http://llvm.org/bugs/show_bug.cgi?id=16631
Bug ID: 16631
Summary: [objc] clang should recover better from missing method
bodies
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
I copied an "@implementation" section from a .h file and deleted all the method
bodies. I accidentally forgot to change "@implementation" to "@interface". This
confuses clang a lot:
Nicos-MacBook-Pro:src thakis$ cat test.mm
#import <Cocoa/Cocoa.h>
@interface A
@end
@implementation A (Foo)
- (void)doFoo:(NSString*)s;
@end
void f(A* a) {
[a doFoo:@"asdf"];
}
Nicos-MacBook-Pro:src thakis$ third_party/llvm-build/Release+Asserts/bin/clang
-c test.mm -Wextra
test.mm:7:27: warning: semicolon before method body is ignored
[-Wsemicolon-before-method-body]
- (void)doFoo:(NSString*)s;
^
test.mm:8:1: error: expected method body
@end
^
test.mm:11:4: error: use of undeclared identifier 'a'
[a doFoo:@"asdf"];
^
test.mm:7:26: warning: unused parameter 's' [-Wunused-parameter]
- (void)doFoo:(NSString*)s;
^
test.mm:12:2: error: missing '@end'
}
^
test.mm:6:1: note: implementation started here
@implementation A (Foo)
^
2 warnings and 3 errors generated.
If a method ends with a ';' and then isn't followed by '{', clang should diag
"expected body" and then continue parsing on the next line. Then this would
show only a single diag instead of more or less 1 for every source line after
the error.
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