co3 0.3.1

Build C API from Rust
Documentation 
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error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:13:6
   |
13 | enum PrimitiveEnumWithDrop {
   |      ^^^^^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `PrimitiveEnumWithDrop: <PrimitiveEnumWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:11:20
   |
11 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot cast enum `PrimitiveEnumWithDrop` into integer `u8` because it implements `Drop`
  --> tests/ui_fail/impl_drop_assert.rs:11:20
   |
11 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   |
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:30:6
   |
30 | enum TransparentEnumWithDrop {
   |      ^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `TransparentEnumWithDrop: <TransparentEnumWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:28:27
   |
28 | #[derive(Clone, RustSpec, ReprC)]
   |                           ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:46:6
   |
46 | enum ReprCDataEnumWithDrop {
   |      ^^^^^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `ReprCDataEnumWithDrop: <ReprCDataEnumWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:44:20
   |
44 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:62:6
   |
62 | enum DataEnumWithDrop {
   |      ^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `DataEnumWithDrop: <DataEnumWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:60:20
   |
60 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:76:6
   |
76 | enum ReprRustDataEnumWithDrop {
   |      ^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `ReprRustDataEnumWithDrop: <ReprRustDataEnumWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:75:20
   |
75 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
  --> tests/ui_fail/impl_drop_assert.rs:90:8
   |
90 | struct ReprCStructWithDrop(u8);
   |        ^^^^^^^^^^^^^^^^^^^ cannot infer type
   |
note: multiple `impl`s satisfying `ReprCStructWithDrop: <ReprCStructWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
  --> tests/ui_fail/impl_drop_assert.rs:88:20
   |
88 | #[derive(RustSpec, ReprC)]
   |                    ^^^^^
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
   --> tests/ui_fail/impl_drop_assert.rs:102:8
    |
102 | struct TransparentStructWithDrop(u8);
    |        ^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
    |
note: multiple `impl`s satisfying `TransparentStructWithDrop: <TransparentStructWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
   --> tests/ui_fail/impl_drop_assert.rs:100:27
    |
100 | #[derive(Clone, RustSpec, ReprC)]
    |                           ^^^^^
    = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0283]: type annotations needed
   --> tests/ui_fail/impl_drop_assert.rs:112:8
    |
112 | struct ReprRustStructWithDrop(u8);
    |        ^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
    |
note: multiple `impl`s satisfying `ReprRustStructWithDrop: <ReprRustStructWithDrop as _::AssertNoDrop>::assert_no_drop::CustomDropIsNotSupported<_>` found
   --> tests/ui_fail/impl_drop_assert.rs:111:20
    |
111 | #[derive(RustSpec, ReprC)]
    |                    ^^^^^
    = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0509]: cannot move out of type `TransparentEnumWithDrop`, which implements the `Drop` trait
  --> tests/ui_fail/impl_drop_assert.rs:28:27
   |
28 | #[derive(Clone, RustSpec, ReprC)]
   |                           ^^^^^
   |                           |
   |                           cannot move out of here
   |                           data moved here because `_0` has type `String`, which does not implement the `Copy` trait
   |
   = note: this error originates in the derive macro `ReprC` (in Nightly builds, run with -Z macro-backtrace for more info)