Awesome

maybeuninit

This is a userlevel implementation of the undefined keyword in Zig.<br> It is inspired by MaybeUninit in Rust.

Minimum supported Zig

master

Each day will be tested in CI whether this project still builds on Zig master.

Recent changes

• 0.6.1
  • Add withByte as initializer function.
  • Remove all use of inline, as the usage of inline was considered wrong.
• 0.6
  • Rename assume_init to assumeInit.
  • rename as_ptr and as_mut_ptr to asPtr and asMutPtr.
  • rename first_ptr and first_ptr_mut to firstPtr and firstPtrMut.
• 0.5.2
  • Only support Zig's Master branch.
• 0.5.1
  • Add a private constant uninit intializer, to get around https://github.com/ziglang/zig/issues/3994.
• 0.5
  • Do not call @memset in MaybeUninit(T).zeroed() if T has a size of 0.
• 0.4
  • Prevent MaybeUninit(noreturn) from being created. See https://github.com/ziglang/zig/issues/3603.
• 0.3
  • Change the return type of first_ptr_mut from *Self to *T.
  • Adds a test that calls first_ptr_mut on an empty slice.
• 0.2
  • Change the definition of MaybeUninit from packed union to extern union, due to packed union's setting the alignment always to 1.
• 0.1
  • Initial library setup.

Issues

At the point of writing, it is impossible to create an uninitialized MaybeUninit(T), and later initialize it at compiletime.<br> This is an issue of the compiler, which tracks the current active field of packed and extern unions when used at compiletime, while it shouldn't.<br> The issue is reported to the Zig compiler, and can be followed here.