mirror of https://github.com/rust-lang/rust
32 lines
735 B
Rust
32 lines
735 B
Rust
#![feature(coroutines, stmt_expr_attributes)]
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#![allow(dropping_copy_types)]
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//@ run-pass
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use std::mem::size_of_val;
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fn main() {
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// Coroutine taking a `Copy`able resume arg.
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let gen_copy = #[coroutine]
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|mut x: usize| {
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loop {
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drop(x);
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x = yield;
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}
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};
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// Coroutine taking a non-`Copy` resume arg.
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let gen_move = #[coroutine]
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|mut x: Box<usize>| {
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loop {
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drop(x);
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x = yield;
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}
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};
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// Neither of these coroutines have the resume arg live across the `yield`, so they should be
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// 1 Byte in size (only storing the discriminant)
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assert_eq!(size_of_val(&gen_copy), 1);
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assert_eq!(size_of_val(&gen_move), 1);
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}
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