Trait FromArgValue 

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

Types which can be constructed from a single command-line value.

Any field type declared in a struct that derives FromArgs must implement this trait. Argp implements it for:

• all built-in number types
• bool
• char
• String
• std::ffi::OsString
• std::path::PathBuf
• std::net::IpAddr and its variants
• std::net::SocketAddr and its variants

Custom types should implement this trait directly.

Required Methods

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

Construct the type from a command-line 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.

Implementations on Foreign Types

impl FromArgValue for IpAddr

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

impl FromArgValue for SocketAddr

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

impl FromArgValue for bool

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

impl FromArgValue for char

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

impl FromArgValue for f32

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

impl FromArgValue for f64

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

impl FromArgValue for i8

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

impl FromArgValue for i16

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

impl FromArgValue for i32

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

impl FromArgValue for i64

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

impl FromArgValue for i128

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

impl FromArgValue for isize

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

impl FromArgValue for u8

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

impl FromArgValue for u16

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

impl FromArgValue for u32

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

impl FromArgValue for u64

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

impl FromArgValue for u128

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

impl FromArgValue for usize

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

impl FromArgValue for String

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

impl FromArgValue for Ipv4Addr

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

impl FromArgValue for Ipv6Addr

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

impl FromArgValue for SocketAddrV4

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

impl FromArgValue for SocketAddrV6

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

impl FromArgValue for OsString

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

impl FromArgValue for PathBuf

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

Implementors