eda3eb1561
This implement trace "popping" for correctly handled errors within
`catch { ... }` and `else { ... }` blocks.
When breaking from these blocks with any non-error, we pop the error
trace frames corresponding to the operand. When breaking with an error,
we preserve the frames so that error traces "chain" together as usual.
```zig
fn foo(cond1: bool, cond2: bool) !void {
bar() catch {
if (cond1) {
// If baz() result is a non-error, pop the error trace frames from bar()
// If baz() result is an error, leave the bar() frames on the error trace
return baz();
} else if (cond2) {
// If we break/return an error, then leave the error frames from bar() on the error trace
return error.Foo;
}
};
// An error returned from here does not include bar()'s error frames in the trace
return error.Bar;
}
```
Notice that if foo() does not return an error it, it leaves no extra
frames on the error trace.
This is piece (1/3) of https://github.com/ziglang/zig/issues/1923#issuecomment-1218495574
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| .builds | ||
| .github | ||
| ci | ||
| cmake | ||
| deps | ||
| doc | ||
| lib | ||
| src | ||
| test | ||
| tools | ||
| .gitattributes | ||
| .gitignore | ||
| build.zig | ||
| CMakeLists.txt | ||
| LICENSE | ||
| README.md | ||
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.