Note: Zig types explained in Ziglings

November 24, 2022

I have been tinkering with Zig lately and to get a grasp on the language I have been using the excellent Ziglings quizes.

In Quiz #58 there is a great comment which lists the different types for Zig:

// We've absorbed a lot of information about the variations of types
// we can use in Zig. Roughly, in order we have:
//                          u8  single item
//                         *u8  single-item pointer
//                        []u8  slice (size known at runtime)
//                       [5]u8  array of 5 u8s
//                       [*]u8  many-item pointer (zero or more)
//                 enum {a, b}  set of unique values a and b
//                error {e, f}  set of unique error values e and f
//      struct {y: u8, z: i32}  group of values y and z
// union(enum) {a: u8, b: i32}  single value either u8 or i32
// Values of any of the above types can be assigned as "var" or "const"
// to allow or disallow changes (mutability) via the assigned name:
//     const a: u8 = 5; // immutable
//       var b: u8 = 5; //   mutable
// We can also make error unions or optional types from any of
// the above:
//     var a: E!u8 = 5; // can be u8 or error from set E
//     var b: ?u8 = 5;  // can be u8 or null
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