lang: ast: implement parsing of match statements

lang/ast/expr/expr.c

@@ -32,12 +32,20 @@ struct ast_node_type expr_node_ops = {
 		SYM_PARSER(LEFT_PAREN, arith_parse_left_paren),
 		SYM_PARSER(RIGHT_PAREN, arith_parse_right_paren),
 		SYM_PARSER(SEMICOLON, arith_parse_semicolon),
+		SYM_PARSER(UNDERSCORE, arith_parse_operand),
+		SYM_PARSER(COMMA, arith_parse_comma),
 		SYM_PARSER(DOT, arith_parse_dot),
+		SYM_PARSER(EQUAL_RIGHT_ANGLE, arith_parse_equal_right_angle),
 	},
 	.n_keyword_parsers = {
+		/* statement keywords */
+		KW_PARSER(MATCH, stmt_parse_match),
 		KW_PARSER(IF, stmt_parse_if),
 		KW_PARSER(THEN, stmt_parse_then),
 		KW_PARSER(ELSE, stmt_parse_else),
 		KW_PARSER(END, stmt_parse_end),
+
+		/* operator keywords */
+		KW_PARSER(IN, arith_parse_in),
 	}
 };