From 4f8933255778838a5f9a34cade2942e9aeae8415 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sat, 21 Sep 2024 17:24:13 -0700
Subject: [PATCH] add isSlice

---
 src/isSlice.zig | 27 +++++++++++++++++++++++++++
 src/lib.zig     |  1 +
 2 files changed, 28 insertions(+)
 create mode 100644 src/isSlice.zig

diff --git a/src/isSlice.zig b/src/isSlice.zig
new file mode 100644
index 0000000000000000000000000000000000000000..9922a78bd80b474aa69899ab118bf32f47d2ccac
--- /dev/null
+++ b/src/isSlice.zig
@@ -0,0 +1,27 @@
+const std = @import("std");
+const string = []const u8;
+const extras = @import("./lib.zig");
+
+pub fn isSlice(comptime T: type) bool {
+    if (comptime is(.Pointer)(T)) {
+        return @typeInfo(T).Pointer.size == .Slice;
+    }
+    return false;
+}
+fn is(comptime id: std.builtin.TypeId) fn (type) bool {
+    const Closure = struct {
+        pub fn trait(comptime T: type) bool {
+            return id == @typeInfo(T);
+        }
+    };
+    return Closure.trait;
+}
+
+test {
+    const array = [_]u8{0} ** 10;
+    var runtime_zero: usize = 0;
+    _ = &runtime_zero;
+    try std.testing.expect(isSlice(@TypeOf(array[runtime_zero..])));
+    try std.testing.expect(!isSlice(@TypeOf(array)));
+    try std.testing.expect(!isSlice(@TypeOf(&array[0])));
+}
diff --git a/src/lib.zig b/src/lib.zig
index 9e57dc4908b775a730868271bd86a3f3fb4f0d6b..19999a64f444a22a77bd5757c3ee7f24882c33fb 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -97,3 +97,4 @@ pub usingnamespace @import("./OneSmallerInt.zig");
 pub usingnamespace @import("./FlippedInt.zig");
 pub usingnamespace @import("./isZigString.zig");
 pub usingnamespace @import("./isIndexable.zig");
+pub usingnamespace @import("./isSlice.zig");
-- 
2.54.0