86 lines
4.2 KiB
VimL
86 lines
4.2 KiB
VimL
" Vim syntax file for Propane
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" Language: propane
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" Maintainer: Josh Holtrop
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" URL: https://github.com/holtrop/propane
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if exists("b:current_syntax")
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finish
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endif
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" Guess the language of the user code blocks from their contents so that the
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" matching syntax file can be included below. b:propane_subtype may also be set
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" before this file is sourced to select the language explicitly.
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if !exists("b:propane_subtype")
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" Rust markers. Each keyword requires the syntax that follows it in Rust so
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" that a plain identifier of the same name in another language does not match
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" (`int fn = 3;' in C, for example). Type names are only accepted within a
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" `ptype' statement for the same reason.
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let s:rust = '\<let\s\+\%(mut\s\+\)\?\w'
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let s:rust .= '\|\<fn\s\+\w\+\s*('
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let s:rust .= '\|&mut\>\|\<pub\s\+\w\|\<impl\s\+\w'
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let s:rust .= '\|#\[\|\<use\s\+\%(std\|core\)::'
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let s:rust .= '\|\<ptype\>[^;]*\<\%(isize\|usize\|i8\|i16\|i32\|i64\|i128'
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let s:rust .= '\|u8\|u16\|u32\|u64\|u128\|f32\|f64\|String\)\>'
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" D markers. These are spellings that have no valid C, C++, or Rust
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" equivalent, so `import' is deliberately not among them: it is a D keyword
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" but is also a C++20 module declaration.
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let s:d = '\<foreach\%(_reverse\)\?\s*([^)]*;'
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let s:d .= '\|\~=\|\<static\s\+if\s*(\|\<version\s*(\s*\w\+\s*)'
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let s:d .= '\|\<scope\s*(\s*\%(exit\|failure\|success\)\s*)'
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let s:d .= '\|\<\%(unittest\|mixin\|immutable\|__gshared\|invariant\)\>'
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let s:d .= '\|\<alias\s\+\w\+\s*=\|\<enum\s\+\w\+\s*='
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let s:d .= '\|@\%(property\|safe\|trusted\|system\|nogc\|disable\)\>'
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let s:d .= '\|\<is\s\+null\>\|\<cast\s*(\s*\w\+\s*)'
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let s:d .= '\|\<write\%(ln\|fln\|f\)\s*('
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let s:d .= '\|\<\%(dchar\|dstring\|wstring\|cent\|ucent\)\>'
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" A module import on its own is ambiguous between D and C++20, so only take
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" it as D when nothing else in the file looks like C++.
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let s:import = '\<import\s\+[A-Za-z_][A-Za-z0-9_.]*\s*;'
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let s:cpp = '::\|\<template\s*<\|\<namespace\>\|\<nullptr\>\|#include\s*[<"]'
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if search(s:rust, 'nw') > 0
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let b:propane_subtype = "rust"
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elseif search(s:d, 'nw') > 0
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let b:propane_subtype = "d"
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elseif search(s:import, 'nw') > 0 && search(s:cpp, 'nw') == 0
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let b:propane_subtype = "d"
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else
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let b:propane_subtype = "cpp"
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endif
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unlet s:rust s:d s:import s:cpp
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endif
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exe "syn include @propaneTarget syntax/".b:propane_subtype.".vim"
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syn region propaneTarget matchgroup=propaneDelimiter start="<<" end=">>$" contains=@propaneTarget keepend
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syn match propaneComment "#.*"
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syn match propaneFieldAlias ":[a-zA-Z0-9_]\+" contains=propaneFieldOperator
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syn match propaneFieldOperator ":" contained
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syn match propaneOperator "?"
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" The right-hand side of a rule (after '->' up to '<<' or ';') lists symbol
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" names that may coincide with propane keywords (e.g. 'start', 'token',
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" 'tree'). Wrap it in a region that excludes keyword matches so those names
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" are not highlighted as keywords. The '<<' is left unconsumed so the
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" propaneTarget region can still match it.
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syn region propaneRuleRhs matchgroup=propaneOperator start="->" end="\ze<<" end=";" contains=propaneFieldAlias,propaneRuleOperator,propaneComment keepend
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syn match propaneRuleOperator "?" contained
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" Keywords that introduce a user-defined name. The name is consumed by
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" propaneName via nextgroup so a name matching a keyword (e.g. 'token start')
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" is not highlighted as a keyword. These must be a match (not syn keyword)
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" because a syn keyword always wins over a contained nextgroup match.
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syn match propaneNameDecl "\<\%(tokenid\|token\|lex_fn\|module\|start\|tree_prefix\|tree_suffix\)\>" nextgroup=propaneName skipwhite
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syn match propaneName "\<\h\w*\>" contained
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syn match propaneKeyword "\<\%(context_user_fields\|drop\|free_token_node\|noline\|on_token_node\|prefix\|ptype\|token_user_fields\|tree\)\>"
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syn region propaneRegex start="/" end="/" skip="\v\\\\|\\/"
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hi def link propaneComment Comment
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hi def link propaneKeyword Keyword
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hi def link propaneNameDecl Keyword
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hi def link propaneRegex String
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hi def link propaneOperator Operator
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hi def link propaneRuleOperator Operator
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hi def link propaneFieldOperator Operator
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hi def link propaneDelimiter Delimiter
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hi def link propaneFieldAlias Identifier
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