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vim: Handle box expressions specially

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Attempt to highlight the placement expression in a `box (expr) foo`
expression. Also treat GC as a keyword within the placement expression.

This doesn't work correctly for arbitrary expressions. Notably, this
makes no attempt at balancing delimiters. I believe handling that will
require rewriting the syntax rules to add a region for every pair of
delimiters. That may be a desirable thing to do in the end, because we
can then rewrite our indent rules based on the syntax and get rid of
cindent(), but for the time being, we'll just live with the limitation.
This commit is contained in:
Kevin Ballard 2014-05-20 14:11:07 -07:00
parent 229338d6ac
commit bf0c6d8166
1 changed files with 20 additions and 7 deletions
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27
src/etc/vim/syntax/rust.vim
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@ -18,27 +18,38 @@ syn keyword rustOperator as
syn match rustAssert "\<assert\(\w\)*!" contained
syn match rustFail "\<fail\(\w\)*!" contained
syn keyword rustKeyword break box continue
syn keyword rustKeyword extern nextgroup=rustExternCrate,rustObsoleteExternMod skipwhite
syn keyword rustKeyword break
syn keyword rustKeyword box nextgroup=rustBoxPlacement skipwhite skipempty
syn keyword rustKeyword continue
syn keyword rustKeyword extern nextgroup=rustExternCrate,rustObsoleteExternMod skipwhite skipempty
syn keyword rustKeyword fn nextgroup=rustFuncName skipwhite skipempty
syn keyword rustKeyword for in if impl let
syn keyword rustKeyword loop once proc pub
syn keyword rustKeyword return super
syn keyword rustKeyword unsafe virtual while
syn keyword rustKeyword use nextgroup=rustModPath skipwhite
syn keyword rustKeyword use nextgroup=rustModPath skipwhite skipempty
" FIXME: Scoped impl's name is also fallen in this category
syn keyword rustKeyword mod trait struct enum type nextgroup=rustIdentifier skipwhite
syn keyword rustKeyword fn nextgroup=rustFuncName skipwhite
syn keyword rustKeyword mod trait struct enum type nextgroup=rustIdentifier skipwhite skipempty
syn keyword rustStorage mut ref static
syn keyword rustObsoleteStorage const
syn keyword rustInvalidBareKeyword crate
syn keyword rustExternCrate crate contained nextgroup=rustIdentifier skipwhite
syn keyword rustObsoleteExternMod mod contained nextgroup=rustIdentifier skipwhite
syn keyword rustExternCrate crate contained nextgroup=rustIdentifier skipwhite skipempty
syn keyword rustObsoleteExternMod mod contained nextgroup=rustIdentifier skipwhite skipempty
syn match rustIdentifier contains=rustIdentifierPrime "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
syn match rustFuncName "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
syn region rustBoxPlacement matchgroup=rustBoxPlacementParens start="(" end=")" contains=TOP contained
syn keyword rustBoxPlacementExpr GC containedin=rustBoxPlacement
" Ideally we'd have syntax rules set up to match arbitrary expressions. Since
" we don't, we'll just define temporary contained rules to handle balancing
" delimiters.
syn region rustBoxPlacementBalance start="(" end=")" containedin=rustBoxPlacement transparent
syn region rustBoxPlacementBalance start="\[" end="\]" containedin=rustBoxPlacement transparent
" {} are handled by rustFoldBraces
" Reserved (but not yet used) keywords {{{2
syn keyword rustReservedKeyword alignof be do offsetof priv pure sizeof typeof unsized yield
@ -244,6 +255,8 @@ hi def link rustLifetime Special
hi def link rustInvalidBareKeyword Error
hi def link rustExternCrate rustKeyword
hi def link rustObsoleteExternMod Error
hi def link rustBoxPlacementParens Delimiter
hi def link rustBoxPlacementExpr rustKeyword
" Other Suggestions:
" hi rustAttribute ctermfg=cyan