parser.py 文件源码

def parse_def_stmt(self):
        stmt = ast.FunctionDefinition(self.cur_tok, [], None)

        self.next()

        stmt.pattern = self.parse_pattern_call(token.LBRACE)
        if stmt.pattern == None:
            return None

        stmt.body = self.parse_block_statement()

        if len(stmt.pattern) == 0:
            self.err("expected at least one item in a pattern")
            return None

        return stmt