Crate iter_enum

#[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 code
• DoubleEndedIterator - example | generated code
• ExactSizeIterator - example | generated code
• FusedIterator - example | generated code
• Extend - example | generated code
• ParallelIterator (requires "rayon" feature) - example | generated code
• IndexedParallelIterator (requires "rayon" feature) - example | generated code
• ParallelExtend (requires "rayon" feature) - example | generated code

Optional features

• rayon
  • Enable to use #[derive(ParallelIterator, IndexedParallelIterator, ParallelExtend)].

Derive Macros

DoubleEndedIterator
ExactSizeIterator
Extend
FusedIterator
IndexedParallelIterator	rayon
Iterator
ParallelExtend	rayon
ParallelIterator	rayon