[parser] initialization based on Loc.t rather than Loc.source

In this way one can also set the current offsets in a file,
useful if you are parsing a Coq fragment within a file instead
of a full file starting from the first line.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/loc.ml b/lib/loc.ml
index 66b7a7da70..6bcdcc0341 100644
--- a/lib/loc.ml
+++ b/lib/loc.ml
@@ -29,6 +29,8 @@ let create fname line_nb bol_pos bp ep = {
   line_nb_last = line_nb; bol_pos_last = bol_pos; bp = bp; ep = ep;
 }
 
+let initial source = create source 1 0 0 0
+
 let make_loc (bp, ep) = {
   fname = ToplevelInput; line_nb = -1; bol_pos = 0; line_nb_last = -1; bol_pos_last = 0;
   bp = bp; ep = ep;