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Allow for a GCC cast extension. 

Fixes part of <rdar://problem/5980829> clang on xcode: used type 'NSRange' where arithmetic or pointer type is required.

llvm-svn: 51900
This commit is contained in:
Steve Naroff 2008-06-03 12:56:35 +00:00
parent 2dd8fdc78a
commit 1ba306cde5
2 changed files with 12 additions and 3 deletions
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2
clang/include/clang/Basic/DiagnosticKinds.def
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@ -922,6 +922,8 @@ DIAG(err_typecheck_cond_expect_scalar, ERROR,
"used type '%0' where arithmetic or pointer type is required")
DIAG(ext_typecheck_cond_one_void, EXTENSION,
"C99 forbids conditional expressions with only one void side")
DIAG(ext_typecheck_cast_nonscalar, EXTENSION,
"C99 forbids casting nonscalar to the same type")
DIAG(err_typecheck_expect_scalar_operand, ERROR,
"operand of type '%0' where arithmetic or pointer type is required")
DIAG(err_typecheck_cond_incompatible_operands, ERROR,

13
clang/lib/Sema/SemaExpr.cpp
View File

@ -845,9 +845,16 @@ ActOnCastExpr(SourceLocation LParenLoc, TypeTy *Ty,
// C99 6.5.4p2: the cast type needs to be void or scalar and the expression
// type needs to be scalar.
if (!castType->isVoidType()) { // Cast to void allows any expr type.
if (!castType->isScalarType() && !castType->isVectorType())
return Diag(LParenLoc, diag::err_typecheck_cond_expect_scalar,
castType.getAsString(), SourceRange(LParenLoc, RParenLoc));
if (!castType->isScalarType() && !castType->isVectorType()) {
// GCC struct/union extension.
if (castType == castExpr->getType() &&
castType->isStructureType() || castType->isUnionType())
return Diag(LParenLoc, diag::ext_typecheck_cast_nonscalar,
SourceRange(LParenLoc, RParenLoc));
else
return Diag(LParenLoc, diag::err_typecheck_cond_expect_scalar,
castType.getAsString(), SourceRange(LParenLoc, RParenLoc));
}
if (!castExpr->getType()->isScalarType() &&
!castExpr->getType()->isVectorType())
return Diag(castExpr->getLocStart(),