Add a LCP syntax highlighter for vim

Reviewers: buda, msantl, mtomic, mferencevic, ipaljak, mculinovic, vkasljevic, mpetricevic

Reviewed By: msantl

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1548

tools/vim-lcp/README.md

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+# vim-lcp
+
+Adds syntax highlighting of LCP files to vim. In the future the plugin may be
+extended with additional features, such as formatting, new editing commands etc.
+
+## Installation
+
+I'm assuming that you are using some kind of plugin manager in vim. If not,
+check out [Vundle](https://github.com/VundleVim/Vundle.vim).
+
+  ln -s <path-to-memgraph>/tools/vim-lcp ~/.vim/bundle/vim-lcp
+
+After symlinking, edit your `vimrc` by adding a `Plugin 'vim-lcp'` directive
+inside the `call vundle#begin() ... call vundle#end()` block.

tools/vim-lcp/ftdetect/lcp.vim

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+au! BufNewFile,BufRead *.lcp setfiletype lcp

tools/vim-lcp/syntax/lcp.vim

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+" Quit when a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+" Base LCP syntax on Lisp syntax
+runtime! syntax/lisp.vim
+unlet b:current_syntax
+
+" Include C++ syntax for inlined C++ code in LCP
+syntax include @CPP syntax/cpp.vim
+unlet b:current_syntax
+
+let b:current_syntax = "lcp"
+
+" Set the inline C++ region
+syntax region lcpCPPVar matchgroup=CPPVar start="\${" excludenl end="}" contained containedin=@CPP
+highlight link CPPVar SpecialComment
+syntax region lcpCPP containedin=lispList,lispBQList,lispAtomList matchgroup=CPPBlock start="#>cpp" end="cpp<#" contains=@CPP
+highlight link CPPBlock SpecialComment
+
+" Additional LCP keywords
+syntax keyword lcpKeyword contained containedin=lispAtomList,lispBQList,lispList lcp:define-class lcp:define-enum lcp:define-struct
+syntax keyword lcpKeyword contained containedin=lispAtomList,lispBQList,lispList lcp:namespace lcp:pop-namespace
+syntax keyword lcpKeyword contained containedin=lispAtomList,lispBQList,lispList lcp:capnp-namespace lcp:capnp-import lcp:capnp-type-conversion
+
+highlight link lcpKeyword lispFunc