IntelliJ IDEA scala type info

Question

The Eclipse scala plugin has a very nice info. One can hover over pretty much anything be it a function definition, val, var, function call etc and get type info. This is im

Answer 1

Type Info is great in IntelliJ; you have to press the key shortcut to see the type of a given variable or function.

If I recall correctly, there's a conflict between Type Info's key shortcut and something else in IntelliJ. If you go to Settings -> Keymap -> Plug-ins -> Scala -> Type Info, double-click it, you'll see the conflicts. I changed mine to Option ⌘ =. (see this answer for more tips if it still doesn't work)

Another shortcut I use quite a lot to quickly look up a definition is ⌘ shift I.

Answer 2

Intellij IDEA 14 (OSX) has this option in the Preferences -> Languages and Frameworks -> Scala Compile Server menu option.

Ensure that the Show type info on mouse motion with delay option is ticked.

Answer 3

Not exactly what you're looking for but close enough - you can press alt + '=' when the cursor inside the function name, val name etc., and you will get popup with the type.

Answer 4

To enable on mouse hover type information go to Settings->Scala and select the "Show type info on mouse motion with delay" checkbox.

Answer 5

I'm using Idea 13.0.2 with scala plugin 0.30.387 -- there is an option to display type info on hover just like eclipse. To turn it on, see

Preferences -> Scala