@let fn = (a, b) =>   componentValue + a + b;
One: {{fn(0, 1)}}

@if (true) {
  Two: {{fn(1, 1)}}

  <button (click)="   componentValue = fn(2, 1)"></button>
  <button (click)="   componentValue => fn(2, 1)"></button>
}


{{[(a) =>    a +    1][0](1000)}}
{{[(a   ) => a + 1 +   componentProp][0](1000)}}


@let a = 1;

@if (true) {
  @let b = 2;

  @if (true) {
    @let c = 3;
    {{(() =>    a + b + c)()}}
  }
}