Added a --prepend-format option

This lets you, for example, debug registers that cull data from many
different sources, without having to change the basic formatting
string.  You can locate each posting's location with this:

  ledger reg --prepend-format='%-25(filename + ":" + beg_line)'

1 files changed, 6 insertions, 2 deletions

diff --git a/src/output.h b/src/output.h
index fedd08ff..778a9335 100644
--- a/src/output.h
+++ b/src/output.h
@@ -60,13 +60,15 @@ protected:
   format_t  first_line_format;
   format_t  next_lines_format;
   format_t  between_format;
+  format_t  prepend_format;
   xact_t *  last_xact;
   post_t *  last_post;
   bool      print_raw;
 
 public:
   format_posts(report_t& _report, const string& format,
-	       bool _print_raw = false);
+	       bool _print_raw = false,
+	       const optional<string>& _prepend_format = none);
   virtual ~format_posts() {
     TRACE_DTOR(format_posts);
   }
@@ -82,12 +84,14 @@ protected:
   format_t    account_line_format;
   format_t    total_line_format;
   format_t    separator_format;
+  format_t    prepend_format;
   predicate_t disp_pred;
 
   std::list<account_t *> posted_accounts;
 
 public:
-  format_accounts(report_t& _report, const string& _format);
+  format_accounts(report_t& _report, const string& _format,
+		  const optional<string>& _prepend_format = none);
   virtual ~format_accounts() {
     TRACE_DTOR(format_accounts);
   }