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Added missing items and fixed confusing function declaration example

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Vyacheslav Egorov 2021-05-31 20:51:00 +03:00
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docs/_posts/2021-05-31-luau-recap-may-2021.md
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@ -10,7 +10,7 @@ Luau is our new language that you can read more about at [https://roblox.github.
## Named function type arguments
We've updated Luau syntax to support optional names of arguments inside function types.
The syntax follows the same format as regular function argument declarations: `(a: number, b: string): string`
The syntax follows the same format as regular function argument declarations: `(a: number, b: string)`
Names can be provided in any place where function type is used, for example:
@ -28,7 +28,7 @@ local function foo(cb: (name: string) -> ())
Variadic arguments cannot have an extra name, they are already written as ...: number.
These names are used for documentation purposes and we also plan to display them in Roblox Studio auto-complete and type hovers.
They do not affect how the typechecking of Luau code is performed.
They do not affect how the typechecking of Luau scripts is performed.
## Typechecking improvements
@ -43,9 +43,10 @@ Speaking of typechecking, we've implemented many improvements this month:
* Fixed a bug which caused spurious unknown global errors
We've also added new checks to our linter:
* A new pass will report uses of deprecated Roblox APIs
* A new check will report uses of deprecated Roblox APIs
* We will warn for global functions that are defined inside local functions
* New warning is generated if array loop starts or ends on index '0', but the array is indexed from '1'
* FormatString lint will now check string patterns for `find`/`match` calls via `:` when object type is known to be a string
We also fixed one of the sources for "Free types leaked into this module's public interface" error message and we are working to fix the remaining ones.
@ -57,7 +58,11 @@ We continue to improve our built-in support for auto-complete that will be used
As part of this work we will improve the type information provided by Roblox APIs to match actual arguments and results.
## Behavior changes
We've made an improvement for an error message, when a relational comparison fails at runtime, we now specify the comparison direction in the error message (e.g. `attempt to compare nil <= number`)
## Performance improvements
* Improved performance of table lookup with an index operator and a string: `t["name"]`
* Fixed an issue with increasing memory usage in Parallel Luau beta
* Bytecode compilation is now ~5% faster which can improve server startup time for games with lots of scripts