zig stack/heap

main.zig

const std = @import("std");

pub const KV = struct {
    key: []const u8,
    val: []const u8,

    pub fn init(key: []const u8, val: []const u8) KV {
        return KV{ .key = key, .val = val };
    }
};

pub fn main() !void {
    const kv = KV.init("this", "is on stack");

    var key = try std.heap.page_allocator.alloc(u8, 10);
    var val = try std.heap.page_allocator.alloc(u8, 10);

    const kv_2 = KV.init(key, val);
}

// pub const Hash = struct {
//     const Self = @This();

//     inner: [std.crypto.Blake2s256.digest_length]u8,

//     pub fn hash(data: []const u8) Self {
//         var result: Self = undefined;
//         std.crypto.Blake2s256.hash(data, &result.inner);
//         return result;
//     }
// };

// pub fn main() !void {
//     std.debug.print("{x} (size in bytes: {})\n", .{ Hash.hash("test123").inner, @sizeOf(Hash) });
// }