Merge pull request #737 from Jesse-Bakker/pvl-vim

Add vim plugin (syntax and filetype detection)

util/editors/vercorsPVL.vim/README.md

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+# A Vim plugin for PVL
+
+This is a Vim plugin providing filetype detection and syntax highlighting for 
+the Prototype Verification Language.
+
+## Installation
+
+Install using a vim package manager e.g. vim-plug: 
+
+```
+Plug 'utwente-fmt/vercors', {'rtp': 'util/editors/VercorsPVL.vim'}
+```
+
+or using vim's built-in package support:
+
+```
+git clone https://github.com/utwente-fmt/vercors.git
+mkdir -p ~/.vim/pack/plugins/start
+cp -r util/editors/VercorsPVL.vim ~/.vim/pack/plugins/start
+```

util/editors/vercorsPVL.vim/ftdetect/pvl.vim

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+autocmd! BufRead,BufNewFile *.pvl set filetype=pvl
+

util/editors/vercorsPVL.vim/syntax/pvl.vim

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+syn keyword pvlBool true false
+syn keyword pvlNull null
+syn keyword pvlThis this
+syn match pvlNumber display "[0-9]+"
+
+syn keyword pvlRepeat while for
+syn keyword pvlConditional if else goto
+
+syn keyword pvlStructure class nextgroup=pvlIdentifier skipwhite skipempty
+syn match pvlIdentifier "[A-Za-z][a-zA-Z0-9_]*" display contained
+syn match pvlOperator display "==\|!=\|&&\|||\|!\|<\|<=\|>\|>=\|+\|-\|*\|/\|\\/|++/|--\|==>\|**\|-*\|?\|:"
+
+syn keyword pvlType int boolean option process zfrac frac set seq bag
+syn keyword pvlStorage static local thread_local global
+syn keyword pvlKeyword kernel inline pure with then in id new unfolding return lock unlock wait notify fork join barrier par and vec void
+
+syn cluster pvlSpecInner contains=pvlSpecKeyword,pvlSpecKeywordSpecial,pvlSpecQuantifier
+syn keyword pvlSpecKeyword int boolean option process zfrac frac set seq bag modifies accessible requires ensures given yields invariant context loop_invariant create qed apply use create destroy split merge choose fold unfold open close assert assume inhale exhale label refute witness ghost send recv transfer csl_subject spec_ignore null Perm HPerm empty write false true Future AbstractState to from action atomic PointsTo Value contained
+syn match pvlSpecKeywordSpecial "\\result\|\\old" display contained
+syn match pvlSpecQuantifier "(" skipwhite nextgroup=pvlSpecQuantifierKeyword contained
+syn match pvlSpecQuantifierKeyword "\\forall\|\\exists" contained skipwhite nextgroup=pvlSpecQuantifierBody
+
+syn match pvlSpecQuantifierBody "\_[^;]*;\_[^;]*;\_[^)]*)" contained contains=@pvlSpecInner
+syn region pvlSpec matchgroup=pvlSpecStartKeyword start="resource\|modifies\|accessible\|requires\|ensures\|given\|yields\|invariant\|context_everywhere\|context\|loop_invariant\|create\|qed\|apply\|use\|create\|destroy\|split\|merge\|choose\|fold\|unfold\|open\|close\|assert\|assume\|inhale\|exhale\|label\|refute\|witness\|ghost\|send\|recv\|transfer\|csl_subject\|spec_ignore" end=";" contains=@pvlSpecInner
+
+syn region pvlSpecParens matchgroup=pvlSpecStartKeyword start="action *(\|atomic *(" end=")" contains=@pvlSpecInner
+syn region pvlCommentBlock start="/\*" end="\*/"
+syn region pvlCommentLine start="//" end="$"
+
+hi def link pvlCommentBlock pvlComment
+hi def link pvlCommentLine pvlComment
+
+hi def link pvlBool pvlConstant
+hi def link pvlNull pvlConstant
+hi def link pvlThis pvlConstant
+
+hi def link pvlComment Comment
+
+hi def link pvlConstant Constant
+hi def link pvlNumber Number
+hi def link pvlRepeat Repeat
+hi def link pvlConditional Conditional
+hi def link pvlStructure Structure
+hi def link pvlIdentifier Identifier
+hi def link pvlOperator Operator
+hi def link pvlType Type
+hi def link pvlStorage StorageClass
+hi def link pvlKeyword Keyword
+hi def link pvlSpecStartKeyword Special
+hi def link pvlSpec SpecialComment
+hi def link pvlSpecKeyword Keyword
+hi def link pvlSpecKeywordSpecial Macro
+hi def link pvlSpecQuantifierKeyword Macro