# 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
<enter NAME> ... <leave>
<divert NAME> ... </divert>
# Pass 6: support tag
<asubst ...> ... </asubst>
[type=..] [src=...] [defer] [nohead] [nolang]>
# Resynchronize line numbers for more accurate pass 3 warnings
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.
This tag was primarily a shorthand for "<script
it has evolved. If the "<head>" tag is defined and is a
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.
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.