Automated postings defer amount expression calculation

This allows for value expressions to be used which reference the
incoming posting, for example:

  = Income:Clients:
    (Liabilities:Taxes:VAT1)  (floor(amount) * 1)
    (Liabilities:Taxes:VAT2)  0.19

  2009/07/27 * Invoice
    Assets:Bank:Checking                           $1,190.45
    Income:Clients:ACME_Inc

The automated posting for VAT1 will use the floored amount multiplied by
a factor, while the posting for VAT2 multiples the whole amount as
before.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/post.h b/src/post.h
index addf0629..d9e50580 100644
--- a/src/post.h
+++ b/src/post.h
@@ -61,6 +61,7 @@ public:
   account_t *	     account;
 
   amount_t	     amount;	// can be null until finalization
+  optional<expr_t>   amount_expr;
   optional<amount_t> cost;
   optional<amount_t> assigned_amount;
 
@@ -212,6 +213,7 @@ private:
     ar & xact;
     ar & account;
     ar & amount;
+    ar & amount_expr;
     ar & cost;
     ar & assigned_amount;
   }