Function type definition with anonymous arguments and optional parentheses for single argument

Suggestion

🔍 Search Terms

anonymous type argument, optional parentheses

List of keywords you searched for before creating this issue. Write them down here so that others can find this suggestion more easily and help provide feedback.

✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestion

Like a anonymous function and anonymous type, it could be nice a type definition with anonymous arguments. Also, as in function definition, function type definition with single argument, the parentheses could be optional.

📃 Motivating Example

This simple enhancement let a more clean and lean code syntaxe.

💻 Use Cases

// currently
function f(callback:(...args: string[]) => void) { ... }

// anonymous arguments
function f(callback: (...string[]) => void) { ... }

// anonymous argument + optional parentheses
function f(callback: ...string[] => void) { ... }

L’issue non identifica alcun file di implementazione, punto di ingresso o test; inizia dai suoi esempi motivanti e dalle forme sintattiche richieste. Il lavoro sarà completato quando le forme per argomenti anonimi e parentesi opzionali saranno accettate come descritto, senza modificare il JavaScript emesso, e sarà aggiunta la copertura di regressione.