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//@ incremental
// Need to disable optimizations to ensure consistent output across all CI runners.
//@ compile-flags: -Copt-level=0
#![crate_type = "rlib"]
// This test case makes sure that references made through constants cause trait associated methods
// to be monomorphized when required.
mod mod1 {
struct NeedsDrop;
impl Drop for NeedsDrop {
fn drop(&mut self) {}
}
pub trait Trait1 {
fn do_something(&self) {}
fn do_something_else(&self) {}
}
impl Trait1 for NeedsDrop {}
pub trait Trait1Gen<T> {
fn do_something(&self, x: T) -> T;
fn do_something_else(&self, x: T) -> T;
}
impl<T> Trait1Gen<T> for NeedsDrop {
fn do_something(&self, x: T) -> T {
x
}
fn do_something_else(&self, x: T) -> T {
x
}
}
fn id<T>(x: T) -> T {
x
}
// These are referenced, so they produce mono-items (see main)
pub const TRAIT1_REF: &'static Trait1 = &NeedsDrop as &Trait1;
pub const TRAIT1_GEN_REF: &'static Trait1Gen<u8> = &NeedsDrop as &Trait1Gen<u8>;
pub const ID_CHAR: fn(char) -> char = id::<char>;
pub trait Trait2 {
fn do_something(&self) {}
fn do_something_else(&self) {}
}
impl Trait2 for NeedsDrop {}
pub trait Trait2Gen<T> {
fn do_something(&self, x: T) -> T;
fn do_something_else(&self, x: T) -> T;
}
impl<T> Trait2Gen<T> for NeedsDrop {
fn do_something(&self, x: T) -> T {
x
}
fn do_something_else(&self, x: T) -> T {
x
}
}
// These are not referenced, so they do not produce mono-items
pub const TRAIT2_REF: &'static Trait2 = &NeedsDrop as &Trait2;
pub const TRAIT2_GEN_REF: &'static Trait2Gen<u8> = &NeedsDrop as &Trait2Gen<u8>;
pub const ID_I64: fn(i64) -> i64 = id::<i64>;
}
//~ MONO_ITEM fn main @@ vtable_through_const[External]
pub fn main() {
//~ MONO_ITEM fn <mod1::NeedsDrop as std::ops::Drop>::drop @@ vtable_through_const-fallback.cgu[External]
//~ MONO_ITEM fn std::ptr::drop_in_place::<mod1::NeedsDrop> - shim(Some(mod1::NeedsDrop)) @@ vtable_through_const-fallback.cgu[External]
// Since Trait1::do_something() is instantiated via its default implementation,
// it is considered a generic and is instantiated here only because it is
// referenced in this module.
//~ MONO_ITEM fn <mod1::NeedsDrop as mod1::Trait1>::do_something_else @@ vtable_through_const-mod1.volatile[External]
// Although it is never used, Trait1::do_something_else() has to be
// instantiated locally here too, otherwise the <&NeedsDrop as &Trait1> vtable
// could not be fully constructed.
//~ MONO_ITEM fn <mod1::NeedsDrop as mod1::Trait1>::do_something @@ vtable_through_const-mod1.volatile[External]
mod1::TRAIT1_REF.do_something();
// Same as above
//~ MONO_ITEM fn <mod1::NeedsDrop as mod1::Trait1Gen<u8>>::do_something @@ vtable_through_const-mod1.volatile[External]
//~ MONO_ITEM fn <mod1::NeedsDrop as mod1::Trait1Gen<u8>>::do_something_else @@ vtable_through_const-mod1.volatile[External]
mod1::TRAIT1_GEN_REF.do_something(0u8);
//~ MONO_ITEM fn mod1::id::<char> @@ vtable_through_const-mod1.volatile[External]
mod1::ID_CHAR('x');
}
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