This release includes improves to string handling and parameter passing to both improve performance and simplify the way arguments are bound to API calls.

Notably, the "alloc" feature has been removed. This feature allowed string literals to be implicitly converted to null terminated strings required by some Windows APIs. While convenient, it was rather complicated and expensive at runtime. Instead, the explicit s! and w! macros are now provided to create null terminated UTF-8 and UTF-16 string literals at compile time.

This release does not include an update to the windows-sys crate, which remains stable and unchanged.

What's Changed

• Fix new Rust-1.62 lints by @MarijnS95 in https://github.com/microsoft/windows-rs/pull/1866
• Clean up formatting and indetation by @MarijnS95 in https://github.com/microsoft/windows-rs/pull/1865
• Support running on Linux/WSL targets by @MarijnS95 in https://github.com/microsoft/windows-rs/pull/1863
• Derive Eq and PartialEq for NTSTATUS by @kennykerr in https://github.com/microsoft/windows-rs/pull/1869
• Fix token formatting for derive macros by @kennykerr in https://github.com/microsoft/windows-rs/pull/1870
• Basic field and constant metadata generation by @kennykerr in https://github.com/microsoft/windows-rs/pull/1871
• Add link to metadata used to generate crate in main readme by @poliorcetics in https://github.com/microsoft/windows-rs/pull/1875
• Add tool_lib crate to hold some of the common support for the windows-rs tools by @kennykerr in https://github.com/microsoft/windows-rs/pull/1876
• Update win32 metadata to v24 by @kennykerr in https://github.com/microsoft/windows-rs/pull/1877
• Move all docs to central location by @kennykerr in https://github.com/microsoft/windows-rs/pull/1878
• Adjust license placement for GitHub auto-detection by @riverar in https://github.com/microsoft/windows-rs/pull/1879
• Remove old license files by @kennykerr in https://github.com/microsoft/windows-rs/pull/1880
• Borrowed by @rylev in https://github.com/microsoft/windows-rs/pull/1811
• Use prettyplease for development formatting by @rylev in https://github.com/microsoft/windows-rs/pull/1849
• Remove orphaned "alloc" feature by @kennykerr in https://github.com/microsoft/windows-rs/pull/1888
• Convertible input strings by @kennykerr in https://github.com/microsoft/windows-rs/pull/1889
• Add macros for creating null-terminated string literals by @kennykerr in https://github.com/microsoft/windows-rs/pull/1891
• Update samples to use string literal macros by @kennykerr in https://github.com/microsoft/windows-rs/pull/1894
• Use where clauses in codegen by @rylev in https://github.com/microsoft/windows-rs/pull/1893
• Improve string pointer types by @rylev in https://github.com/microsoft/windows-rs/pull/1897
• Small refactor by @rylev in https://github.com/microsoft/windows-rs/pull/1899
• Avoid including primitive types with convertible types by @kennykerr in https://github.com/microsoft/windows-rs/pull/1900
• Remove dead code by @rylev in https://github.com/microsoft/windows-rs/pull/1905
• Add display methods for string pointer types by @rylev in https://github.com/microsoft/windows-rs/pull/1904
• Avoid transmute for binding primitive argument types by @kennykerr in https://github.com/microsoft/windows-rs/pull/1907
• Avoid generating redundant doc comments for methods by @kennykerr in https://github.com/microsoft/windows-rs/pull/1908
• Infer ABI type for method result type by @kennykerr in https://github.com/microsoft/windows-rs/pull/1909
• Avoid transmute for direct return values where no translation occurs by @kennykerr in https://github.com/microsoft/windows-rs/pull/1911
• More accurate signature parameter parsing by @kennykerr in https://github.com/microsoft/windows-rs/pull/1913
• Reduce dependence on transmute for WinRT arrays by @kennykerr in https://github.com/microsoft/windows-rs/pull/1914
• Ensure that Display impl for HSTRING is infallible by @kennykerr in https://github.com/microsoft/windows-rs/pull/1915
• Fix new nightly warning about unused return value by @kennykerr in https://github.com/microsoft/windows-rs/pull/1917
• Use internal Decode helper in a few more places by @kennykerr in https://github.com/microsoft/windows-rs/pull/1918

New Contributors

• @poliorcetics made their first contribution in https://github.com/microsoft/windows-rs/pull/1875

Full Changelog: https://github.com/microsoft/windows-rs/compare/0.38.0...0.39.0