Show signature help for contextual callback

[ackvf]

TypeScript Version: 2.9.2 and 3.0.0-dev.20180626

Search Terms:
jsx props intellisense

Code

import Table from 'antd/lib/table'
//...
render() {
  return (
    <Table.Column render={(){/*<- cursor between braces*/}}/>
  )
}

Expected behavior:

Expected is that intellisense for the inserted brace of an arrow gives correct param types.

node_modules\antd\lib\table\interface.d.ts
render?: (text: any, record: T, index: number) => React.ReactNode;

Actual behavior:

Playground Link:

https://github.com/ackvf/typescript-repro/tree/render-prop

Related Issues:
#25266

I think the same situation occurs without JSX:

interface Props {
    render: (n: number) => void;
}
declare function foo(props: Props): void;
foo({ render: /**/ });

Delete the /**/ and type (. SIgnature help will show foo(props: Props): void. It doesn't show the signature of the callback you're supposed to provide. Isn't that the same issue as the above?

[ackvf]

Yes @Andy-MS , I guess the expected and exhibited behavior in your example is the same.
When you invoke the intellisense inside the brace foo({/*here*/}) it does provide a hint render: (n: number) => void, but not when invoked inside the render as in your example.

Another case from #13304:

interface I {
    m(x: number): void;
}
declare function f(i: I): void;
f({ m() {} });

Between the () in m(), we should get the signature of m, not the signature of f.