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Improve various Vim syntax highlighting things.
- Implement comment nesting (the implementation is quite ugly at present and is not quite correct; note the big comment in that area). - Highlight invalid escape sequences as errors. - Fix up various inconsistencies and incorrectnesses in number highlighting. - Update prelude items (``std::io::{Buffer, Writer, Reader, Seek}``). - Highlight the ``proc`` keyword. - Remove %-formatting sequence highlighting (a relic of old formatting). - Don't highlight TODO in strings (it's unconventional).
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‎src/etc/vim/syntax/rust.vim‎

Lines changed: 42 additions & 36 deletions
Original file line numberDiff line numberDiff line change
@@ -3,7 +3,7 @@
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" Maintainer: Patrick Walton <pcwalton@mozilla.com>
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" Maintainer: Ben Blum <bblum@cs.cmu.edu>
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" Maintainer: Chris Morgan <me@chrismorgan.info>
6-
" Last Change: 2013 Oct 29
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" Last Change: 2013 Dec 04
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if version < 600
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syntax clear
@@ -28,6 +28,7 @@ syn keyword rustKeyword use nextgroup=rustModPath skipwhite
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" FIXME: Scoped impl's name is also fallen in this category
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syn keyword rustKeyword mod trait struct enum type nextgroup=rustIdentifier skipwhite
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syn keyword rustKeyword fn nextgroup=rustFuncName skipwhite
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syn keyword rustKeyword proc
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syn keyword rustStorage const mut ref static
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syn match rustIdentifier contains=rustIdentifierPrime "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
@@ -89,6 +90,7 @@ syn keyword rustTrait Orderable Signed Unsigned Round
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syn keyword rustTrait Primitive Int Float ToStrRadix ToPrimitive FromPrimitive
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syn keyword rustTrait GenericPath Path PosixPath WindowsPath
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syn keyword rustTrait RawPtr
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syn keyword rustTrait Buffer Writer Reader Seek
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syn keyword rustTrait SendStr SendStrOwned SendStrStatic IntoSendStr
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syn keyword rustTrait Str StrVector StrSlice OwnedStr
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syn keyword rustTrait IterBytes
@@ -143,38 +145,29 @@ syn match rustOperator display "&&\|||"
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syn match rustMacro '\w\(\w\)*!' contains=rustAssert,rustFail
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syn match rustMacro '#\w\(\w\)*' contains=rustAssert,rustFail
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146-
syn match rustFormat display "%\(\d\+\$\)\=[-+' #0*]*\(\d*\|\*\|\*\d\+\$\)\(\.\(\d*\|\*\|\*\d\+\$\)\)\=\([hlLjzt]\|ll\|hh\)\=\([aAbdiuoxXDOUfFeEgGcCsSpn?]\|\[\^\=.[^]]*\]\)" contained
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syn match rustFormat display "%%" contained
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syn match rustSpecialError display contained /\\./
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syn match rustSpecial display contained /\\\([nrt0\\'"]\|x\x\{2}\|u\x\{4}\|U\x\{8}\)/
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syn match rustStringContinuation display contained /\\\n\s*/
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syn region rustString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=rustTodo,rustFormat,rustSpecial,rustStringContinuation
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syn region rustString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=rustSpecial,rustSpecialError,rustStringContinuation
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syn region rustString start='r\z(#*\)"' end='"\z1'
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syn region rustAttribute start="#\[" end="\]" contains=rustString,rustDeriving
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syn region rustDeriving start="deriving(" end=")" contained contains=rustTrait
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" Number literals
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syn match rustNumber display "\<[0-9][0-9_]*\>"
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syn match rustNumber display "\<[0-9][0-9_]*\(u\|u8\|u16\|u32\|u64\)\>"
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syn match rustNumber display "\<[0-9][0-9_]*\(i\|i8\|i16\|i32\|i64\)\>"
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syn match rustHexNumber display "\<0x[a-fA-F0-9_]\+\>"
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syn match rustHexNumber display "\<0x[a-fA-F0-9_]\+\(u\|u8\|u16\|u32\|u64\)\>"
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syn match rustHexNumber display "\<0x[a-fA-F0-9_]\+\(i8\|i16\|i32\|i64\)\>"
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syn match rustOctNumber display "\<0o[0-7_]\+\>"
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syn match rustOctNumber display "\<0o[0-7_]\+\(u\|u8\|u16\|u32\|u64\)\>"
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syn match rustOctNumber display "\<0o[0-7_]\+\(i8\|i16\|i32\|i64\)\>"
167-
syn match rustBinNumber display "\<0b[01_]\+\>"
168-
syn match rustBinNumber display "\<0b[01_]\+\(u\|u8\|u16\|u32\|u64\)\>"
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syn match rustBinNumber display "\<0b[01_]\+\(i8\|i16\|i32\|i64\)\>"
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syn match rustFloat display "\<[0-9][0-9_]*\(f\|f32\|f64\)\>"
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syn match rustFloat display "\<[0-9][0-9_]*\([eE][+-]\=[0-9_]\+\)\>"
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syn match rustFloat display "\<[0-9][0-9_]*\([eE][+-]\=[0-9_]\+\)\(f\|f32\|f64\)\>"
174-
syn match rustFloat display "\<[0-9][0-9_]*\.[0-9_]\+\>"
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syn match rustFloat display "\<[0-9][0-9_]*\.[0-9_]\+\(f\|f32\|f64\)\>"
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syn match rustFloat display "\<[0-9][0-9_]*\.[0-9_]\+\%([eE][+-]\=[0-9_]\+\)\>"
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syn match rustFloat display "\<[0-9][0-9_]*\.[0-9_]\+\%([eE][+-]\=[0-9_]\+\)\(f\|f32\|f64\)\>"
158+
syn match rustDecNumber display "\<[0-9][0-9_]*\%([iu]\%(8\|16\|32\|64\)\=\)\="
159+
syn match rustHexNumber display "\<0x[a-fA-F0-9_]\+\%([iu]\%(8\|16\|32\|64\)\=\)\="
160+
syn match rustOctNumber display "\<0o[0-7_]\+\%([iu]\%(8\|16\|32\|64\)\=\)\="
161+
syn match rustBinNumber display "\<0b[01_]\+\%([iu]\%(8\|16\|32\|64\)\=\)\="
162+
163+
" To mark it as a float, it must have at least one of the three things integral values don't have:
164+
" a decimal point and more numbers; an exponent; and a type suffix.
165+
syn match rustFloat display "\<[0-9][0-9_]*\%(\.[0-9][0-9_]*\)\%([eE][+-]\=[0-9_]\+\)\=\(f32\|f64\)\="
166+
syn match rustFloat display "\<[0-9][0-9_]*\%(\.[0-9][0-9_]*\)\=\%([eE][+-]\=[0-9_]\+\)\(f32\|f64\)\="
167+
syn match rustFloat display "\<[0-9][0-9_]*\%(\.[0-9][0-9_]*\)\=\%([eE][+-]\=[0-9_]\+\)\=\(f32\|f64\)"
168+
" Special case for numbers of the form "1." which are float literals, unless followed by
169+
" an identifier, which makes them integer literals with a method call or field access.
170+
syn match rustFloat display "\<[0-9][0-9_]*\.\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\@!"
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" For the benefit of delimitMate
180173
syn region rustLifetimeCandidate display start=/&'\%(\([^'\\]\|\\\(['nrt0\\\"]\|x\x\{2}\|u\x\{4}\|U\x\{8}\)\)'\)\@!/ end=/[[:cntrl:][:space:][:punct:]]\@=\|$/ contains=rustSigil,rustLifetime
@@ -183,12 +176,24 @@ syn region rustGenericLifetimeCandidate display start=/\%(<\|,\s*\)\@<='/ end=/[
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"rustLifetime must appear before rustCharacter, or chars will get the lifetime highlighting
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syn match rustLifetime display "\'\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*"
186-
syn match rustCharacter /'\([^'\\]\|\\\([nrt0\\'"]\|x\x\{2}\|u\x\{4}\|U\x\{8}\)\)'/ contains=rustSpecial
187-
188-
syn region rustCommentML start="/\*" end="\*/" contains=rustTodo
189-
syn region rustComment start="//" end="$" contains=rustTodo keepend
190-
syn region rustCommentMLDoc start="/\*\%(!\|\*[*/]\@!\)" end="\*/" contains=rustTodo
191-
syn region rustCommentDoc start="//\%(//\@!\|!\)" end="$" contains=rustTodo keepend
179+
syn match rustCharacter /'\([^'\\]\|\\\(.\|x\x\{2}\|u\x\{4}\|U\x\{8}\)\)'/ contains=rustSpecial,rustSpecialError
180+
181+
syn cluster rustComment contains=rustCommentLine,rustCommentLineDoc,rustCommentBlock,rustCommentBlockDoc
182+
syn region rustCommentLine start="//" end="$" contains=rustTodo
183+
syn region rustCommentLineDoc start="//\%(//\@!\|!\)" end="$" contains=rustTodo
184+
syn region rustCommentBlock matchgroup=rustCommentBlock start="/\*\%(!\|\*[*/]\@!\)\@!" end="\*/" contains=rustTodo,@rustComment keepend extend
185+
syn region rustCommentBlockDoc matchgroup=rustCommentBlockDoc start="/\*\%(!\|\*[*/]\@!\)" end="\*/" contains=rustTodo,@rustComment keepend extend
186+
" FIXME: this is a really ugly and not fully correct implementation. Most
187+
" importantly, a case like ``/* */*`` should have the final ``*`` not being in
188+
" a comment, but in practice at present it leaves comments open two levels
189+
" deep. But as long as you stay away from that particular case, I *believe*
190+
" the highlighting is correct. Due to the way Vim's syntax engine works
191+
" (greedy for start matches, unlike Rust's tokeniser which is searching for
192+
" the earliest-starting match, start or end), I believe this cannot be solved.
193+
" Oh you who would fix it, don't bother with things like duplicating the Block
194+
" rules and putting ``\*\@<!`` at the start of them; it makes it worse, as
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" then you must deal with cases like ``/*/**/*/``. And don't try making it
196+
" worse with ``\%(/\@<!\*\)\@<!``, either...
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syn keyword rustTodo contained TODO FIXME XXX NB NOTE
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@@ -200,15 +205,16 @@ syn region rustFoldBraces start="{" end="}" transparent fold
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" It's not enabled by default as it would drive some people mad.
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202207
" Default highlighting {{{1
208+
hi def link rustDecNumber rustNumber
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hi def link rustHexNumber rustNumber
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hi def link rustOctNumber rustNumber
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hi def link rustBinNumber rustNumber
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hi def link rustIdentifierPrime rustIdentifier
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hi def link rustTrait rustType
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209215
hi def link rustSigil StorageClass
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hi def link rustFormat Special
211216
hi def link rustSpecial Special
217+
hi def link rustSpecialError Error
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hi def link rustStringContinuation Special
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hi def link rustString String
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hi def link rustCharacter Character
@@ -229,10 +235,10 @@ hi def link rustModPathSep Delimiter
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hi def link rustFunction Function
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hi def link rustFuncName Function
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hi def link rustFuncCall Function
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hi def link rustCommentMLDoc rustCommentDoc
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hi def link rustCommentDoc SpecialComment
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hi def link rustCommentML rustComment
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hi def link rustComment Comment
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hi def link rustCommentLine Comment
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hi def link rustCommentLineDoc SpecialComment
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hi def link rustCommentBlock rustCommentLine
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hi def link rustCommentBlockDoc rustCommentLineDoc
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hi def link rustAssert PreCondit
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hi def link rustFail PreCondit
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hi def link rustMacro Macro

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