Anonymous user
Function prototype: Difference between revisions
m
→{{header|Perl}}
(D entry: D has function declarations.) |
|||
Line 149:
Other special forms are described in the User's Guide to the PARI library, section 5.7.3.
=={{header|Perl}}==
The perl scripting language allows prototypes to be checked during JIT compilation. Prototypes should be placed before subroutine definitions, declarations, or anonymous subroutines. The sigil [http://rosettacode.org/wiki/Special_characters#Perl|special symbols] act as argument type placeholders.
<lang perl>sub noargs(); # Declare a function with no arguments that returns an integer
sub twoargs($$); # Declare a function with two scalar arguments. The two sigils act as argument type placeholders
</lang>
=={{header|Perl 6}}==
There is no restriction on placement of prototype declarations. (Actually, we call them "stub declarations".) In fact, stub declarations are rarely needed in Perl 6 because post-declaration of functions is allowed, and normal function declarations do not bend the syntax the way they sometimes do in Perl 5.
| |||