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replace some transmutes with safe pointer casts #795

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replace some transmutes with safe pointer casts #795

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38 changes: 10 additions & 28 deletions src/experimental/scene.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -285,21 +285,11 @@ impl Cell {
capabilities: vec![],
used,
permanent: false,
ready: unsafe {
std::mem::transmute(&(Node::ready as fn(RefMut<T>)) as *const fn(RefMut<T>))
},
update: unsafe {
std::mem::transmute(&(Node::update as fn(RefMut<T>)) as *const fn(RefMut<T>))
},
fixed_update: unsafe {
std::mem::transmute(&(Node::fixed_update as fn(RefMut<T>)) as *const fn(RefMut<T>))
},
draw: unsafe {
std::mem::transmute(&(Node::draw as fn(RefMut<T>)) as *const fn(RefMut<T>))
},
virtual_drop: unsafe {
std::mem::transmute(&(virtual_drop::<T> as fn(*mut ())) as *const fn(*mut ()))
},
ready: (&(Node::ready as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast(),
update: (&(Node::update as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast(),
fixed_update: (&(Node::fixed_update as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast(),
draw: (&(Node::draw as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast(),
virtual_drop: &(virtual_drop::<T> as fn(*mut ())) as *const fn(*mut ()),
data_len: std::mem::size_of::<T>(),
initialized: false,
}
Expand All @@ -312,19 +302,11 @@ impl Cell {
let (_, vtable) = unsafe { std::mem::transmute::<_, (*mut (), *mut ())>(trait_obj) };

self.vtable = vtable;
self.ready =
unsafe { std::mem::transmute(&(Node::ready as fn(RefMut<T>)) as *const fn(RefMut<T>)) };
self.update = unsafe {
std::mem::transmute(&(Node::update as fn(RefMut<T>)) as *const fn(RefMut<T>))
};
self.fixed_update = unsafe {
std::mem::transmute(&(Node::fixed_update as fn(RefMut<T>)) as *const fn(RefMut<T>))
};
self.draw =
unsafe { std::mem::transmute(&(Node::draw as fn(RefMut<T>)) as *const fn(RefMut<T>)) };
self.virtual_drop = unsafe {
std::mem::transmute(&(virtual_drop::<T> as fn(*mut ())) as *const fn(*mut ()))
};
self.ready = (&(Node::ready as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast();
self.update = (&(Node::update as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast();
self.fixed_update = (&(Node::fixed_update as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast();
self.draw = (&(Node::draw as fn(RefMut<T>)) as *const fn(RefMut<T>)).cast();
self.virtual_drop = &(virtual_drop::<T> as fn(*mut ())) as *const fn(*mut ());

unsafe {
std::ptr::copy_nonoverlapping::<T>(&data as *const _ as *mut _, self.data as *mut _, 1);
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