# Changelog

## [2.1.6] - 2024-01-20
### Added
- Safe getter function for the tape

## [2.1.3] - 2023-07-26
### Added
- Expose the Movement enum

## [2.1.2] - 2023-07-25
### Fixed
- The previous version introduced a bug in the `finished` function. This has been fixed: "finished" is when the current state is final (nothing more, nothing less)

## [2.1.1] - 2023-07-22
### Fixed
- The `finished` function now assumes that it has finished if the current instruction does not exist in the instruction set. This fixes a bug where the machine would not finish if the last instruction was not defined. 

## [2.1.0] - 2023-07-22
### Added
- Syntax support for wrinting the definitions (`I`, `F`, `compose` and the tape) in any order.
- Error handling for when there are no final states or no intial state.

### Changed
- Updated minor version of dependencies
- Now parsing an instruction can return an error if the instruction is not valid.
- Now defining instructions is optional. If no instructions are defined, the turing machine will be empty apart from the composed libraries.

### Fixed
- Syntax support for the movements `I` (Izquierda) and `D` (Derecha).
- The `finished` function now takes into account the movement in addition to whether the state is final or not. This is to avoid having to do an extra step after finishing to execute the last instruction.

## [2.0.2] - 2023-07-18
### Fixed
- All of the libraries' code was missing a semicolon at the end of each line.

### Added
- A new test for checking that multiple libraries can be composed at once.
- A new test for checking that all libraries compile and are valid.

## [2.0.0] - 2023-07-16
### Added
- Syntax support for the movements `I` (Izquierda) and `D` (Derecha).
- Syntax support for composing libraries.
- Multiple integrated libraries for Turing Machines:
    - `sum`
    - `x2`
    - `mod`
    - `div2`
    - `bound_diff`
- A new test for checkinf that library names are recognized.
- A new test for checking that the composition syntax is recognized.
- Documentation
- Three new enums for returning errors and warnings from the compiler (`CompilerError` with `ErrorPosition` and `CompilerWarning`).

### Changed
- The return value of `TuringMachine::new`. It now can return either a [`CompilerError`](https://docs.rs/turing-lib/latest/turing_lib/enum.CompilerError.html) or a tuple with the turing machine and a vector of [`CompilerWarning`s](https://docs.rs/turing-lib/latest/turing_lib/enum.CompilerWarning.html).

### Fixed
- The function `handle_error` now just prints the error returned by the compiler.


## [1.1.3] - 2023-03-27
### Added
- The GPL-2.0 license.
- Contributing guidelines.
- The Readme file.
- The github workflow for testing the library on release.

## [1.1.2] - 2023-03-27
### Added
- Initial release of the library.