parser: Allow an empty goal statement with no targets, deps or code.

This allows you to write "do nothing" goals like:

  goal all ;

diff --git a/src/parser.mly b/src/parser.mly
index eedbddb..9d6988b 100644 (file)
--- a/src/parser.mly
+++ b/src/parser.mly
@@ -118,6 +118,10 @@ stmt:
       let name, params = $1 in
       name, Ast.EGoalDefn ($loc, (params, [], [], Some $2))
     }
+    | GOAL ID
+    {
+      $2, Ast.EGoalDefn ($loc, ([], [], [], None))
+    }
     | option(PURE) FUNCTION ID params_decl return_decl EQUALS CODE
     {
       $3, Ast.EFuncDefn ($loc, ($4, $5, $1 <> None, $7))