parser.py 文件源码

def json_text():
    """Returns the parser for Json formatted data"""
    # Taken from https://github.com/vlasovskikh/funcparserlib/blob/master/funcparserlib/tests/json.py
    # and modified slightly
    unwrap = lambda x: x.value

    null = (n('null') | n('Null')) >> const(None) >> unwrap

    value = forward_decl()
    member = (string >> unwrap) + op_(u':') + value >> tuple
    object = (
        op_(u'{') +
        maybe(member + many(op_(u',') + member) + maybe(op_(','))) +
        op_(u'}')
        >> make_object)
    array = (
        op_(u'[') +
        maybe(value + many(op_(u',') + value) + maybe(op_(','))) +
        op_(u']')
        >> make_array)

    value.define(
        null
        | (true >> unwrap)
        | (false >> unwrap)
        | object
        | array
        | (number >> unwrap)
        | (string >> unwrap))
    json_text = object | array

    return json_text