abi_stable 0.9.0

For doing Rust-to-Rust ffi,writing libraries loaded at program startup.
Documentation 
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use std::ptr;

use crate::{
    marker_type::ErasedObject,
    nonexhaustive_enum::{NonExhaustive,NonExhaustiveVtable_Ref,GetEnumInfo,SerializeEnum},
    utils::{transmute_reference,transmute_mut_reference},
    std_types::{ROption,RCmpOrdering,RSome,RResult,RBoxError},
    traits::IntoReprC,
};





pub(crate) unsafe extern "C" fn drop_impl<E>(this: &mut ErasedObject){
    extern_fn_panic_handling! {
        let this=transmute_mut_reference::<ErasedObject,E>(this);
        ptr::drop_in_place(this);
    }
}


pub(crate) unsafe extern "C" fn clone_impl<E,F,I>(
    this: &ErasedObject,
    vtable:NonExhaustiveVtable_Ref<E,F,I>,
) -> NonExhaustive<E,F,I>
where
    E: GetEnumInfo,
    E: Clone,
{
    extern_fn_panic_handling! {
        let this=transmute_reference::<ErasedObject,E>(this);
        let clone=this.clone();
        NonExhaustive::with_vtable(clone,vtable)
    }
}


pub(crate) unsafe extern "C" fn partial_eq_impl<E,F,I>(
    this: &ErasedObject,
    other: &ErasedObject
) -> bool
where
    E: GetEnumInfo+PartialEq,
{
    extern_fn_panic_handling! {
        let this=transmute_reference::<ErasedObject,E>(this);
        let other=transmute_reference::<ErasedObject,NonExhaustive<E,F,I>>(other);
        match other.as_enum() {
            Ok(other)=>this==other,
            Err(_)=>false,
        }
    }
}

pub(crate) unsafe extern "C" fn cmp_ord<E,F,I>(
    this: &ErasedObject,
    other: &ErasedObject
) -> RCmpOrdering
where
    E: GetEnumInfo+Ord,
{
    extern_fn_panic_handling! {
        let this=transmute_reference::<ErasedObject,E>(this);
        let other=transmute_reference::<ErasedObject,NonExhaustive<E,F,I>>(other);
        
        match other.as_enum() {
            Ok(other)=>this.cmp(other).into_c(),
            Err(_)=>RCmpOrdering::Less,
        }
    }
}

pub(crate) unsafe extern "C" fn partial_cmp_ord<E,F,I>(
    this: &ErasedObject, 
    other: &ErasedObject
) -> ROption<RCmpOrdering>
where
    E: GetEnumInfo+PartialOrd,
{
    extern_fn_panic_handling! {
        let this=transmute_reference::<ErasedObject,E>(this);
        let other=transmute_reference::<ErasedObject,NonExhaustive<E,F,I>>(other);
        
        match other.as_enum() {
            Ok(other)=>this.partial_cmp(other).map(IntoReprC::into_c).into_c(),
            Err(_)=>RSome(RCmpOrdering::Less),
        }        
    }
}


pub(crate) unsafe extern "C" fn serialize_impl<NE,I>(
    this: &ErasedObject
) -> RResult<<I as SerializeEnum<NE>>::Proxy, RBoxError>
where
    I: SerializeEnum<NE>,
{
    extern_fn_panic_handling! {
        let this=transmute_reference::<ErasedObject,NE>(this);
        I::serialize_enum(this).into()
    }
}