37 lines
971 B
Common Lisp
37 lines
971 B
Common Lisp
//! The Result type, indicating a fallible operation.
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use super::preamble::*;
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pub enum Result<T, E> {
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Ok(T),
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Err(E),
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}
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impl<T, E> Result<T, E> {
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// pub fn is_ok(self: &Self) -> bool {
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// match *self {
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// Ok(_) => true,
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// Err(_) => false,
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// }
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// }
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// pub fn is_err(self: &Self) -> bool {
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// match *self {
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// Ok(_) => false,
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// Err(_) => true,
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// }
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// }
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// /// Maps the value inside the Result::Ok, leaving errors alone.
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// pub fn map<U>(self: &Self, f: fn(T) -> U) -> Result<U, E> {
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// match *self {
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// Ok(t) => Ok(f(t)),
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// Err(e) => Err(e),
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// }
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// }
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// /// Maps the value inside the Result::Err, leaving values alone.
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// pub fn map_err<F>(self: &Self, f: fn(E) -> F) -> Result<T, F> {
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// match *self {
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// Ok(t) => Ok(t),
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// Err(e) => Err(f(e)),
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// }
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// }
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}
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