Exemplo n.º 1
0
bool SemaAnnotator::
passReference(ValueDecl *D, Type Ty, DeclNameLoc Loc, ReferenceMetaData Data) {
  TypeDecl *CtorTyRef = nullptr;
  ExtensionDecl *ExtDecl = nullptr;

  if (auto *TD = dyn_cast<TypeDecl>(D)) {
    if (!CtorRefs.empty() && Loc.isValid()) {
      Expr *Fn = CtorRefs.back()->getFn();
      if (Fn->getLoc() == Loc.getBaseNameLoc()) {
        D = extractDecl(Fn);
        CtorTyRef = TD;
      }
    }

    if (!ExtDecls.empty() && Loc.isValid()) {
      auto ExtTyLoc = ExtDecls.back()->getExtendedTypeLoc().getLoc();
      if (ExtTyLoc.isValid() && ExtTyLoc == Loc.getBaseNameLoc()) {
        ExtDecl = ExtDecls.back();
      }
    }
  }

  CharSourceRange Range =
    Lexer::getCharSourceRangeFromSourceRange(D->getASTContext().SourceMgr,
                                             Loc.getSourceRange());
  bool Continue = SEWalker.visitDeclReference(D, Range, CtorTyRef, ExtDecl, Ty,
                                              Data);
  if (!Continue)
    Cancelled = true;
  return Continue;
}
Exemplo n.º 2
0
bool SemaAnnotator::passReference(ValueDecl *D, Type Ty, SourceLoc Loc) {
  unsigned NameLen = D->getName().getLength();
  TypeDecl *CtorTyRef = nullptr;

  if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
    if (!CtorRefs.empty() && Loc.isValid()) {
      Expr *Fn = CtorRefs.back()->getFn();
      if (Fn->getLoc() == Loc) {
        D = extractDecl(Fn);
        CtorTyRef = TD;
      }
    }
  }

  CharSourceRange Range = (Loc.isValid()) ? CharSourceRange(Loc, NameLen)
                                          : CharSourceRange();
  bool Continue = SEWalker.visitDeclReference(D, Range, CtorTyRef, Ty);
  if (!Continue)
    Cancelled = true;
  return Continue;
}
Exemplo n.º 3
0
bool SemaAnnotator::passReference(ValueDecl *D, Type Ty, DeclNameLoc Loc) {
  TypeDecl *CtorTyRef = nullptr;

  if (TypeDecl *TD = dyn_cast<TypeDecl>(D)) {
    if (!CtorRefs.empty() && Loc.isValid()) {
      Expr *Fn = CtorRefs.back()->getFn();
      if (Fn->getLoc() == Loc.getBaseNameLoc()) {
        D = extractDecl(Fn);
        CtorTyRef = TD;
      }
    }
  }

  CharSourceRange Range =
    Lexer::getCharSourceRangeFromSourceRange(D->getASTContext().SourceMgr,
                                             Loc.getSourceRange());
  bool Continue = SEWalker.visitDeclReference(D, Range, CtorTyRef, Ty);
  if (!Continue)
    Cancelled = true;
  return Continue;
}
Exemplo n.º 4
0
bool RValueTreatedAsLValueFailure::diagnoseAsError() {
  Diag<StringRef> subElementDiagID;
  Diag<Type> rvalueDiagID = diag::assignment_lhs_not_lvalue;
  Expr *diagExpr = getLocator()->getAnchor();
  SourceLoc loc = diagExpr->getLoc();

  if (auto assignExpr = dyn_cast<AssignExpr>(diagExpr)) {
    diagExpr = assignExpr->getDest();
  }

  if (auto callExpr = dyn_cast<ApplyExpr>(diagExpr)) {
    Expr *argExpr = callExpr->getArg();
    loc = callExpr->getFn()->getLoc();

    if (isa<PrefixUnaryExpr>(callExpr) || isa<PostfixUnaryExpr>(callExpr)) {
      subElementDiagID = diag::cannot_apply_lvalue_unop_to_subelement;
      rvalueDiagID = diag::cannot_apply_lvalue_unop_to_rvalue;
      diagExpr = argExpr;
    } else if (isa<BinaryExpr>(callExpr)) {
      subElementDiagID = diag::cannot_apply_lvalue_binop_to_subelement;
      rvalueDiagID = diag::cannot_apply_lvalue_binop_to_rvalue;
      auto argTuple = dyn_cast<TupleExpr>(argExpr);
      diagExpr = argTuple->getElement(0);
    } else if (getLocator()->getPath().size() > 0) {
      auto lastPathElement = getLocator()->getPath().back();
      assert(lastPathElement.getKind() ==
             ConstraintLocator::PathElementKind::ApplyArgToParam);

      subElementDiagID = diag::cannot_pass_rvalue_inout_subelement;
      rvalueDiagID = diag::cannot_pass_rvalue_inout;
      if (auto argTuple = dyn_cast<TupleExpr>(argExpr))
        diagExpr = argTuple->getElement(lastPathElement.getValue());
      else if (auto parens = dyn_cast<ParenExpr>(argExpr))
        diagExpr = parens->getSubExpr();
    } else {
      subElementDiagID = diag::assignment_lhs_is_apply_expression;
    }
  } else if (auto inoutExpr = dyn_cast<InOutExpr>(diagExpr)) {
    if (auto restriction = getRestrictionForType(getType(inoutExpr))) {
      PointerTypeKind pointerKind;
      if (restriction->second == ConversionRestrictionKind::ArrayToPointer &&
          restriction->first->getAnyPointerElementType(pointerKind) &&
          (pointerKind == PTK_UnsafePointer ||
           pointerKind == PTK_UnsafeRawPointer)) {
        // If we're converting to an UnsafePointer, then the programmer
        // specified an & unnecessarily. Produce a fixit hint to remove it.
        emitDiagnostic(inoutExpr->getLoc(),
                       diag::extra_address_of_unsafepointer, restriction->first)
            .highlight(inoutExpr->getSourceRange())
            .fixItRemove(inoutExpr->getStartLoc());
        return true;
      }
    }

    subElementDiagID = diag::cannot_pass_rvalue_inout_subelement;
    rvalueDiagID = diag::cannot_pass_rvalue_inout;
    diagExpr = inoutExpr->getSubExpr();
  } else if (isa<DeclRefExpr>(diagExpr)) {
    subElementDiagID = diag::assignment_lhs_is_immutable_variable;
  } else if (isa<ForceValueExpr>(diagExpr)) {
    subElementDiagID = diag::assignment_bang_has_immutable_subcomponent;
  } else if (isa<MemberRefExpr>(diagExpr)) {
    subElementDiagID = diag::assignment_lhs_is_immutable_property;
  } else if (auto member = dyn_cast<UnresolvedDotExpr>(diagExpr)) {
    subElementDiagID = diag::assignment_lhs_is_immutable_property;

    if (auto *ctor = dyn_cast<ConstructorDecl>(getDC())) {
      if (auto *baseRef = dyn_cast<DeclRefExpr>(member->getBase())) {
        if (baseRef->getDecl() == ctor->getImplicitSelfDecl() &&
            ctor->getDelegatingOrChainedInitKind(nullptr) ==
            ConstructorDecl::BodyInitKind::Delegating) {
          emitDiagnostic(loc, diag::assignment_let_property_delegating_init,
                      member->getName());
          if (auto *ref = getResolvedMemberRef(member)) {
            emitDiagnostic(ref, diag::decl_declared_here, member->getName());
          }
          return true;
        }
      }
    }

    if (auto resolvedOverload = getResolvedOverload(getLocator()))
      if (resolvedOverload->Choice.getKind() ==
          OverloadChoiceKind::DynamicMemberLookup)
        subElementDiagID = diag::assignment_dynamic_property_has_immutable_base;
  } else if (auto sub = dyn_cast<SubscriptExpr>(diagExpr)) {
      subElementDiagID = diag::assignment_subscript_has_immutable_base;
  } else {
    subElementDiagID = diag::assignment_lhs_is_immutable_variable;
  }

  AssignmentFailure failure(diagExpr, getConstraintSystem(), loc,
                            subElementDiagID, rvalueDiagID);
  return failure.diagnose();
}