feat: non-capturing meta variable

Author: j4k0xb

packages/matchers/src/template.ts

@@ -75,7 +75,11 @@ function parseTemplate(
       }
 
       if (isMetaVariable(node)) {
-        schemas.push(capture(node.name.slice(1)));
+        if (node.name.startsWith('$_')) {
+          schemas.push(any);
+        } else {
+          schemas.push(capture(node.name.slice(1)));
+        }
         node.name = `$${schemaIndex++}`;
       }
 

packages/matchers/test/template.test.ts

@@ -40,3 +40,11 @@ test('template with meta variable syntax', () => {
     greeting: { value: 'hello' },
   });
 });
+
+test('template with non-capturing meta variable syntax', () => {
+  const schema = m.expression`$_method($_arg)`;
+  const matcher = m.compile(schema);
+  console.log(matcher.toString());
+
+  expect(matcher(parseExpression('print(1)'))).not.toHaveProperty('_method');
+});