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[MIR] Add PointerCast for Unsize casts of fat pointers. - #33734
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This is actually type_of::in_memory_type_of.
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Ah, I looked in type_ but not type_of I guess.
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Actually, type_of::in_memory_type_of isn't what I want. For &Trait it returns {T*, (vtable)} whereas I'm only trying to cast the base and thus want just T*.
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You'd want to call it on the pointee type, which you can easy get, by changing the second &ty::TyRawPtr(..) pattern to &ty::TyRawPtr(mt) and using mt.ty.
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Ok, just pulled that out into type_of::fat_ptr_base_ty since I need to call it from 2 different places and the second is not already within a match giving easy access to mt.ty.
eddyb
commented
May 19, 2016
LGTM, except for using LLVM to get at information we already have. |
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94f0918Comparearielb1
commented
May 19, 2016
@bors r+ rollup |
bors
commented
May 19, 2016
📌 Commit 94f0918 has been approved by |
…=arielb1 [MIR] Add PointerCast for Unsize casts of fat pointers. Fixesrust-lang#33387. r? @eddyb
Fixes#33387.
r? @eddyb