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Compile-time check for repr(c) on param structs #6

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mullr opened this issue May 9, 2019 · 0 comments

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mullr commented May 9, 2019 •

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Make this a separate crate - we'll open source it!
Make a ReprCCompatible trait
Implement the trait on primitive types
Make a derive macro which implements the trait and generates static assertions
about the struct members.

  // IN
  #[derive(ABI)]
  struct Foo {
    x: MyThing
  }

  // OUT
  #[repr(C)]
  struct Foo {
      x: MyThing
  }

  impl ABI for Foo {
      fn _hidden_static_asserts() {
          assert_impl!(MyThing, ABI);
      }
  }

References:
- https://gankro.github.io/blah/rust-layouts-and-abis/
- https://crates.io/crates/abi_stable

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