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MIT/X Consortium License

(C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the 
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in 
all copies or substantial portions of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
DEALINGS IN THE SOFTWARE.
" Vim syntax file
" Language:    mu
" Maintainer:  Kartik Agaram <mu@akkartik.com>
" URL:         http://github.com/akkartik/mu
" License:     public domain
"
" Copy this into your ftplugin directory, and add the following to your vimrc
" or to .vim/ftdetect/mu.vim:
"   autocmd BufReadPost,BufNewFile *.mu set filetype=mu

let s:save_cpo = &cpo
set cpo&vim

" todo: why does this periodically lose syntax, like on file reload?
"   $ vim x.mu
"   :e
"? if exists("b:syntax")
"?   finish
"? endif
"? let b:syntax = "mu"

setlocal iskeyword=@,48-57,?,!,_,$,-
setlocal formatoptions-=t  " Mu programs have long lines
setlocal formatoptions+=c  " but comments should still wrap

syntax match muComment /#.*$/  | highlight link muComment Comment
syntax match muSalientComment /##.*$/  | highlight link muSalientComment SalientComment
syntax match muComment /;.*$/  | highlight link muComment Comment
syntax match muSalientComment /;;.*$/  | highlight link muSalientComment SalientComment
set comments+=n:#
syntax match muCommentedCode "#? .*"  | highlight link muCommentedCode CommentedCode
let b:cmt_head = "#? "

syntax match muDelimiter "[{}]"  | highlight link muDelimiter Delimiter

" Mu strings are inside [ ... ] and can span multiple lines
" don't match '[' at end of line, that's usually code
syntax match muLiteral %^[^ a-zA-Z0-9(){}\[\]#$_*@&,=-][^ ,]*\|[ ,]\@<=[^ a-zA-Z0-9(){}\[\]#$_*@&,=-][^ ,]*%
syntax region muString start=+\[[^\]]+ end=+\]+
syntax match muString "\[\]"
highlight link muString String
" Mu syntax for representing the screen in scenarios
syntax region muScreen start=+ \.+ end=+\.$\|$+
highlight link muScreen muString

" Mu literals
syntax match muLiteral %[^ ]\+:literal/[^ ,]*\|[^ ]\+:literal\>%
syntax match muLiteral %\<[0-9-]\?[0-9]\+/[^ ,]*%
syntax match muLiteral % [0-9-]\?[0-9]\+[, ]\@=\| [0-9-]\?[0-9]\+$%
syntax match muLiteral "^\s\+[^ 0-9a-zA-Z{}$#\[\]][^ ]*\s*$"
" labels
syntax match muLiteral %[^ ]\+:label/[^ ,]*\|[^ ]\+:label\>%
" other literal types
syntax match muLiteral %[^ ]\+:type/[^ ,]*\|[^ ]\+:type\>%
syntax match muLiteral %[^ ]\+:offset/[^ ,]*\|[^ ]\+:offset\>%
syntax match muLiteral %[^ ]\+:variant/[^ ,]*\|[^ ]\+:variant\>%
syntax match muLiteral % true\(\/[^ ]*\)\?\| false\(\/[^ ]*\)\?%  " literals will never be the first word in an instruction
syntax match muLiteral % null\(\/[^ ]*\)\?%
highlight link muLiteral Constant

" sources of action at a distance
syntax match muAssign "<-"
syntax match muAssign "\<raw\>"
highlight link muAssign SpecialChar
syntax match muGlobal %[^ ]\+:global/\?[^ ,]*%  | highlight link muGlobal SpecialChar

" common keywords
" use regular expressions for common words that may come after '/'
syntax keyword muKeyword default-space local-scope
syntax keyword muKeyword next-input rewind-inputs load-inputs
syntax keyword muKeyword next-ingredient rewind-ingredients load-ingredients
syntax match muKeyword " input\>\| ingredient\>"
highlight link muKeyword Constant

syntax keyword muControl return return-if return-unless
syntax keyword muControl reply reply-if reply-unless
syntax keyword muControl output-if output-unless
syntax match muControl "^return\>\| return\>\|^reply\>\| reply\>\|^output\|^ output\>"
syntax keyword muControl jump-if jump-unless
syntax keyword muControl break-if break-unless
syntax keyword muControl loop-if loop-unless
syntax match muControl "^jump\>\| jump\>\|^break\>\| break\>\|^loop\>\| loop\>"
syntax keyword muControl start-running
syntax keyword muControl call-with-continuation-mark return-continuation-until-mark
highlight muControl ctermfg=3

syntax match muRecipe "->"
syntax match muRecipe "^recipe\>\|^def\>\|^before\>\|^after\>\| -> "
syntax keyword muRecipe recipe! def! function fn
highlight muRecipe ctermfg=208

syntax match muScenario "^scenario\>"  | highlight muScenario ctermfg=34
syntax keyword muPendingScenario pending-scenario  | highlight link muPendingScenario SpecialChar
syntax match muData "^type\>\|^container\>"
syntax keyword muData exclusive-container
highlight muData ctermfg=226

let &cpo = s:save_cpo