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(require 'rx)
(defconst ledger-regex-date
(let ((sep '(or ?- (any ?. ?/)))) ; can't do (any ?- ?. ?/) due to bug
(rx (group
(and (? (= 4 num)
(eval sep))
(and num (? num))
(eval sep)
(and num (? num))))))
"Match a single date, in its 'written' form.")
(defconst ledger-regex-date-group 1)
(defconst ledger-regex-date-group--count 1)
(defconst ledger-regex-full-date
(macroexpand
`(rx (and (regexp ,ledger-regex-date)
(? (and ?= (regexp ,ledger-regex-date))))))
"Match a compound date, of the form ACTUAL=EFFECTIVE")
(defconst ledger-regex-full-date-group-actual
ledger-regex-date-group)
(defconst ledger-regex-full-date-group-effective
(+ ledger-regex-date-group--count
ledger-regex-date-group))
(defconst ledger-regex-full-date-group--count
(* 2 ledger-regex-date-group--count))
(defconst ledger-regex-state
(rx (group (any ?! ?*))))
(defconst ledger-regex-state-group 1)
(defconst ledger-regex-state-group--count 1)
(defconst ledger-regex-code
(rx (and ?\( (group (+? (not (any ?\))))) ?\))))
(defconst ledger-regex-code-group 1)
(defconst ledger-regex-code-group--count 1)
(defconst ledger-regex-long-space
(rx (and (*? space)
(or (and ? (or ? ?\t)) ?\t))))
(defconst ledger-regex-note
(rx (group (+ nonl))))
(defconst ledger-regex-note-group 1)
(defconst ledger-regex-note-group--count 1)
(defconst ledger-regex-end-note
(macroexpand `(rx (and (regexp ,ledger-regex-long-space) ?\;
(regexp ,ledger-regex-note)))))
(defconst ledger-regex-end-note-group
ledger-regex-note-group)
(defconst ledger-regex-end-note-group--count
ledger-regex-note-group--count)
(defconst ledger-regex-full-note
(macroexpand `(rx (and line-start (+ space)
?\; (regexp ,ledger-regex-note)))))
(defconst ledger-regex-full-note-group
ledger-regex-note-group)
(defconst ledger-regex-full-note-group--count
ledger-regex-note-group--count)
(defconst ledger-regex-xact-line
(macroexpand
`(rx (and line-start
(regexp ,ledger-regex-full-date)
(? (and (+ space) (regexp ,ledger-regex-state)))
(? (and (+ space) (regexp ,ledger-regex-code)))
(+ space) (+? nonl)
(? (regexp ,ledger-regex-end-note))
line-end))))
(defconst ledger-regex-xact-line-group-actual-date
ledger-regex-full-date-group-actual)
(defconst ledger-regex-xact-line-group-effective-date
ledger-regex-full-date-group-effective)
(defconst ledger-regex-xact-line-group-state
(+ ledger-regex-full-date-group--count
ledger-regex-state-group))
(defconst ledger-regex-xact-line-group-code
(+ ledger-regex-full-date-group--count
ledger-regex-state-group--count
ledger-regex-code-group))
(defconst ledger-regex-xact-line-group-note
(+ ledger-regex-full-date-group--count
ledger-regex-state-group--count
ledger-regex-code-group--count
ledger-regex-note-group))
(defconst ledger-regex-full-note-group--count
(+ ledger-regex-full-date-group--count
ledger-regex-state-group--count
ledger-regex-code-group--count
ledger-regex-note-group--count))
(defun ledger-regex-xact-line-actual-date
(&optional string)
(match-string ledger-regex-xact-line-group-actual-date string))
(defconst ledger-regex-account
(rx (group (and (not (any ?:)) (*? nonl)))))
(defconst ledger-regex-full-account
(macroexpand
`(rx (and (group (? (any ?\[ ?\))))
(regexp ,ledger-regex-account)
(? (any ?\] ?\)))))))
(defconst ledger-regex-commodity
(rx (or (and ?\" (+ (not (any ?\"))) ?\")
(not (any space ?\n
digit
?- ?\[ ?\]
?. ?, ?\; ?+ ?* ?/ ?^ ?? ?: ?& ?| ?! ?=
?\< ?\> ?\{ ?\} ?\( ?\) ?@)))))
(defconst ledger-regex-amount
(rx (and (? ?-)
(and (+ digit)
(*? (and (any ?. ?,) (+ digit))))
(? (and (any ?. ?,) (+ digit))))))
(defconst ledger-regex-commoditized-amount
(macroexpand
`(rx (or (and (regexp ,ledger-regex-commodity)
(*? space)
(regexp ,ledger-regex-amount))
(and (regexp ,ledger-regex-amount)
(*? space)
(regexp ,ledger-regex-commodity))))))
(defconst ledger-regex-commodity-annotations
(macroexpand
`(rx (* (+ space)
(or (and ?\{ (regexp ,ledger-regex-commoditized-amount) ?\})
(and ?\[ (regexp ,ledger-regex-date) ?\])
(and ?\( (not (any ?\))) ?\)))))))
(defconst ledger-regex-cost
(macroexpand
`(rx (and (or "@" "@@") (+ space)
(regexp ,ledger-regex-commoditized-amount)))))
(defconst ledger-regex-balance-assertion
(macroexpand
`(rx (and ?= (+ space)
(regexp ,ledger-regex-commoditized-amount)))))
(defconst ledger-regex-full-amount
(macroexpand `(rx (group (+? (not (any ?\;)))))))
(defconst ledger-regex-post-line
(macroexpand
`(rx (and line-start
(? (and (+ space) (regexp ,ledger-regex-state)))
(+ space) (regexp ,ledger-regex-full-account)
(+ space) (regexp ,ledger-regex-full-amount)
(? (regexp ,ledger-regex-end-note))
line-end))))
(provide 'ldg-regex)
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