diff --git a/docs/_posts/2021-05-31-luau-recap-may-2021.md b/docs/_posts/2021-05-31-luau-recap-may-2021.md index 2c351b72..940d62bc 100644 --- a/docs/_posts/2021-05-31-luau-recap-may-2021.md +++ b/docs/_posts/2021-05-31-luau-recap-may-2021.md @@ -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