if is not allowed in a const fn

[AndreKR]

I'm compiling this crate because it's a dependency of the clipboard-win crate that I'm using.

It used to work alright, but today I'm re-compiling and I get an error message:

   Compiling error-code v2.0.1
error[E0658]: `if` is not allowed in a `const fn`
   --> c:\dev-tools\Rust\.cargo\registry\src\git.luolix.top-1ecc6299db9ec823\error-code-2.0.1\src\lib.rs:141:13
    |
141 | /             if self.code == 10035 {
142 | |                 return true;
143 | |             }
    | |_____________^
    |
    = note: see issue #49146 <https://github.com/rust-lang/rust/issues/49146> for more information
    = help: add `#![feature(const_if_match)]` to the crate attributes to enable

I'm on rustc 1.45.0-nightly (f8d394e51 2020-05-05).

[DoumanAsh]

ah this is stable in 1.46

Do you not upgrade your nightly often?
I normally only follow 1.46
Although I guess I can revert 4d6f3ee

[AndreKR]

Well, actually I wanted to simply upgrade my nightly, but I ran into another issue with that.

I opened this issue because I figured something like that is probably a breaking change or requires some kind of feature gate or something like that? (I'm quite new to Rust, so I don't know for sure.)

[AndreKR]

As far as I'm concerned I found a nightly now (nightly-2020-08-29) where both issues are ok.

[DoumanAsh]

yeah I'm normally lazy so I don't really worry about backward compatibility.
I can revert code and do not use if in const fn if you want so let me know

[DoumanAsh]

Reverted it for now, released as 2.0.2