rust/src/test/run-pass/consts/const-needs_drop.rs

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2018-09-26 09:55:57 -05:00
use std::mem;
struct Trivial(u8, f32);
struct NonTrivial(u8, String);
const CONST_U8: bool = mem::needs_drop::<u8>();
const CONST_STRING: bool = mem::needs_drop::<String>();
const CONST_TRIVIAL: bool = mem::needs_drop::<Trivial>();
const CONST_NON_TRIVIAL: bool = mem::needs_drop::<NonTrivial>();
static STATIC_U8: bool = mem::needs_drop::<u8>();
static STATIC_STRING: bool = mem::needs_drop::<String>();
static STATIC_TRIVIAL: bool = mem::needs_drop::<Trivial>();
static STATIC_NON_TRIVIAL: bool = mem::needs_drop::<NonTrivial>();
fn main() {
assert!(!CONST_U8);
assert!(CONST_STRING);
assert!(!CONST_TRIVIAL);
assert!(CONST_NON_TRIVIAL);
assert!(!STATIC_U8);
assert!(STATIC_STRING);
assert!(!STATIC_TRIVIAL);
assert!(STATIC_NON_TRIVIAL);
}