0b1e8690da
Fixes #16311 The actual cause of #16311 is the `start_is_zero` special case: ```zig const range_len = if (end_val == .none or start_is_zero) end_val else try parent_gz.addPlNode(.sub, input, Zir.Inst.Bin{ .lhs = end_val, .rhs = start_val, }); ``` It only happens if the range start is 0. In that case we would not perform any type checking. Only in the other cases coincidentally `.sub` performs type checking in Sema, but the errors are still rather poor: ``` $ zig test x.zig x.zig:9:15: error: invalid operands to binary expression: 'Pointer' and 'Pointer' for ("abc".."def") |val| { ~~~~~^~~~~~~ ``` Note how it's the same as if I use `-`: ``` x.zig:9:11: error: invalid operands to binary expression: 'Pointer' and 'Pointer' "abc" - "def"; ~~~~~~^~~~~~~ ``` Now after this PR, the errors are much clearer for both range start and end: ``` x.zig:9:10: error: expected type 'usize', found '*const [3:0]u8' for ("abc".."def") |val| { ^~~~~ ``` This is why I decided to use `.ty` instead of `.coerced_ty` for both range start and end rather than just perform type checking in that `end_val == .none or start_is_zero` case.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
- Introduction
- Download & Documentation
- Chapter 0 - Getting Started | ZigLearn.org
- Community
- Contributing
- Code of Conduct
- Frequently Asked Questions
- Community Projects
Installation
- download a pre-built binary
- install from a package manager
- build from source
- 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.