ReservedWordReader.py

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# This Source Code Form is subject to the terms of the Mozilla Public

# License, v. 2.0. If a copy of the MPL was not distributed with this

# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import re

def read_reserved_word_list(filename, *args):

    enable_decorators = False

    enable_explicit_resource_management = False

    for arg in args:

        if arg == "--enable-decorators":

            enable_decorators = True

        elif arg == "--enable-explicit-resource-management":

            enable_explicit_resource_management = True

        else:

            raise ValueError("Unknown argument: " + arg)

    macro_pat = re.compile(r"MACRO\(([^,]+), *[^,]+, *[^\)]+\)\s*\\?")

    reserved_word_list = []

    index = 0

    with open(filename) as f:

        for line in f:

            m = macro_pat.search(line)

            if m:

                reserved_word = m.group(1)

                if reserved_word == "accessor" and not enable_decorators:

                    continue

                if reserved_word == "using" and not enable_explicit_resource_management:

                    continue

                reserved_word_list.append((index, reserved_word))

                index += 1

    assert len(reserved_word_list) != 0

    return reserved_word_list