source locations
static const TerminalColor LocationColor = {llvm::raw_ostream::YELLOW, false};

// lvalue/xvalue
static const TerminalColor ValueKindColor = {llvm::raw_ostream::CYAN, false};
// bitfield/objcproperty/objcsubscript/vectorcomponent
static const TerminalColor ObjectKindColor = {llvm::raw_ostream::CYAN, false};

// Null statements
static const TerminalColor NullColor = {llvm::raw_ostream::BLUE, false};

// Undeserialized entities
static const TerminalColor UndeserializedColor = {llvm::raw_ostream::GREEN,
                                                  true};

// CastKind from CastExpr's
static const TerminalColor CastColor = {llvm::raw_ostream::RED, false};

// Value of the statement
static const TerminalColor ValueColor = {llvm::raw_ostream::CYAN, true};
// Decl names
static const TerminalColor DeclNameColor = {llvm::raw_ostream::CYAN, true};

// Indents ( `, -. | )
static const TerminalColor IndentColor = {llvm::raw_ostream::BLUE, false};

class ColorScope {
  llvm::raw_ostream &OS;
  const bool ShowColors;

public:
  ColorScope(llvm::raw_ostream &OS, bool ShowColors, TerminalColor Color)
      : OS(OS), ShowColors(ShowColors) {
    if (ShowColors)
      OS.changeColor(Color.Color, Color.Bold);
  }
  ~ColorScope() {
    if (ShowColors)
      OS.resetColor();
  }
};

} // namespace clang

#endif // LLVM_CLANG_AST_ASTDUMPERUTILS_H