Commit 24f28753e6df3d0bea28afaccc02d0c9f50cd04f | zig

author	Gordon Cassie <gordoncassie@gmail.com> 2024-06-08 12:39:11-07:00
committer	GitHub <noreply@github.com> 2024-06-08 12:39:11-07:00
log	24f28753e6df3d0bea28afaccc02d0c9f50cd04f
tree	ca8d52351ff8ca58c4c71fb9a842fb9d80c95c75
parent	7cf6650663368a535ed7363721f2e3d49a2a6c92
signature	Signed by PGP key B5690EEEBB952194

Provide examples of various initializations.

3 files changed, 18 insertions(+), 2 deletions(-)

doc/langref/test_basic_slices.zig+10

...	@@ -42,6 +42,16 @@ test "basic slices" {	...	@@ -42,6 +42,16 @@ test "basic slices" {
42		42
43	// Note that `slice.ptr` does not invoke safety checking, while `&slice[0]`	43	// Note that `slice.ptr` does not invoke safety checking, while `&slice[0]`
44	// asserts that the slice has len > 0.	44	// asserts that the slice has len > 0.
		45
		46	// Empty slices can be created like this:
		47	const empty1 = &[0]u8{};
		48	// If the type is known you can use this short hand:
		49	const empty2: []u8 = &.{};
		50	try expect(empty1.len == 0);
		51	try expect(empty2.len == 0);
		52
		53	// A zero-length initialization can always be used to create an empty slice, even if the slice is mutable.
		54	// This is because the pointed-to data is zero bits long, so its immutability is irrelevant.
45	}	55	}
46		56
47	// test_safety=index out of bounds	57	// test_safety=index out of bounds

doc/langref/test_multidimensional_arrays.zig+4

 @@ -19,6 +19,10 @@ test "multidimensional arrays" {
             }
         }
     }
+    // initialize a multidimensional array to zeros
+    const all_zero: [4][4]f32 = .{.{0} ** 4} ** 4;
+    try expect(all_zero[0][0] == 0);
 }
 // test

doc/langref/test_union_method.zig+4-2

 @@ -18,11 +18,13 @@ const Variant = union(enum) {
 };
 test "union method" {
-    var v1 = Variant{ .int = 1 };
+    var v1: Variant = .{ .int = 1 };
-    var v2 = Variant{ .boolean = false };
+    var v2: Variant = .{ .boolean = false };
+    var v3: Variant = .none;
     try expect(v1.truthy());
     try expect(!v2.truthy());
+    try expect(!v3.truthy());
 }
 // test