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Smart structural generic type inference support #23733
Description
TypeScript Version: 2.8.1
Problem: when there are too many generic parameters (e.g. nested generic interfaces), it gets hard to remember the order of those parameters. Some smart structural generic type inference needed.
Code
type ComplexGeneric1<TArg1, TArg2>={
arg1:TArg1,
arg2:TArg2,
}
type ComplexGeneric2<TArg1, TArg2>={
arg1:TArg1,
arg2:TArg2,
}
interface IMyInterface<TArg11=number,TArg12=number, TArg21=number, TArg22=number>
{
myFunc(p1:ComplexGeneric1<TArg11, TArg12>, p2:ComplexGeneric2<TArg21, TArg22>);
}
var actualImplementation:IMyInterface<number,string,number, string>={
myFunc(p1,p2)
{
//
}
}There should be a way to declare IMyInterface generic to be able to create implementation the following way:
var desiredImplementation:IMyInterface<{
p1:{arg1:number, arg2:string},
p2:{arg1:number, arg2:string}
}>=
{
myFunc(p1,p2)
{
//p1.arg1 = 123
//p1.arg2 = "hello world"
}
}Is there a way to define IMyInterface to make it happen? Am I the only one who would like to have it?
I would expect something like this to work, but it doesn't:
interface IMyInterface<TStructure extends ({p1: {arg1:TArg11, arg2:TArg12},p2:{arg1:TArg21, arg2:TArg22}}), TArg11=number,TArg12=number, TArg21=number, TArg22=number>
{
myFunc(p1:ComplexGeneric1<TArg11, TArg12>, p2:ComplexGeneric2<TArg21, TArg22>);
}
Activity
AlCalzone commentedon Apr 27, 2018
Is this #23696 possibly what you want?
mhegazy commentedon Apr 27, 2018
indeed a duplicate of #22631 and should be fixed by #23696
typescript-bot commentedon May 14, 2018
Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.