On 16/07/2013 19:52, Svetoslav Neykov wrote:
On 15.07.13 23:37, Patrick Walton wrote: >On 7/14/13 1:04 PM, Svetoslav Neykov wrote: >> ยท"unsafe" is not a normal block and doesn't return a value, can't be >> used as an expression. This made it impossible to wrap the unsafe casts >> from fixed memory locations to borrowed pointers in macros. Instead I >> had to use inline functions and assign the resulting value to a local >> function variable. > >This should not be the case. There may be a bug in the way macros >interact with unsafe checking. Do you have a test case by any chance?Yes, my bad. I double checked, there is no problem using "unsafe" as an expression or wrapping it inside of a macro.The real problem, turns out, is that the macro can't be used as an expression unless wrapped inside parentheses.GPIOD!().MODER //doesn't compile (error: unexpected token: `.`) (GPIOD!()).MODER //OK Svetoslav. _______________________________________________ Rust-dev mailing list Rust-dev@mozilla.org https://mail.mozilla.org/listinfo/rust-dev
Yes I believe this is filed under the following ticket:" Syntax extensions (and macros) that start a line want to be a whole statement"
https://github.com/mozilla/rust/issues/5941(I noted on that bug that we could probably provide a better error message here.)
Cheers,
-Felix
--
irc: pnkfelix on irc.mozilla.org
email: {fklock, pnkfelix}@mozilla.com
_______________________________________________ Rust-dev mailing list Rust-dev@mozilla.org https://mail.mozilla.org/listinfo/rust-dev
