# http://rust-lang.org
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](rust|rs) %{
set-option buffer filetype rust
}
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook global WinSetOption filetype=rust %<
require-module rust
hook window ModeChange pop:insert:.* -group rust-trim-indent rust-trim-indent
hook window InsertChar \n -group rust-indent rust-indent-on-new-line
hook window InsertChar \{ -group rust-indent rust-indent-on-opening-curly-brace
hook window InsertChar [)}\]] -group rust-indent rust-indent-on-closing
hook -once -always window WinSetOption filetype=.* %{ remove-hooks window rust-.+ }
>
hook -group rust-highlight global WinSetOption filetype=rust %{
add-highlighter window/rust ref rust
hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/rust }
}
provide-module rust %§
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/rust regions
add-highlighter shared/rust/code default-region group
add-highlighter shared/rust/string region %{(?<!')"} (?<!\\)(\\\\)*" fill string
add-highlighter shared/rust/raw_string region -match-capture %{(?<!')r(#*)"} %{"(#*)} fill string
add-highlighter shared/rust/line_doctest region ^\h*//[!/]\h*```($|should_panic|no_run|ignore|allow_fail|rust|test_harness|compile_fail|E\d{4}|edition201[58]) ^\h*//[!/]\h*```$ regions
add-highlighter shared/rust/line_doctest/marker region ``` $ group
add-highlighter shared/rust/line_doctest/marker/fence regex ``` 0:meta
add-highlighter shared/rust/line_doctest/marker/keywords regex [\d\w] 0:meta # already matched above, just ignore comma
add-highlighter shared/rust/line_doctest/inner region '^\h*//[!/]( #(?= ))?' '$| ' group
add-highlighter shared/rust/line_doctest/inner/comment regex //[!/] 0:documentation
add-highlighter shared/rust/line_doctest/inner/hidden regex '#' 0:meta
add-highlighter shared/rust/line_doctest/code default-region ref rust
add-highlighter shared/rust/line_code_rest region ^\h*//[!/]\h*``` ^\h*//[!/]\h*```$ fill documentation # reset invalid doctest
add-highlighter shared/rust/line_comment2 region //[!/]{2} $ fill comment
add-highlighter shared/rust/line_doc region //[!/] $ fill documentation
add-highlighter shared/rust/line_comment1 region // $ group
add-highlighter shared/rust/line_comment1/comment fill comment
add-highlighter shared/rust/line_comment1/todo regex (TODO|NOTE|FIXME): 1:meta
add-highlighter shared/rust/block_comment2 region -recurse /\*\*\* /\*\*\* \*/ fill comment
add-highlighter shared/rust/block_doc region -recurse /\*\* /\*\* \*/ regions
add-highlighter shared/rust/block_doc/doctest region ```($|should_panic|no_run|ignore|allow_fail|rust|test_harness|compile_fail|E\d{4}|edition201[58]) ```$ regions
add-highlighter shared/rust/block_doc/doctest/marker region ``` $ group
add-highlighter shared/rust/block_doc/doctest/marker/fence regex ``` 0:meta
add-highlighter shared/rust/block_doc/doctest/marker/keywords regex [\d\w] 0:meta # already matched above, just ignore comma
add-highlighter shared/rust/block_doc/doctest/inner default-region group
add-highlighter shared/rust/block_doc/doctest/inner/hidden regex '^\h*\**\h*#' 0:meta
add-highlighter shared/rust/block_doc/doctest/inner/comment regex ^\h*\* 0:documentation
add-highlighter shared/rust/block_doc/doctest/inner/code ref rust
add-highlighter shared/rust/block_doc/code_rest region ``` ``` fill documentation
add-highlighter shared/rust/block_doc/doc default-region fill documentation
add-highlighter shared/rust/block_comment1 region -recurse /\* /\* \*/ group
add-highlighter shared/rust/block_comment1/comment fill comment
add-highlighter shared/rust/block_comment1/todo regex (TODO|NOTE|FIXME): 1:meta
add-highlighter shared/rust/macro_attributes region -recurse "\[" "#!?\[" "\]" regions
add-highlighter shared/rust/macro_attributes/ default-region fill meta
add-highlighter shared/rust/macro_attributes/string region %{(?<!')"} (?<!\\)(\\\\)*" fill string
add-highlighter shared/rust/macro_attributes/raw_string region -match-capture %{(?<!')r(#*)"} %{"(#*)} fill string
add-highlighter shared/rust/code/operators_arithmetic regex (\+|-|/|\*|=|\^|&|\||!|>|<|%)=? 0:operator
add-highlighter shared/rust/code/operators_as regex \bas\b 0:operator
add-highlighter shared/rust/code/ref_ref regex (&\h+[&~@*])[^)=\s\t\r\n] 1:type
add-highlighter shared/rust/code/ref regex ([&~@*])[^)=\s\t\r\n] 1:type
add-highlighter shared/rust/code/operators_logic regex &&|\|\| 0:operator
add-highlighter shared/rust/code/lifetime_or_loop_label regex ('([a-zA-Z]\w+|_\w+))\b 1:meta
add-highlighter shared/rust/code/namespace regex \b[a-zA-Z](\w+)?(\h+)?(?=::) 0:module
add-highlighter shared/rust/code/mod_path_sep regex :: 0:meta
add-highlighter shared/rust/code/question_mark regex \? 0:meta
# the language keywords are defined here, but many of them are reserved and unused yet:
# https://doc.rust-lang.org/reference/keywords.html
add-highlighter shared/rust/code/function_call regex _?[a-zA-Z]\w*\s*(?=\() 0:function
add-highlighter shared/rust/code/generic_function_call regex _?[a-zA-Z]\w*\s*(?=::<) 0:function
add-highlighter shared/rust/code/function_declaration regex (?:fn\h+)(_?\w+)(?:<[^>]+?>)?\( 1:function
add-highlighter shared/rust/code/keywords regex \b(?:as|break|continue|crate|else|enum|extern|false|fn|for|if|impl|in|let|loop|match|mod|pub|return|self|Self|struct|super|trait|true|type|unsafe|use|where|while|async|await|dyn|abstract|become|box|do|try)\b 0:keyword
add-highlighter shared/rust/code/storage regex \b(move|mut|ref|static|const)\b 0:type
add-highlighter shared/rust/code/pub_with_scope regex \b(pub)\h*(\()\h*(crate|super|self|in\h+[\w:]+)\h*(\)) 1:keyword 2:meta 4:meta
# after let can be an arbitrary pattern match
add-highlighter shared/rust/code/macro regex \b\w+! 0:meta
# the number literals syntax is defined here:
# https://doc.rust-lang.org/reference/tokens.html#numb ers
add-highlighter shared/rust/code/values regex \b(?:self|true|false|[0-9][_0-9]*(?:\.[0-9][_0-9]*|(?:\.[0-9][_0-9]*)?E[\+\-][_0-9]+)(?:f(?:32|64))?|(?:0x[_0-9a-fA-F]+|0o[_0-7]+|0b[_01]+|[0-9][_0-9]*)(?:(?:i|u|f)(?:8|16|32|64|128|size))?)\b 0:value
add-highlighter shared/rust/code/char_character regex "'([^\\]|\\(.|x[0-9a-fA-F]{2}|u\{[0-9a-fA-F]{1,6}\}))'" 0:green
# TODO highlight error for unicode or single escape by te character
add-highlighter shared/rust/code/byte_character regex b'([\x00-\x5B\x5D-\x7F]|\\(.|x[0-9a-fA-F]{2}))' 0:yellow
add-highlighter shared/rust/code/builtin_types regex \b(?:u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize|f32|f64|bool|char|str|Self)\b 0:type
add-highlighter shared/rust/code/return regex \breturn\b 0:meta
add-highlighter shared/rust/code/enum regex \b(Option|Result)\b 0:type
add-highlighter shared/rust/code/enum_variant regex \b(Some|None|Ok|Err)\b 0:value
add-highlighter shared/rust/code/std_traits regex \b(Copy|Send|Sized|Sync|Drop|Fn|FnMut|FnOnce|Box|ToOwned|Clone|PartialEq|PartialOrd|Eq|Ord|AsRef|AsMut|Into|From|Default|Iterator|Extend|IntoIterator|DoubleEndedIterator|ExactSizeIterator|SliceConcatExt|String|ToString|Vec)\b 0:type
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden rust-trim-indent %{
# remove trailing white spaces
try %{ execute-keys -draft -itersel <a-x> s \h+$ <ret> d }
}
define-command -hidden rust-indent-on-new-line %~
evaluate-commands -draft -itersel %@
try %{
try %[ # line comment
evaluate-commands -draft -save-regs '/"' %[
# copy the commenting prefix
execute-keys -save-regs '' k <a-x> s ^\h*//[!/]{0,2}\h* <ret> y
try %[
# if the previous comment isn't empty, create a new one
execute-keys <a-x><a-K>^\h*//[!/]{0,2}$<ret> j<a-x>s^\h*<ret>P
] catch %[
# TODO figure out a way to not delete empty comment in current line
# if there is no space and text in the previous comment, remove it completely
execute-keys s //.*<ret> d
]
]
] catch %[ # block comment
# if the previous line isn't within a comment scope, break
execute-keys -draft k<a-x> <a-k>^(\h*/\*|\h+\*(?!/))<ret>
# find comment opening, validate it was not closed, and check its using star prefixes
execute-keys -draft <a-?>/\*<ret><a-H> <a-K>\*/<ret> <a-k>\A\h*/\*([^\n]*\n\h*\*)*[^\n]*\n\h*.\z<ret>
try %[
# if the previous line is opening the comment, insert star preceeded by space
execute-keys -draft k<a-x><a-k>^\h*/\*<ret>
execute-keys -draft i*<space><esc>
] catch %[
try %[
# if the next line is a comment line insert a star
execute-keys -draft j<a-x><a-k>^\h+\*<ret>
execute-keys -draft i*<space><esc>
] catch %[
try %[
# if the previous line is an empty comment line, close the comment scope
execute-keys -draft k<a-x><a-k>^\h+\*\h+$<ret> <a-x>1s\*(\h*)<ret>c/<esc>
] catch %[
# if the previous line is a non-empty comment line, add a star
execute-keys -draft i*<space><esc>
]
]
]
# trim trailing whitespace on the previous line
try %[ execute-keys -draft s\h+$<ret> d ]
# align the new star with the previous one
execute-keys K<a-x>1s^[^*]*(\*)<ret>&
]
} catch %`
# re-indent previous line if it starts with where to match previous block
# string literal parsing within extern does not handle escape
try %% execute-keys -draft k <a-x> <a-k> ^\h*where\b <ret> hh <a-?> ^\h*\b(impl|((|pub\ |pub\((crate|self|super|in\ (::)?([a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)(::[a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)*)\)\ )((async\ |const\ )?(unsafe\ )?(extern\ ("[^"]*"\ )?)?fn|struct|enum|union)))\b <ret> <a-S> 1<a-&> %
# preserve previous line indent
try %{ execute-keys -draft <semicolon> K <a-&> }
# indent after lines ending with [{([].+ and move first parameter to own line
try %< execute-keys -draft [c[({[],[)}\]] <ret> <a-k> \A[({[][^\n]+\n[^\n]*\n?\z <ret> L i<ret><esc> <gt> <a-S> <a-&> >
# indent after non-empty lines not starting with operator and not ending with , or ; or {
# XXX simplify this into a single <a-k> without s
try %< execute-keys -draft k <a-x> s [^\h].+ <ret> <a-K> \A[-+*/&|^})<gt><lt>#] <ret> <a-K> [,<semicolon>{](\h*/[/*].*|)$ <ret> j <a-gt> >
# indent after lines ending with {
try %+ execute-keys -draft k <a-x> <a-k> \{$ <ret> j <a-gt> +
# dedent after lines starting with . and ending with } or ) or , or ; or .await (} or ) or .await maybe with ?)
try %_ execute-keys -draft k <a-x> <a-k> ^\h*\. <ret> <a-k> ([,<semicolon>]|(([})]|\.await)\?*))\h*$ <ret> j <a-lt> _
# dedent after lines ending with " => {}" - part of empty match
try %# execute-keys -draft k <a-x> <a-k> \ =>\ \{\}\h*$ <ret> j <a-lt> #
# align to opening curly brace or paren when newline is inserted before a single closing
try %< execute-keys -draft <a-h> <a-k> ^\h*[)}] <ret> h m <a-S> 1<a-&> >
# todo dedent additional unmatched parenthesis
# try %& execute-keys -draft k <a-x> s \((?:[^)(]+|\((?:[^)(]+|\([^)(]*\))*\))*\) l Gl s\) %sh{
# count previous selections length
# printf "j $(echo $kak_selections_length | wc -w) <a-lt>"
# } &
`
# filter previous line
try %{ execute-keys -draft k : rust-trim-indent <ret> }
@
~
define-command -hidden rust-indent-on-opening-curly-brace %[
evaluate-commands -draft -itersel %~
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ execute-keys -draft h <a-F> ) M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
# dedent standalone { after impl and related block without any { in between
try %@ execute-keys -draft hh <a-?> ^\h*\b(impl|((|pub\ |pub\((crate|self|super|in\ (::)?([a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)(::[a-zA-Z][a-zA-Z0-9_]*|_[a-zA-Z0-9_]+)*)\)\ )((async\ |const\ )?(unsafe\ )?(extern\ ("[^"]*"\ )?)?fn|struct|enum|union))|if|for)\b <ret> <a-K> \{ <ret> <a-semicolon> <semicolon> ll <a-x> <a-k> ^\h*\{$ <ret> <a-lt> @
~
]
define-command -hidden rust-indent-on-closing %~
evaluate-commands -draft -itersel %_
# align to opening curly brace or paren when alone on a line
try %< execute-keys -draft <a-h> <a-k> ^\h*[)}\]]$ <ret> h m <a-S> 1<a-&> >
_
~
§