yacc.py 文件源码

def validate_modules(self):
        # Match def p_funcname(
        fre = re.compile(r'\s*def\s+(p_[a-zA-Z_0-9]*)\(')

        for module in self.modules:
            try:
                lines, linen = inspect.getsourcelines(module)
            except IOError:
                continue

            counthash = {}
            for linen, line in enumerate(lines):
                linen += 1
                m = fre.match(line)
                if m:
                    name = m.group(1)
                    prev = counthash.get(name)
                    if not prev:
                        counthash[name] = linen
                    else:
                        filename = inspect.getsourcefile(module)
                        self.log.warning('%s:%d: Function %s redefined. Previously defined on line %d',
                                         filename, linen, name, prev)

    # Get the start symbol