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;; A valuation function receives three arguments:
;;
;; 'source' A string identifying the commodity whose price
;; is being asked for (example: "EUR")
;;
;; 'date' The reference date the price should be relative.
;;
;; 'target' A string identifying the "target" commodity, or
;; the commodity the returned price should be in.
;; This argument is null if -V was used instead of -X.
;;
;; The valuation function should return an amount. If you've written your
;; function in Python, you can return something like Amount("$100"). If the
;; function returns an explicit value, that value is always used, regardless
;; of the commodity, the date, or the desired target commodity.
define myfunc_seven(s, d, t) = 7 EUR
;; In order to specific a fixed price, but still valuate that price into the
;; target commodity, use something like this:
define myfunc_five(s, d, t) = market(5 EUR, d, t)
;; The 'value' directive sets the valuation used for all commodities used in
;; the rest of the daat stream. This is the fallback, if nothing more
;; specific is found.
value myfunc_seven
;; You can set a specific valuation function on a per-commodity basis.
;; Instead of defining a function, you can also pass a lambda.
commodity $
value s, d, t -> 6 EUR
;; Each account can also provide a default valuation function for any
;; commodities transferred to that account.
account Expenses:Food5
value myfunc_five
;; The metadata field "Value", if found, overrides the valuation function on a
;; transaction-wide or per-posting basis.
= @XACT and Food
; Value:: 8 EUR
(Equity) $1
= @POST and Dining
(Expenses:Food9) $1
; Value:: 9 EUR
;; Lastly, you can specify the valuation function/value for any specific
;; amount using the (( )) commodity annotation.
2012-03-02 KFC
Expenses:Food2 $1 ((2 EUR))
Assets:Cash2
2012-03-03 KFC
Expenses:Food3 $1
; Value:: 3 EUR
Assets:Cash3
2012-03-04 KFC
; Value:: 4 EUR
Expenses:Food4 $1
Assets:Cash4
2012-03-05 KFC
Expenses:Food5 $1
Assets:Cash5
2012-03-06 KFC
Expenses:Food6 $1
Assets:Cash6
2012-03-07 KFC
Expenses:Food7 1 CAD
Assets:Cash7
2012-03-08 XACT
Expenses:Food8 $1
Assets:Cash8
2012-03-09 POST
Expenses:Dining9 $1
Assets:Cash9
test reg -V food
12-Mar-02 KFC Expenses:Food2 2 EUR 2 EUR
12-Mar-03 KFC Expenses:Food3 3 EUR 5 EUR
12-Mar-04 KFC Expenses:Food4 4 EUR 9 EUR
12-Mar-05 KFC Expenses:Food5 5 EUR 14 EUR
12-Mar-06 KFC Expenses:Food6 6 EUR 20 EUR
12-Mar-07 KFC Expenses:Food7 7 EUR 27 EUR
12-Mar-08 XACT Expenses:Food8 8 EUR 35 EUR
12-Mar-09 POST (Expenses:Food9) 9 EUR 44 EUR
end test
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