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2022-08-22safe transmute: use `Assume` struct to provide analysis optionsJack Wrenn-17/+16
This was left as a TODO in #92268, and brings the trait more in line with what was defined in MCP411. `Assume::visibility` has been renamed to `Assume::safety`, as library safety is what's actually being assumed; visibility is just the mechanism by which it is currently checked (this may change). ref: https://github.com/rust-lang/compiler-team/issues/411 ref: https://github.com/rust-lang/rust/issues/99571
2022-07-27safe transmute: test when `ASSUME` params are passed indirectlyJack Wrenn-0/+73
ref: https://github.com/rust-lang/rust/pull/92268/files#r925258420
2022-07-27Initial (incomplete) implementation of transmutability trait.Jack Wrenn-0/+41
This initial implementation handles transmutations between types with specified layouts, except when references are involved. Co-authored-by: Igor null <m1el.2027@gmail.com>