c8ea27553d
* Allow returning structs if copy This commit does three things: 1. enables marshalling of structs as return args from interface funcs but so far *only* for the case when the struct itself is copy 2. puts bits that use `std::convert::TryInto` in a local scope to avoid multiple reimports 3. for added clarity, we now print for which `tref` type the marshalling of results is unimplemented The first case (1.) is required to make `fd_fdstat_get` WASI interface func work which returns `Fdstat` struct (which is copy). The second case (2.) caused me some grief somewhere along the lines when I was playing with snapshot1. Putting the code that requires it inside a local scope fixed all the issues * Add proptests for returing struct if copyable * Use write_ptr_to_guest to marshal value to guest * Successfully return non-copy struct
wiggle
An experimental implementation of bytecodealliance/wig crate which
generates Rust bindings from *.witx that are meant to be more idiomatic
and hopefully allowing for easier polyfilling between different WASI
snapshot versions in the future.