92 lines
2.1 KiB
Rust
92 lines
2.1 KiB
Rust
|
#![allow(unused)]
|
||
|
|
#![warn(clippy::manual_while_let_some)]
|
||
|
|
|
||
|
|
struct VecInStruct {
|
||
|
|
numbers: Vec<i32>,
|
||
|
|
unrelated: String,
|
||
|
|
}
|
||
|
|
|
||
|
|
struct Foo {
|
||
|
|
a: i32,
|
||
|
|
b: i32,
|
||
|
|
}
|
||
|
|
|
||
|
|
fn accept_i32(_: i32) {}
|
||
|
|
fn accept_optional_i32(_: Option<i32>) {}
|
||
|
|
fn accept_i32_tuple(_: (i32, i32)) {}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let mut numbers = vec![1, 2, 3, 4, 5];
|
||
|
|
while let Some(number) = numbers.pop() {
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
let mut val = VecInStruct {
|
||
|
|
numbers: vec![1, 2, 3, 4, 5],
|
||
|
|
unrelated: String::new(),
|
||
|
|
};
|
||
|
|
while let Some(number) = val.numbers.pop() {
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
while let Some(element) = numbers.pop() {
|
||
|
|
accept_i32(element);
|
||
|
|
}
|
||
|
|
|
||
|
|
while let Some(element) = numbers.pop() {
|
||
|
|
accept_i32(element);
|
||
|
|
}
|
||
|
|
|
||
|
|
// This should not warn. It "conditionally" pops elements.
|
||
|
|
while !numbers.is_empty() {
|
||
|
|
if true {
|
||
|
|
accept_i32(numbers.pop().unwrap());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// This should also not warn. It conditionally pops elements.
|
||
|
|
while !numbers.is_empty() {
|
||
|
|
if false {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
accept_i32(numbers.pop().unwrap());
|
||
|
|
}
|
||
|
|
|
||
|
|
// This should not warn. It pops elements, but does not unwrap it.
|
||
|
|
// Might handle the Option in some other arbitrary way.
|
||
|
|
while !numbers.is_empty() {
|
||
|
|
accept_optional_i32(numbers.pop());
|
||
|
|
}
|
||
|
|
|
||
|
|
let unrelated_vec: Vec<String> = Vec::new();
|
||
|
|
// This should not warn. It pops elements from a different vector.
|
||
|
|
while !unrelated_vec.is_empty() {
|
||
|
|
accept_i32(numbers.pop().unwrap());
|
||
|
|
}
|
||
|
|
|
||
|
|
macro_rules! generate_loop {
|
||
|
|
() => {
|
||
|
|
while !numbers.is_empty() {
|
||
|
|
accept_i32(numbers.pop().unwrap());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
// Do not warn if the loop comes from a macro.
|
||
|
|
generate_loop!();
|
||
|
|
|
||
|
|
// Try other kinds of patterns
|
||
|
|
let mut numbers = vec![(0, 0), (1, 1), (2, 2)];
|
||
|
|
while let Some((a, b)) = numbers.pop() {
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
while let Some(element) = numbers.pop() {
|
||
|
|
accept_i32_tuple(element);
|
||
|
|
}
|
||
|
|
|
||
|
|
let mut results = vec![Foo { a: 1, b: 2 }, Foo { a: 3, b: 4 }];
|
||
|
|
while let Some(Foo { a, b }) = results.pop() {
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|