10.2 Exceptions🔗ℹ

Returns the value(s) of the body sequence, but runs the body or expression of an ~initially clause when entering the try body (whether normally or by a continuation jump) and the body or expression of a ~finally clause when leaving the try body (whether normally or by a continuation jump, including exception throws).

If an exception is thrown during the the body sequence, the control escapes to the context of the try body sequence (i.e., “inside” the ~initially and ~finally guards) and the ~catch cases are tried in order. When a ~catch binding matches, then the result of the try form is the body of the ~catch clause. If no ~catch clause matches, the exception is re-thrown. Breaks are disabled while attempting to match a ~catch clause or evaluating its body.

The last body form of try are not in tail position is any of ~initially, ~catch, or ~finally is present. If none are present, the try form is the same as begin.