andThen

Transforms the encapsulated value if this instance represents success, wrapping the success lambda in result so that any thrown exception is re-encapsulated as a failure rather than propagating.

Unlike Result.map, exceptions from success are caught. Unlike Result.mapCatching, CancellationException is also caught — do not use in suspend contexts.

Failures pass through unchanged.

result { 4 }
  .andThen { it * 2 }                 // Result.success(8)
  .andThen { check(false) { it } }    // Result.failure(IllegalStateException("8"))
  .andThen { 16 }                     // Remains Result.failure(IllegalStateException("8"))

Parameters

See also