llvm/clang/include/clang/AST/StmtVisitor.h

//===- StmtVisitor.h - Visitor for Stmt subclasses --------------*- 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 defines the StmtVisitor and ConstStmtVisitor interfaces.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_STMTVISITOR_H
#define LLVM_CLANG_AST_STMTVISITOR_H

#include "clang/AST/ExprCXX.h"
#include "clang/AST/ExprConcepts.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/ExprOpenMP.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/AST/StmtOpenACC.h"
#include "clang/AST/StmtOpenMP.h"
#include "clang/Basic/LLVM.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include <utility>

namespace clang {
/// StmtVisitorBase - This class implements a simple visitor for Stmt
/// subclasses. Since Expr derives from Stmt, this also includes support for
/// visiting Exprs.
template<template <typename> class Ptr, typename ImplClass, typename RetTy=void,
         class... ParamTys>
class StmtVisitorBase { … };

/// StmtVisitor - This class implements a simple visitor for Stmt subclasses.
/// Since Expr derives from Stmt, this also includes support for visiting Exprs.
///
/// This class does not preserve constness of Stmt pointers (see also
/// ConstStmtVisitor).
template <typename ImplClass, typename RetTy = void, typename... ParamTys>
class StmtVisitor
    : public StmtVisitorBase<std::add_pointer, ImplClass, RetTy, ParamTys...> { … };

/// ConstStmtVisitor - This class implements a simple visitor for Stmt
/// subclasses. Since Expr derives from Stmt, this also includes support for
/// visiting Exprs.
///
/// This class preserves constness of Stmt pointers (see also StmtVisitor).
template <typename ImplClass, typename RetTy = void, typename... ParamTys>
class ConstStmtVisitor : public StmtVisitorBase<llvm::make_const_ptr, ImplClass,
                                                RetTy, ParamTys...> { … };

} // namespace clang

#endif // LLVM_CLANG_AST_STMTVISITOR_H