Why the former works with the type inference when the latter kotlinlang #android

Channels

kotlin-foundation

compose-android

ohio-kotlin-users

kotlin-by-example

sofl-user-group

kotlin-multiplatform-contest

tricity-kotlin-user-group

kotlin-in-action

android-databinding

cincinnati-user-group

fluid-libraries

codemash-precompiler

kotlingforbeginners

jhipster-kotlin

prozis-android-backup

realworldkotlin

graviton-browser

spring-security

domain-driven-design

connect-audit-events

swiss-user-group

effectivekotlin

refactoring-to-kotlin

russian-kotlinasfirst

androidgithubprojects

introduce-yourself

pocketgitclient

effective-kotlin

algolialibraries

lambdaworld_cadiz

intellij-tricks

kotlin-pakistan

navigation-architecture-component

strife-discord-lib

machinelearningbawas

leedskotlinusergroup

stayhungrystayfoolish

kotest-contributors

practical-functional-programming

swagger-gradle-codegen

100daysofkotlin

kotlinultimatechallenge

pattern-matching

kotlinforbeginners

competitive-programming

compose-ui-showcase

competitivecoding

kotlin-data-storage

skia-wasm-interop-temp

java-to-kotlin-refactoring

event21-community-content

androidx-xprocessing

embedded-kotlin

fb-internal-demo

image-processing

myndocs-oauth2-server

kotlintest-devs

beepiz-libraries

kotlinprogrammers

cscenter-course-2016

k2-early-adopters

intellij-plugins

language-proposals

library-development

refreshversions

language-evolution

kotlinx-datetime

framework-elide

compose-desktop

jvm-ir-backend-feedback

android-architecture

100daysofkotlin-2021

github-workflows-kt

python-contributors

squarelibraries

arrow-contributors

codingconventions

getting-started

Title

l

leosan

02/28/2019, 4:33 PM

Why the former works with the type inference when the latter doesn’t?

s

shubh10

02/28/2019, 4:45 PM

is expected to be of type

Any

and your passing

Any?

. Generally

Any?

is the base class for everything in kotlin.

l

leosan

02/28/2019, 4:50 PM

but why the same method outside the extension works without complaining about type?

d

Dico

02/28/2019, 11:04 PM

The problem is that you get a union type. If it succeeds, you get T, else, you get NetworkErrorHandler.

Which is represented as Any.

Or you get a union with Unit.

Instead of

recover

, consider using

onFailure

Is this a library class? You're normally not able to return

Result

.

s

sitepodmatt

03/01/2019, 1:55 AM

You can fix this by having NetworkErrorHandler return "Nothing" I believe

notice how s is <String> and s2 is <any> the Nothing signals to the compiler it will throw

l

leosan

03/01/2019, 9:07 AM

Oh got it now, thanks guys!

2 Views

#android Join Slack