tree-sitter-objc/examples/SemaObjC/uninit-variables.m

57 lines
1.4 KiB
Objective-C

// RUN: %clang_cc1 -fsyntax-only -Wuninitialized -fsyntax-only -fblocks %s -verify
#include <stdarg.h>
@interface NSObject {} @end
@class NSString;
@interface NSException
+ (void)raise:(NSString *)name format:(NSString *)format, ...;
+ (void)raise:(NSString *)name format:(NSString *)format arguments:(va_list)argList;
- (void)raise;
@end
// Duplicated from uninit-variables.c.
// Test just to ensure the analysis is working.
int test1() {
int x; // expected-note{{initialize the variable 'x' to silence this warning}}
return x; // expected-warning{{variable 'x' is uninitialized when used here}}
}
// Test ObjC fast enumeration.
void test2() {
id collection = 0;
for (id obj in collection) {
if (0 == obj) // no-warning
break;
}
}
void test3() {
id collection = 0;
id obj;
for (obj in collection) { // no-warning
if (0 == obj) // no-warning
break;
}
}
int test_abort_on_exceptions(int y, NSException *e, NSString *s, int *z, ...) {
int x; // expected-note {{initialize the variable 'x' to silence this warning}}
if (y == 1) {
va_list alist;
va_start(alist, z);
[NSException raise:@"Blah" format:@"Blah %@" arguments:alist];
return x;
}
else if (y == 2) {
[NSException raise:@"Blah" format:s];
return x;
}
else if (y == 3) {
[e raise];
return x;
}
return x; // expected-warning {{variable 'x' is uninitialized when used here}}
}