diff options
| author | Fariborz Jahanian <fjahanian@apple.com> | 2013-03-28 19:50:55 +0000 |
|---|---|---|
| committer | Fariborz Jahanian <fjahanian@apple.com> | 2013-03-28 19:50:55 +0000 |
| commit | ec8deba768e7ba93ad9974763dc3902896924a3c (patch) | |
| tree | 7ec97819af944a583050ff48b1e208ae9ebb0e21 /lib/Sema/SemaExpr.cpp | |
| parent | 5fd1fac0104e22533bc0284fdd0f42f843c975f5 (diff) | |
Objective-C: Provide fixit suggestions when class object
is accessed via accessing 'isa' ivar to use
object_getClass/object_setClass apis.
// rdar://13503456
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178282 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Sema/SemaExpr.cpp')
| -rw-r--r-- | lib/Sema/SemaExpr.cpp | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp index 54422e81eb..238d833c38 100644 --- a/lib/Sema/SemaExpr.cpp +++ b/lib/Sema/SemaExpr.cpp @@ -491,8 +491,18 @@ ExprResult Sema::DefaultLvalueConversion(Expr *E) { } CheckForNullPointerDereference(*this, E); - if (isa<ObjCIsaExpr>(E->IgnoreParens())) - Diag(E->getExprLoc(), diag::warn_objc_isa_use); + if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(E->IgnoreParenCasts())) { + NamedDecl *ObjectGetClass = LookupSingleName(TUScope, + &Context.Idents.get("object_getClass"), + SourceLocation(), LookupOrdinaryName); + if (ObjectGetClass) + Diag(E->getExprLoc(), diag::warn_objc_isa_use) << + FixItHint::CreateInsertion(OISA->getLocStart(), "object_getClass(") << + FixItHint::CreateReplacement( + SourceRange(OISA->getOpLoc(), OISA->getIsaMemberLoc()), ")"); + else + Diag(E->getExprLoc(), diag::warn_objc_isa_use); + } // C++ [conv.lval]p1: // [...] If T is a non-class type, the type of the prvalue is the @@ -8537,8 +8547,20 @@ ExprResult Sema::CreateBuiltinBinOp(SourceLocation OpLoc, CheckArrayAccess(LHS.get()); CheckArrayAccess(RHS.get()); - if (isa<ObjCIsaExpr>(LHS.get()->IgnoreParens())) - Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign); + if (const ObjCIsaExpr *OISA = dyn_cast<ObjCIsaExpr>(LHS.get()->IgnoreParenCasts())) { + NamedDecl *ObjectSetClass = LookupSingleName(TUScope, + &Context.Idents.get("object_setClass"), + SourceLocation(), LookupOrdinaryName); + if (ObjectSetClass && isa<ObjCIsaExpr>(LHS.get())) { + SourceLocation RHSLocEnd = PP.getLocForEndOfToken(RHS.get()->getLocEnd()); + Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign) << + FixItHint::CreateInsertion(LHS.get()->getLocStart(), "object_setClass(") << + FixItHint::CreateReplacement(SourceRange(OISA->getOpLoc(), OpLoc), ",") << + FixItHint::CreateInsertion(RHSLocEnd, ")"); + } + else + Diag(LHS.get()->getExprLoc(), diag::warn_objc_isa_assign); + } if (CompResultTy.isNull()) return Owned(new (Context) BinaryOperator(LHS.take(), RHS.take(), Opc, |