neovim/runtime/syntax/hcl.vim

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" Vim syntax file
" Language: HCL
" Maintainer: Gregory Anders
" Upstream: https://github.com/hashivim/vim-terraform
" Last Change: 2024-09-03
if exists('b:current_syntax')
finish
endif
syn iskeyword a-z,A-Z,48-57,_,-
syn case match
" A block is introduced by a type, some number of labels - which are either
" strings or identifiers - and an opening curly brace. Match the type.
syn match hclBlockType /^\s*\zs\K\k*\ze\s\+\(\("\K\k*"\|\K\k*\)\s\+\)*{/
" An attribute name is an identifier followed by an equals sign.
syn match hclAttributeAssignment /\(\K\k*\.\)*\K\k*\s\+=\s/ contains=hclAttributeName
syn match hclAttributeName /\<\K\k*\>/ contained
syn keyword hclValueBool true false
syn keyword hclTodo contained TODO FIXME XXX BUG
syn region hclComment start="/\*" end="\*/" contains=hclTodo,@Spell
syn region hclComment start="#" end="$" contains=hclTodo,@Spell
syn region hclComment start="//" end="$" contains=hclTodo,@Spell
""" misc.
syn match hclValueDec "\<[0-9]\+\([kKmMgG]b\?\)\?\>"
syn match hclValueHexaDec "\<0x[0-9a-f]\+\([kKmMgG]b\?\)\?\>"
syn match hclBraces "[\[\]]"
""" skip \" and \\ in strings.
syn region hclValueString start=/"/ skip=/\\\\\|\\"/ end=/"/ contains=hclStringInterp
syn region hclStringInterp matchgroup=hclBraces start=/\(^\|[^$]\)\$\zs{/ end=/}/ contained contains=ALLBUT,hclAttributeName
syn region hclHereDocText start=/<<-\?\z([a-z0-9A-Z]\+\)/ end=/^\s*\z1/ contains=hclStringInterp
"" Functions.
syn match hclFunction "[a-z0-9]\+(\@="
""" HCL2
syn keyword hclRepeat for in
syn keyword hclConditional if
syn keyword hclValueNull null
" enable block folding
syn region hclBlockBody matchgroup=hclBraces start="{" end="}" fold transparent
hi def link hclComment Comment
hi def link hclTodo Todo
hi def link hclBraces Delimiter
hi def link hclAttributeName Identifier
hi def link hclBlockType Type
hi def link hclValueBool Boolean
hi def link hclValueDec Number
hi def link hclValueHexaDec Number
hi def link hclValueString String
hi def link hclHereDocText String
hi def link hclFunction Function
hi def link hclRepeat Repeat
hi def link hclConditional Conditional
hi def link hclValueNull Constant
let b:current_syntax = 'hcl'