OneOfN.OneOf4Matcher (formcycle: bom 8.3.8 API)

Type Parameters:

R - Type of the value returned by the mapping function for each case.

T1 - Type of the first case.

T2 - Type of the second case.

T3 - Type of the third case.

T4 - Type of the fourth case.

Enclosing class:

OneOfN
```
public static interface OneOfN.OneOf4Matcher<R,T1,T2,T3,T4>
```
A matcher object that contains a handler for each case and can be used to reduce a sum type to a single value. This interface contains a default implementation for each case that simply returns null.

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default R`	`first(T1 first)`
`default R`	`fourth(T4 fourth)`
`default R`	`second(T2 second)`
`default R`	`third(T3 third)`

- Method Detail
  - first
```
default R first(T1 first)
```
    Parameters:
    
    first - The value of the first case.
    
    Returns:
    
    The mapped value for the first case
  - fourth
```
default R fourth(T4 fourth)
```
    Parameters:
    
    fourth - The value of the fourth case.
    
    Returns:
    
    The mapped value for the fourth case
  - second
```
default R second(T2 second)
```
    Parameters:
    
    second - The value of the second case.
    
    Returns:
    
    The mapped value for the second case
  - third
```
default R third(T3 third)
```
    Parameters:
    
    third - The value of the third case.
    
    Returns:
    
    The mapped value for the third case