From c0f97df1cc288806c01398769a5b1d6e6a9f7883 Mon Sep 17 00:00:00 2001
From: Meghan <hello@nektro.net>
Date: Fri, 30 Apr 2021 21:47:47 -0700
Subject: [PATCH] std: add range(usize)

---
 lib/std/std.zig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/lib/std/std.zig b/lib/std/std.zig
index 940d1ab42eaa..9405fba43531 100644
--- a/lib/std/std.zig
+++ b/lib/std/std.zig
@@ -92,6 +92,18 @@ pub const x = @import("x.zig");
 pub const zig = @import("zig.zig");
 pub const start = @import("start.zig");
 
+/// Use this as a way to increment an index using a for loop. Works with both
+/// runtime and comptime integers.
+///
+/// ```zig
+/// for (range(10)) |_, i| {
+///   // 'i' will increment from 0 -> 9
+/// }
+/// ```
+pub fn range(len: usize) []const u0 {
+    return @as([*]u0, undefined)[0..len];
+}
+
 // This forces the start.zig file to be imported, and the comptime logic inside that
 // file decides whether to export any appropriate start symbols, and call main.
 comptime {