Trait FromEnvAuto 

pub trait FromEnvAuto: Sized {
    // Required method
    fn from_env_auto(prefix: &str, var_name: &str) -> Result<Self, FromEnvError>;
}

Auto-dispatch trait for un-attributed #[derive(FromEnv)] fields.

For types that implement FromEnv (nested structs), calls from_env_with_prefix. For leaf types listed in the built-in impls, reads the env var and parses via FromStr.

You should not need to implement this trait directly.

Required Methods

fn from_env_auto(prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FromEnvAuto for String

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for bool

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for f32

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for f64

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for i8

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for i16

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for i32

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for i64

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for i128

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for u8

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for u16

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for u32

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for u64

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

impl FromEnvAuto for u128

fn from_env_auto(_prefix: &str, var_name: &str) -> Result<Self, FromEnvError>

Implementors

impl<T: FromEnv> FromEnvAuto for T