complete functions with their parameter signature for fat arrow functions

[takahser]

Currently, the settings useCodeSnippetsOnMethodSuggest, javascript.suggest.completeFunctionCalls and typescript.suggest.completeFunctionCalls can be used to complete functions with their parameter signature, when using intellisense.

Unfortunately, this only works for the basic es5 function syntax. It would be nice, if it worked for the es6 fat arrow function syntax as well.

// ES5 (settings work)
var multiplyES5 = function(x, y) {
  return x * y;
};

// ES6 (settings don't work)
const multiplyES6 = (x, y) => { return x * y };

[mjbvz]

As of VS Code 1.31, neither of those cases trigger javascript.suggest.completeFunctionCalls. This will however:

function fun(x, y) {
    return x * y;
};

All three should work

[mjbvz]

Closing this in favor of microsoft/TypeScript#25207

It's not possible for us to fix this reliably on the VS Code side. We really need TS to bring support for this