TryFromT

TryFromT is a programming interface used to model fallible conversions between types, where a value of one type can be converted into another type but the conversion might fail.

In a typical design, TryFromT defines an associated error type and a single conversion operation, usually named try_from, that consumes a value and returns a result indicating success or failure.

This pattern contrasts with infallible converters such as From or static casts, where conversions are guaranteed to succeed or fail via panics.

In ecosystems inspired by Rust, a TryFromT-like interface mirrors the standard library’s TryFrom and TryInto traits, with a corresponding TryFromT<Source> for Target and an error type.

Common use cases include parsing, range checks, or format validation, for example converting a string to a numeric type or converting user input to a domain type.

Implementation notes: the trait should be implemented for the target type, with error types expressing what went wrong, and clients should handle the error rather than panic.

See also: TryFrom, TryInto, From, Into.