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android-studiokotlinintellij-14

What are the `^let` annotations in Android Studio / IntelliJ?

In a let block, I sometimes see ^let annotations before my statements, and it's not clear to me what they mean or why they are there.

Is it to indicate that a value will be returned as the value of the let call?

Screenshot:

code snippet with ^let annotations

Solution

  • These do in fact show you that those values are going to be returned from the let expression. If you move to cursor to one of these hints and open intention actions (Alt + Enter), you get the option "Do not show lambda return expression hints", which I suppose is the name for this new feature.

    The intention action in the IDE

    This change was introduced in Kotlin 1.2.20, see IntelliJ IDEA Plugin Improvements in this post.