recover ( ..a try: ( ..a -- ..b ) recovery: ( ..a error -- ..b ) -- ..b )
Factor handbook » The language » Exception handling

Prev:	cleanup ( try cleanup-always cleanup-error -- )
Next:	ignore-errors ( ... quot: ( ... -- ... ) -- ... )

Vocabulary
continuations

Inputs

try	a quotation with stack effect ( ..a -- ..b )
recovery	a quotation with stack effect ( ..a error -- ..b )

Outputs
None

Word description
Calls the try quotation. If an exception is thrown in the dynamic extent of the try quotation, restores the data stack and calls the recovery quotation to handle the error.

See also
cleanup, finally

Definition

USING: continuations.private kernel sequences ;

IN: continuations

: recover
    ( ..a try: ( ..a -- ..b ) recovery: ( ..a error -- ..b ) -- ..b )
    [
        [
            [ (get-catchstack) push ] dip call
            (get-catchstack) pop*
        ] curry
    ] dip ifcc ; inline