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also address TyStr in the null pointer optimization

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This commit is contained in:
Oliver 'ker' Schneider 2016-11-13 21:56:57 +01:00
parent f71c31c0e8
commit 2c34d6558c
1 changed files with 2 additions and 2 deletions
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4
src/interpreter/mod.rs
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@ -734,12 +734,12 @@ impl<'a, 'tcx> EvalContext<'a, 'tcx> {
ty::TyRef(_, ty::TypeAndMut { ty, .. }) |
ty::TyRawPtr(ty::TypeAndMut { ty, .. }) |
ty::TyBox(ty) => {
assert!(!self.type_is_sized(ty));
match (field_index, &self.tcx.struct_tail(ty).sty) {
(1, &ty::TyStr) |
(1, &ty::TySlice(_)) => Ok(self.tcx.types.usize),
(1, &ty::TyTrait(_)) |
(0, _) => Ok(self.tcx.mk_imm_ptr(self.tcx.types.u8)),
_ => bug!("invalid fat pointee type"),
_ => bug!("invalid fat pointee type: {}", ty),
}
}
_ => Err(EvalError::Unimplemented(format!("can't handle type: {:?}, {:?}", ty, ty.sty))),