parser: reuse child location when possible

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/parser/parser_work.nit b/src/parser/parser_work.nit
index 41d6741..29588b4 100644 (file)
--- a/src/parser/parser_work.nit
+++ b/src/parser/parser_work.nit
@@ -220,7 +220,11 @@ private class ComputeProdLocationVisitor
                                var endl = _last_location
                                assert endl != null
 
-                               n.location = new Location(startl.file, startl.line_start, endl.line_end, startl.column_start, endl.column_end)
+                               if startl == endl then
+                                       n.location = startl
+                               else
+                                       n.location = new Location(startl.file, startl.line_start, endl.line_end, startl.column_start, endl.column_end)
+                               end
 
                                if not _need_after_epsilons.is_empty then
                                        var loc = new Location(endl.file, endl.line_end, endl.line_end, endl.column_end, endl.column_end)