_fn.py 文件源码

def translate(self, ctx):
        translation = []
        scrutinee = ast.Name(id="__typy_with_scrutinee__")
        translation.extend(
            self.body_block.translate_assign(
                ctx, scrutinee))
        pat = self.pat
        ctx_update = pat.ctx_update
        condition, binding_translations = ctx.translate_pat(pat, scrutinee)
        if astx.cond_vacuously_true(condition):
            for (id, trans) in binding_translations.iteritems():
                translation.append(ast.Assign(
                    targets=[ast.Name(id=ctx_update[id][0])],
                    value=trans))
        else:
            translation.append(ast.If(
                test=condition,
                body=list(_yield_binding_translation_assignments(
                    binding_translations, ctx_update)),
                orelse=astx.expr_Raise_Exception_string("Match failure.")))
        return translation