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" Vim syntax file
" filetype: ledger
" by Johann Klähn; Use according to the terms of the GPL>=2.
" by Stefan Karrmann; Use according to the terms of the GPL>=2.
" by Wolfgang Oertl; Use according to the terms of the GPL>=2.
" vim:ts=2:sw=2:sts=2:foldmethod=marker
if version < 600
syntax clear
elseif exists("b:current_sytax")
finish
endif
" for debugging
syntax clear
" DATE[=EDATE] [*|!] [(CODE)] DESC <-- first line of transaction
" ACCOUNT AMOUNT [; NOTE] <-- posting
syn region ledgerTransaction start=/^[[:digit:]~=]/ skip=/^\s/ end=/^/
\ fold keepend transparent
\ contains=ledgerTransactionDate,ledgerMetadata,ledgerPosting,ledgerTransactionExpression
syn match ledgerTransactionDate /^\d\S\+/ contained
syn match ledgerTransactionExpression /^[=~]\s\+\zs.*/ contained
syn match ledgerPosting /^\s\+[^[:blank:];][^;]*\ze\%($\|;\)/
\ contained transparent contains=ledgerAccount,ledgerMetadata
" every space in an account name shall be surrounded by two non-spaces
" every account name ends with a tab, two spaces or the end of the line
syn match ledgerAccount /^\s\+\zs\%(\S\@<= \S\|\S\)\+\ze\%( \|\t\|\s*$\)/ contained
syn region ledgerPreDeclaration start=/^\(account\|payee\|commodity\|tag\)/ skip=/^\s/ end=/^/
\ keepend transparent
\ contains=ledgerPreDeclarationType,ledgerPreDeclarationName,ledgerPreDeclarationDirective
syn match ledgerPreDeclarationType /^\(account\|payee\|commodity\|tag\)/ contained
syn match ledgerPreDeclarationName /^\S\+\s\+\zs.*/ contained
syn match ledgerPreDeclarationDirective /^\s\+\zs\S\+/ contained
syn match ledgerComment /^;.*$/
" comments at eol must be preceeded by at least 2 spaces / 1 tab
syn region ledgerMetadata start=/\%( \|\t\|^\s\+\);/ skip=/^\s\+;/ end=/^/
\ keepend contained contains=ledgerTag,ledgerTypedTag
syn match ledgerTag /:[^:]\+:/hs=s+1,he=e-1 contained
syn match ledgerTag /\%(\%(;\|^tag\)[^:]\+\)\@<=[^:]\+:\ze[^:]\+$/ contained
syn match ledgerTypedTag /\%(\%(;\|^tag\)[^:]\+\)\@<=[^:]\+::\ze[^:]\+$/ contained
syn region ledgerApply
\ matchgroup=ledgerStartApply start=/^apply\>/
\ matchgroup=ledgerEndApply end=/^end\s\+apply\>/
\ contains=ledgerApplyHead,ledgerApply,ledgerTransaction,ledgerComment
syn match ledgerApplyHead /\%(^apply\s\+\)\@<=\S.*$/ contained
highlight default link ledgerTransactionDate Constant
highlight default link ledgerTransactionExpression Statement
highlight default link ledgerMetadata Tag
highlight default link ledgerTypedTag Keyword
highlight default link ledgerTag Type
highlight default link ledgerStartApply Tag
highlight default link ledgerEndApply Tag
highlight default link ledgerApplyHead Type
highlight default link ledgerAccount Identifier
highlight default link ledgerPreDeclarationType Type
highlight default link ledgerPreDeclarationName Identifier
highlight default link ledgerPreDeclarationDirective Type
" syncinc is easy: search for the first transaction.
syn sync clear
syn sync match ledgerSync grouphere ledgerTransaction "^[[:digit:]~=]"
let b:current_syntax = "ledger"
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