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Add loop expressions.

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Stephen Chung
2022-10-29 12:09:18 +08:00
parent 6af66d3ed3
commit c14fbdb14d
10 changed files with 146 additions and 73 deletions
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CHANGELOG.md
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@@ -10,6 +10,7 @@ Bug fixes
* `Engine::parse_json` now returns an error on unquoted keys to be consistent with JSON specifications.
* `import` statements inside `eval` no longer cause errors in subsequent code.
* Functions marked `global` in `import`ed modules with no alias names now work properly.
* Incorrect loop optimizations that are too aggressive (e.g. unrolling a `do { ... } until true` with a `break` statement inside) and cause crashes are removed.
Speed Improvements
------------------
@@ -19,6 +20,12 @@ Speed Improvements
New features
------------
### Loop expressions
* Loops (such as `loop`, `do`, `while` and `for`) can now act as _expressions_, with the `break` statement returning an optional value.
* Normal loops return `()` as the value.
* Loop expressions can be enabled/disabled via `Engine::set_allow_loop_expressions`
### Stable hashing
* It is now possible to specify a fixed _seed_ for use with the `ahash` hasher, via an environment variable, in order to force stable (i.e. deterministic) hashes for function signatures.