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@orclev
Created January 22, 2017 12:18
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pub struct OpenRadioContext<'a, 'b:'a> {
_context: PhantomData<&'b Context>,
usb_context: Box<Context>,
device_handle: DeviceHandle<'a>,
}
impl <'a, 'b> Drop for OpenRadioContext<'a, 'b> {
fn drop(&mut self) {
self.device_handle.release_interface(0).unwrap();
}
}
impl <'a, 'b: 'a> OpenRadioContext<'a, 'b> {
fn open() -> OpenRadioContext<'a, 'b> {
let ctx: Box<Context> = Box::new(Context::new().unwrap()); // Has lifetime b' but Rust doesn't know that
let ctx2: &'b Context = &ctx;
let mut handle = ctx2.open_device_with_vid_pid(0x1915, 0x7777).and_then(|mut hndl: DeviceHandle<'a>| {
hndl.reset();
hndl.set_active_configuration(1).unwrap();
hndl.claim_interface(0).unwrap();
Option::Some(hndl)
}).unwrap();
OpenRadioContext {
_context: PhantomData,
usb_context: ctx,
device_handle: handle,
}
}
}
----
error: `ctx` does not live long enough
--> src/lib.rs:74:34
|
74 | let ctx2: &'b Context = &ctx;
| ^^^ does not live long enough
...
86 | }
| - borrowed value only lives until here
|
note: borrowed value must be valid for the lifetime 'b as defined on the body at 72:42...
--> src/lib.rs:72:43
|
72 | fn open() -> OpenRadioContext<'a, 'b> {
| ^
error: aborting due to previous error
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