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Filename : rnoweb.vim
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" Vim syntax file
" Language:    R noweb Files
" Maintainer:  Johannes Ranke <jranke@uni-bremen.de>
" Last Change: Thu Apr 05, 2018  11:06PM
" Version:     0.9.1
" Remarks:     - This file is inspired by the proposal of 
"                Fernando Henrique Ferraz Pereira da Rosa <feferraz@ime.usp.br>
"                http://www.ime.usp.br/~feferraz/en/sweavevim.html
"

if exists("b:current_syntax")
  finish
endif 

syn case match

" Extension of Tex clusters {{{1
runtime syntax/tex.vim
unlet! b:current_syntax

syn cluster texMatchGroup add=@rnoweb
syn cluster texMathMatchGroup add=rnowebSexpr
syn cluster texMathZoneGroup add=rnowebSexpr
syn cluster texEnvGroup add=@rnoweb
syn cluster texFoldGroup add=@rnoweb
syn cluster texDocGroup add=@rnoweb
syn cluster texPartGroup add=@rnoweb
syn cluster texChapterGroup add=@rnoweb
syn cluster texSectionGroup add=@rnoweb
syn cluster texSubSectionGroup add=@rnoweb
syn cluster texSubSubSectionGroup add=@rnoweb
syn cluster texParaGroup add=@rnoweb

" Highlighting of R code using an existing r.vim syntax file if available {{{1
syn include @rnowebR syntax/r.vim
syn region rnowebChunk matchgroup=rnowebDelimiter start="^\s*<<.*>>=" matchgroup=rnowebDelimiter end="^@" contains=@rnowebR,rnowebChunkReference,rnowebChunk fold keepend
syn match rnowebChunkReference "^\s*<<.*>>$" contained
syn region rnowebSexpr matchgroup=Delimiter start="\\Sexpr{" matchgroup=Delimiter end="}" contains=@rnowebR contained

" Sweave options command {{{1
syn region rnowebSweaveopts matchgroup=Delimiter start="\\SweaveOpts{" matchgroup=Delimiter end="}"

" rnoweb Cluster {{{1
syn cluster rnoweb contains=rnowebChunk,rnowebChunkReference,rnowebDelimiter,rnowebSexpr,rnowebSweaveopts

" Highlighting {{{1
hi def link rnowebDelimiter	Delimiter
hi def link rnowebSweaveOpts Statement
hi def link rnowebChunkReference Delimiter

let   b:current_syntax = "rnoweb"
" vim: foldmethod=marker: