| # Copyright 2017 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| from .extended_attribute import ExtendedAttributeList |
| from .idl_types import RecordType |
| from .idl_types import SequenceType |
| from .utilities import assert_no_extra_args |
| |
| |
| # https://heycam.github.io/webidl/#idl-constants |
| class Constant(object): |
| _INVALID_IDENTIFIERS = frozenset(['length', 'name', 'prototype']) |
| _INVALID_TYPES = frozenset([SequenceType, RecordType]) |
| |
| def __init__(self, **kwargs): |
| self._identifier = kwargs.pop('identifier') |
| self._type = kwargs.pop('type') |
| self._value = kwargs.pop('value') |
| self._extended_attribute_list = kwargs.pop('extended_attribute_list', ExtendedAttributeList()) |
| assert_no_extra_args(kwargs) |
| |
| if self.identifier in Constant._INVALID_IDENTIFIERS: |
| raise ValueError('Invalid identifier for a constant: %s' % self.identifier) |
| if type(self.type) in Constant._INVALID_TYPES: |
| raise ValueError('sequence<T> must not be used as the type of a constant.') |
| |
| @property |
| def identifier(self): |
| return self._identifier |
| |
| @property |
| def type(self): |
| return self._type |
| |
| @property |
| def value(self): |
| return self._value |
| |
| @property |
| def extended_attribute_list(self): |
| return self._extended_attribute_list |
