fix zig breakage

build.zig

@@ -17,19 +17,19 @@ pub fn build(b: *std.Build) void {
     _ = b.addModule(
         "datetime",
         .{
-            .source_file = .{
-                .path = "src/main.zig",
-            },
-        },
-    );
-
-    const lib = b.addStaticLibrary(.{
-        .name = "datetime",
             .root_source_file = .{ .path = "src/main.zig" },
             .target = target,
             .optimize = optimize,
-    });
+        },
-    b.installArtifact(lib);
+    );
+
+    // const lib = b.addStaticLibrary(.{
+    //     .name = "datetime",
+    //     .root_source_file = .{ .path = "src/main.zig" },
+    //     .target = target,
+    //     .optimize = optimize,
+    // });
+    // b.installArtifact(lib);
 
     const main_tests = b.addTest(.{
         .root_source_file = .{ .path = "src/main.zig" },

src/main.zig

@@ -1452,9 +1452,8 @@ test "asDateTime" {
 pub fn isLeap(year: Year) bool {
     // taken from https://github.com/ziglang/zig/pull/18451
 
-    // In the western Gregorian Calendar leap a year is
+    // In the western Gregorian Calendar leap a year is a multiple of 4,
-    // a multiple of 4, excluding multiples of 100, and
+    // excluding multiples of 100, and adding multiples of 400. In code:
-    // adding multiples of 400. In code:
     //
     // if (@mod(year, 4) != 0)
     //     return false;
@@ -1462,14 +1461,12 @@ pub fn isLeap(year: Year) bool {
     //     return true;
     // return (0 == @mod(year, 400));
 
-    // The following is equivalent to the above
+    // The following is equivalent to the above but uses bitwise operations
-    // but uses bitwise operations when testing
+    // when testing for divisibility, masking with 3 as test for multiples of 4
-    // for divisibility, masking with 3 as test
+    // and with 15 as a test for multiples of 16. Multiples of 16 and 100 are,
-    // for multiples of 4 and with 15 as a test
+    // conveniently, multiples of 400.
-    // for multiples of 16. Multiples of 16 and
-    // 100 are, conveniently, multiples of 400.
 
-    const mask: Year = switch (year % 100) {
+    const mask: Year = switch (@mod(year, 100)) {
         0 => 0b1111,
         else => 0b11,
     };