From 7e100d137caec139daacc2967836f957bb0818fe Mon Sep 17 00:00:00 2001
From: Yclept Nemo <pscjtwjdjtAhnbjm/dpn>
Date: Sat, 29 Jul 2023 11:15:39 -0400
Subject: [PATCH] expose the "apply" rule

Allow higher-order rules
---
 ometa/runtime.py           |  1 +
 ometa/test/test_runtime.py | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/ometa/runtime.py b/ometa/runtime.py
index d6bdc24..49e41ff 100644
--- a/ometa/runtime.py
+++ b/ometa/runtime.py
@@ -800,6 +800,7 @@ def digit(self):
     rule_end = end
     rule_ws = eatWhitespace
     rule_exactly = exactly
+    rule_apply = apply
 
     #Deprecated.
     rule_spaces = eatWhitespace
diff --git a/ometa/test/test_runtime.py b/ometa/test/test_runtime.py
index 957f3bc..474acb5 100644
--- a/ometa/test/test_runtime.py
+++ b/ometa/test/test_runtime.py
@@ -58,6 +58,17 @@ def test_exactlyFail(self):
         self.assertEquals(exc.args[0], 0)
 
 
+    def test_apply(self):
+        """
+        L{OMetaBase.rule_apply} applies the given rule with arguments.
+        """
+        data = "foo"
+        o = OMetaBase(data)
+        v, e = o.rule_apply("exactly", "f")
+        self.assertEqual(v, "f")
+        self.assertEqual(e.args[0], 0)
+        self.assertRaises(NameError, o.rule_apply, "foo")
+
 
     def test_token(self):
         """