llvm/clang/lib/Sema/IdentifierResolver.cpp

//===- IdentifierResolver.cpp - Lexical Scope Name lookup -----------------===//
//
// 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 the IdentifierResolver class, which is used for lexical
// scoped lookup, based on declaration names.
//
//===----------------------------------------------------------------------===//

#include "clang/Sema/IdentifierResolver.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclarationName.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Lex/ExternalPreprocessorSource.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/Scope.h"
#include "llvm/Support/ErrorHandling.h"
#include <cassert>
#include <cstdint>

usingnamespaceclang;

//===----------------------------------------------------------------------===//
// IdDeclInfoMap class
//===----------------------------------------------------------------------===//

/// IdDeclInfoMap - Associates IdDeclInfos with declaration names.
/// Allocates 'pools' (vectors of IdDeclInfos) to avoid allocating each
/// individual IdDeclInfo to heap.
class IdentifierResolver::IdDeclInfoMap { … };

//===----------------------------------------------------------------------===//
// IdDeclInfo Implementation
//===----------------------------------------------------------------------===//

/// RemoveDecl - Remove the decl from the scope chain.
/// The decl must already be part of the decl chain.
void IdentifierResolver::IdDeclInfo::RemoveDecl(NamedDecl *D) { … }

//===----------------------------------------------------------------------===//
// IdentifierResolver Implementation
//===----------------------------------------------------------------------===//

IdentifierResolver::IdentifierResolver(Preprocessor &PP)
    : … { … }

IdentifierResolver::~IdentifierResolver() { … }

/// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
/// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
/// true if 'D' belongs to the given declaration context.
bool IdentifierResolver::isDeclInScope(Decl *D, DeclContext *Ctx, Scope *S,
                                       bool AllowInlineNamespace) const { … }

/// AddDecl - Link the decl to its shadowed decl chain.
void IdentifierResolver::AddDecl(NamedDecl *D) { … }

void IdentifierResolver::InsertDeclAfter(iterator Pos, NamedDecl *D) { … }

/// RemoveDecl - Unlink the decl from its shadowed decl chain.
/// The decl must already be part of the decl chain.
void IdentifierResolver::RemoveDecl(NamedDecl *D) { … }

llvm::iterator_range<IdentifierResolver::iterator>
IdentifierResolver::decls(DeclarationName Name) { … }

IdentifierResolver::iterator IdentifierResolver::begin(DeclarationName Name) { … }

namespace {

enum DeclMatchKind { … };

} // namespace

/// Compare two declarations to see whether they are different or,
/// if they are the same, whether the new declaration should replace the
/// existing declaration.
static DeclMatchKind compareDeclarations(NamedDecl *Existing, NamedDecl *New) { … }

bool IdentifierResolver::tryAddTopLevelDecl(NamedDecl *D, DeclarationName Name){ … }

void IdentifierResolver::readingIdentifier(IdentifierInfo &II) { … }

void IdentifierResolver::updatingIdentifier(IdentifierInfo &II) { … }

//===----------------------------------------------------------------------===//
// IdDeclInfoMap Implementation
//===----------------------------------------------------------------------===//

/// Returns the IdDeclInfo associated to the DeclarationName.
/// It creates a new IdDeclInfo if one was not created before for this id.
IdentifierResolver::IdDeclInfo &
IdentifierResolver::IdDeclInfoMap::operator[](DeclarationName Name) { … }

void IdentifierResolver::iterator::incrementSlowCase() { … }