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.\" ========================================================================
.\"
.IX Title "PPI::Token::Prototype 3pm"
.TH PPI::Token::Prototype 3pm "2014-08-16" "perl v5.20.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
PPI::Token::Prototype \- A subroutine prototype descriptor
.SH "INHERITANCE"
.IX Header "INHERITANCE"
.Vb 3
\&  PPI::Token::End
\&  isa PPI::Token
\&      isa PPI::Element
.Ve
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  sub ($@) prototype;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Although it sort of looks like a list or condition, a subroutine
prototype is a lot more like a string. Its job is to provide hints
to the perl compiler on what type of arguments a particular subroutine
expects, which the compiler uses to validate parameters at compile-time,
and allows programmers to use the functions without explicit parameter
braces.
.PP
Due to the rise of \s-1OO\s0 Perl coding, which ignores these prototypes, they
are most often used to allow for constant-like things, and to \*(L"extend\*(R"
the language and create things that act like keywords and core functions.
.PP
.Vb 2
\&  # Create something that acts like a constant
\&  sub MYCONSTANT () { 10 }
\&  
\&  # Create the "any" core\-looking function
\&  sub any (&@) { ... }
\&  
\&  if ( any { $_\->cute } @babies ) {
\&        ...
\&  }
.Ve
.SH "METHODS"
.IX Header "METHODS"
This class provides one additional method beyond those defined by the
PPI::Token and PPI::Element parent classes.
.SS "prototype"
.IX Subsection "prototype"
The \f(CW\*(C`prototype\*(C'\fR accessor returns the actual prototype pattern, stripped
of braces and any whitespace inside the pattern.
.SH "SUPPORT"
.IX Header "SUPPORT"
See the support section in the main module.
.SH "AUTHOR"
.IX Header "AUTHOR"
Adam Kennedy <adamk@cpan.org>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2001 \- 2011 Adam Kennedy.
.PP
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
.PP
The full text of the license can be found in the
\&\s-1LICENSE\s0 file included with this module.