Allow value expressions to gain access to option settings.

For example, "ledger eval options.limit" prints 0 (for false), but:
"ledger -l hello eval options.limit" print "hello"s, since the value of
options.limit, once set to a value, is that string.  For flag options,
such as -Y, eval prints 0 if unset, and 1 if set.

This feature allows value expressions to be conditionalized based on the
presence of user options.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/session.h b/src/session.h
index 89530cf1..a628454a 100644
--- a/src/session.h
+++ b/src/session.h
@@ -107,6 +107,8 @@ public:
     clean_accounts();
   }
 
+  option_t<session_t> * lookup_option(const char * p);
+
   virtual expr_t::ptr_op_t lookup(const string& name);
 
   /**