better error messages for the SQLite parser

[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Parser / SQLite.pm

diff --git a/lib/SQL/Translator/Parser/SQLite.pm b/lib/SQL/Translator/Parser/SQLite.pm
index fc39db7..169b516 100644 (file)
--- a/lib/SQL/Translator/Parser/SQLite.pm
+++ b/lib/SQL/Translator/Parser/SQLite.pm
@@ -152,6 +152,16 @@ $GRAMMAR = q!
 
 {
     my ( %tables, $table_order, @table_comments, @views, @triggers );
+
+    sub _err {
+      my $max_lines = 5;
+      my @up_to_N_lines = split (/\n/, $_[1], $max_lines + 1);
+      die sprintf ("Unable to parse line %d:\n%s\n",
+        $_[0],
+        join "\n", (map { "'$_'" } @up_to_N_lines[0..$max_lines - 1 ]), @up_to_N_lines > $max_lines ? '...' : ()
+      );
+    }
+
 }
 
 #
@@ -175,7 +185,7 @@ statement : begin_transaction
     | drop
     | comment
     | create
-    | <error>
+    | /^\Z/ | { _err ($thisline, $text) }
 
 begin_transaction : /begin/i TRANSACTION(?) SEMICOLON