luau-lang/luau
1
0
Fork 0
mirror of https://github.com/luau-lang/luau.git synced 2025-05-04 10:33:46 +01:00
Code Issues Projects Releases Packages Wiki Activity

Update per review feedback.

Browse source
This commit is contained in:
Andy Friesen 2022-01-28 12:11:35 -08:00
parent c38c75a985
commit 2ebe6d7b12
1 changed files with 34 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
docs/_posts/2022-01-27-luau-recap-january-2022.md
View file

@ -5,15 +5,31 @@ title: "Luau Recap: January 2022"
Luau is our programming language that you can read more about at [https://luau-lang.org](https://luau-lang.org).
[Find us on github](https:llgithub.com/Roblox/luau)!
[Cross-posted to the [Roblox Developer Forum](https://devforum.roblox.com/t/luau-recap-january-2022/).]
## New tostring implementation
## Performance improvements
This change replaces the default number->string conversion with a new algorithm called Schubfach, which allows us to
produce the shortest precise round-trippable representation of any input number very quickly.
The implementation of `tostring` has been rewritten. This change replaces the default number->string conversion with a
new algorithm called Schubfach, which allows us to produce the shortest precise round-trippable representation of any
input number very quickly.
While performance is not the main driving factor, this also happens to be significantly faster than our old implementation (up to 10x depending on the number and the platform).
the bottleneck there.
While performance is not the main driving factor, this also happens to be significantly faster than our old
implementation (up to 10x depending on the number and the platform). the bottleneck there.
---
Make `toNumber(x)` ~2x faster by avoiding reparsing string arguments.
---
Luau compiler now optimizes table literals where keys are constant variables the same way as if they were constants, eg
```lua
local r, g, b = 1, 2, 3
local col = { [r] = 255, [g] = 0, [b] = 255 }
```
## Improvements to type assertions
@ -41,6 +57,10 @@ local hatRecolorMap: RecolorMap = {
---
Accessing a property whose base expression was previously refined will now return the correct result.
## Linter improvements
`table.create(N, {})` will now produce a static analysis warning since the element is going to be shared for all table entries
## Error reporting improvements
When a type error involves a union (or an option), we now provide more context in the error message.
@ -72,17 +92,14 @@ We have brought in the [`coroutine.close`](https://luau-lang.org/library#corouti
## REPL improvements
Added `--interactive` option to run the REPL after running the last script file.
The `luau` REPL application can be compiled from source. It has grown some new features:
Allowed the compiler optimization level to be specified.
Allowed methods to be tab completed
Allowed methods on string instances to be completed
Improved Luau REPL argument parsing and error reporting
Input history is now saved/loaded
* Added `--interactive` option to run the REPL after running the last script file.
* Allowed the compiler optimization level to be specified.
* Allowed methods to be tab completed
* Allowed methods on string instances to be completed
* Improved Luau REPL argument parsing and error reporting
* Input history is now saved/loaded
## Thanks
@ -101,3 +118,5 @@ A special thanks from all the fine folks who contributed PRs over the last few m
* [SnowyShiro](https://github.com/SnowyShiro)
* [vladmarica](https://github.com/vladmarica)
* [xgladius](https://github.com/xgladius)
[Contribution guide](https://github.com/Roblox/luau/blob/2f989fc049772f36de1a4281834c375858507bda/CONTRIBUTING.md)