Trait FromArgValue

pub trait FromArgValue: Sized {
    // Required method
    fn from_arg_value(value: &str) -> Result<Self, String>;
}

Types which can be constructed from a single commandline value.

Any field type declared in a struct that derives FromArgs must implement this trait. A blanket implementation exists for types implementing FromStr<Error: Display>. Custom types can implement this trait directly.

Required Methods

fn from_arg_value(value: &str) -> Result<Self, String>

Construct the type from a commandline value, returning an error string on failure.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> FromArgValue for T

where T: FromStr, T::Err: Display,