rudimentary vim syntax file

diff --git a/cubicaltt.vim b/cubicaltt.vim
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+++ b/cubicaltt.vim
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+" Vim syntax file
+" Language:     cubicaltt
+" Author:       Carlo Angiuli
+" Last Change:  2017 November 6
+"
+" For https://github.com/mortberg/cubicaltt
+"
+" Move this file to ~/.vim/syntax/ and add the following line to your .vimrc:
+"   au BufNewFile,BufRead *.ctt setf cubicaltt
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn keyword cttKeyword hdata data import mutual let in split with module where
+syn keyword cttKeyword opaque transparent[] transparent_all
+syn keyword cttOperator U PathP comp transport fill Glue glue unglue Id idC idJ
+syn match   cttOperator '[:=|*_<>\-@]\|->\|\\\|\\/\|/\\'
+syn keyword cttUndef undefined
+
+syn region cttComment start="--" end="$"
+syn region cttComment start="{-" end="-}"
+
+hi def link cttKeyword Structure
+hi def link cttOperator Identifier
+hi def link cttUndef Todo
+hi def link cttComment Comment
+
+let b:current_syntax = "cubicaltt"