#[doc(hidden)]pub trait ConversionExpectBuiltin {
// Required method
fn __mx_conversion_expectation(&self) -> Option<String>;
}Expand description
Expectation probe, built-in arm: an error that knows what the value should
have been. A match_arg choice error (MatchArgError, or a SexpError
carrying one, as #[derive(MatchArg)]’s TryFromSexp returns) names its
choices: one of "fast", "slow"; a class error names the class
(a data frame); an Either whose arms both refused the kind of value
names both (one of "fast", "slow", or numeric).
Required Methods§
fn __mx_conversion_expectation(&self) -> Option<String>
Dyn Compatibility§
This trait is dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety".