Python pyparsing.NoMatch() Examples

The following are 2 code examples of pyparsing.NoMatch(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module pyparsing , or try the search function .
Example #1
Source File: expansions.py    From pyjsgf with MIT License 5 votes vote down vote up 
def _make_matcher_element(self):
        return self._set_matcher_element_attributes(pyparsing.NoMatch())
Example #2
Source File: expansions.py    From pyjsgf with MIT License 4 votes vote down vote up 
def _make_matcher_element(self):
        # Handle the case where use_current_match is True.
        if self.use_current_match is True:
            current_match = self.current_match
            if current_match is None:
                result = pyparsing.NoMatch()
            elif current_match == "":
                result = pyparsing.Empty()
            else:
                result = pyparsing.Literal(self.current_match)

            # Set the parse action and return the element.
            return result.setParseAction(self._parse_action)

        # Otherwise build a list of next possible literals. Make the required stack
        # of child-parent pairs.
        stack = []
        p1, p2 = self, self.parent
        while p1 and p2:
            stack.append((p1, p2))

            # Move both pivots further up the tree.
            p1 = p1.parent
            p2 = p2.parent

        # Build a list of next literals using the stack.
        next_literals, _ = _collect_next_literals(stack, 0, True, False)

        # De-duplicate the list.
        next_literals = set(next_literals)

        word = pyparsing.Regex(_word_regex_str, re.UNICODE)
        if next_literals:
            # Check if there is a next dictation literal. If there is, only match
            # one word for this expansion.
            if _word_regex_str in next_literals:
                result = word

            # Otherwise build an element to match one or more words stopping on
            # any of the next literals so that they aren't matched as dictation.
            else:
                next_literals = list(map(pyparsing.Literal, next_literals))
                result = pyparsing.OneOrMore(
                    word, stopOn=pyparsing.Or(next_literals)
                )
        else:
            # Handle the case of no literals ahead by allowing one or more Unicode
            # words without restrictions.
            result = pyparsing.OneOrMore(word)

        return self._set_matcher_element_attributes(result)