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Remove support for compiler plugins. #116412

Merged
merged 2 commits into from
Nov 4, 2023
Merged

Remove support for compiler plugins. #116412

merged 2 commits into from
Nov 4, 2023

Commits on Nov 3, 2023

  1. Update rust-lang/book. 

    To 5b6c1ceaa62ecbd6caef08df39b33b3938e99deb, for this commit:

- Prepare for removal of compiler plugin support. (rust-lang/book#3764)
    @nnethercote
    nnethercote committed Nov 3, 2023
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  2. Remove support for compiler plugins. 

    They've been deprecated for four years.

This commit includes the following changes.
- It eliminates the `rustc_plugin_impl` crate.
- It changes the language used for lints in
  `compiler/rustc_driver_impl/src/lib.rs` and
  `compiler/rustc_lint/src/context.rs`. External lints are now called
  "loaded" lints, rather than "plugins" to avoid confusion with the old
  plugins. This only has a tiny effect on the output of `-W help`.
- E0457 and E0498 are no longer used.
- E0463 is narrowed, now only relating to unfound crates, not plugins.
- The `plugin` feature was moved from "active" to "removed".
- It removes the entire plugins chapter from the unstable book.
- It removes quite a few tests, mostly all of those in
  `tests/ui-fulldeps/plugin/`.

Closes rust-lang#29597.
    @nnethercote
    nnethercote committed Nov 3, 2023
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