When you open a Wheel project file then the compiler immediately tries to compile the program in the background. This process builds up the initial database.
When the compilation was successful you can hover with your mouse over an identifier in the editor and when information about the identifier can be found then a hint will show up with details about the identifier. Details can be shown about the following types:
If you type the beginning of a known identifier and the wait about a second then the editor will auto complete the word. When there are more identifiers found which begin with the same characters then a popup is shown from which you can select the identifier.
