Goop 1.3.0

Goop 1.3.0

Goop 1.3.0 adds native Go interface implementations, allowing Goop record
types to satisfy interfaces such as fmt.Stringer and slog.Handler without
writing an @[go] wrapper for their methods.

Highlights

• implements declarations: implements Interface for Type with … end
  generates pointer-receiver Go methods and a compile-time interface
  assertion.
• Go type imports: use type Name inside an import go signature block
  to import opaque Go named types and interfaces.
• FFI value types: error, 'a ptr (ptr_of, null, is_null), and
  'a go_slice plus length, append, and list-conversion helpers.
• Examples: native
  fmt.Stringer and
  slog.Handler
  implementations.

Verification

• goop check docs/examples/go_implements_stringer.goop
• goop check docs/examples/go_implements_slog_handler.goop
• goop test tests/
• Verify generated Go accepts the emitted fmt.Stringer and slog.Handler
  assertions during the example builds.