wml::std::tags(3)
NAME
wml::std::tags - Standard Support Tags
SYNOPSIS
#use wml::std::tags
# Pass 2: advanced if constructs
<ifdef varname thenval elseval>
# Pass 3: support tag
<perl> ... </perl>
<say> ... </say>
# Pass 4: support tag
<m4> ... </m4>
# Pass 4: symbols
<symbol name value>
<symbol name undef>
# Pass 5: diversions
<dump NAME>
<enter NAME> ... <leave>
<divert NAME> ... </divert>
# Pass 6: support tag
<asubst ...> ... </asubst>
# Client-Side JavaScript: support tag
<javascript [version=..] [language=..]
[type=..] [src=...] [defer] [nohead] [nolang]>
...
</javascript>
# Resynchronize line numbers for more accurate pass 3 warnings
<sync-lines>
DESCRIPTION
- This include file defines some standard support tags one needs all the
time. All tags are self-explanatory and briefly mentioned in
wml_intro(1), except the last two which are described below. - "<javascript>":
- This tag was primarily a shorthand for "<script type="text/javascript"
language="JavaScript">" but it has evolved. If the "<head>" tag is
defined and is a complex macro, e.g. when calling "wml::std::page",
then Javascript code is automatically passed to this macro and should
be diverted to the HEAD section of HTML documents. This diversion
preserve lang slices in multi-lingual documents. Those features may be disabled by the ``nohead'' and ``nolang'' attributes. - "<sync-lines>":
- WML tries to print information on input file and line numbers when
warnings or errors are reported in passes 2 and 3. Some special
sentences containing file names and line numbers are inserted during
pass 1. So pass 2 have an accurate knowledge of where warnings appear
in input file. But it also filters it without preserving lines, so
after pass 2 information is almost unusable. By putting "<sync-lines>" in input file, it forces pass 2 to resynchronize information on line
numbers. So for debugging pass 3, it could be of some help to insert
"<sync-lines>" before ePerl code.
AUTHORS
Ralf S. Engelschall
rse@engelschall.com
www.engelschall.com
Denis Barbier
barbier@engelschall.com
REQUIRES
Internal: P1, P2, P3, P4, P6
External: -