parser: include leading '.' in concat subexpression location

Make error messages point to the entire subexpression.

Before:

filter output ip daddr . tcp dport . tcp dport { 192.168.0.1 . ssh . ssh . ssh}
                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^

After:

filter output ip daddr . tcp dport . tcp dport { 192.168.0.1 . ssh . ssh . ssh}
                                                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^

Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/parser.y b/src/parser.y
index 166cbcc5..ff8ca0d0 100644
--- a/src/parser.y
+++ b/src/parser.y
@@ -1078,6 +1078,12 @@ concat_expr		:	basic_expr
 					$$ = concat_expr_alloc(&@$);
 					compound_expr_add($$, $1);
 				} else {
+					struct location rhs[] = {
+						[1]	= @2,
+						[2]	= @3,
+					};
+					location_update(&$3->location, rhs, 2);
+
 					$$ = $1;
 					$$->location = @$;
 				}