C++ (Cpp) FieldDecl::getFieldIndex示例

示例#1

bool Sema::LookupInlineAsmField(StringRef Base, StringRef Member,
                                unsigned &Offset, SourceLocation AsmLoc) {
  Offset = 0;
  SmallVector<StringRef, 2> Members;
  Member.split(Members, ".");

  LookupResult BaseResult(*this, &Context.Idents.get(Base), SourceLocation(),
                          LookupOrdinaryName);

  if (!LookupName(BaseResult, getCurScope()))
    return true;
  
  if(!BaseResult.isSingleResult())
    return true;
  NamedDecl *FoundDecl = BaseResult.getFoundDecl();
  for (StringRef NextMember : Members) {
    const RecordType *RT = nullptr;
    if (VarDecl *VD = dyn_cast<VarDecl>(FoundDecl))
      RT = VD->getType()->getAs<RecordType>();
    else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(FoundDecl)) {
      MarkAnyDeclReferenced(TD->getLocation(), TD, /*OdrUse=*/false);
      RT = TD->getUnderlyingType()->getAs<RecordType>();
    } else if (TypeDecl *TD = dyn_cast<TypeDecl>(FoundDecl))
      RT = TD->getTypeForDecl()->getAs<RecordType>();
    else if (FieldDecl *TD = dyn_cast<FieldDecl>(FoundDecl))
      RT = TD->getType()->getAs<RecordType>();
    if (!RT)
      return true;

    if (RequireCompleteType(AsmLoc, QualType(RT, 0),
                            diag::err_asm_incomplete_type))
      return true;

    LookupResult FieldResult(*this, &Context.Idents.get(NextMember),
                             SourceLocation(), LookupMemberName);

    if (!LookupQualifiedName(FieldResult, RT->getDecl()))
      return true;

    if (!FieldResult.isSingleResult())
      return true;
    FoundDecl = FieldResult.getFoundDecl();

    // FIXME: Handle IndirectFieldDecl?
    FieldDecl *FD = dyn_cast<FieldDecl>(FoundDecl);
    if (!FD)
      return true;

    const ASTRecordLayout &RL = Context.getASTRecordLayout(RT->getDecl());
    unsigned i = FD->getFieldIndex();
    CharUnits Result = Context.toCharUnitsFromBits(RL.getFieldOffset(i));
    Offset += (unsigned)Result.getQuantity();
  }

  return false;
}

示例#2

文件： SemaStmtAsm.cpp 项目： KeeganRen/clang

bool Sema::LookupInlineAsmField(StringRef Base, StringRef Member,
                                unsigned &Offset, SourceLocation AsmLoc) {
  Offset = 0;
  LookupResult BaseResult(*this, &Context.Idents.get(Base), SourceLocation(),
                          LookupOrdinaryName);

  if (!LookupName(BaseResult, getCurScope()))
    return true;

  if (!BaseResult.isSingleResult())
    return true;

  const RecordType *RT = nullptr;
  NamedDecl *FoundDecl = BaseResult.getFoundDecl();
  if (VarDecl *VD = dyn_cast<VarDecl>(FoundDecl))
    RT = VD->getType()->getAs<RecordType>();
  else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(FoundDecl))
    RT = TD->getUnderlyingType()->getAs<RecordType>();
  else if (TypeDecl *TD = dyn_cast<TypeDecl>(FoundDecl))
    RT = TD->getTypeForDecl()->getAs<RecordType>();
  if (!RT)
    return true;

  if (RequireCompleteType(AsmLoc, QualType(RT, 0), 0))
    return true;

  LookupResult FieldResult(*this, &Context.Idents.get(Member), SourceLocation(),
                           LookupMemberName);

  if (!LookupQualifiedName(FieldResult, RT->getDecl()))
    return true;

  // FIXME: Handle IndirectFieldDecl?
  FieldDecl *FD = dyn_cast<FieldDecl>(FieldResult.getFoundDecl());
  if (!FD)
    return true;

  const ASTRecordLayout &RL = Context.getASTRecordLayout(RT->getDecl());
  unsigned i = FD->getFieldIndex();
  CharUnits Result = Context.toCharUnitsFromBits(RL.getFieldOffset(i));
  Offset = (unsigned)Result.getQuantity();

  return false;
}