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0e24686af4
https://cplusplus.github.io/CWG/issues/722.html nullptr passed to a variadic function now converted to void* in C++. This does not affect C23 nullptr. Also fixes -Wformat-pedantic so that it no longer warns for nullptr passed to %p (because it is converted to void* in C++ and it is allowed for va_arg(ap, void*) in C23)
54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
// RUN: %clang_cc1 -Wformat %s -verify
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// RUN: %clang_cc1 -Wformat -std=c23 %s -verify
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// RUN: %clang_cc1 -xc++ -Wformat %s -verify
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// RUN: %clang_cc1 -xobjective-c -Wformat -fblocks %s -verify
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// RUN: %clang_cc1 -xobjective-c++ -Wformat -fblocks %s -verify
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// RUN: %clang_cc1 -std=c23 -Wformat %s -pedantic -verify=expected,pedantic
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// RUN: %clang_cc1 -xc++ -Wformat %s -pedantic -verify=expected,pedantic
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// RUN: %clang_cc1 -xobjective-c -Wformat -fblocks -pedantic %s -verify=expected,pedantic
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__attribute__((__format__(__printf__, 1, 2)))
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int printf(const char *, ...);
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__attribute__((__format__(__scanf__, 1, 2)))
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int scanf(const char *, ...);
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void f(void *vp, const void *cvp, char *cp, signed char *scp, int *ip) {
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int arr[2];
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printf("%p", cp);
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printf("%p", cvp);
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printf("%p", vp);
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printf("%p", scp);
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printf("%p", ip); // pedantic-warning {{format specifies type 'void *' but the argument has type 'int *'}}
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printf("%p", arr); // pedantic-warning {{format specifies type 'void *' but the argument has type 'int *'}}
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scanf("%p", &vp);
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scanf("%p", &cvp);
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scanf("%p", (void *volatile*)&vp);
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scanf("%p", (const void *volatile*)&cvp);
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scanf("%p", &cp); // pedantic-warning {{format specifies type 'void **' but the argument has type 'char **'}}
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scanf("%p", &ip); // pedantic-warning {{format specifies type 'void **' but the argument has type 'int **'}}
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scanf("%p", &arr); // expected-warning {{format specifies type 'void **' but the argument has type 'int (*)[2]'}}
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#if !__is_identifier(nullptr)
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typedef __typeof__(nullptr) nullptr_t;
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nullptr_t np = nullptr;
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nullptr_t *npp = &np;
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printf("%p", np);
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scanf("%p", &np); // expected-warning {{format specifies type 'void **' but the argument has type 'nullptr_t *'}}
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scanf("%p", &npp); // pedantic-warning {{format specifies type 'void **' but the argument has type 'nullptr_t **'}}
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#endif
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#ifdef __OBJC__
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id i = 0;
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void (^b)(void) = ^{};
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printf("%p", i); // pedantic-warning {{format specifies type 'void *' but the argument has type 'id'}}
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printf("%p", b); // pedantic-warning {{format specifies type 'void *' but the argument has type 'void (^)(void)'}}
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scanf("%p", &i); // pedantic-warning {{format specifies type 'void **' but the argument has type 'id *'}}
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scanf("%p", &b); // pedantic-warning {{format specifies type 'void **' but the argument has type 'void (^*)(void)'}}
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#endif
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}
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