2 releases (1 stable)
1.0.0 | Mar 16, 2023 |
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0.1.0 | Jan 21, 2022 |
#1386 in Rust patterns
5KB
tailsome
Blanket traits providing methods for turning anything into an Option
or Result
.
Inspired by tap::Pipe
, which provides
a pipe
method that allows the user to call any bare function in the middle of a method chain.
The most useful of these traits' methods is probably IntoResult::into_ok
. Instead of wrapping
a long method-chain expression in a call to Ok
, try tacking an .into_ok()
at the end. This can
be especially pleasing in functions that return a Result
and make judicious use of method
chains and the ?
operator.
use tailsome::IntoResult;
build_pipeline().unwrap();
fn build_pipeline() -> Result<Example, Error> {
Builder::new()
.set_option(42)
.try_set_option("some flag")?
.set_option("another option")
.build()
.into_ok()
}
struct Example;
struct Builder;
impl Builder {
fn new() -> Self { Self }
fn set_option<T>(self, t: T) -> Self { self }
fn try_set_option<T>(self, t: T) -> Result<Self, Error> { Ok(self) }
fn build(self) -> Example { Example }
}
#[derive(Debug)]
struct Error;