Wow. I had heard of prototypes in Perl (and think they are indispensable in C programming), but hadn't read up on them. ++ to Aristotle
for his clear explanation (as well as others). Was there an RFC for the prototype feature in Perl that explains why it was implemented differently than C's prototypes?
In case there are non-C programmers out there, let me explain about C prototypes and why they're fantastic. For example, the string compare function strcmp has the following prototype:
int strcmp ( const char *s1, const char *s2 );
This means that you gotta call strcmp
with two char *
variables, and the variable you store the result in has gotta be an int
. Use anything else, and the compiler will issue a warning.
The difference already explained in numerous replies is that instead of complaining that there is a mis-match between the prototype and the call, Perl just 'fixes' the call. I wonder if there should be a use that enables a warning when Perl has 'fixed' something. Then again, that might only happen at run-time. Interesting question.
but my friends call me T.
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