can't store an or-ing of Bitflags in a const or static

[sam0x17]

const LEFT_SHARED_MASK: Buttons4 = Buttons4::MINUS | Buttons4::L_STICK | Buttons4::CAPTURE;

results in:

error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
   --> src\main.rs:151:36
    |
151 | const LEFT_SHARED_MASK: Buttons4 = Buttons4::MINUS | Buttons4::L_STICK | Buttons4::CAPTURE;
    |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[sam0x17]

btw I got around this using the lazy_static crate

[nickelc]

You can use Flags::from_bits_truncate and Flags::A.bits or Flags::A.bits() for this.

const MASK: Flags = Flags::from_bits_truncate(Flags::A.bits | Flags::B.bits | Flags::C.bits);
const MASK: Flags = Flags::from_bits_truncate(Flags::A.bits() | Flags::B.bits() | Flags::C.bits());

[KodrAus]

We've also got #244 currently open that would make this a little nicer to write until we can use | in const:

const LEFT_SHARED_MASK: Buttons4 = Buttons4::MINUS.union(Buttons4::L_STICK).union(Buttons4::CAPTURE);

[KodrAus]

We've just released 1.3.0 that supports the above syntax. The issue of being able to use real operators will be blocked upstream for a while, so I'll go ahead and close this one, but one day we should be able to support it!