Function prototype: Difference between revisions
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Other special forms are described in the User's Guide to the PARI library, section 5.7.3. |
Other special forms are described in the User's Guide to the PARI library, section 5.7.3. |
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=={{header|Perl}}== |
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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. |
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<lang perl>sub noargs(); # Declare a function with no arguments that returns an integer |
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sub twoargs($$); # Declare a function with two scalar arguments. The two sigils act as argument type placeholders |
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</lang> |
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=={{header|Perl 6}}== |
=={{header|Perl 6}}== |
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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. |
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. |
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