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From: Andrea Monaco <andrea.monaco@autistici.org>
To: gcc@gcc.gnu.org
Subject: No type checking in ctype builtins
Date: Wed, 27 Apr 2022 17:29:03 +0200	[thread overview]
Message-ID: <87sfpy1r5s.fsf@autistici.org> (raw)


This program

  #include <ctype.h>

  int main ()
  {
    char *s;
    isspace (s);
  }

compiles with no warning in gcc 8.3.0, even though there's a type
mistake; the correct call would be isspace (*s).

The ctype functions are implemented as macros in glibc, so you can't
have type checking.  But they are also provided as builtins by gcc, so I
wonder why type checking is not performed in that case, either.



Thanks,

Andrea Monaco

             reply	other threads:[~2022-04-27 15:29 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-27 15:29 Andrea Monaco [this message]
2022-04-27 15:54 ` Andreas Schwab
2022-04-27 18:07   ` Andrea Monaco
2022-04-28 11:13   ` Florian Weimer
2022-04-27 16:19 ` Jonathan Wakely
2022-04-28 12:02   ` Eric Gallager

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