1 //===-- ASTUnresolvedSet.h - Unresolved sets of declarations ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides an UnresolvedSet-like class, whose contents are
11 // allocated using the allocator associated with an ASTContext.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
16 #define LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
18 #include "clang/AST/ASTVector.h"
19 #include "clang/AST/UnresolvedSet.h"
23 /// \brief An UnresolvedSet-like class which uses the ASTContext's allocator.
24 class ASTUnresolvedSet {
25 struct DeclsTy : ASTVector<DeclAccessPair> {
27 DeclsTy(ASTContext &C, unsigned N) : ASTVector<DeclAccessPair>(C, N) {}
29 bool isLazy() const { return getTag(); }
30 void setLazy(bool Lazy) { setTag(Lazy); }
35 friend class LazyASTUnresolvedSet;
39 ASTUnresolvedSet(ASTContext &C, unsigned N) : Decls(C, N) {}
41 typedef UnresolvedSetIterator iterator;
42 typedef UnresolvedSetIterator const_iterator;
44 iterator begin() { return iterator(Decls.begin()); }
45 iterator end() { return iterator(Decls.end()); }
47 const_iterator begin() const { return const_iterator(Decls.begin()); }
48 const_iterator end() const { return const_iterator(Decls.end()); }
50 void addDecl(ASTContext &C, NamedDecl *D, AccessSpecifier AS) {
51 Decls.push_back(DeclAccessPair::make(D, AS), C);
54 /// Replaces the given declaration with the new one, once.
56 /// \return true if the set changed
57 bool replace(const NamedDecl *Old, NamedDecl *New, AccessSpecifier AS) {
58 for (DeclsTy::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
59 if (I->getDecl() == Old) {
67 void erase(unsigned I) { Decls[I] = Decls.pop_back_val(); }
69 void clear() { Decls.clear(); }
71 bool empty() const { return Decls.empty(); }
72 unsigned size() const { return Decls.size(); }
74 void reserve(ASTContext &C, unsigned N) {
78 void append(ASTContext &C, iterator I, iterator E) {
79 Decls.append(C, I.I, E.I);
82 DeclAccessPair &operator[](unsigned I) { return Decls[I]; }
83 const DeclAccessPair &operator[](unsigned I) const { return Decls[I]; }
86 /// \brief An UnresolvedSet-like class that might not have been loaded from the
87 /// external AST source yet.
88 class LazyASTUnresolvedSet {
89 mutable ASTUnresolvedSet Impl;
91 void getFromExternalSource(ASTContext &C) const;
94 ASTUnresolvedSet &get(ASTContext &C) const {
95 if (Impl.Decls.isLazy())
96 getFromExternalSource(C);
100 void reserve(ASTContext &C, unsigned N) { Impl.reserve(C, N); }
101 void addLazyDecl(ASTContext &C, uintptr_t ID, AccessSpecifier AS) {
102 assert(Impl.empty() || Impl.Decls.isLazy());
103 Impl.Decls.setLazy(true);
104 Impl.addDecl(C, reinterpret_cast<NamedDecl*>(ID << 2), AS);