Crate iter_enum[−][src]
#[derive(Iterator, DoubleEndedIterator, ExactSizeIterator, FusedIterator, Extend)] for enums.
Examples
use iter_enum::*; #[derive(Iterator, DoubleEndedIterator, ExactSizeIterator, FusedIterator, Extend)] enum Either<A, B> { A(A), B(B), } fn foo(x: i32) -> impl Iterator<Item = i32> { if x > 0 { Either::A(0..=x) } else { Either::B(std::iter::empty()) } }
See auto_enums crate for how to automate patterns like this.
Supported traits
Iterator
- example | generated codeDoubleEndedIterator
- example | generated codeExactSizeIterator
- example | generated codeFusedIterator
- example | generated codeExtend
- example | generated codeParallelIterator
(requires"rayon"
feature) - example | generated codeIndexedParallelIterator
(requires"rayon"
feature) - example | generated codeParallelExtend
(requires"rayon"
feature) - example | generated code
Optional features
rayon
- Enable to use
#[derive(ParallelIterator, IndexedParallelIterator, ParallelExtend)]
.
- Enable to use
Derive Macros
DoubleEndedIterator | |
ExactSizeIterator | |
Extend | |
FusedIterator | |
IndexedParallelIterator | rayon |
Iterator | |
ParallelExtend | rayon |
ParallelIterator | rayon |