22 lines
390 B
Rust
22 lines
390 B
Rust
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use std::{error, fmt};
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/// Error returned if the inner [`Service`] has not been set.
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///
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/// [`Service`]: crate::Service
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#[derive(Debug)]
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pub struct None(());
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impl None {
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pub(crate) fn new() -> None {
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None(())
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}
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}
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impl fmt::Display for None {
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fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
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write!(fmt, "None")
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}
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}
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impl error::Error for None {}
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