_product.py 文件源码

def syn_Compare(self, ctx, e):
        left, ops, comparators = e.left, e.ops, e.comparators
        for op in ops:
            if isinstance(op, (ast.Eq, ast.NotEq)):
                if not len(self.idx) == 0:
                    raise _errors.TyError("Can only compare unit values for equality.", e)
            elif not isinstance(op, (ast.Is, ast.IsNot)):
                raise _errors.TyError("Invalid comparison operator.", op)

        for e_ in _util.tpl_cons(left, comparators):
            if hasattr(e_, "match"): 
                continue # already synthesized
            ctx.ana(e_, self)

        return _boolean.boolean