lang: ast: implement parsing of match statements

lang/ast/discard.c

@@ -0,0 +1,9 @@
+#include "ctx.h"
+#include "node.h"
+
+#include <stdio.h>
+
+struct ast_node_type discard_node_ops = {
+	.n_state_size = sizeof(struct parser_state),
+	.n_node_size = sizeof(struct ivy_ast_discard_node),
+};