llvm/clang/include/clang/Tooling/RefactoringCallbacks.h

//===--- RefactoringCallbacks.h - Structural query framework ----*- 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
//
//===----------------------------------------------------------------------===//
//
//  Provides callbacks to make common kinds of refactorings easy.
//
//  The general idea is to construct a matcher expression that describes a
//  subtree match on the AST and then replace the corresponding source code
//  either by some specific text or some other AST node.
//
//  Example:
//  int main(int argc, char **argv) {
//    ClangTool Tool(argc, argv);
//    MatchFinder Finder;
//    ReplaceStmtWithText Callback("integer", "42");
//    Finder.AddMatcher(id("integer", expression(integerLiteral())), Callback);
//    return Tool.run(newFrontendActionFactory(&Finder));
//  }
//
//  This will replace all integer literals with "42".
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_TOOLING_REFACTORINGCALLBACKS_H
#define LLVM_CLANG_TOOLING_REFACTORINGCALLBACKS_H

#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Tooling/Refactoring.h"

namespace clang {
namespace tooling {

/// Base class for RefactoringCallbacks.
///
/// Collects \c tooling::Replacements while running.
class RefactoringCallback : public ast_matchers::MatchFinder::MatchCallback { … };

/// Adaptor between \c ast_matchers::MatchFinder and \c
/// tooling::RefactoringTool.
///
/// Runs AST matchers and stores the \c tooling::Replacements in a map.
class ASTMatchRefactorer { … };

/// Replace the text of the statement bound to \c FromId with the text in
/// \c ToText.
class ReplaceStmtWithText : public RefactoringCallback { … };

/// Replace the text of an AST node bound to \c FromId with the result of
/// evaluating the template in \c ToTemplate.
///
/// Expressions of the form ${NodeName} in \c ToTemplate will be
/// replaced by the text of the node bound to ${NodeName}. The string
/// "$$" will be replaced by "$".
class ReplaceNodeWithTemplate : public RefactoringCallback { … };

/// Replace the text of the statement bound to \c FromId with the text of
/// the statement bound to \c ToId.
class ReplaceStmtWithStmt : public RefactoringCallback { … };

/// Replace an if-statement bound to \c Id with the outdented text of its
/// body, choosing the consequent or the alternative based on whether
/// \c PickTrueBranch is true.
class ReplaceIfStmtWithItsBody : public RefactoringCallback { … };

} // end namespace tooling
} // end namespace clang

#endif