Add Rust lang support

ftplugin/rust.vim

@@ -0,0 +1,45 @@
+" Vim syntax file
+" Language:     Rust
+" Maintainer:   Chris Morgan <me@chrismorgan.info>
+" Last Change:  2013 Jul 10
+
+if exists("b:did_ftplugin")
+	finish
+endif
+let b:did_ftplugin = 1
+
+" The rust source code at present seems to typically omit a leader on /*!
+" comments, so we'll use that as our default, but make it easy to switch.
+" This does not affect indentation at all (I tested it with and without
+" leader), merely whether a leader is inserted by default or not.
+if exists("g:rust_bang_comment_leader") && g:rust_bang_comment_leader == 1
+	" Why is the `,s0:/*,mb:\ ,ex:*/` there, you ask? I don't understand why,
+	" but without it, */ gets indented one space even if there were no
+	" leaders. I'm fairly sure that's a Vim bug.
+	setlocal comments=s1:/*,mb:*,ex:*/,s0:/*,mb:\ ,ex:*/,:///,://!,://
+else
+	setlocal comments=s0:/*!,m:\ ,ex:*/,s1:/*,mb:*,ex:*/,:///,://!,://
+endif
+setlocal commentstring=//%s
+setlocal formatoptions-=t formatoptions+=croqnl
+" j was only added in 7.3.541, so stop complaints about its nonexistence
+silent! setlocal formatoptions+=j
+
+" This includeexpr isn't perfect, but it's a good start
+setlocal includeexpr=substitute(v:fname,'::','/','g')
+
+" NOT adding .rc as it's being phased out (0.7)
+setlocal suffixesadd=.rs
+
+if exists("g:ftplugin_rust_source_path")
+    let &l:path=g:ftplugin_rust_source_path . ',' . &l:path
+endif
+
+if exists("g:loaded_delimitMate")
+	if exists("b:delimitMate_excluded_regions")
+		let b:rust_original_delimitMate_excluded_regions = b:delimitMate_excluded_regions
+	endif
+	let b:delimitMate_excluded_regions = delimitMate#Get("excluded_regions") . ',rustLifetimeCandidate,rustGenericLifetimeCandidate'
+endif
+
+let b:undo_ftplugin = "setlocal formatoptions< comments< commentstring< includeexpr< suffixesadd< | if exists('b:rust_original_delimitMate_excluded_regions') | let b:delimitMate_excluded_regions = b:rust_original_delimitMate_excluded_regions | unlet b:rust_original_delimitMate_excluded_regions | elseif exists('b:delimitMate_excluded_regions') | unlet b:delimitMate_excluded_regions | endif"