Pre-RFC / discussion: Legal transmute between repr(Rust) with repr(transparent) members

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It's being worked on. Main thread:

[Pre-RFC v2] Safe Transmute

This is an updated version of the proposal originally discussed at [Pre-RFC]: Safe Transmute , incorporating extensive feedback from that thread, and further design work from both Ryan Levick and myself. Thanks to everyone who contributed in that thread! Safe(r) Transmute Authors: Ryan Levick, Josh Triplett Transmuting one type to another type and vice versa in Rust is extremely dangerous---so much so that the docs for std::mem::transmute are essentially a long list of how to avoid doing so. …