Coverage Report

Created: 2020-02-18 08:44

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/AST/DeclGroup.h
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//===- DeclGroup.h - Classes for representing groups of Decls ---*- 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 DeclGroup, DeclGroupRef, and OwningDeclGroup classes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_AST_DECLGROUP_H
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#define LLVM_CLANG_AST_DECLGROUP_H
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#include "llvm/Support/TrailingObjects.h"
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#include <cassert>
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#include <cstdint>
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namespace clang {
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class ASTContext;
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class Decl;
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class DeclGroup final : private llvm::TrailingObjects<DeclGroup, Decl *> {
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  // FIXME: Include a TypeSpecifier object.
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  unsigned NumDecls = 0;
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private:
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  DeclGroup() = default;
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  DeclGroup(unsigned numdecls, Decl** decls);
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public:
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  friend TrailingObjects;
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  static DeclGroup *Create(ASTContext &C, Decl **Decls, unsigned NumDecls);
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  unsigned size() const { return NumDecls; }
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  Decl*& operator[](unsigned i) {
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    assert (i < NumDecls && "Out-of-bounds access.");
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    return getTrailingObjects<Decl *>()[i];
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  }
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  Decl* const& operator[](unsigned i) const {
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    assert (i < NumDecls && "Out-of-bounds access.");
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    return getTrailingObjects<Decl *>()[i];
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  }
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};
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class DeclGroupRef {
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  // Note this is not a PointerIntPair because we need the address of the
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  // non-group case to be valid as a Decl** for iteration.
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  enum Kind { SingleDeclKind=0x0, DeclGroupKind=0x1, Mask=0x1 };
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  Decl* D = nullptr;
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  Kind getKind() const {
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    return (Kind) (reinterpret_cast<uintptr_t>(D) & Mask);
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  }
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public:
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  DeclGroupRef() = default;
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  explicit DeclGroupRef(Decl* d) : D(d) {}
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  explicit DeclGroupRef(DeclGroup* dg)
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    : D((Decl*) (reinterpret_cast<uintptr_t>(dg) | DeclGroupKind)) {}
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  static DeclGroupRef Create(ASTContext &C, Decl **Decls, unsigned NumDecls) {
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    if (NumDecls == 0)
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      return DeclGroupRef();
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    if (NumDecls == 1)
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      return DeclGroupRef(Decls[0]);
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    return DeclGroupRef(DeclGroup::Create(C, Decls, NumDecls));
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  }
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  using iterator = Decl **;
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  using const_iterator = Decl * const *;
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  bool isNull() const { return D == nullptr; }
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  bool isSingleDecl() const { return getKind() == SingleDeclKind; }
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  bool isDeclGroup() const { return getKind() == DeclGroupKind; }
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  Decl *getSingleDecl() {
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    assert(isSingleDecl() && "Isn't a single decl");
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    return D;
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  }
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  const Decl *getSingleDecl() const {
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    return const_cast<DeclGroupRef*>(this)->getSingleDecl();
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  }
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  DeclGroup &getDeclGroup() {
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    assert(isDeclGroup() && "Isn't a declgroup");
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    return *((DeclGroup*)(reinterpret_cast<uintptr_t>(D) & ~Mask));
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  }
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  const DeclGroup &getDeclGroup() const {
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    return const_cast<DeclGroupRef*>(this)->getDeclGroup();
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  }
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  iterator begin() {
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    if (isSingleDecl())
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      return D ? 
&D15.5M
:
nullptr38
;
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    return &getDeclGroup()[0];
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  }
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  iterator end() {
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    if (isSingleDecl())
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      return D ? 
&D+19.55M
:
nullptr38
;
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    DeclGroup &G = getDeclGroup();
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    return &G[0] + G.size();
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  }
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  const_iterator begin() const {
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    if (isSingleDecl())
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      return D ? &D : 
nullptr0
;
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    return &getDeclGroup()[0];
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  }
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  const_iterator end() const {
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    if (isSingleDecl())
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      return D ? &D+1 : 
nullptr0
;
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    const DeclGroup &G = getDeclGroup();
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    return &G[0] + G.size();
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  }
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  void *getAsOpaquePtr() const { return D; }
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  static DeclGroupRef getFromOpaquePtr(void *Ptr) {
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    DeclGroupRef X;
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    X.D = static_cast<Decl*>(Ptr);
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    return X;
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  }
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};
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} // namespace clang
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namespace llvm {
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  // DeclGroupRef is "like a pointer", implement PointerLikeTypeTraits.
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  template <typename T>
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  struct PointerLikeTypeTraits;
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  template <>
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  struct PointerLikeTypeTraits<clang::DeclGroupRef> {
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    static inline void *getAsVoidPointer(clang::DeclGroupRef P) {
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      return P.getAsOpaquePtr();
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    }
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    static inline clang::DeclGroupRef getFromVoidPointer(void *P) {
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      return clang::DeclGroupRef::getFromOpaquePtr(P);
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    }
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    static constexpr int NumLowBitsAvailable = 0;
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  };
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} // namespace llvm
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#endif // LLVM_CLANG_AST_DECLGROUP_H