rust/tests/ui/no_effect.rs

139 lines
2.5 KiB
Rust

// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(box_syntax)]
#![warn(clippy::no_effect)]
#![allow(dead_code)]
#![allow(path_statements)]
#![allow(clippy::deref_addrof)]
#![allow(clippy::redundant_field_names)]
#![feature(untagged_unions)]
struct Unit;
struct Tuple(i32);
struct Struct {
field: i32,
}
enum Enum {
Tuple(i32),
Struct { field: i32 },
}
struct DropUnit;
impl Drop for DropUnit {
fn drop(&mut self) {}
}
struct DropStruct {
field: i32,
}
impl Drop for DropStruct {
fn drop(&mut self) {}
}
struct DropTuple(i32);
impl Drop for DropTuple {
fn drop(&mut self) {}
}
enum DropEnum {
Tuple(i32),
Struct { field: i32 },
}
impl Drop for DropEnum {
fn drop(&mut self) {}
}
struct FooString {
s: String,
}
union Union {
a: u8,
b: f64,
}
fn get_number() -> i32 {
0
}
fn get_struct() -> Struct {
Struct { field: 0 }
}
fn get_drop_struct() -> DropStruct {
DropStruct { field: 0 }
}
unsafe fn unsafe_fn() -> i32 {
0
}
struct A(i32);
struct B {
field: i32,
}
struct C {
b: B,
}
struct D {
arr: [i32; 1],
}
const A_CONST: A = A(1);
const B: B = B { field: 1 };
const C: C = C { b: B { field: 1 } };
const D: D = D { arr: [1] };
fn main() {
let s = get_struct();
let s2 = get_struct();
0;
s2;
Unit;
Tuple(0);
Struct { field: 0 };
Struct { ..s };
Union { a: 0 };
Enum::Tuple(0);
Enum::Struct { field: 0 };
5 + 6;
*&42;
&6;
(5, 6, 7);
box 42;
..;
5..;
..5;
5..6;
5..=6;
[42, 55];
[42, 55][1];
(42, 55).1;
[42; 55];
[42; 55][13];
let mut x = 0;
|| x += 5;
let s: String = "foo".into();
FooString { s: s };
A_CONST.0 = 2;
B.field = 2;
C.b.field = 2;
D.arr[0] = 2;
// Do not warn
get_number();
unsafe { unsafe_fn() };
DropUnit;
DropStruct { field: 0 };
DropTuple(0);
DropEnum::Tuple(0);
DropEnum::Struct { field: 0 };
let mut a_mut = A(1);
a_mut.0 = 2;
let mut b_mut = B { field: 1 };
b_mut.field = 2;
let mut c_mut = C { b: B { field: 1 } };
c_mut.b.field = 2;
let mut d_mut = D { arr: [1] };
d_mut.arr[0] = 2;
}