28375572f6
In ms-compatibility mode we inject static_assert macro definition if assert macro is defined. This is done by 8da090381d567d0ec555840f6b2a651d2997e4b3 for the sake of better diagnosing, in particular to emit a compatibility warning when static_assert keyword is used without inclusion of <assert.h>. Unfortunately it doesn't do a good job in c99 mode adding that macro unexpectedly for the users, so this patch removes macro injection and the diagnostics. --------- Co-authored-by: Corentin Jabot <corentinjabot@gmail.com>
130 lines
7.2 KiB
C
130 lines
7.2 KiB
C
// RUN: %clang_cc1 -std=c11 -Wgnu-folding-constant -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fms-compatibility -Wgnu-folding-constant -DMS -fsyntax-only -verify=expected,ms %s
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// RUN: %clang_cc1 -std=c99 -fms-compatibility -Wgnu-folding-constant -DMS -fsyntax-only -verify=expected,ms %s
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// RUN: %clang_cc1 -std=c99 -pedantic -Wgnu-folding-constant -fsyntax-only -verify=expected,ext %s
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// RUN: %clang_cc1 -xc++ -std=c++11 -pedantic -fsyntax-only -verify=expected,ext,cxx %s
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_Static_assert("foo", "string is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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#ifndef __cplusplus
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// expected-warning@-2 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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#endif
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_Static_assert(1, "1 is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static assertion failed: 0 is nonzero}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero");
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#endif
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void foo(void) {
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_Static_assert(1, "1 is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static assertion failed: 0 is nonzero}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero");
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#endif
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}
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_Static_assert(1, invalid); // ext-warning {{'_Static_assert' is a C11 extension}}
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#ifndef __cplusplus
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// expected-error@-2 {{expected string literal for diagnostic message in static_assert}}
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#endif
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// cxx-error@-4 {{use of undeclared identifier 'invalid'}}
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// cxx-warning@-5 {{'static_assert' with a user-generated message is a C++26 extension}}
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struct A {
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int a;
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_Static_assert(1, "1 is nonzero"); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, "0 is nonzero"); // expected-error {{static assertion failed: 0 is nonzero}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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#ifdef MS
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static_assert(1, "1 is nonzero");
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#endif
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};
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#ifdef __cplusplus
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#define ASSERT_IS_TYPE(T) __is_same(T, T)
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#else
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#define ASSERT_IS_TYPE(T) __builtin_types_compatible_p(T, T)
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#endif
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#define UNION(T1, T2) union { \
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__typeof__(T1) one; \
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__typeof__(T2) two; \
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_Static_assert(ASSERT_IS_TYPE(T1), "T1 is not a type"); \
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_Static_assert(ASSERT_IS_TYPE(T2), "T2 is not a type"); \
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_Static_assert(sizeof(T1) == sizeof(T2), "type size mismatch"); \
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}
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typedef UNION(unsigned, struct A) U1; // ext-warning 3 {{'_Static_assert' is a C11 extension}}
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UNION(char[2], short) u2 = { .one = { 'a', 'b' } }; // ext-warning 3 {{'_Static_assert' is a C11 extension}} cxx-warning {{designated initializers are a C++20 extension}}
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typedef UNION(char, short) U3; // expected-error {{static assertion failed due to requirement 'sizeof(char) == sizeof(short)': type size mismatch}} \
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// expected-note{{evaluates to '1 == 2'}} \
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// ext-warning 3 {{'_Static_assert' is a C11 extension}}
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typedef UNION(float, 0.5f) U4; // expected-error {{expected a type}} \
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// ext-warning 3 {{'_Static_assert' is a C11 extension}}
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// MSVC accepts static_assert in all language modes without including <assert.h>
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// and so do we in ms-compatibility mode. Unfortunately, there is no good way
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// to diagnose that with a pedantic warning. We'd have to track inclusion of
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// <assert.h> which is difficult when modules and PCH are involved. Adding
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// implicit definition of the macro causes unexpected results in c99 mode.
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#ifdef MS
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#if __STDC_VERSION__ < 201112L
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#if defined(static_assert)
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static_assert(0, "0 is nonzero"); // ok because we should not define static_assert
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// macro in c99.
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#endif
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static_assert(0, "0 is nonzero"); // ms-error {{static assertion failed: 0 is nonzero}}
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#endif
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#define assert(expr)
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static_assert(1, "1 is nonzero"); // ok
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#undef static_assert
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static_assert(1, "1 is nonzero"); // yes, still ok.
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#endif
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_Static_assert(1 , "") // expected-error {{expected ';' after '_Static_assert'}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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static int static_var;
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_Static_assert(&static_var != 0, ""); // ext-warning {{'_Static_assert' is a C11 extension}} \
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// expected-warning {{comparison of address of 'static_var' not equal to a null pointer is always true}}
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_Static_assert("" != 0, ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(("" != 0), ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(*"1", ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert("1"[0], ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(1.0 != 0, ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(__builtin_strlen("1"), ""); // ext-warning {{'_Static_assert' is a C11 extension}}
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#ifndef __cplusplus
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// expected-warning@-9 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// expected-warning@-8 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// expected-warning@-8 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// expected-warning@-8 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// expected-warning@-8 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// expected-warning@-8 {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
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// __builtin_strlen(literal) is considered an integer constant expression
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// and doesn't cause a pedantic warning
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#endif
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_Static_assert(0, L"\xFFFFFFFF"); // expected-warning {{encoding prefix 'L' on an unevaluated string literal has no effect}} \
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// expected-error {{invalid escape sequence '\xFFFFFFFF' in an unevaluated string literal}} \
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// expected-error {{hex escape sequence out of range}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, L"\u1234"); // expected-warning {{encoding prefix 'L' on an unevaluated string literal has no effect}} \
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// expected-error {{static assertion failed: ሴ}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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_Static_assert(0, L"\x1ff" // expected-warning {{encoding prefix 'L' on an unevaluated string literal has no effect}} \
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// expected-error {{hex escape sequence out of range}} \
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// expected-error {{invalid escape sequence '\x1ff' in an unevaluated string literal}} \
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// ext-warning {{'_Static_assert' is a C11 extension}}
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"0\x123" // expected-error {{invalid escape sequence '\x123' in an unevaluated string literal}}
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"fx\xfffff" // expected-error {{invalid escape sequence '\xfffff' in an unevaluated string literal}}
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"goop");
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