cweb.vim (2892B)
1 " Vim syntax file 2 " Language: CWEB 3 " Maintainer: Andreas Scherer <andreas.scherer@pobox.com> 4 " Last Change: 2011 Dec 25 by Thilo Six 5 6 " Details of the CWEB language can be found in the article by Donald E. Knuth 7 " and Silvio Levy, "The CWEB System of Structured Documentation", included as 8 " file "cwebman.tex" in the standard CWEB distribution, available for 9 " anonymous ftp at ftp://labrea.stanford.edu/pub/cweb/. 10 11 " TODO: Section names and C/C++ comments should be treated as TeX material. 12 " TODO: The current version switches syntax highlighting off for section 13 " TODO: names, and leaves C/C++ comments as such. (On the other hand, 14 " TODO: switching to TeX mode in C/C++ comments might be colour overkill.) 15 16 " quit when a syntax file was already loaded 17 if exists("b:current_syntax") 18 finish 19 endif 20 21 " For starters, read the TeX syntax; TeX syntax items are allowed at the top 22 " level in the CWEB syntax, e.g., in the preamble. In general, a CWEB source 23 " code can be seen as a normal TeX document with some C/C++ material 24 " interspersed in certain defined regions. 25 runtime! syntax/tex.vim 26 unlet b:current_syntax 27 28 " Read the C/C++ syntax too; C/C++ syntax items are treated as such in the 29 " C/C++ section of a CWEB chunk or in inner C/C++ context in "|...|" groups. 30 syntax include @webIncludedC <sfile>:p:h/cpp.vim 31 32 let s:cpo_save = &cpo 33 set cpo&vim 34 35 " Inner C/C++ context (ICC) should be quite simple as it's comprised of 36 " material in "|...|"; however the naive definition for this region would 37 " hickup at the innocious "\|" TeX macro. Note: For the time being we expect 38 " that an ICC begins either at the start of a line or after some white space. 39 syntax region webInnerCcontext start="\(^\|[ \t\~`(]\)|" end="|" contains=@webIncludedC,webSectionName,webRestrictedTeX,webIgnoredStuff 40 41 " Genuine C/C++ material. This syntactic region covers both the definition 42 " part and the C/C++ part of a CWEB section; it is ended by the TeX part of 43 " the next section. 44 syntax region webCpart start="@[dfscp<(]" end="@[ \*]" contains=@webIncludedC,webSectionName,webRestrictedTeX,webIgnoredStuff 45 46 " Section names contain C/C++ material only in inner context. 47 syntax region webSectionName start="@[<(]" end="@>" contains=webInnerCcontext contained 48 49 " The contents of "control texts" is not treated as TeX material, because in 50 " non-trivial cases this completely clobbers the syntax recognition. Instead, 51 " we highlight these elements as "strings". 52 syntax region webRestrictedTeX start="@[\^\.:t=q]" end="@>" oneline 53 54 " Double-@ means single-@, anywhere in the CWEB source. (This allows e-mail 55 " address <someone@@fsf.org> without going into C/C++ mode.) 56 syntax match webIgnoredStuff "@@" 57 58 " Define the default highlighting. 59 " Only when an item doesn't have highlighting yet 60 61 hi def link webRestrictedTeX String 62 63 64 let b:current_syntax = "cweb" 65 66 let &cpo = s:cpo_save 67 unlet s:cpo_save 68 " vim: ts=8