parser.py 文件源码

def build(self, **kwargs):
        """
        Builds the PyCoolParser instance with yaac.yaac() by binding the lexer object and its tokens list in the
        current instance scope.
        :param kwargs: yaac.yaac() config parameters, complete list:
            * debug: Debug mode flag.
            * optimize: Optimize mode flag.
            * debuglog: Debug log file path; by default parser prints to stderr.
            * errorlog: Error log file path; by default parser print to stderr.
            * outputdir: Output directory of parsing output; by default the .out file goes in the same directory.
        :return: None
        """
        # Parse the parameters
        if kwargs is None or len(kwargs) == 0:
            debug, write_tables, optimize, outputdir, yacctab, debuglog, errorlog = \
                self._debug, self._write_tables, self._optimize, self._outputdir, self._yacctab, self._debuglog, \
                self._errorlog
        else:
            debug = kwargs.get("debug", self._debug)
            write_tables = kwargs.get("write_tables", self._write_tables)
            optimize = kwargs.get("optimize", self._optimize)
            outputdir = kwargs.get("outputdir", self._outputdir)
            yacctab = kwargs.get("yacctab", self._yacctab)
            debuglog = kwargs.get("debuglog", self._debuglog)
            errorlog = kwargs.get("errorlog", self._errorlog)

        # Build PyCoolLexer
        self.lexer = make_lexer(debug=debug, optimize=optimize, outputdir=outputdir, debuglog=debuglog,
                                errorlog=errorlog)

        # Expose tokens collections to this instance scope
        self.tokens = self.lexer.tokens

        # Build yacc parser
        self.parser = yacc.yacc(module=self, write_tables=write_tables, debug=debug, optimize=optimize,
                                outputdir=outputdir, tabmodule=yacctab, debuglog=debuglog, errorlog=errorlog)