Structured Selection
Using alt+shift+up
and alt+shift+down
selects larger or smaller portion of the AST. It allows for quick selection of sub-expressions or statements.
Note
Shortcuts are platform-dependent, and can be re-configured in the Keys
preference page. The actions are named Select Enclosing Element and Restore Last Selection.
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Hovering over the selection will also bring up a dialog dispaying the inferred type of the selected expression, just as it would if you put the cursor on a specific element.