Rename `librustc` to `librustc_middle` #70536

Centril · 2020-03-29T15:10:02Z

Here we rename librustc to librustc_middle.

This crate is not nearly as large or central as it was previously and so it doesn't make much sense to give it such a central name as librustc ("the entry point to the compiler"). Moreover, there is already a rustc crate which is has the actual fn main of rustc, so having librustc is confusing relative to that.

r? @eddyb

eddyb · 2020-03-29T15:13:34Z

src/libcore/clone.rs

-/// are implemented in `SelectionContext::copy_clone_conditions()` in librustc.
+/// are implemented in `SelectionContext::copy_clone_conditions()` in librustc_middle.


Is this accurate? Some stuff has been moved out into separate crates.

Filed #70537 for checking followups.

eddyb · 2020-03-29T15:14:52Z

src/libcore/raw.rs

-//! Their definition should always match the ABI defined in `rustc::back::abi`.
+//! Their definition should always match the ABI defined in `rustc_target::abi`.


rustc_middle::ty::layout (which IMO should be rustc_middle::ty::abi or rustc_middle::abi but I've never gotten around to it)

eddyb · 2020-03-29T15:15:55Z

src/libstd/alloc.rs

-    // for symbol names src/librustc/middle/allocator.rs
+    // for symbol names src/librustc_middle/middle/allocator.rs


Is that file still there? But also I'm suspicious of rustc_middle::middle existing, in general.

eddyb · 2020-03-29T16:00:56Z

src/librustc_infer/infer/lexical_region_resolve/graphviz.rs

-//! `rustc::middle::typeck::infer::region_constraints`, generating a
+//! `rustc_middle::middle::typeck::infer::region_constraints`, generating a


Does this module even exist anymore, it looks off.

Yeah I don't think it does.

src/librustc_middle/lib.rs

eddyb · 2020-03-29T16:09:14Z

src/librustc_mir/borrow_check/region_infer/mod.rs

-/// `InferCtxt::type_must_outlive` in `rustc::infer::outlives`.
+/// `InferCtxt::type_must_outlive` in `rustc_middle::infer::outlives`.


Is that still there, wasn't InferCtxt moved?

Was moved to rustc_infer::infer::InferCtxt says rustdoc nightly docs.

eddyb · 2020-03-29T16:10:01Z

src/librustc_mir/borrow_check/type_check/mod.rs

-    /// **Any `rustc::infer` operations that might generate region
+    /// **Any `rustc_middle::infer` operations that might generate region


Again, I'm not sure infer is really there anymore.

rustc_middle::infer exists, but it's only 3 small modules.

eddyb · 2020-03-29T16:16:48Z

src/librustc_passes/stability.rs

-        // compiling librustc crates themselves so we can leverage crates.io
+        // compiling librustc_middle crates themselves so we can leverage crates.io


NB: this said "librustc crates". It could now be "librustc_* crates" or just "rustc crates".

eddyb · 2020-03-29T16:19:23Z

src/librustc_session/filesearch.rs

-    // of the directory where librustc is located, rather than where the rustc
+    // of the directory where librustc_middle is located, rather than where the rustc


This should probably say librustc_driver, if it refers to the dynamic library (since it's the only one left).

eddyb · 2020-03-29T16:20:23Z

src/librustc_session/lint.rs

@@ -207,7 +207,7 @@ pub struct BufferedEarlyLint {
    /// The `NodeId` of the AST node that generated the lint.
    pub node_id: NodeId,

-    /// A lint Id that can be passed to `rustc::lint::Lint::from_parser_lint_id`.
+    /// A lint Id that can be passed to `rustc_session::lint::Lint::from_parser_lint_id`.


The two mentions of "passed" in this file should refer to the same thing, no?

eddyb · 2020-03-29T16:20:47Z

src/librustc_session/lint.rs

@@ -195,7 +195,7 @@ pub enum BuiltinLintDiagnostics {
 }

 /// Lints that are buffered up early on in the `Session` before the
-/// `LintLevels` is calculated. These are later passed to `librustc`.
+/// `LintLevels` is calculated. These are later passed to `librustc_middle`.


This is the other "passed to" (GH won't let me do multi-line comments on this diff).

eddyb · 2020-03-29T16:22:11Z

src/librustc_trait_selection/traits/project.rs

-                // `rustc::ty::instance::resolve_associated_item()`.
+                // `rustc_middle::ty::instance::resolve_associated_item()`.


I believe this was moved.

eddyb · 2020-03-29T16:24:15Z

src/librustc_traits/implied_outlives_bounds.rs

-//! Do not call this query directory. See [`rustc::traits::query::implied_outlives_bounds`].
+//! Do not call this query directory. See [`rustc_middle::traits::query::implied_outlives_bounds`].


Likely outdated.

eddyb · 2020-03-29T16:27:53Z

src/librustc_ty/instance.rs

-            // `rustc::traits::project::assemble_candidates_from_impls()`.
+            // `rustc_middle::traits::project::assemble_candidates_from_impls()`.


Likely moved in the meanwhile.

src/test/ui-fulldeps/hash-stable-is-unstable.stderr

src/test/ui-fulldeps/pathless-extern-unstable.stderr

eddyb · 2020-03-29T16:40:29Z

cc @rust-lang/compiler I'm approving this now because it's easier to revert it than to land it.
If this isn't wanted, @Centril or me will do s/rustc_middle/rustc/ + ./x.py fmt to revert it.

(long-term, I'd like "type/trait-system is part of MIR", which is why the Mir->mir::Body rename was suggested, but I expect that would be far more controversial than rustc_middle existing)

@bors r+ p=123

bors · 2020-03-29T16:40:30Z

📌 Commit aaad8e77c07bad1db5aae2a40ed4d09e439c7ef5 has been approved by eddyb

bors · 2020-03-29T17:57:27Z

⌛ Testing commit aaad8e77c07bad1db5aae2a40ed4d09e439c7ef5 with merge 4119b5a1717ea70c38981c45b8ba9d4d8d986364...

RalfJung · 2020-03-30T08:44:00Z

So now we have rustc_middle::middle? ;-)

Centril · 2020-03-30T08:44:59Z

Yep, and rustc_ast::ast and rustc_hir::hir 🙃 😅

rustup rust-lang/rust#70536 changelog: none

Changes: ```` rustup rust-lang#70536 Rustup to rust-lang#70449 readme: move "how to run single lint" instructions to "Allowing/denying lints" section. git attribute macros not allowed in submodules Deprecate REPLACE_CONSTS lint Bump itertools ```` Fixes rust-lang#70554

submodules: update clippy from 70b93aa to e170c84 Changes: ```` rustup rust-lang#70536 Rustup to rust-lang#70449 readme: move "how to run single lint" instructions to "Allowing/denying lints" section. git attribute macros not allowed in submodules Deprecate REPLACE_CONSTS lint Bump itertools ```` Fixes rust-lang#70554

"rustc" package was renamed to "rustc_middle" in rust-lang/rust#70536 (>=1.42.0)

5220: Fix stdlib detection when working with rust-lang/rust project r=vlad20012 a=ortem Our analysis is broken on the latest nightly rustc (1.42.0) because "rustc" package was renamed to "rustc_middle" in rust-lang/rust#70536 and now "rust-lang/rust" is not detected by the plugin. Co-authored-by: ortem <[email protected]>

Changes: ```` rustup rust-lang/rust#70536 Rustup to rust-lang/rust#70449 readme: move "how to run single lint" instructions to "Allowing/denying lints" section. git attribute macros not allowed in submodules Deprecate REPLACE_CONSTS lint Bump itertools ```` Fixes #70554

rust-highfive assigned eddyb Mar 29, 2020

eddyb reviewed Mar 29, 2020

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Centril mentioned this pull request Mar 29, 2020

Check accuracy of some references in docs to files in librustc(_middle) #70537

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Centril force-pushed the rustc-middle branch from 31b5a5a to aaad8e7 Compare March 29, 2020 16:37

eddyb approved these changes Mar 29, 2020

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This was referenced Mar 30, 2020

Add lint for never type regressions #68350

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Record lifetime constraints inside generator interior #68362

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Implement RFC 2396: #[target_feature] 1.1 #69274

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nnethercote mentioned this pull request Mar 30, 2020

The rustc_query_impl crate is too big, which hurts compile times for the compiler itself #65031

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matthiaskrgr added a commit to matthiaskrgr/rust-clippy that referenced this pull request Mar 30, 2020

rustup rust-lang/rust#70536

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LeSeulArtichaut mentioned this pull request Mar 30, 2020

Rename librustc to librustc_middle rust-lang/rustc-dev-guide#642

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bors added a commit to rust-lang/rust-clippy that referenced this pull request Mar 30, 2020

Auto merge of #5392 - matthiaskrgr:rustup_40, r=phansch

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rustup rust-lang/rust#70536 changelog: none

flip1995 mentioned this pull request Apr 4, 2020

Fix link to internal rustc documentation rust-lang/rust-forge#329

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artemmukhin added a commit to intellij-rust/intellij-rust that referenced this pull request Apr 10, 2020

Fix stdlib detection when working with rust-lang/rust project

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"rustc" package was renamed to "rustc_middle" in rust-lang/rust#70536 (>=1.42.0)

artemmukhin mentioned this pull request Apr 10, 2020

Fix stdlib detection when working with rust-lang/rust project intellij-rust/intellij-rust#5220

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Rename `librustc` to `librustc_middle` #70536

Rename `librustc` to `librustc_middle` #70536

Centril commented Mar 29, 2020

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RalfJung commented Mar 30, 2020

Centril commented Mar 30, 2020

		/// are implemented in `SelectionContext::copy_clone_conditions()` in librustc.
		/// are implemented in `SelectionContext::copy_clone_conditions()` in librustc_middle.

		//! Their definition should always match the ABI defined in `rustc::back::abi`.
		//! Their definition should always match the ABI defined in `rustc_target::abi`.

		// for symbol names src/librustc/middle/allocator.rs
		// for symbol names src/librustc_middle/middle/allocator.rs

		//! `rustc::middle::typeck::infer::region_constraints`, generating a
		//! `rustc_middle::middle::typeck::infer::region_constraints`, generating a

		/// `InferCtxt::type_must_outlive` in `rustc::infer::outlives`.
		/// `InferCtxt::type_must_outlive` in `rustc_middle::infer::outlives`.

		/// **Any `rustc::infer` operations that might generate region
		/// **Any `rustc_middle::infer` operations that might generate region

		// compiling librustc crates themselves so we can leverage crates.io
		// compiling librustc_middle crates themselves so we can leverage crates.io

		// of the directory where librustc is located, rather than where the rustc
		// of the directory where librustc_middle is located, rather than where the rustc

		// `rustc::ty::instance::resolve_associated_item()`.
		// `rustc_middle::ty::instance::resolve_associated_item()`.

		//! Do not call this query directory. See [`rustc::traits::query::implied_outlives_bounds`].
		//! Do not call this query directory. See [`rustc_middle::traits::query::implied_outlives_bounds`].

		// `rustc::traits::project::assemble_candidates_from_impls()`.
		// `rustc_middle::traits::project::assemble_candidates_from_impls()`.

Rename librustc to librustc_middle #70536

Rename librustc to librustc_middle #70536

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Centril commented Mar 29, 2020

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eddyb commented Mar 29, 2020

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RalfJung commented Mar 30, 2020

Centril commented Mar 30, 2020

Rename `librustc` to `librustc_middle` #70536

Rename `librustc` to `librustc_middle` #70536