Example #1
0
def parse_feature_node(s,next_index=0):
    next_index = jump_over_space(s,next_index)
    start_index = next_index
    while True:
        # Alnum and '-' are both legal characters inside a node
        ch = s[next_index]
        if ch.isalnum() or ch == '-' or ch == '_':
            next_index += 1
        else:
            break
    feature_node = s[start_index:next_index]
    if feature_node == '':
        feature_node = None
    return (feature_node,next_index)
Example #2
0
def parse_feature_node(s, next_index=0):
    next_index = jump_over_space(s, next_index)
    start_index = next_index
    while True:
        # Alnum and '-' are both legal characters inside a node
        ch = s[next_index]
        if ch.isalnum() or ch == '-' or ch == '_':
            next_index += 1
        else:
            break
    feature_node = s[start_index:next_index]
    if feature_node == '':
        feature_node = None
    return (feature_node, next_index)
Example #3
0
def check_symbol(s,next_index,symbol):
    """
    Check whether we have got a defined symbol in the grammar. Return False if
    not, or return the next_index after this symbol.

    :param s: The string need to be checked
    :type s: str
    :param next_index: Index on the string
    :type next_index: integer
    :param symbol: The symbol to be checked against
    :type symbol: str
    """
    try:
        next_index = jump_over_space(s,next_index)
        if s[next_index:next_index + len(symbol)] == symbol:
            return next_index + len(symbol) # We must ignore the symbol
    except IndexError:
        return False
    else:
        return False
Example #4
0
def check_symbol(s, next_index, symbol):
    """
    Check whether we have got a defined symbol in the grammar. Return False if
    not, or return the next_index after this symbol.

    :param s: The string need to be checked
    :type s: str
    :param next_index: Index on the string
    :type next_index: integer
    :param symbol: The symbol to be checked against
    :type symbol: str
    """
    try:
        next_index = jump_over_space(s, next_index)
        if s[next_index:next_index + len(symbol)] == symbol:
            return next_index + len(symbol)  # We must ignore the symbol
    except IndexError:
        return False
    else:
        return False
Example #5
0
def parse_feature_value(s,next_index=0):
    """
    Parse the value of a feature entry. The value can be a plain text string
    without any space or new line, or it can be several sub values separated
    by '/'. In both case the function will return a list containing each sub
    strings.

    :param s: The string to be parsed
    :type s: str
    :return: A tuple containing the value as well as next_index
    :rtype: tuple(list(str),integer)
    """
    next_index = jump_over_space(s,next_index)
    start_index = next_index
    while True:
        if not s[next_index].isspace():
            next_index += 1
        else:
            break
    feature_value = s[start_index:next_index]
    if feature_value == '':
        feature_value = None
    feature_value = feature_value.split('/')
    return (feature_value,next_index)
Example #6
0
def parse_feature_value(s, next_index=0):
    """
    Parse the value of a feature entry. The value can be a plain text string
    without any space or new line, or it can be several sub values separated
    by '/'. In both case the function will return a list containing each sub
    strings.

    :param s: The string to be parsed
    :type s: str
    :return: A tuple containing the value as well as next_index
    :rtype: tuple(list(str),integer)
    """
    next_index = jump_over_space(s, next_index)
    start_index = next_index
    while True:
        if not s[next_index].isspace():
            next_index += 1
        else:
            break
    feature_value = s[start_index:next_index]
    if feature_value == '':
        feature_value = None
    feature_value = feature_value.split('/')
    return (feature_value, next_index)