# SRFI 253: Data (Type-)Checking

## 0.3.1 - 2026-08-20

### Fixed

- Fixed a bug in the expanded code for `define-checked` where if no return types were specified an
  invalid type declaration would be made. This only applied to compiled code, where type
  declarations are checked.

## 0.3.0 - 2026-08-16

### Added

- Added support for return type declarations from SRFI 273.

### Changed

- CI now executes tests in CHICKEN 5.4.0 and CHICKEN 6.0.0

## 0.2.0 - 2025-12-20

### Added

- Support for CHICKEN 6
- `csc` specific version of `check-case` that uses `compiler-typecase`. Thanks to Artyom Bologov for
  contributing this patch from upstream!

### Changed

- Tests now depend on the `test` egg instead of SRFI 64

## 0.1.0 - 2024-11-16

### Added

- Initial Release.