Python UNARY_BOOLEAN_OPERATORS Examples

Example #1

File: parser.py Project: uber-archive/clusto-query

def parse_expression(q):
    if q[0] == "(":
        lhs, q = parse_boolean(q[1:])
        q = _expect(")", q)
        return lhs, q
    elif q[0] == "attr":
        lhs, q = parse_attribute(_expect("attr", q))
    elif "." in q[0]:
        raise StringParseError("Found a . in %s; missing attr?" % q[0])
    else:
        for op, kls in sorted(UNARY_BOOLEAN_OPERATORS.iteritems(),
                              key=len,
                              reverse=True):
            if op == q[0]:
                exp, rest = parse_expression(_expect(op, q))
                return kls(exp), rest
        else:
            lhs = q[0]
            q = q[1:]
    for op, kls in sorted(SUFFIX_OPERATORS.iteritems(), key=len, reverse=True):
        if q[0] == op:
            return kls(lhs), q[1:]
    for op, kls in sorted(INFIX_OPERATORS.iteritems(), key=len, reverse=True):
        if q[0] == op:
            return kls(lhs, q[1]), q[2:]
    else:
        raise UnexpectedTokenError(q)

Example #2

File: parser.py Project: shichao-an/clusto-query

def parse_expression(q):
    if q[0] == "(":
        lhs, q = parse_boolean(q[1:])
        q = _expect(")", q)
        return lhs, q
    elif q[0] == "attr":
        lhs, q = parse_attribute(_expect("attr", q))
    elif "." in q[0]:
        raise StringParseError("Found a . in %s; missing attr?" % q[0])
    else:
        for op, kls in sorted(UNARY_BOOLEAN_OPERATORS.iteritems(), key=len, reverse=True):
            if op == q[0]:
                exp, rest = parse_expression(_expect(op, q))
                return kls(exp), rest
        else:
            lhs = q[0]
            q = q[1:]
    for op, kls in sorted(SUFFIX_OPERATORS.iteritems(), key=len, reverse=True):
        if q[0] == op:
            return kls(lhs), q[1:]
    for op, kls in sorted(INFIX_OPERATORS.iteritems(), key=len, reverse=True):
        if q[0] == op:
            return kls(lhs, q[1]), q[2:]
    else:
        raise UnexpectedTokenError(q)

Example #3

File: lexer.py Project: uber-archive/clusto-query

def lex(q):
    keywords = ["attr"]
    keywords.extend(SEARCH_KEYWORDS)
    keywords.extend(BOOLEAN_OPERATORS.keys())
    keywords.extend(UNARY_BOOLEAN_OPERATORS.keys())
    keywords.extend(INFIX_OPERATORS.keys())
    keywords.extend(("(", ")"))
    keywords.sort(key=len, reverse=True)
    results = []
    while q:
        q = q.lstrip()
        for keyword in keywords:
            if q.startswith(keyword):
                if _unquoted_string_re.match(keyword):
                    if not _separator_re.match(consume(keyword, q)):
                        continue
                results.append(keyword)
                q = consume(keyword, q)
                break
        else:
            result, q = lex_string(q)
            results.append(result)
    return results

Example #4

File: lexer.py Project: shichao-an/clusto-query

def lex(q):
    keywords = ["attr"]
    keywords.extend(SEARCH_KEYWORDS)
    keywords.extend(BOOLEAN_OPERATORS.keys())
    keywords.extend(UNARY_BOOLEAN_OPERATORS.keys())
    keywords.extend(INFIX_OPERATORS.keys())
    keywords.extend(("(", ")"))
    keywords.sort(key=len, reverse=True)
    results = []
    while q:
        q = q.lstrip()
        for keyword in keywords:
            if q.startswith(keyword):
                if _unquoted_string_re.match(keyword):
                    if not _separator_re.match(consume(keyword, q)):
                        continue
                results.append(keyword)
                q = consume(keyword, q)
                break
        else:
            result, q = lex_string(q)
            results.append(result)
    return results