Esempi in C++ (Cpp) per EnumDecl::getInstantiatedFromMemberEnum

Esempio n. 1

File: SemaCXXScopeSpec.cpp Progetto: C0deZLee/llvm-dsa

/// \brief Require that the context specified by SS be complete.
///
/// If SS refers to a type, this routine checks whether the type is
/// complete enough (or can be made complete enough) for name lookup
/// into the DeclContext. A type that is not yet completed can be
/// considered "complete enough" if it is a class/struct/union/enum
/// that is currently being defined. Or, if we have a type that names
/// a class template specialization that is not a complete type, we
/// will attempt to instantiate that class template.
bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS,
                                      DeclContext *DC) {
  assert(DC && "given null context");

  TagDecl *tag = dyn_cast<TagDecl>(DC);

  // If this is a dependent type, then we consider it complete.
  if (!tag || tag->isDependentContext())
    return false;

  // If we're currently defining this type, then lookup into the
  // type is okay: don't complain that it isn't complete yet.
  QualType type = Context.getTypeDeclType(tag);
  const TagType *tagType = type->getAs<TagType>();
  if (tagType && tagType->isBeingDefined())
    return false;

  SourceLocation loc = SS.getLastQualifierNameLoc();
  if (loc.isInvalid()) loc = SS.getRange().getBegin();

  // The type must be complete.
  if (RequireCompleteType(loc, type, diag::err_incomplete_nested_name_spec,
                          SS.getRange())) {
    SS.SetInvalid(SS.getRange());
    return true;
  }

  // Fixed enum types are complete, but they aren't valid as scopes
  // until we see a definition, so awkwardly pull out this special
  // case.
  // FIXME: The definition might not be visible; complain if it is not.
  const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType);
  if (!enumType || enumType->getDecl()->isCompleteDefinition())
    return false;

  // Try to instantiate the definition, if this is a specialization of an
  // enumeration temploid.
  EnumDecl *ED = enumType->getDecl();
  if (EnumDecl *Pattern = ED->getInstantiatedFromMemberEnum()) {
    MemberSpecializationInfo *MSI = ED->getMemberSpecializationInfo();
    if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) {
      if (InstantiateEnum(loc, ED, Pattern, getTemplateInstantiationArgs(ED),
                          TSK_ImplicitInstantiation)) {
        SS.SetInvalid(SS.getRange());
        return true;
      }
      return false;
    }
  }

  Diag(loc, diag::err_incomplete_nested_name_spec)
    << type << SS.getRange();
  SS.SetInvalid(SS.getRange());
  return true;
}

Esempio n. 2

File: SemaCXXScopeSpec.cpp Progetto: CSI-LLVM/clang

/// \brief Require that the context specified by SS be complete.
///
/// If SS refers to a type, this routine checks whether the type is
/// complete enough (or can be made complete enough) for name lookup
/// into the DeclContext. A type that is not yet completed can be
/// considered "complete enough" if it is a class/struct/union/enum
/// that is currently being defined. Or, if we have a type that names
/// a class template specialization that is not a complete type, we
/// will attempt to instantiate that class template.
bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS,
                                      DeclContext *DC) {
  assert(DC && "given null context");

  TagDecl *tag = dyn_cast<TagDecl>(DC);

  // If this is a dependent type, then we consider it complete.
  // FIXME: This is wrong; we should require a (visible) definition to
  // exist in this case too.
  if (!tag || tag->isDependentContext())
    return false;

  // If we're currently defining this type, then lookup into the
  // type is okay: don't complain that it isn't complete yet.
  QualType type = Context.getTypeDeclType(tag);
  const TagType *tagType = type->getAs<TagType>();
  if (tagType && tagType->isBeingDefined())
    return false;

  SourceLocation loc = SS.getLastQualifierNameLoc();
  if (loc.isInvalid()) loc = SS.getRange().getBegin();

  // The type must be complete.
  if (RequireCompleteType(loc, type, diag::err_incomplete_nested_name_spec,
                          SS.getRange())) {
    SS.SetInvalid(SS.getRange());
    return true;
  }

  // Fixed enum types are complete, but they aren't valid as scopes
  // until we see a definition, so awkwardly pull out this special
  // case.
  const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType);
  if (!enumType)
    return false;
  if (enumType->getDecl()->isCompleteDefinition()) {
    // If we know about the definition but it is not visible, complain.
    NamedDecl *SuggestedDef = nullptr;
    if (!hasVisibleDefinition(enumType->getDecl(), &SuggestedDef,
                              /*OnlyNeedComplete*/false)) {
      // If the user is going to see an error here, recover by making the
      // definition visible.
      bool TreatAsComplete = !isSFINAEContext();
      diagnoseMissingImport(loc, SuggestedDef, MissingImportKind::Definition,
                            /*Recover*/TreatAsComplete);
      return !TreatAsComplete;
    }
    return false;
  }

  // Try to instantiate the definition, if this is a specialization of an
  // enumeration temploid.
  EnumDecl *ED = enumType->getDecl();
  if (EnumDecl *Pattern = ED->getInstantiatedFromMemberEnum()) {
    MemberSpecializationInfo *MSI = ED->getMemberSpecializationInfo();
    if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) {
      if (InstantiateEnum(loc, ED, Pattern, getTemplateInstantiationArgs(ED),
                          TSK_ImplicitInstantiation)) {
        SS.SetInvalid(SS.getRange());
        return true;
      }
      return false;
    }
  }

  Diag(loc, diag::err_incomplete_nested_name_spec)
    << type << SS.getRange();
  SS.SetInvalid(SS.getRange());
  return true;
}