erase() & erase_if()

[samchon]

C++20 may define new functions, erase & erase_if in the <experimental/algorithm> module.

• https://en.cppreference.com/w/cpp/experimental/lib_extensions_2#Uniform_container_erasure

namespace std.experimental
{
    export function erase(container: Container<T>, val: T): Iterator<T>;
    export function erase_if(container: Container<T>, predicator: (val: T)=>boolean): Iterator<T>;
}

[samchon]

I implemented the erase() & erase_if() functions under the v2.1 branch. However, I need to review it again. Is it proper to dividing conditional branches such like below?

• tstl/src/experimental/algorithm.ts

  Lines 48 to 65 in 873b363

  	export function erase_if<T>(container: any, predicator: (val: T)=>boolean): void
  	{
  	if (container.remove_if instanceof Function)
  	container.remove_if(predicator);
  	else if (container instanceof SetContainer || container instanceof MapContainer)
  	{
  	for (let it = container.begin(); !(it as any).equals(container.end()); )
  	if (predicator(it.value))
  	it = container.erase(it) as any;
  	else
  	it = it.next();
  	}
  	else
  	{
  	let it = remove_if(container.begin(), container.end(), predicator);
  	container.erase(it, container.end());
  	}
  	}