57 lines
1.1 KiB
Rust
57 lines
1.1 KiB
Rust
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#[cfg(any(feature = "number", feature = "bool"))]
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pub mod prim;
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#[cfg(any(feature = "number", feature = "bool"))]
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pub use prim::*;
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#[cfg(feature = "vec")]
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pub mod vec;
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#[cfg(feature = "vec")]
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pub use vec::*;
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use std::convert::{Infallible, TryFrom};
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/// Wrapper under String type.
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///
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/// When we read the environment variable, we automatically convert the value
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/// to EnvString and then convert it to your expected type.
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///
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#[derive(Debug, Default, PartialEq, Eq, Clone)]
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pub struct EString(String);
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impl<T> From<T> for EString
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where
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T: std::fmt::Display,
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{
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#[inline]
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fn from(val: T) -> Self {
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Self(val.to_string())
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}
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}
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impl std::ops::Deref for EString {
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type Target = String;
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#[inline]
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl TryFrom<EString> for String {
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type Error = Infallible;
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#[inline]
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fn try_from(s: EString) -> Result<Self, Self::Error> {
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Ok(s.0)
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}
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}
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impl TryFrom<EString> for &'static str {
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type Error = Infallible;
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#[inline]
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fn try_from(s: EString) -> Result<Self, Self::Error> {
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Ok(Box::leak(s.0.into_boxed_str()))
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}
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}
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