def parse_identifier(source, start, throw=True):
    """passes white space from start and returns first identifier,
       if identifier invalid and throw raises SyntaxError otherwise returns None"""
    start = pass_white(source, start)
    end = start
    if not end < len(source):
        if throw:
            raise SyntaxError('Missing identifier!')
        return None
    if source[end] not in IDENTIFIER_START:
        if throw:
            raise SyntaxError('Invalid identifier start: "%s"' % source[end])
        return None
    end += 1
    while end < len(source) and source[end] in IDENTIFIER_PART:
        end += 1
    if not is_valid_lval(source[start:end]):
        if throw:
            raise SyntaxError(
                'Invalid identifier name: "%s"' % source[start:end])
        return None
    return source[start:end], end
def parse_identifier(source, start, throw=True):
    """passes white space from start and returns first identifier,
       if identifier invalid and throw raises SyntaxError otherwise returns None"""
    start = pass_white(source, start)
    end = start
    if not end < len(source):
        if throw:
            raise SyntaxError('Missing identifier!')
        return None
    if source[end] not in IDENTIFIER_START:
        if throw:
            raise SyntaxError('Invalid identifier start: "%s"' % source[end])
        return None
    end += 1
    while end < len(source) and source[end] in IDENTIFIER_PART:
        end += 1
    if not is_valid_lval(source[start:end]):
        if throw:
            raise SyntaxError(
                'Invalid identifier name: "%s"' % source[start:end])
        return None
    return source[start:end], end
def parse_identifier ( source , start , throw = True ) : start = pass_white ( source , start ) end = start if not end < len ( source ) : if throw : raise SyntaxError ( 'Missing identifier!' ) return None if source [ end ] not in IDENTIFIER_START : if throw : raise SyntaxError ( 'Invalid identifier start: "%s"' % source [ end ] ) return None end += 1 while end < len ( source ) and source [ end ] in IDENTIFIER_PART : end += 1 if not is_valid_lval ( source [ start : end ] ) : if throw : raise SyntaxError ( 'Invalid identifier name: "%s"' % source [ start : end ] ) return None return source [ start : end ] , end
passes white space from start and returns first identifier,
       if identifier invalid and throw raises SyntaxError otherwise returns None
passes white space from start and returns first identifier if identifier invalid and throw raises SyntaxError otherwise returns None