6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===- DeclVisitor.h - Visitor for Decl subclasses --------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the DeclVisitor interface.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_DECLVISITOR_H
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#define LLVM_CLANG_AST_DECLVISITOR_H
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclBase.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclFriend.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclOpenMP.h"
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#include "clang/AST/DeclTemplate.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace clang {
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namespace declvisitor {
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/// A simple visitor class that helps create declaration visitors.
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template<template <typename> class Ptr, typename ImplClass, typename RetTy=void>
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class Base {
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public:
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#define PTR(CLASS) typename Ptr<CLASS>::type
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#define DISPATCH(NAME, CLASS) \
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return static_cast<ImplClass*>(this)->Visit##NAME(static_cast<PTR(CLASS)>(D))
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RetTy Visit(PTR(Decl) D) {
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switch (D->getKind()) {
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#define DECL(DERIVED, BASE) \
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case Decl::DERIVED: DISPATCH(DERIVED##Decl, DERIVED##Decl);
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#define ABSTRACT_DECL(DECL)
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#include "clang/AST/DeclNodes.inc"
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}
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llvm_unreachable("Decl that isn't part of DeclNodes.inc!");
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}
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// If the implementation chooses not to implement a certain visit
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// method, fall back to the parent.
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#define DECL(DERIVED, BASE) \
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RetTy Visit##DERIVED##Decl(PTR(DERIVED##Decl) D) { DISPATCH(BASE, BASE); }
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#include "clang/AST/DeclNodes.inc"
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RetTy VisitDecl(PTR(Decl) D) { return RetTy(); }
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#undef PTR
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#undef DISPATCH
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};
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} // namespace declvisitor
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/// A simple visitor class that helps create declaration visitors.
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///
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/// This class does not preserve constness of Decl pointers (see also
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/// ConstDeclVisitor).
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template <typename ImplClass, typename RetTy = void>
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class DeclVisitor
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: public declvisitor::Base<std::add_pointer, ImplClass, RetTy> {};
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/// A simple visitor class that helps create declaration visitors.
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///
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/// This class preserves constness of Decl pointers (see also DeclVisitor).
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template <typename ImplClass, typename RetTy = void>
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class ConstDeclVisitor
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: public declvisitor::Base<llvm::make_const_ptr, ImplClass, RetTy> {};
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} // namespace clang
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#endif // LLVM_CLANG_AST_DECLVISITOR_H
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