kc3-lang/gnulib/doc/posix-headers/assert.texi

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  Date : 2019-09-22T23:23:20
  

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• doc/posix-headers/assert.texi

• @node assert.h
  @section @file{assert.h}
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html}
  
  Gnulib module: assert-h
  
  See also the Gnulib modules @code{assert} and @code{verify}.
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  On older platforms @code{static_assert} and @code{_Static_assert} do
  not allow the second string-literal argument to be omitted.  For
  example, GCC versions before 9.1 do not support the single-argument
  @code{static_assert} that was standardized by C2X and C++17.
  @item
  Even-older platforms do not support @code{static_assert} or
  @code{_Static_assert} at all.  For example, GCC versions before 4.6 do
  not support @code{_Static_assert}, and G++ versions before 4.3 do not
  support @code{static_assert}, which was standardized by C11 and C++11.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  C @code{_Static_assert} and C++ @code{static_assert}
  are keywords that can be used without including @code{<assert.h>}.
  The Gnulib substitutes are macros that require including @code{<assert.h>}.
  @item
  The C @code{static_assert} and @code{_Static_assert} can also
  be used within a @code{struct} or @code{union} specifier, in place of
  an ordinary declaration of a member of the struct or union.  The
  Gnulib substitute can be used only as an ordinary declaration.
  @item
  In C99 and later, @code{assert} can be applied to any scalar expression.
  In C89, the argument to @code{assert} is of type @code{int}.
  @end itemize
  

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