setup typos check in CI

.github/workflows/spellcheck.yml

@@ -0,0 +1,23 @@
+# This workflow runs spellcheck job
+
+name: Spellcheck
+on:
+  pull_request:
+    branches:
+      - "**"
+
+jobs:
+  spellcheck:
+    name: run spellchecker
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the source code
+        uses: actions/checkout@v4
+
+      - name: check typos
+        # sync version with src/tools/tidy/src/ext_tool_checks.rs
+        uses: crate-ci/[email protected]
+        with:
+          # sync target files with src/tools/tidy/src/ext_tool_checks.rs
+          files: ./compiler ./library ./src/bootstrap ./src/librustdoc
+          config: ./typos.toml

REUSE.toml

@@ -36,6 +36,7 @@ path = [
     "rustfmt.toml",
     "rust-bors.toml",
     "triagebot.toml",
+    "typos.toml",
     "x",
     "x.ps1",
     "x.py",

compiler/rustc_ast/src/ast.rs

@@ -1245,7 +1245,7 @@
         }
     }
 
-    /// Returns an expression with (when possible) *one* outter brace removed
+    /// Returns an expression with (when possible) *one* outter outter brace removed
     pub fn maybe_unwrap_block(&self) -> &Expr {
         if let ExprKind::Block(block, None) = &self.kind
             && let [stmt] = block.stmts.as_slice()

compiler/rustc_ast_lowering/src/lib.rs

@@ -885,7 +885,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             let ret = self.arena.alloc_from_iter(lowered_attrs);
 
             // this is possible if an item contained syntactical attribute,
-            // but none of them parse succesfully or all of them were ignored
+            // but none of them parse successfully or all of them were ignored
             // for not being built-in attributes at all. They could be remaining
             // unexpanded attributes used as markers in proc-macro derives for example.
             // This will have emitted some diagnostics for the misparse, but will then

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -74,7 +74,7 @@ pub(crate) trait AttributeParser: Default + 'static {
 pub(crate) trait SingleAttributeParser: 'static {
     const PATH: &'static [rustc_span::Symbol];
 
-    /// Caled when a duplicate attribute is found.
+    /// Called when a duplicate attribute is found.
     ///
     /// `first_span` is the span of the first occurrence of this attribute.
     // FIXME(jdonszelmann): default error

compiler/rustc_codegen_llvm/src/builder/autodiff.rs

@@ -241,7 +241,7 @@ fn generate_enzyme_call<'ll>(
         let call = builder.call(enzyme_ty, ad_fn, &args, None);
 
         // This part is a bit iffy. LLVM requires that a call to an inlineable function has some
-        // metadata attachted to it, but we just created this code oota. Given that the
+        // metadata attached to it, but we just created this code oota. Given that the
         // differentiated function already has partly confusing metadata, and given that this
         // affects nothing but the auttodiff IR, we take a shortcut and just steal metadata from the
         // dummy code which we inserted at a higher level.

compiler/rustc_codegen_llvm/src/llvm/enzyme_ffi.rs

@@ -25,7 +25,7 @@ unsafe extern "C" {
     pub(crate) fn LLVMDumpValue(V: &Value);
     pub(crate) fn LLVMGetFunctionCallConv(F: &Value) -> c_uint;
     pub(crate) fn LLVMGetReturnType(T: &Type) -> &Type;
-    pub(crate) fn LLVMGetParams(Fnc: &Value, parms: *mut &Value);
+    pub(crate) fn LLVMGetParams(Fnc: &Value, params: *mut &Value);
     pub(crate) fn LLVMGetNamedFunction(M: &Module, Name: *const c_char) -> Option<&Value>;
 }
 

compiler/rustc_codegen_llvm/src/va_arg.rs

@@ -365,7 +365,7 @@ fn emit_xtensa_va_arg<'ll, 'tcx>(
 
     // On big-endian, for values smaller than the slot size we'd have to align the read to the end
     // of the slot rather than the start. While the ISA and GCC support big-endian, all the Xtensa
-    // targets supported by rustc are litte-endian so don't worry about it.
+    // targets supported by rustc are little-endian so don't worry about it.
 
     // if from_regsave {
     //     unsafe { *regsave_value_ptr }

compiler/rustc_codegen_ssa/messages.ftl

@@ -313,7 +313,7 @@ codegen_ssa_thorin_missing_referenced_unit = unit {$unit} referenced by executab
 
 codegen_ssa_thorin_missing_required_section = input object missing required section `{$section}`
 
-codegen_ssa_thorin_mixed_input_encodings = input objects haved mixed encodings
+codegen_ssa_thorin_mixed_input_encodings = input objects have mixed encodings
 
 codegen_ssa_thorin_multiple_debug_info_section = multiple `.debug_info.dwo` sections
 

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -2777,7 +2777,7 @@ fn add_upstream_rust_crates(
 
     if sess.target.is_like_aix {
         // Unlike ELF linkers, AIX doesn't feature `DT_SONAME` to override
-        // the dependency name when outputing a shared library. Thus, `ld` will
+        // the dependency name when outputting a shared library. Thus, `ld` will
         // use the full path to shared libraries as the dependency if passed it
         // by default unless `noipath` is passed.
         // https://www.ibm.com/docs/en/aix/7.3?topic=l-ld-command.
@@ -3061,7 +3061,7 @@ fn add_apple_link_args(cmd: &mut dyn Linker, sess: &Session, flavor: LinkerFlavo
     // Supported architecture names can be found in the source:
     // https://github.com/apple-oss-distributions/ld64/blob/ld64-951.9/src/abstraction/MachOFileAbstraction.hpp#L578-L648
     //
-    // Intentially verbose to ensure that the list always matches correctly
+    // Intentionally verbose to ensure that the list always matches correctly
     // with the list in the source above.
     let ld64_arch = match llvm_arch {
         "armv7k" => "armv7k",
@@ -3129,7 +3129,7 @@ fn add_apple_link_args(cmd: &mut dyn Linker, sess: &Session, flavor: LinkerFlavo
         // We do not currently know the actual SDK version though, so we have a few options:
         // 1. Use the minimum version supported by rustc.
         // 2. Use the same as the deployment target.
-        // 3. Use an arbitary recent version.
+        // 3. Use an arbitrary recent version.
         // 4. Omit the version.
         //
         // The first option is too low / too conservative, and means that users will not get the

compiler/rustc_codegen_ssa/src/codegen_attrs.rs

@@ -378,7 +378,7 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                                 [sym::arm, sym::a32 | sym::t32]
                                     if !tcx.sess.target.has_thumb_interworking =>
                                 {
-                                    tcx.dcx().emit_err(errors::UnsuportedInstructionSet {
+                                    tcx.dcx().emit_err(errors::UnsupportedInstructionSet {
                                         span: attr.span(),
                                     });
                                     None

compiler/rustc_codegen_ssa/src/errors.rs

@@ -150,7 +150,7 @@ pub(crate) struct NullOnExport {
 
 #[derive(Diagnostic)]
 #[diag(codegen_ssa_unsupported_instruction_set, code = E0779)]
-pub(crate) struct UnsuportedInstructionSet {
+pub(crate) struct UnsupportedInstructionSet {
     #[primary_span]
     pub span: Span,
 }

compiler/rustc_codegen_ssa/src/target_features.rs

@@ -171,7 +171,7 @@ pub(crate) fn provide(providers: &mut Providers) {
                                     // The stability in the entry is at least as good as the new one, just keep it.
                                 }
                                 _ => {
-                                    // Overwrite stabilite.
+                                    // Overwrite stability.
                                     occupied_entry.insert(stability);
                                 }
                             }

compiler/rustc_codegen_ssa/src/traits/builder.rs

@@ -89,7 +89,7 @@ pub trait BuilderMethods<'a, 'tcx>:
     //
     // This function is opt-in for back ends.
     //
-    // The default implementation calls `self.expect()` before emiting the branch
+    // The default implementation calls `self.expect()` before emitting the branch
     // by calling `self.cond_br()`
     fn cond_br_with_expect(
         &mut self,

compiler/rustc_const_eval/src/util/check_validity_requirement.rs

@@ -69,7 +69,7 @@ fn check_validity_requirement_strict<'tcx>(
     // require dereferenceability also require non-null, we don't actually get any false negatives
     // due to this.
     // The value we are validating is temporary and discarded at the end of this function, so
-    // there is no point in reseting provenance and padding.
+    // there is no point in resetting provenance and padding.
     cx.validate_operand(
         &allocated.into(),
         /*recursive*/ false,

compiler/rustc_data_structures/src/vec_cache.rs

@@ -257,7 +257,7 @@ unsafe impl<K: Idx, #[may_dangle] V, I> Drop for VecCache<K, V, I> {
         // we are also guaranteed to just need to deallocate any large arrays (not iterate over
         // contents).
         //
-        // Confirm no need to deallocate invidual entries. Note that `V: Copy` is asserted on
+        // Confirm no need to deallocate individual entries. Note that `V: Copy` is asserted on
         // insert/lookup but not necessarily construction, primarily to avoid annoyingly propagating
         // the bounds into struct definitions everywhere.
         assert!(!std::mem::needs_drop::<K>());

compiler/rustc_errors/src/markdown/parse.rs

@@ -352,7 +352,7 @@ fn normalize<'a>(MdStream(stream): MdStream<'a>, linkdefs: &mut Vec<MdTree<'a>>)
     let new_defs = stream.iter().filter(|tt| matches!(tt, MdTree::LinkDef { .. }));
     linkdefs.extend(new_defs.cloned());
 
-    // Run plaintest expansions on types that need it, call this function on nested types
+    // Run plaintext expansions on types that need it, call this function on nested types
     for item in stream {
         match item {
             MdTree::PlainText(txt) => expand_plaintext(txt, &mut new_stream, MdTree::PlainText),

compiler/rustc_feature/src/accepted.rs

@@ -372,7 +372,7 @@ declare_features! (
     (accepted, self_in_typedefs, "1.32.0", Some(49303)),
     /// Allows `Self` struct constructor (RFC 2302).
     (accepted, self_struct_ctor, "1.32.0", Some(51994)),
-    /// Shortern the tail expression lifetime
+    /// Shorten the tail expression lifetime
     (accepted, shorter_tail_lifetimes, "1.84.0", Some(123739)),
     /// Allows using subslice patterns, `[a, .., b]` and `[a, xs @ .., b]`.
     (accepted, slice_patterns, "1.42.0", Some(62254)),

compiler/rustc_hir/src/hir.rs

@@ -299,7 +299,7 @@ impl<'hir> ConstArg<'hir, AmbigArg> {
 }
 
 impl<'hir> ConstArg<'hir> {
-    /// Converts a `ConstArg` in an unambigous position to one in an ambiguous position. This is
+    /// Converts a `ConstArg` in an unambiguous position to one in an ambiguous position. This is
     /// fallible as the [`ConstArgKind::Infer`] variant is not present in ambiguous positions.
     ///
     /// Functions accepting ambiguous consts will not handle the [`ConstArgKind::Infer`] variant, if
@@ -368,7 +368,7 @@ pub enum GenericArg<'hir> {
     Lifetime(&'hir Lifetime),
     Type(&'hir Ty<'hir, AmbigArg>),
     Const(&'hir ConstArg<'hir, AmbigArg>),
-    /// Inference variables in [`GenericArg`] are always represnted by
+    /// Inference variables in [`GenericArg`] are always represented by
     /// `GenericArg::Infer` instead of the `Infer` variants on [`TyKind`] and
     /// [`ConstArgKind`] as it is not clear until hir ty lowering whether a
     /// `_` argument is a type or const argument.
@@ -3147,7 +3147,7 @@ impl<'hir> Ty<'hir, AmbigArg> {
 }
 
 impl<'hir> Ty<'hir> {
-    /// Converts a `Ty` in an unambigous position to one in an ambiguous position. This is
+    /// Converts a `Ty` in an unambiguous position to one in an ambiguous position. This is
     /// fallible as the [`TyKind::Infer`] variant is not present in ambiguous positions.
     ///
     /// Functions accepting ambiguous types will not handle the [`TyKind::Infer`] variant, if
@@ -4045,7 +4045,7 @@ impl fmt::Display for Constness {
     }
 }
 
-/// The actualy safety specified in syntax. We may treat
+/// The actually safety specified in syntax. We may treat
 /// its safety different within the type system to create a
 /// "sound by default" system that needs checking this enum
 /// explicitly to allow unsafe operations.

compiler/rustc_hir_analysis/messages.ftl

@@ -522,7 +522,7 @@ hir_analysis_trait_object_declared_with_no_traits =
     at least one trait is required for an object type
     .alias_span = this alias does not contain a trait
 
-hir_analysis_traits_with_defualt_impl = traits with a default impl, like `{$traits}`, cannot be implemented for {$problematic_kind} `{$self_ty}`
+hir_analysis_traits_with_default_impl = traits with a default impl, like `{$traits}`, cannot be implemented for {$problematic_kind} `{$self_ty}`
     .note = a trait object implements `{$traits}` if and only if `{$traits}` is one of the trait object's trait bounds
 
 hir_analysis_transparent_enum_variant = transparent enum needs exactly one variant, but has {$number}

compiler/rustc_hir_analysis/src/errors.rs

@@ -1327,7 +1327,7 @@ pub(crate) struct ImplForTyRequires {
 }
 
 #[derive(Diagnostic)]
-#[diag(hir_analysis_traits_with_defualt_impl, code = E0321)]
+#[diag(hir_analysis_traits_with_default_impl, code = E0321)]
 #[note]
 pub(crate) struct TraitsWithDefaultImpl<'a> {
     #[primary_span]

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -1059,7 +1059,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
             );
 
             // FIXME(#97583): Print associated item bindings properly (i.e., not as equality predicates!).
-            // FIXME: Turn this into a structured, translateable & more actionable suggestion.
+            // FIXME: Turn this into a structured, translatable & more actionable suggestion.
             let mut where_bounds = vec![];
             for bound in [bound, bound2].into_iter().chain(matching_candidates) {
                 let bound_id = bound.def_id();

compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs

@@ -112,7 +112,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         let mut deferred_repeat_expr_checks = self.deferred_repeat_expr_checks.borrow_mut();
         debug!("FnCtxt::check_repeat_exprs: {} deferred checks", deferred_repeat_expr_checks.len());
         for (element, element_ty, count) in deferred_repeat_expr_checks.drain(..) {
-            // We want to emit an error if the const is not structurally resolveable as otherwise
+            // We want to emit an error if the const is not structurally resolvable as otherwise
             // we can find up conservatively proving `Copy` which may infer the repeat expr count
             // to something that never required `Copy` in the first place.
             let count =
@@ -2399,7 +2399,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 }
 
                 if !mismatched_params.is_empty() {
-                    // For each mismatched paramter, create a two-way link to each matched parameter
+                    // For each mismatched parameter, create a two-way link to each matched parameter
                     // of the same type.
                     let mut dependants = IndexVec::<ExpectedIdx, _>::from_fn_n(
                         |_| SmallVec::<[u32; 4]>::new(),
@@ -2442,7 +2442,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                             spans.push_span_label(param.param.span(), "");
                         }
                     }
-                    // Highligh each parameter being depended on for a generic type.
+                    // Highlight each parameter being depended on for a generic type.
                     for ((&(_, param), deps), &(_, expected_ty)) in
                         params_with_generics.iter().zip(&dependants).zip(formal_and_expected_inputs)
                     {

compiler/rustc_hir_typeck/src/pat.rs

@@ -519,7 +519,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             // This is maximally flexible, allowing e.g., `Some(mut x) | &Some(mut x)`.
             // In that example, `Some(mut x)` results in `Peel` whereas `&Some(mut x)` in `Reset`.
             | PatKind::Or(_)
-            // Like or-patterns, guard patterns just propogate to their subpatterns.
+            // Like or-patterns, guard patterns just propagate to their subpatterns.
             | PatKind::Guard(..) => AdjustMode::Pass,
         }
     }

compiler/rustc_interface/src/passes.rs

@@ -850,7 +850,7 @@ pub fn create_and_enter_global_ctxt<T, F: for<'tcx> FnOnce(TyCtxt<'tcx>) -> T>(
                 feed.output_filenames(Arc::new(outputs));
 
                 let res = f(tcx);
-                // FIXME maybe run finish even when a fatal error occured? or at least tcx.alloc_self_profile_query_strings()?
+                // FIXME maybe run finish even when a fatal error occurred? or at least tcx.alloc_self_profile_query_strings()?
                 tcx.finish();
                 res
             },

compiler/rustc_lint/src/default_could_be_derived.rs

@@ -133,7 +133,7 @@ impl<'tcx> LateLintPass<'tcx> for DefaultCouldBeDerived {
             //     }
             // }
             // where `something()` would have to be a call or path.
-            // We have nothing meaninful to do with this.
+            // We have nothing meaningful to do with this.
             return;
         }
 

compiler/rustc_lint/src/if_let_rescope.rs

@@ -232,7 +232,7 @@ impl IfLetRescope {
                     }
                 }
             }
-            // At this point, any `if let` fragment in the cascade is definitely preceeded by `else`,
+            // At this point, any `if let` fragment in the cascade is definitely preceded by `else`,
             // so a opening bracket is mandatory before each `match`.
             add_bracket_to_match_head = true;
             if let Some(alt) = alt {

compiler/rustc_lint_defs/src/builtin.rs

@@ -1226,7 +1226,7 @@ declare_lint! {
     ///
     /// ### Explanation
     ///
-    /// A public `use` declaration should not be used to publicly re-export a
+    /// A public `use` declaration should not be used to publically re-export a
     /// private `extern crate`. `pub extern crate` should be used instead.
     ///
     /// This was historically allowed, but is not the intended behavior

compiler/rustc_macros/src/lib.rs

@@ -179,7 +179,7 @@ decl_derive! {
     [PrintAttribute] =>
     /// Derives `PrintAttribute` for `AttributeKind`.
     /// This macro is pretty specific to `rustc_attr_data_structures` and likely not that useful in
-    /// other places. It's deriving something close to `Debug` without printing some extraenous
+    /// other places. It's deriving something close to `Debug` without printing some extraneous
     /// things like spans.
     print_attribute::print_attribute
 }

compiler/rustc_middle/src/mir/mod.rs

@@ -254,7 +254,7 @@ pub struct Body<'tcx> {
     /// us to see the difference and forego optimization on the inlined promoted items.
     pub phase: MirPhase,
 
-    /// How many passses we have executed since starting the current phase. Used for debug output.
+    /// How many passes we have executed since starting the current phase. Used for debug output.
     pub pass_count: usize,
 
     pub source: MirSource<'tcx>,

compiler/rustc_middle/src/mir/syntax.rs

@@ -374,7 +374,7 @@ pub enum StatementKind<'tcx> {
     /// computing these locals.
     ///
     /// If the local is already allocated, calling `StorageLive` again will implicitly free the
-    /// local and then allocate fresh uninitilized memory. If a local is already deallocated,
+    /// local and then allocate fresh uninitialized memory. If a local is already deallocated,
     /// calling `StorageDead` again is a NOP.
     StorageLive(Local),
 

compiler/rustc_middle/src/query/mod.rs

@@ -264,7 +264,7 @@ rustc_queries! {
     /// Returns whether the type alias given by `DefId` is lazy.
     ///
     /// I.e., if the type alias expands / ought to expand to a [weak] [alias type]
-    /// instead of the underyling aliased type.
+    /// instead of the underlying aliased type.
     ///
     /// Relevant for features `lazy_type_alias` and `type_alias_impl_trait`.
     ///

compiler/rustc_middle/src/ty/significant_drop_order.rs

@@ -70,7 +70,7 @@ fn true_significant_drop_ty<'tcx>(
     }
 }
 
-/// Returns the list of types with a "potentially sigificant" that may be dropped
+/// Returns the list of types with a "potentially significant" that may be dropped
 /// by dropping a value of type `ty`.
 #[instrument(level = "trace", skip(tcx, typing_env))]
 pub fn extract_component_raw<'tcx>(

compiler/rustc_middle/src/ty/sty.rs

@@ -1777,7 +1777,7 @@ impl<'tcx> Ty<'tcx> {
     /// This is particularly useful for getting the type of the result of
     /// [`UnOp::PtrMetadata`](crate::mir::UnOp::PtrMetadata).
     ///
-    /// Panics if `self` is not dereferencable.
+    /// Panics if `self` is not dereferenceable.
     #[track_caller]
     pub fn pointee_metadata_ty_or_projection(self, tcx: TyCtxt<'tcx>) -> Ty<'tcx> {
         let Some(pointee_ty) = self.builtin_deref(true) else {