comparison mercurial/parser.py @ 13176:895f54a79c6e

templater: use the parser.py parser to extend the templater syntax

13175:09cde75e0613

class parser(object):
    def __init__(self, tokenizer, elements, methods=None):
        self._tokenizer = tokenizer
        self._elements = elements
        self._methods = methods
    def _advance(self):
        'advance the tokenizer'
        t = self.current
        try:
            self.current = self._iter.next()

                        self._match(infix[2], pos)
        return expr
    def parse(self, message):
        'generate a parse tree from a message'
        self._iter = self._tokenizer(message)
        self.current = self._iter.next()
        return self._parse()
    def eval(self, tree):
        'recursively evaluate a parse tree using node methods'
        if not isinstance(tree, tuple):
            return tree

13176:895f54a79c6e

class parser(object):
    def __init__(self, tokenizer, elements, methods=None):
        self._tokenizer = tokenizer
        self._elements = elements
        self._methods = methods
        self.current = None
    def _advance(self):
        'advance the tokenizer'
        t = self.current
        try:
            self.current = self._iter.next()

                        self._match(infix[2], pos)
        return expr
    def parse(self, message):
        'generate a parse tree from a message'
        self._iter = self._tokenizer(message)
        self._advance()
        return self._parse()
    def eval(self, tree):
        'recursively evaluate a parse tree using node methods'
        if not isinstance(tree, tuple):
            return tree