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Showing content from https://github.com/rust-lang/rust/issues/74935 below:

Tracking Issue for the use of `?` in constants · Issue #74935 · rust-lang/rust · GitHub

The ? operator expands to invoking Try::into_result for the argument and Into::into for the error of the result. In order to support these, we need to

• Figure out traits-in-const: Tracking Issue for removing impl const and ~const in the standard library #110395
• stabilize impl const Trait for Type items Tracking Issue for RFC 3762, "Make trait methods callable in const contexts" #143874
• implement const Try for Result and Option in libstd Constify Try, From, TryFrom and relevant traits #143768

mpfaff, bobbbay, ssg, joseluis, jwodder and 10 morebjoernager and Farossco

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