forked from OSchip/llvm-project
132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
//===- ASTCommon.h - Common stuff for ASTReader/ASTWriter -*- 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 common functions that both ASTReader and ASTWriter use.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
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#define LLVM_CLANG_LIB_SERIALIZATION_ASTCOMMON_H
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclFriend.h"
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#include "clang/Serialization/ASTBitCodes.h"
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namespace clang {
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namespace serialization {
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enum DeclUpdateKind {
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UPD_CXX_ADDED_IMPLICIT_MEMBER,
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UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION,
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UPD_CXX_ADDED_ANONYMOUS_NAMESPACE,
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UPD_CXX_ADDED_FUNCTION_DEFINITION,
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UPD_CXX_ADDED_VAR_DEFINITION,
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UPD_CXX_POINT_OF_INSTANTIATION,
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UPD_CXX_INSTANTIATED_CLASS_DEFINITION,
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UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT,
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UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER,
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UPD_CXX_RESOLVED_DTOR_DELETE,
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UPD_CXX_RESOLVED_EXCEPTION_SPEC,
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UPD_CXX_DEDUCED_RETURN_TYPE,
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UPD_DECL_MARKED_USED,
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UPD_MANGLING_NUMBER,
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UPD_STATIC_LOCAL_NUMBER,
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UPD_DECL_MARKED_OPENMP_THREADPRIVATE,
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UPD_DECL_MARKED_OPENMP_ALLOCATE,
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UPD_DECL_MARKED_OPENMP_DECLARETARGET,
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UPD_DECL_EXPORTED,
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UPD_ADDED_ATTR_TO_RECORD
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};
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TypeIdx TypeIdxFromBuiltin(const BuiltinType *BT);
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template <typename IdxForTypeTy>
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TypeID MakeTypeID(ASTContext &Context, QualType T, IdxForTypeTy IdxForType) {
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if (T.isNull())
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return PREDEF_TYPE_NULL_ID;
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unsigned FastQuals = T.getLocalFastQualifiers();
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T.removeLocalFastQualifiers();
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if (T.hasLocalNonFastQualifiers())
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return IdxForType(T).asTypeID(FastQuals);
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assert(!T.hasLocalQualifiers());
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if (const BuiltinType *BT = dyn_cast<BuiltinType>(T.getTypePtr()))
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return TypeIdxFromBuiltin(BT).asTypeID(FastQuals);
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if (T == Context.AutoDeductTy)
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return TypeIdx(PREDEF_TYPE_AUTO_DEDUCT).asTypeID(FastQuals);
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if (T == Context.AutoRRefDeductTy)
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return TypeIdx(PREDEF_TYPE_AUTO_RREF_DEDUCT).asTypeID(FastQuals);
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return IdxForType(T).asTypeID(FastQuals);
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}
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unsigned ComputeHash(Selector Sel);
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/// Retrieve the "definitive" declaration that provides all of the
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/// visible entries for the given declaration context, if there is one.
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///
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/// The "definitive" declaration is the only place where we need to look to
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/// find information about the declarations within the given declaration
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/// context. For example, C++ and Objective-C classes, C structs/unions, and
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/// Objective-C protocols, categories, and extensions are all defined in a
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/// single place in the source code, so they have definitive declarations
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/// associated with them. C++ namespaces, on the other hand, can have
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/// multiple definitions.
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const DeclContext *getDefinitiveDeclContext(const DeclContext *DC);
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/// Determine whether the given declaration kind is redeclarable.
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bool isRedeclarableDeclKind(unsigned Kind);
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/// Determine whether the given declaration needs an anonymous
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/// declaration number.
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bool needsAnonymousDeclarationNumber(const NamedDecl *D);
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/// Visit each declaration within \c DC that needs an anonymous
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/// declaration number and call \p Visit with the declaration and its number.
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template<typename Fn> void numberAnonymousDeclsWithin(const DeclContext *DC,
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Fn Visit) {
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unsigned Index = 0;
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for (Decl *LexicalD : DC->decls()) {
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// For a friend decl, we care about the declaration within it, if any.
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if (auto *FD = dyn_cast<FriendDecl>(LexicalD))
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LexicalD = FD->getFriendDecl();
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auto *ND = dyn_cast_or_null<NamedDecl>(LexicalD);
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if (!ND || !needsAnonymousDeclarationNumber(ND))
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continue;
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Visit(ND, Index++);
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}
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}
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/// Determine whether the given declaration will be included in the per-module
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/// initializer if it needs to be eagerly handed to the AST consumer. If so, we
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/// should not hand it to the consumer when deserializing it, nor include it in
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/// the list of eagerly deserialized declarations.
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inline bool isPartOfPerModuleInitializer(const Decl *D) {
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if (isa<ImportDecl>(D))
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return true;
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// Template instantiations are notionally in an "instantiation unit" rather
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// than in any particular translation unit, so they need not be part of any
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// particular (sub)module's per-module initializer.
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if (auto *VD = dyn_cast<VarDecl>(D))
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return !isTemplateInstantiation(VD->getTemplateSpecializationKind());
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return false;
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}
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} // namespace serialization
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} // namespace clang
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#endif
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