Destructuring object can´t be an optional type parameter with default value

[xLama]

TS 1.7.0

This is valid ES6 from Mozilla but invalid TS:

function drawES6Chart({size = 'big', cords = { x: 0, y: 0 }, radius = 25} = {}) 
{
 console.log(size, cords, radius);
 // do some chart drawing
}

drawES6Chart({
 cords: { x: 18, y: 30 },
 radius: 30
});

To get it works, we must remove "= {}", so we can`t invoke function without arguments:

function drawES6Chart({size = 'big', cords = { x: 0, y: 0 }, radius = 25} ) 
{
 console.log(size, cords, radius);
 // do some chart drawing
}

drawES6Chart( { }) // ok
drawES6Chart() // Error

But It works with array destructuring :

function drawES6Chart( [size = "big" ,cords = { x: 0, y: 0 }, radius = 25 ] = [] ) 
{
 console.log(size, cords, radius);
 // do some chart drawing
}
drawES6Chart([]); // Ok
drawES6Chart(); // Ok

I think empty object should work with default values:

var {size = 'big', cords = { x: 0, y: 0 } } = {} // Error

Should it work with no default values ?

var {p,q } = {} 

Firefox screenshoot:

[ahejlsberg]

This looks like a duplicate of #2469. I agree we need a fix for this.

[ahejlsberg]

Fix now available as #4598.

[xLama]

Thanks. 👍