try ( quot -- ) - Factor Documentation

try ( quot -- )
Factor handbook » The language » Exception handling » The debugger

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Vocabulary
debugger

Inputs

quot	a quotation

Outputs
None

Word description
Attempts to call a quotation; if it throws an error, the error is printed to output-stream, stacks are restored, and execution continues after the call to try.

Examples
The following example prints an error and keeps going:

[ "error" throw ] try "still running..." print

The listener uses try to recover from user errors.

Definition

USING: continuations ;

IN: debugger

: try ( quot -- ) [ print-error-and-restarts ] recover ; inline