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34 lines
1.2 KiB
Plaintext
34 lines
1.2 KiB
Plaintext
@node assert.h
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@section @file{assert.h}
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POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html}
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Gnulib module: assert-h
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See also the Gnulib module @code{assert}.
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Portability problems fixed by Gnulib:
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@itemize
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@item
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The C11 and C++11 @code{static_assert}, and the C11
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@code{_Static_assert}, are not supported by many platforms.
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For example, GCC versions before 4.6.0 do not support @code{_Static_assert},
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and G++ versions through at least 4.6.0 do not support @code{static_assert}.
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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C11 @code{_Static_assert} and C++11 @code{static_assert}
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are keywords that can be used without including @code{<assert.h>}.
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The Gnulib substitutes are macros that require including @code{<assert.h>}.
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@item
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The C11 @code{static_assert} and @code{_Static_assert} can also
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be used within a @code{struct} or @code{union} specifier, in place of
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an ordinary declaration of a member of the struct or union. The
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Gnulib substitute can be used only as an ordinary declaration.
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@item
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In C99, @code{assert} can be applied to any scalar expression.
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In C89, the argument to @code{assert} is of type @code{int}.
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@end itemize
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