mirror of
https://github.com/nim-lang/Nim.git
synced 2025-12-30 09:54:49 +00:00
32 lines
647 B
Nim
32 lines
647 B
Nim
|
|
type
|
|
PMenu = ref object
|
|
PMenuItem = ref object
|
|
|
|
proc createMenuItem*(menu: PMenu, label: string,
|
|
action: proc (i: PMenuItem, p: pointer) {.cdecl.}) = nil
|
|
|
|
var s: PMenu
|
|
createMenuItem(s, "Go to definition...",
|
|
proc (i: PMenuItem, p: pointer) {.cdecl.} =
|
|
try:
|
|
echo(i.repr)
|
|
except EInvalidValue:
|
|
echo("blah")
|
|
)
|
|
|
|
|
|
proc noRaise(x: proc()) {.raises: [].} =
|
|
# unknown call that might raise anything, but valid:
|
|
x()
|
|
|
|
proc doRaise() {.raises: [EIO].} =
|
|
raise newException(EIO, "IO")
|
|
|
|
proc use*() =
|
|
noRaise(doRaise)
|
|
# Here the compiler inferes that EIO can be raised.
|
|
|
|
|
|
use()
|