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kakoune/rc/base/rust.kak
Tim Allen 8a9471ca5c rust.kak: Support Rust's raw-string syntax.
According to the Rust language reference[1], a raw string starts with an 'r',
zero or more '#' characters, and a '"', and doesn't close until a '"' is
immediately followed by the matching number of '#' characters.

[1]: https://doc.rust-lang.org/reference/tokens.html#raw-string-literals
2018-08-02 15:16:25 +10:00

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# http://rust-lang.org
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](rust|rs) %{
set-option buffer filetype 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/comment region -recurse /\* /\* \*/ fill comment
add-highlighter shared/rust/line_comment region // $ fill comment
add-highlighter shared/rust/code/ regex \b[A-z0-9_]+! 0:meta
# the number literals syntax is defined here:
# https://doc.rust-lang.org/reference.html#number-literals
add-highlighter shared/rust/code/ 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/ regex \b(?:&&|\|\|)\b 0:operator
# the language keywords are defined here, but many of them are reserved and unused yet:
# https://doc.rust-lang.org/grammar.html#keywords
add-highlighter shared/rust/code/ regex (?:#!?\[.*?\]) 0:meta
add-highlighter shared/rust/code/ regex \b(?:let|as|fn|return|match|if|else|loop|for|in|while|break|continue|move|box|where|impl|dyn|pub|unsafe)\b 0:keyword
add-highlighter shared/rust/code/ regex \b(?:trait|struct|enum|type|mut|ref|static|const)\b 0:attribute
add-highlighter shared/rust/code/ 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/ regex \b(?:mod|crate|use|extern)\b 0:module
add-highlighter shared/rust/code/ regex \$\w+\b 0:variable
add-highlighter shared/rust/code/ regex "'\\\\?.'" 0:value
add-highlighter shared/rust/code/ regex "('\w+)[^']" 1:meta
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden rust-filter-around-selections %{
# 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 %<
# copy // comments prefix and following white spaces
try %{ execute-keys -draft k <a-x> s ^\h*\K//[!/]?\h* <ret> y gh j P }
# preserve previous line indent
try %{ execute-keys -draft \; K <a-&> }
# filter previous line
try %{ execute-keys -draft k : rust-filter-around-selections <ret> }
# indent after lines ending with { or (
try %[ execute-keys -draft k <a-x> <a-k> [{(]\h*$ <ret> j <a-gt> ]
# align to opening paren of previous line
try %{ execute-keys -draft [( <a-k> \A\([^\n]+\n[^\n]*\n?\z <ret> s \A\(\h*.|.\z <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-&> ]
_
]
define-command -hidden rust-indent-on-closing-curly-brace %[
evaluate-commands -draft -itersel %_
# align to opening curly brace when alone on a line
try %[ execute-keys -draft <a-h> <a-k> ^\h+\}$ <ret> h m s \A|.\z <ret> 1<a-&> ]
_
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group rust-highlight global WinSetOption filetype=rust %{ add-highlighter window/rust ref rust }
hook global WinSetOption filetype=rust %[
hook window ModeChange insert:.* -group rust-hooks rust-filter-around-selections
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-curly-brace
]
hook -group rust-highlight global WinSetOption filetype=(?!rust).* %{ remove-highlighter window/rust }
hook global WinSetOption filetype=(?!rust).* %{
remove-hooks window rust-indent
remove-hooks window rust-hooks
}