https://github.com/hejsil/ziter

The missing iterators for Zig
https://github.com/hejsil/ziter

functional iterator iterator-library iterators zig zig-library zig-package

Last synced: 7 days ago
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The missing iterators for Zig

• Host: GitHub
• URL: https://github.com/hejsil/ziter
• Owner: Hejsil
• License: mit
• Created: 2020-11-04T18:10:36.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2024-09-13T12:42:50.000Z (4 months ago)
• Last Synced: 2025-01-08T04:26:59.744Z (14 days ago)
• Topics: functional, iterator, iterator-library, iterators, zig, zig-library, zig-package
• Language: Zig
• Homepage:
• Size: 127 KB
• Stars: 73
• Watchers: 4
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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README

        

# ziter

An iterator library for zig inspired by the iterators in the Rust standard libary.

```zig

const iter = @import("ziter");

const std = @import("std");

test "ascii" {

    const ascii_digits = iter.range(u8, 0, 255)

        .filter({}, iter.void_ctx(std.ascii.isDigit));

    const ascii_alpha = try iter.range(u8, 0, 255)

        .filter({}, iter.void_ctx(std.ascii.isAlphabetic))

        .collect_no_allocator(std.BoundedArray(u8, 255){});

    try iter.expectEqual(iter.deref("0123456789"), ascii_digits);

    try std.testing.expectEqualStrings(

        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",

        ascii_alpha.slice(),

    );

}

test "Fibonacci" {

    const fib = Fibonacci{};

    const fib_sum_first_5 = fib.take(5).sum(usize);

    const fib_first_alphabetic = fib.map({}, to_u8)

        .find({}, iter.void_ctx(std.ascii.isAlphabetic));

    try std.testing.expectEqual(@as(usize, 7), fib_sum_first_5);

    try std.testing.expectEqual(@as(?u8, 'Y'), fib_first_alphabetic);

}

pub const Fibonacci = struct {

    c: usize = 0,

    n: usize = 1,

    pub fn next(it: *@This()) ?usize {

        const curr = it.c;

        it.c = it.n;

        it.n = curr + it.n;

        return curr;

    }

    pub usingnamespace iter;

};

fn to_u8(_: void, item: usize) u8 {

    return @truncate(item);

}

```