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.IX Title "Vend::Interpolate 3pm"
.TH Vend::Interpolate 3pm "2016-08-31" "perl v5.22.2" "User Contributed Perl Documentation"
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.SH "NAME"
Vend::Interpolate \-\- Interchange tag interpolation routines
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
(no external use)
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The Vend::Interpolate contains the majority of the Interchange Tag
Language implementation rouines. Historically, it contained the entire
tag language implementation for MiniVend, accounting for its name.
.PP
It contains most of the handler routines pointed to by Vend::Parse, which
accepts the parsing output of Vend::Parser. (Vend::Parser was originally based
on HTML::Parser 1.x).
.PP
There are two interpolative parsers in Vend::Interpolate,
\&\fIiterate_array_list()\fR and \fIiterate_hash_list()\fR \*(-- these routines parse
the lists used in the widely employed [loop ..], [search\-region ...],
[item\-list], and [query ..] \s-1ITL\s0 tag constructs.
.PP
This module makes heavy use of precompiled regexes. You will notice variables
being used in the regular expression constructs. For example, \f(CW$All\fR is a
a synonym for \f(CW\*(C`(?s:.)*\*(C'\fR, \f(CW$Some\fR is equivalent to \f(CW\*(C`(?s:.)*?\*(C'\fR, etc.
This is not only for clarity of the regular expression, but for speed.