Is there a way to auto-fill arguments names?

Question

When I instantiate classes (or call methods) with a large number of parameters I'm always using named arguments. But it's tiring to type each argument name every time:

data class User(val id: String, 
                val name: String,
                val age: Int)

val user = User(id = "1", name = "John", age = 99)

Can IDEA pre-fill parameters like this?

val user = User(
    id = ,
    name = ,
    age = 
)

Would be a cool feature, handy for groovy too. Something you can bring up with the existing Alt+Insert menu. Lodge a request at https://youtrack.jetbrains.com — Strelok, Apr 04 '17 at 03:48

score 35 · Accepted Answer · answered Apr 08 '19 at 19:21

35

There's a great plugin for that: https://plugins.jetbrains.com/plugin/10942-kotlin-fill-class

It autofills the constructor with some default parameters so you can override the ones you want ;)

answered Apr 08 '19 at 19:21

douglas.iacovelli

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This is a great plugin, but it would be awesome if it put the editable boxes around the values so you could tab through them easily. – Yona Appletree Oct 09 '19 at 20:36
You don't need a plugin. https://stackoverflow.com/a/68198623/8429944 – GhostBytes Apr 06 '22 at 19:19

score 22 · Answer 2 · answered Jun 30 '21 at 16:39

22

This is the way:

Right click on the constructor method
Show Context Actions
Add names to call arguments
Profit

answered Jun 30 '21 at 16:39

GhostBytes

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Love it! Why it's not the right answer?! It should be – Asimaruk Sep 22 '21 at 13:41
12

This only works if you have already added the call arguments in place. Remove "someCoolValue" and then try this. You won't see "Add names to call arguments". – tir38 Apr 22 '22 at 19:50

hotkey · Answer 3 · 2017-04-04T14:14:21.650

Though this is not actually generating the whole call template with all the parameter names, it might be helpful anyway.

Kotlin IDEA plugin 1.1.1 suggests the parameter names in auto completion as you start typing them. For the User constructor from the example, start typing:

val u = User(i
              ^

There should be a suggestion id =:

It is inserted if you press Enter or Tab. Then you can continue with the other arguments:

val u = User(id = "123", n
                          ^

Here, name = should appear in suggestions, and so on.

Also, the parameters info popup should help you with it:

score 3 · Answer 4 · answered Apr 04 '17 at 09:30

3

See the following requests:

IDEABKL-6690 Automatic code completion when choosing a signature
IDEABKL-5496 Auto-filling the actual Java call arguments

There is an experimental feature you can enable by adding java.completion.argument.live.template=true into Help | Edit Custom Properties.

answered Apr 04 '17 at 09:30

CrazyCoder

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The experimental feature worked quite well with Java for method calls but not for constructors. However, the OP has a Kotlin tag, and I didn't see any difference with this plugin. – Gobe Jul 29 '18 at 20:53

score 2 · Answer 5 · answered May 06 '20 at 12:25

2

If you already added all the params values in the constructor, Android studio will help you to do that. Just click on the Object, in your case on User, then click on option + enter (on mac) and you will have add names to call arguments.

answered May 06 '20 at 12:25

JPhi Denis

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5
5

score 1 · Answer 6 · answered Apr 04 '17 at 05:14

you can use Live template:

setting > Editor > Live Templates

choice code group and add by Green Plus 1.live Template

now you need fill items

Abbreviation is name for call template code.

in template type your code like it:

    val user = User(
            id = $arg1$,
            name = $arg2$,
            age = $arg3$
    )

$arg1$ means where you can type new and jump by Tab

in code when you type Abbreviation name of your code, can selected and Code Generate there

GoodLuck

Is there a way to auto-fill arguments names?

6 Answers6

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