comptime append strings to buffer

comptimeStr.zig

const std = @import("std");
const io = std.io;

//try stdout.print("All your base belong to use!\n", .{});
pub fn main() !void {
    comptime var names = [_]u8{0} ** 5000;
    comptime var name_offsets = [_]u64{0} ** 100; // no comptime writing to uninitialized values
    comptime var offset: usize = 0;
    comptime var index_offsets = 0;
    name_offsets[index_offsets] = offset;
    index_offsets += 1;

    const s1 = "test123";
    comptime {
        for (s1) |char, index| {
            names[offset + index] = char;
        }
    }
    offset += s1.len; // usize
    name_offsets[index_offsets] = offset;
    index_offsets += 1;

    const s2 = "456";
    comptime {
        for (s2) |char, index| {
            names[offset + index] = char;
        }
    }
    offset += s2.len; // usize
    name_offsets[index_offsets] = offset;
    index_offsets += 1;

    // print stuff
    const stdout = io.getStdOut().writer();
    var index: u16 = 0;
    while (index < index_offsets) : (index += 1) {
        try stdout.print("{d}\n", .{name_offsets[index]});
    }
    index = 0;
    std.debug.assert(index_offsets > 0);
    while (index < index_offsets - 1) : (index += 1) {
        try stdout.print("{s}\n", .{names[name_offsets[index]..name_offsets[index + 1]]});
    }
}