Make non-local-def lint Allow by default

Author: wesleywiser

compiler/rustc_lint/src/non_local_def.rs

@@ -47,7 +47,7 @@ declare_lint! {
     /// All nested bodies (functions, enum discriminant, array length, consts) (expect for
     /// `const _: Ty = { ... }` in top-level module, which is still undecided) are checked.
     pub NON_LOCAL_DEFINITIONS,
-    Warn,
+    Allow,
     "checks for non-local definitions",
     report_in_external_macro
 }

tests/rustdoc-ui/doctest/non_local_defs.rs

@@ -5,6 +5,7 @@
 //@ normalize-stdout-test "finished in \d+\.\d+s" -> "finished in $$TIME"
 
 //! ```
+//! #![warn(non_local_definitions)]
 //! #[macro_export]
 //! macro_rules! a_macro { () => {} }
 //! ```

tests/rustdoc-ui/doctest/non_local_defs.stderr

@@ -1,5 +1,5 @@
 warning: non-local `macro_rules!` definition, they should be avoided as they go against expectation
-  --> $DIR/non_local_defs.rs:9:1
+  --> $DIR/non_local_defs.rs:10:1
    |
 LL | macro_rules! a_macro { () => {} }
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -8,7 +8,11 @@ LL | macro_rules! a_macro { () => {} }
    = note: a `macro_rules!` definition is non-local if it is nested inside an item and has a `#[macro_export]` attribute
    = note: one exception to the rule are anon-const (`const _: () = { ... }`) at top-level module
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
-   = note: `#[warn(non_local_definitions)]` on by default
+note: the lint level is defined here
+  --> $DIR/non_local_defs.rs:7:9
+   |
+LL | #![warn(non_local_definitions)]
+   |         ^^^^^^^^^^^^^^^^^^^^^
 
 warning: 1 warning emitted
 

tests/ui/lint/non-local-defs/cargo-update.rs

@@ -10,6 +10,8 @@
 // of the `cargo update` suggestion we assert it here.
 //@ error-pattern: `cargo update -p non_local_macro`
 
+#![warn(non_local_definitions)]
+
 extern crate non_local_macro;
 
 struct LocalStruct;

tests/ui/lint/non-local-defs/cargo-update.stderr

@@ -1,5 +1,5 @@
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/cargo-update.rs:17:1
+  --> $DIR/cargo-update.rs:19:1
    |
 LL | non_local_macro::non_local_impl!(LocalStruct);
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -9,7 +9,11 @@ LL | non_local_macro::non_local_impl!(LocalStruct);
    = note: one exception to the rule are anon-const (`const _: () = { ... }`) at top-level module and anon-const at the same nesting as the trait or type
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
    = note: the macro `non_local_macro::non_local_impl` may come from an old version of the `non_local_macro` crate, try updating your dependency with `cargo update -p non_local_macro`
-   = note: `#[warn(non_local_definitions)]` on by default
+note: the lint level is defined here
+  --> $DIR/cargo-update.rs:13:9
+   |
+LL | #![warn(non_local_definitions)]
+   |         ^^^^^^^^^^^^^^^^^^^^^
    = note: this warning originates in the macro `non_local_macro::non_local_impl` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 warning: 1 warning emitted

tests/ui/lint/non-local-defs/consts.rs

@@ -2,6 +2,8 @@
 //@ edition:2021
 //@ rustc-env:CARGO_CRATE_NAME=non_local_def
 
+#![warn(non_local_definitions)]
+
 struct Test;
 
 trait Uto {}

tests/ui/lint/non-local-defs/consts.stderr

@@ -1,5 +1,5 @@
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:13:5
+  --> $DIR/consts.rs:15:5
    |
 LL | const Z: () = {
    |       - help: use a const-anon item to suppress this lint: `_`
@@ -11,10 +11,14 @@ LL |     impl Uto for &Test {}
    = note: an `impl` definition is non-local if it is nested inside an item and may impact type checking outside of that item. This can be the case if neither the trait or the self type are at the same nesting level as the `impl`
    = note: one exception to the rule are anon-const (`const _: () = { ... }`) at top-level module and anon-const at the same nesting as the trait or type
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
-   = note: `#[warn(non_local_definitions)]` on by default
+note: the lint level is defined here
+  --> $DIR/consts.rs:5:9
+   |
+LL | #![warn(non_local_definitions)]
+   |         ^^^^^^^^^^^^^^^^^^^^^
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:24:5
+  --> $DIR/consts.rs:26:5
    |
 LL |     impl Uto2 for Test {}
    |     ^^^^^^^^^^^^^^^^^^^^^
@@ -25,7 +29,7 @@ LL |     impl Uto2 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:32:5
+  --> $DIR/consts.rs:34:5
    |
 LL |     impl Uto3 for Test {}
    |     ^^^^^^^^^^^^^^^^^^^^^
@@ -36,7 +40,7 @@ LL |     impl Uto3 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:43:5
+  --> $DIR/consts.rs:45:5
    |
 LL | /     impl Test {
 LL | |
@@ -50,7 +54,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:50:9
+  --> $DIR/consts.rs:52:9
    |
 LL | /         impl Test {
 LL | |
@@ -64,7 +68,7 @@ LL | |         }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:59:9
+  --> $DIR/consts.rs:61:9
    |
 LL | /         impl Test {
 LL | |
@@ -78,7 +82,7 @@ LL | |         }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:72:9
+  --> $DIR/consts.rs:74:9
    |
 LL |         impl Uto9 for Test {}
    |         ^^^^^^^^^^^^^^^^^^^^^
@@ -89,7 +93,7 @@ LL |         impl Uto9 for Test {}
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/consts.rs:79:9
+  --> $DIR/consts.rs:81:9
    |
 LL |         impl Uto10 for Test {}
    |         ^^^^^^^^^^^^^^^^^^^^^^

tests/ui/lint/non-local-defs/exhaustive-trait.rs

@@ -1,6 +1,8 @@
 //@ check-pass
 //@ edition:2021
 
+#![warn(non_local_definitions)]
+
 struct Dog;
 
 fn main() {

tests/ui/lint/non-local-defs/exhaustive-trait.stderr

@@ -1,5 +1,5 @@
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:7:5
+  --> $DIR/exhaustive-trait.rs:9:5
    |
 LL | /     impl PartialEq<()> for Dog {
 LL | |
@@ -13,10 +13,14 @@ LL | |     }
    = note: an `impl` definition is non-local if it is nested inside an item and may impact type checking outside of that item. This can be the case if neither the trait or the self type are at the same nesting level as the `impl`
    = note: one exception to the rule are anon-const (`const _: () = { ... }`) at top-level module and anon-const at the same nesting as the trait or type
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
-   = note: `#[warn(non_local_definitions)]` on by default
+note: the lint level is defined here
+  --> $DIR/exhaustive-trait.rs:4:9
+   |
+LL | #![warn(non_local_definitions)]
+   |         ^^^^^^^^^^^^^^^^^^^^^
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:14:5
+  --> $DIR/exhaustive-trait.rs:16:5
    |
 LL | /     impl PartialEq<()> for &Dog {
 LL | |
@@ -32,7 +36,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:21:5
+  --> $DIR/exhaustive-trait.rs:23:5
    |
 LL | /     impl PartialEq<Dog> for () {
 LL | |
@@ -48,7 +52,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:28:5
+  --> $DIR/exhaustive-trait.rs:30:5
    |
 LL | /     impl PartialEq<&Dog> for () {
 LL | |
@@ -64,7 +68,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:35:5
+  --> $DIR/exhaustive-trait.rs:37:5
    |
 LL | /     impl PartialEq<Dog> for &Dog {
 LL | |
@@ -80,7 +84,7 @@ LL | |     }
    = note: this lint may become deny-by-default in the edition 2024 and higher, see the tracking issue <https://github.com/rust-lang/rust/issues/120363>
 
 warning: non-local `impl` definition, they should be avoided as they go against expectation
-  --> $DIR/exhaustive-trait.rs:42:5
+  --> $DIR/exhaustive-trait.rs:44:5
    |
 LL | /     impl PartialEq<&Dog> for &Dog {
 LL | |

tests/ui/lint/non-local-defs/exhaustive.rs

@@ -1,6 +1,8 @@
 //@ check-pass
 //@ edition:2021
 
+#![warn(non_local_definitions)]
+
 use std::fmt::Display;
 
 trait Trait {}