" Vim syntax file" Language:	CWEB" Maintainer:	Andreas Scherer <andreas.scherer@pobox.com>" Last Change:	April 30, 2001 " Details of the CWEB language can be found in the article by Donald E. Knuth" and Silvio Levy, "The CWEB System of Structured Documentation", included as" file "cwebman.tex" in the standard CWEB distribution, available for" anonymous ftp at ftp://labrea.stanford.edu/pub/cweb/. " TODO: Section names and C/C++ comments should be treated as TeX material." TODO: The current version switches syntax highlighting off for section" TODO: names, and leaves C/C++ comments as such. (On the other hand," TODO: switching to TeX mode in C/C++ comments might be colour overkill.) " For version 5.x: Clear all syntax items" For version 6.x: Quit when a syntax file was already loadedif version < 600  syntax clearelseif exists("b:current_syntax")  finishendif " For starters, read the TeX syntax; TeX syntax items are allowed at the top" level in the CWEB syntax, e.g., in the preamble.  In general, a CWEB source" code can be seen as a normal TeX document with some C/C++ material" interspersed in certain defined regions.if version < 600  source <sfile>:p:h/tex.vimelse  runtime! syntax/tex.vim  unlet b:current_syntaxendif " Read the C/C++ syntax too; C/C++ syntax items are treated as such in the" C/C++ section of a CWEB chunk or in inner C/C++ context in "|...|" groups.syntax include @webIncludedC <sfile>:p:h/cpp.vim " Inner C/C++ context (ICC) should be quite simple as it's comprised of" material in "|...|"; however the naive definition for this region would" hickup at the innocious "\|" TeX macro.  Note: For the time being we expect" that an ICC begins either at the start of a line or after some white space.syntax region webInnerCcontext start="\(^\|[ \t\~`(]\)|" end="|" contains=@webIncludedC,webSectionName,webRestrictedTeX,webIgnoredStuff " Genuine C/C++ material.  This syntactic region covers both the definition" part and the C/C++ part of a CWEB section; it is ended by the TeX part of" the next section.syntax region webCpart start="@[dfscp<(]" end="@[ \*]" contains=@webIncludedC,webSectionName,webRestrictedTeX,webIgnoredStuff " Section names contain C/C++ material only in inner context.syntax region webSectionName start="@[<(]" end="@>" contains=webInnerCcontext contained " The contents of "control texts" is not treated as TeX material, because in" non-trivial cases this completely clobbers the syntax recognition.  Instead," we highlight these elements as "strings".syntax region webRestrictedTeX start="@[\^\.:t=q]" end="@>" oneline " Double-@ means single-@, anywhere in the CWEB source.  (This allows e-mail" address <someone@@fsf.org> without going into C/C++ mode.)syntax match webIgnoredStuff "@@" " Define the default highlighting." For version 5.7 and earlier: only when not done already" For version 5.8 and later: only when an item doesn't have highlighting yetif version >= 508 || !exists("did_cweb_syntax_inits")  if version < 508    let did_cweb_syntax_inits = 1    command -nargs=+ HiLink hi link <args>  else    command -nargs=+ HiLink hi def link <args>  endif   HiLink webRestrictedTeX String   delcommand HiLinkendif let b:current_syntax = "cweb" " vim: ts=8