Type checking generic middleware

[Bielik20]

Search Terms

generic middleware

Suggestion

Ability to infer type of chain of generic functions.

Use Cases

Before creating this issue I created a question on stackoverflow. This underlies what I am trying to achieve.

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, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

[RyanCavanaugh]

Please file a new issue where you fill in the template to a degree where it can be read here, not elsewhere.