Hidden Gems in C99 (1)
After some late night reading of the C99 spec, I’ve found quite a few hidden gems. I’m going to start posting some of these. Since it’s late, I’ll just post a teaser.
On page 64 of the C99 standard it says:
In all aspects of the language, the six tokens
<: :> <% %> %: %:%:behave,respectively,the same as the six tokens
[ ] { } # ##except for their spelling.
Really? Then let’s try this program:
%:include <stdio .h> int main(int argc, char *argv<::>) <% printf("hello world\n"); %>
Compile it an run it:
dirac src $ gcc main.c dirac src $ ./a.out hello world
Whaddaya know… I know, I know… useless. Wait for the next post then.
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Ramblings » Blog Archive » Another useless C99 tidbit
13 Apr 08 at 11:50 pm
Me imagino que son iguales que los trigraphs del estándar viejo…para los teclados sin caracteres especiales?
efutch
1 Feb 09 at 8:25 pm