Version: 5.1
8 Exceptions
| (require unstable/exn) |
This library is unstable; compatibility will not be maintained. See Unstable for more information.
| (network-error s fmt v ...) → void |
| s : symbol? |
| fmt : string? |
| v : any/c |
Like error, but throws a exn:fail:network.
| (exn->string exn) → string? |
| exn : (or/c exn? any/c) |
The subsequent bindings were added by Carl Eastlund <cce@racket-lang.org>.
| (try expr ...+) |
Executes the first expression expr in the sequence, producing its
result value(s) if it returns any. If it raises an exception instead,
try continues with the next expr. Exceptions raised by
intermediate expressions are reported to the current logger at the 'debug
level before continuing. Exceptions raised by the final expression are not
caught by try.
Examples: |
| > (try (+ 1 2) (+ 3 4)) |
3 |
| > (try (+ 'one 'two) (+ 3 4)) |
7 |
| > (try (+ 'one 'two) (+ 'three 'four)) |
+: expects type <number> as 1st argument, given: 'three; |
other arguments were: 'four |