9da3a058d8
The main purpose of this commit is to prepare to implement support for callconv(), align(), linksection(), and addrspace() annotations on generic functions where the provided expression depends on comptime parameters (making the function generic). It's a rather involved change, so this commit only makes the necessary changes to AstGen without regressing any behavior, and a follow-up commit can finish the task by making the enhancements to Sema. By my quick estimation, the new encoding for functions is a negligible improvement - along the lines of 0.005% fewer total ZIR bytes on average. Still, it's nice that this commit, while adding more data into ZIR, actually ends up reducing the storage size thanks to a slightly more sophisticated encoding. Zir.Inst.ExtendedFunc is renamed to Zir.Inst.FuncFancy to eliminate confusion about it being an extended instruction (it used to be but is no longer). The encoding for this instruction is completely reworked. The encoding for Zir.Inst.Func is also changed slightly - when the return type body length is 1, then only a Zir.Inst.Ref is provided; not a full body. linksection() and addrspace() are now communicated via func_fancy ZIR instruction rather than as part of the corresponding decl. This allows their expressions to observe comptime parameters.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
- Introduction
- Download & Documentation
- Chapter 0 - Getting Started | ZigLearn.org
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- Frequently Asked Questions
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- download a pre-built binary
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- bootstrap zig for any target
License
The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.
Zig is intended to be used to help end-users accomplish their goals. Zig should be used to empower end-users, never to exploit them financially, or to limit their freedom to interact with hardware or software in any way.
However, such problems are best solved with social norms, not with software licenses. Any attempt to complicate the software license of Zig would risk compromising the value Zig provides.
Therefore, Zig is available under the MIT (Expat) License, and comes with a humble request: use it to make software better serve the needs of end-users.
This project redistributes code from other projects, some of which have other licenses besides MIT. Such licenses are generally similar to the MIT license for practical purposes. See the subdirectories and files inside lib/ for more details.