rust/tests/ui/large_stack_frames.rs

45 lines
902 B
Rust

#![allow(unused, incomplete_features)]
#![warn(clippy::large_stack_frames)]
#![feature(unsized_locals)]
use std::hint::black_box;
fn generic<T: Default>() {
let x = T::default();
black_box(&x);
}
fn unsized_local() {
let x: dyn std::fmt::Display = *(Box::new(1) as Box<dyn std::fmt::Display>);
black_box(&x);
}
struct ArrayDefault<const N: usize>([u8; N]);
impl<const N: usize> Default for ArrayDefault<N> {
fn default() -> Self {
Self([0; N])
}
}
fn many_small_arrays() {
let x = [0u8; 500_000];
let x2 = [0u8; 500_000];
let x3 = [0u8; 500_000];
let x4 = [0u8; 500_000];
let x5 = [0u8; 500_000];
black_box((&x, &x2, &x3, &x4, &x5));
}
fn large_return_value() -> ArrayDefault<1_000_000> {
Default::default()
}
fn large_fn_arg(x: ArrayDefault<1_000_000>) {
black_box(&x);
}
fn main() {
generic::<ArrayDefault<1_000_000>>();
}