starlark 0.13.0

An implementation of the Starlark language in Rust.
Documentation 
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/*
 * Copyright 2018 The Starlark in Rust Authors.
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use crate::assert::Assert;
use crate::tests::bc::golden::bc_golden_test;

/// Test for bug reported in D36808160.
#[test]
fn test_definitely_assigned_bug() {
    let mut a = Assert::new();
    a.module(
        "a.star",
        r"
def f(a):
  # The bug was: compilation of `and` expression reassigned `10` to `a`.
  noop(a and 10)
  return a
",
    );
    a.eq("33", "load('a.star', 'f')\nf(33)");
}

#[test]
fn test_definitely_assigned_slot_range_in_list() {
    bc_golden_test(
        "definitely_assigned_slot_range_in_list",
        "def test(x, y): return [x, y]",
    );
}

#[test]
fn test_definitely_assigned_slot_range_in_call() {
    bc_golden_test(
        "definitely_assigned_slot_range_in_call",
        "def test(x, y): noop(x, y)",
    );
}

#[test]
fn test_mov_is_used() {
    // `Mov`, not `LoadLocal` should be used to load `y` and `x`.
    bc_golden_test(
        "definitely_assigned_mov_is_used",
        "def test(x, y): noop(y, x)",
    );
}

#[test]
fn test_no_op_movs() {
    bc_golden_test("definitely_assigned_no_op_movs", "def test(x): x = x");
}