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Update rustc-driver-getting-diagnostics.md #1931

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Mar 11, 2024
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Update rustc-driver-getting-diagnostics.md #1931

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11 changes: 8 additions & 3 deletions src/rustc-driver-getting-diagnostics.md
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@@ -1,14 +1,19 @@
# Example: Getting diagnostic through `rustc_interface`

`rustc_interface` allows you to intercept diagnostics that would otherwise be printed to stderr.
The [`rustc_interface`] allows you to intercept diagnostics that would
otherwise be printed to stderr.

## Getting diagnostics

To get diagnostics from the compiler,
configure `rustc_interface::Config` to output diagnostic to a buffer,
and run `TyCtxt.analysis`. The following was tested
configure [`rustc_interface::Config`] to output diagnostic to a buffer,
and run [`TyCtxt.analysis`]. The following was tested
with <!-- date-check: jan 2024 --> `nightly-2024-01-19`:

```rust
{{#include ../examples/rustc-driver-getting-diagnostics.rs}}
```

[`rustc_interface`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/index.html
[`rustc_interface::Config`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/interface/struct.Config.html
[`TyCtxt.analysis`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface/passes/fn.analysis.html