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Mar 11, 2024
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update rustc-driver-interacting-with-the-ast.md #1930

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Tbkhi Mar 10, 2024
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Update src/rustc-driver-interacting-with-the-ast.md
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8 changes: 6 additions & 2 deletions src/rustc-driver-interacting-with-the-ast.md
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# Example: Type checking through `rustc_interface`

`rustc_interface` allows you to interact with Rust code at various stages of compilation.
The [`rustc_interface`] allows you to interact with Rust code at various stages of compilation.

## Getting the type of an expression

To get the type of an expression, use the `global_ctxt` to get a `TyCtxt`.
To get the type of an expression, use the [`global_ctxt`] query to [get] a [`TyCtxt`].
The following was tested with <!-- date-check: jan 2024 --> `nightly-2024-01-19`:

```rust
{{#include ../examples/rustc-driver-interacting-with-the-ast.rs}}
```

[`rustc_interface`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_interface
[get]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/context/struct.GlobalCtxt.html#method.enter
[`TyCtxt`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/context/struct.TyCtxt.html