2 #![feature(let_chains)]
5 clippy
::assign_op_pattern
,
6 clippy
::blocks_in_if_conditions
,
7 clippy
::let_and_return
,
8 clippy
::let_unit_value
,
9 clippy
::nonminimal_bool
12 use std
::collections
::{BTreeMap, BTreeSet, HashMap, HashSet}
;
15 struct SignificantDrop
;
16 impl std
::ops
::Drop
for SignificantDrop
{
65 e
= format
!("{} {}", a
, b
);
83 // Drop order only matters if both are significant
85 let y
= SignificantDrop
;
93 // types that should be considered insignificant
96 let y
= String
::new();
98 let y
= HashMap
::<usize, usize>::new();
99 let y
= BTreeMap
::<usize, usize>::new();
100 let y
= HashSet
::<usize>::new();
101 let y
= BTreeSet
::<usize>::new();
106 async
fn in_async() -> &'
static str {
107 async
fn f() -> &'
static str {
123 const fn in_const() -> &'
static str {
124 const fn f() -> &'
static str {
168 // using tuples would be possible, but not always preferable
179 // could match with a smarter heuristic to avoid multiple assignments
197 macro_rules
! assign
{
212 macro_rules
! in_macro
{
227 // ignore if-lets - https://github.com/rust-lang/rust-clippy/issues/8613
229 if let Some(n
) = Some("v") {
236 if true && let Some(n
) = Some("let chains too") {
242 // ignore mut bindings
243 // https://github.com/shepmaster/twox-hash/blob/b169c16d86eb8ea4a296b0acb9d00ca7e3c3005f/src/sixty_four.rs#L88-L93
244 // https://github.com/dtolnay/thiserror/blob/21c26903e29cb92ba1a7ff11e82ae2001646b60d/tests/test_generics.rs#L91-L100
250 // should not move the declaration if `x` has a significant drop, and there
251 // is another binding with a significant drop between it and the first usage
253 let y
= SignificantDrop
;
258 fn issue8911() -> u32 {
261 _
if { x = 1; false }
=> return 1,