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| # Changelog | ||
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| All notable changes to this project will be documented in this file. | ||
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| The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), | ||
| and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). | ||
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| ## [Unreleased] | ||
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| ### Added | ||
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| - Enabled `programmable-pattern-matching` extension. | ||
| - Non-string version of special `scm.` form. | ||
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| ### Changed | ||
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| - Updated for Shen 22.3. | ||
| - `if` branches with a known test result are optimized away. | ||
| - Faster equality check against literal numbers. | ||
| - Faster globals. | ||
| - Various other optimizations. | ||
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| ## [0.22] - 2019-10-01 | ||
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| ### Changed | ||
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| - Updated for Shen 22.1. | ||
| - Replace factorisation implementation with extension from kernel. | ||
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| ## [0.21] - 2019-09-26 | ||
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| ### Added | ||
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| - Integrated new `features` extension provided by the latest Shen kernel release. | ||
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| ### Changed | ||
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| - Updated for Shen 22.0. | ||
| - Arguments to the shen-scheme binary have changed, and the launcher extension provided by the latest Shen kernel release is used, pass the `--help` argument to the executable to see the new format. | ||
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| ## [0.20] - 2019-09-23 | ||
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| ### Added | ||
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| - Added flag to allow disabling of pattern factorization. | ||
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| ### Changed | ||
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| - Improve pattern factorization by only hoisting labels that get jumped to from more than one place. | ||
| - Improve pattern factorization by generating fewer `ifs` in cases where the conditions can be merged into a single `if` + `and`. | ||
| - Compile chains of `cons` calls that result in a properly formed list into a single `list` call. | ||
| - Multiple aesthetic changes to the Scheme code the compiler generates. | ||
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| ## [0.19] - 2019-09-22 | ||
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| ### Added | ||
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| - Implemented pattern matching optimization. Speedup goes from modest in simple patterns to huge in patterns that deconstruct larger structures. | ||
| - Added missing `*release*` variable. | ||
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| ### Changed | ||
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| - Updated for Shen 21.2. | ||
| - Functions generated by compiling `defun` expressions are not wrapped in `begin` expressions anymore. | ||
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| ## [0.18] - 2019-09-02 | ||
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| ### Added | ||
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| - Add `shen-scheme.find-library` function that returns a path where libraries can be added. | ||
| - Add support for Scheme's `letrec` through the `scm.letrec` form. | ||
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| ### Changed | ||
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| - Updated for Shen 21.1. | ||
| - Updated Chez dependency from 9.5 to 9.5.2. | ||
| - Don't flush ports after calling `write-byte` unless the port is stdout or stderr. | ||
| - Override `pr` with a better performing implementation. | ||
| - Override `vector` constructor with better performing implementation. | ||
| - Override `@p` tuple constructor with better performing implementation. | ||
| - Make `sysfunc?` return true for `scm.` prefixed symbols. | ||
| - Remove "whoami" dependency. | ||
| - Fix compilation of `let`. Was not working correctly in where the variable name showed up on the right-side. | ||
| - Compile `(thaw ...)` expressions to direct function calls. | ||
| - Use path relative to shen-scheme executable as home. | ||
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| ## [0.17] - 2018-02-17 | ||
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| ### Added | ||
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| - Add support for `(scm. "(literal scheme code)")` forms. | ||
| - Add `--eval <expression>` command-line option. | ||
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| ### Changed | ||
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| - Updated for Shen 21. | ||
| - Reduce overhead of `trap-error` in most situations. | ||
| - Return numbers when calling `intern` with numeric strings. | ||
| - Optimise calls to `(intern "StringConstant")`. | ||
| - Fix dicts not working properly with some key value types. | ||
| - Fix `symbol?` override so that it behaves like the Shen Kernel version. | ||
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| ## [0.16] - 2018-01-13 | ||
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| ### Changed | ||
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| - Updated for Shen 20.1. | ||
| - Totally rewritten compiler in Shen. | ||
| - Swiched platform to Chez Scheme. | ||
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| ### Removed | ||
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| - Dropped support for Gauche Scheme and Chibi Scheme. | ||
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| [Unreleased]: https://github.com/tizoc/shen-scheme/compare/0.22...HEAD | ||
| [0.22]: https://github.com/tizoc/shen-scheme/compare/0.21...0.22 | ||
| [0.21]: https://github.com/tizoc/shen-scheme/compare/0.20...0.21 | ||
| [0.20]: https://github.com/tizoc/shen-scheme/compare/0.19...0.20 | ||
| [0.19]: https://github.com/tizoc/shen-scheme/compare/0.18...0.19 | ||
| [0.18]: https://github.com/tizoc/shen-scheme/compare/0.17...0.18 | ||
| [0.17]: https://github.com/tizoc/shen-scheme/compare/0.16...0.17 | ||
| [0.16]: https://github.com/tizoc/shen-scheme/compare/chibi-shen-0.15...0.16 |