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41 lines
1.2 KiB
Python
41 lines
1.2 KiB
Python
from __future__ import unicode_literals
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from ..conversions import *
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from ..func_utils import *
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from ..base import SpaceTuple
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REG_EXP_FLAGS = ('g', 'i', 'm')
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def RegExp(this, args):
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pattern = get_arg(args, 0)
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flags = get_arg(args, 1)
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if GetClass(pattern) == 'RegExp':
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if not is_undefined(flags):
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raise MakeError(
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'TypeError',
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'Cannot supply flags when constructing one RegExp from another'
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)
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# return unchanged
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return pattern
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#pattern is not a regexp
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if is_undefined(pattern):
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pattern = u''
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else:
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pattern = to_string(pattern)
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flags = to_string(flags) if not is_undefined(flags) else u''
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for flag in flags:
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if flag not in REG_EXP_FLAGS:
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raise MakeError(
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'SyntaxError',
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'Invalid flags supplied to RegExp constructor "%s"' % flag)
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if len(set(flags)) != len(flags):
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raise MakeError(
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'SyntaxError',
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'Invalid flags supplied to RegExp constructor "%s"' % flags)
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return args.space.NewRegExp(pattern, flags)
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def RegExpCreate(args, space):
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_args = SpaceTuple(args)
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_args.space = space
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return RegExp(undefined, _args)
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