Crate pushgen

Push-style design pattern for processing of ranges and data-streams.

This is a Rust-based approach to the design pattern described by transrangers. While the discussion linked targets C++, the same basic principle of pull-based iterators applies to Rust as well (with some modifications since Rust doesn’t have a concept of an end iterator like C++ does).

Example

for item in data.iter().filter(|x| *x % 2 == 0).map(|x| x * 3) {
    process(item);
}

can be rewritten as

use pushgen::{SliceGenerator, GeneratorExt};
// Assume data is a slice
SliceGenerator::new(&data).filter(|x| *x % 2 == 0).map(|x| x * 3).for_each(process);

Performance

I make no performance-claims, however there are some benchmarked cases where the push-based approach wins over the iterator approach, but I have made no attempts to analyze this in any depth.

Modules

structs

Generator adaptor implementations. See GeneratorExt for more info.

Structs

SliceGenerator

A generator that generates values from a slice.

Enums

GeneratorResult

The result of generator runs.

ValueResult

Value-consumption result.

Traits

Generator

Trait for generating values into a closure.

GeneratorExt

Provides extension-methods for all generators.