rustHow to implement a generator trait in Rust?
Generator traits are a powerful tool for creating iterators in Rust. They allow for the creation of custom iterators that can be used to iterate over collections of data.
Example code
use std::iter::Generator;
struct MyGenerator {
// ...
}
impl Generator for MyGenerator {
type Yield = i32;
type Return = ();
fn resume(&mut self) -> GeneratorState<Self::Yield, Self::Return> {
// ...
}
}
The code above creates a custom generator trait called MyGenerator
. It implements the Generator
trait from the std::iter
module. The Yield
and Return
types are specified as i32
and ()
respectively. The resume
method is then implemented, which is responsible for yielding values from the generator.
Code explanation
use std::iter::Generator
: This imports theGenerator
trait from thestd::iter
module.struct MyGenerator
: This creates a custom generator struct.impl Generator for MyGenerator
: This implements theGenerator
trait for theMyGenerator
struct.type Yield = i32
andtype Return = ()
: These specify the types of values that the generator will yield and return respectively.fn resume(&mut self) -> GeneratorState<Self::Yield, Self::Return>
: This is the implementation of theresume
method, which is responsible for yielding values from the generator.
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