RangeExtensions

Extensions for Range type that provide support for 'foreach' and additional IEnumerable-compatible features.

• Correctness is verified against standard IEnumerable<int> behavior.
• Performance is hand tuned to produce efficient native code with no allocations as long as RangeEnumerable isn't boxed into IEnumerable<int> (same applies to enumerator).

Features

Range enumeration

foreach (var i in 0..100) { Console.WriteLine(i); }

Reverse range enumeration

for (var i = 100 - 1; i >= 0; i--) { Console.WriteLine(i); } // Can be written as foreach (var i in 100..0) { Console.WriteLine(i); }

Collecting to array or list

var numbers = (0..100).ToArray();

Other IEnumerable APIs (some methods have bespoke implementations for performance)

var firstTen = (400...720).AsEnumerable().Take(10);

Performance