fix few typos in comments

compiler/rustc_ast/src/ast.rs

@@ -1345,7 +1345,7 @@ pub enum ExprKind {
     Field(P<Expr>, Ident),
     /// An indexing operation (e.g., `foo[2]`).
     Index(P<Expr>, P<Expr>),
-    /// A range (e.g., `1..2`, `1..`, `..2`, `1..=2`, `..=2`; and `..` in destructuring assingment).
+    /// A range (e.g., `1..2`, `1..`, `..2`, `1..=2`, `..=2`; and `..` in destructuring assignment).
     Range(Option<P<Expr>>, Option<P<Expr>>, RangeLimits),
     /// An underscore, used in destructuring assignment to ignore a value.
     Underscore,

compiler/rustc_ast/src/tokenstream.rs

@@ -301,7 +301,7 @@ impl AttrAnnotatedTokenStream {
 /// tokens.
 ///
 /// For example, `#[cfg(FALSE)] struct Foo {}` would
-/// have an `attrs` field contaiing the `#[cfg(FALSE)]` attr,
+/// have an `attrs` field containing the `#[cfg(FALSE)]` attr,
 /// and a `tokens` field storing the (unparesd) tokens `struct Foo {}`
 #[derive(Clone, Debug, Encodable, Decodable)]
 pub struct AttributesData {

compiler/rustc_errors/src/lib.rs

@@ -321,7 +321,7 @@ struct HandlerInner {
 
     /// This set contains the `DiagnosticId` of all emitted diagnostics to avoid
     /// emitting the same diagnostic with extended help (`--teach`) twice, which
-    /// would be uneccessary repetition.
+    /// would be unnecessary repetition.
     taught_diagnostics: FxHashSet<DiagnosticId>,
 
     /// Used to suggest rustc --explain <error code>

compiler/rustc_expand/src/mbe.rs

@@ -69,7 +69,7 @@ enum KleeneOp {
     ZeroOrMore,
     /// Kleene plus (`+`) for one or more repetitions
     OneOrMore,
-    /// Kleene optional (`?`) for zero or one reptitions
+    /// Kleene optional (`?`) for zero or one repetitions
     ZeroOrOne,
 }
 

compiler/rustc_expand/src/mbe/transcribe.rs

@@ -209,7 +209,7 @@ pub(super) fn transcribe<'a>(
                             }
                         } else {
                             // 0 is the initial counter (we have done 0 repretitions so far). `len`
-                            // is the total number of reptitions we should generate.
+                            // is the total number of repetitions we should generate.
                             repeats.push((0, len));
 
                             // The first time we encounter the sequence we push it to the stack. It
@@ -362,7 +362,7 @@ impl LockstepIterSize {
 /// appropriate meta-vars in `interpolations`.
 ///
 /// Note that if `repeats` does not match the exact correct depth of a meta-var,
-/// `lookup_cur_matched` will return `None`, which is why this still works even in the presnece of
+/// `lookup_cur_matched` will return `None`, which is why this still works even in the presence of
 /// multiple nested matcher sequences.
 fn lockstep_iter_size(
     tree: &mbe::TokenTree,

compiler/rustc_infer/src/infer/combine.rs

@@ -191,7 +191,7 @@ impl<'infcx, 'tcx> InferCtxt<'infcx, 'tcx> {
     ///
     /// This also tests if the given const `ct` contains an inference variable which was previously
     /// unioned with `target_vid`. If this is the case, inferring `target_vid` to `ct`
-    /// would result in an infinite type as we continously replace an inference variable
+    /// would result in an infinite type as we continuously replace an inference variable
     /// in `ct` with `ct` itself.
     ///
     /// This is especially important as unevaluated consts use their parents generics.

compiler/rustc_infer/src/infer/nll_relate/mod.rs

@@ -279,7 +279,7 @@ where
     /// Relate a type inference variable with a value type. This works
     /// by creating a "generalization" G of the value where all the
     /// lifetimes are replaced with fresh inference values. This
-    /// genearlization G becomes the value of the inference variable,
+    /// generalization G becomes the value of the inference variable,
     /// and is then related in turn to the value. So e.g. if you had
     /// `vid = ?0` and `value = &'a u32`, we might first instantiate
     /// `?0` to a type like `&'0 u32` where `'0` is a fresh variable,

compiler/rustc_lint/src/builtin.rs

@@ -3022,7 +3022,7 @@ impl<'tcx> LateLintPass<'tcx> for DerefNullPtr {
             false
         }
 
-        /// test if experssion is the literal `0`
+        /// test if expression is the literal `0`
         fn is_zero(expr: &hir::Expr<'_>) -> bool {
             match &expr.kind {
                 rustc_hir::ExprKind::Lit(ref lit) => {

compiler/rustc_lint_defs/src/builtin.rs

@@ -2483,7 +2483,7 @@ declare_lint! {
     ///
     /// On x86, `asm!` uses the intel assembly syntax by default. While this
     /// can be switched using assembler directives like `.att_syntax`, using the
-    /// `att_syntax` option is recomended instead because it will also properly
+    /// `att_syntax` option is recommended instead because it will also properly
     /// prefix register placeholders with `%` as required by AT&T syntax.
     pub BAD_ASM_STYLE,
     Warn,
@@ -2678,7 +2678,7 @@ declare_lint! {
     /// Statics with an uninhabited type can never be initialized, so they are impossible to define.
     /// However, this can be side-stepped with an `extern static`, leading to problems later in the
     /// compiler which assumes that there are no initialized uninhabited places (such as locals or
-    /// statics). This was accientally allowed, but is being phased out.
+    /// statics). This was accidentally allowed, but is being phased out.
     pub UNINHABITED_STATIC,
     Warn,
     "uninhabited static",

compiler/rustc_middle/src/mir/interpret/error.rs

@@ -45,7 +45,7 @@ static_assert_size!(InterpErrorInfo<'_>, 8);
 
 /// Packages the kind of error we got from the const code interpreter
 /// up with a Rust-level backtrace of where the error occurred.
-/// Thsese should always be constructed by calling `.into()` on
+/// These should always be constructed by calling `.into()` on
 /// a `InterpError`. In `rustc_mir::interpret`, we have `throw_err_*`
 /// macros for this.
 #[derive(Debug)]

compiler/rustc_middle/src/mir/mod.rs

@@ -1521,7 +1521,7 @@ pub enum StatementKind<'tcx> {
     /// Marks the start of a "coverage region", injected with '-Zinstrument-coverage'. A
     /// `Coverage` statement carries metadata about the coverage region, used to inject a coverage
     /// map into the binary. If `Coverage::kind` is a `Counter`, the statement also generates
-    /// executable code, to increment a counter varible at runtime, each time the code region is
+    /// executable code, to increment a counter variable at runtime, each time the code region is
     /// executed.
     Coverage(Box<Coverage>),
 

compiler/rustc_middle/src/query/mod.rs

@@ -1280,7 +1280,7 @@ rustc_queries! {
         desc { "testing if a region is late bound" }
     }
     /// For a given item (like a struct), gets the default lifetimes to be used
-    /// for each paramter if a trait object were to be passed for that parameter.
+    /// for each parameter if a trait object were to be passed for that parameter.
     /// For example, for `struct Foo<'a, T, U>`, this would be `['static, 'static]`.
     /// For `struct Foo<'a, T: 'a, U>`, this would instead be `['a, 'static]`.
     query object_lifetime_defaults_map(_: LocalDefId)

compiler/rustc_middle/src/ty/closure.rs

@@ -160,7 +160,7 @@ impl CapturedPlace<'tcx> {
         }
     }
 
-    /// Returns the `LocalDefId` of the closure that captureed this Place
+    /// Returns the `LocalDefId` of the closure that captured this Place
     pub fn get_closure_local_def_id(&self) -> LocalDefId {
         match self.place.base {
             HirPlaceBase::Upvar(upvar_id) => upvar_id.closure_expr_id,

compiler/rustc_mir/src/borrow_check/diagnostics/outlives_suggestion.rs

@@ -1,4 +1,4 @@
-//! Contains utilities for generating suggestions for borrowck errors related to unsatisified
+//! Contains utilities for generating suggestions for borrowck errors related to unsatisfied
 //! outlives constraints.
 
 use std::collections::BTreeMap;

compiler/rustc_mir/src/const_eval/machine.rs

@@ -53,7 +53,7 @@ impl<'mir, 'tcx> InterpCx<'mir, 'tcx, CompileTimeInterpreter<'mir, 'tcx>> {
 /// Extra machine state for CTFE, and the Machine instance
 pub struct CompileTimeInterpreter<'mir, 'tcx> {
     /// For now, the number of terminators that can be evaluated before we throw a resource
-    /// exhuastion error.
+    /// exhaustion error.
     ///
     /// Setting this to `0` disables the limit and allows the interpreter to run forever.
     pub steps_remaining: usize,

compiler/rustc_mir/src/dataflow/framework/mod.rs

@@ -510,7 +510,7 @@ impl EffectIndex {
         }
     }
 
-    /// Returns `true` if the effect at `self` should be applied eariler than the effect at `other`
+    /// Returns `true` if the effect at `self` should be applied earlier than the effect at `other`
     /// in forward order.
     fn precedes_in_forward_order(self, other: Self) -> bool {
         let ord = self

compiler/rustc_mir/src/interpret/operand.rs

@@ -225,7 +225,7 @@ impl<'tcx, Tag: Copy> ImmTy<'tcx, Tag> {
 }
 
 impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
-    /// Normalice `place.ptr` to a `Pointer` if this is a place and not a ZST.
+    /// Normalize `place.ptr` to a `Pointer` if this is a place and not a ZST.
     /// Can be helpful to avoid lots of `force_ptr` calls later, if this place is used a lot.
     #[inline]
     pub fn force_op_ptr(

compiler/rustc_mir/src/transform/check_consts/qualifs.rs

@@ -29,11 +29,11 @@ pub fn in_any_value_of_ty(
 /// Normally, we would determine what qualifications apply to each type and error when an illegal
 /// operation is performed on such a type. However, this was found to be too imprecise, especially
 /// in the presence of `enum`s. If only a single variant of an enum has a certain qualification, we
-/// needn't reject code unless it actually constructs and operates on the qualifed variant.
+/// needn't reject code unless it actually constructs and operates on the qualified variant.
 ///
 /// To accomplish this, const-checking and promotion use a value-based analysis (as opposed to a
 /// type-based one). Qualifications propagate structurally across variables: If a local (or a
-/// projection of a local) is assigned a qualifed value, that local itself becomes qualifed.
+/// projection of a local) is assigned a qualified value, that local itself becomes qualified.
 pub trait Qualif {
     /// The name of the file used to debug the dataflow analysis that computes this qualif.
     const ANALYSIS_NAME: &'static str;

compiler/rustc_mir/src/transform/coverage/debug.rs

@@ -816,7 +816,7 @@ fn bcb_to_string_sections(
     sections
 }
 
-/// Returns a simple string representation of a `TerminatorKind` variant, indenpendent of any
+/// Returns a simple string representation of a `TerminatorKind` variant, independent of any
 /// values it might hold.
 pub(super) fn term_type(kind: &TerminatorKind<'tcx>) -> &'static str {
     match kind {

compiler/rustc_mir/src/transform/coverage/tests.rs

@@ -17,7 +17,7 @@
 //! Also note, some basic features of `Span` also rely on the `Span`s own "session globals", which
 //! are unrelated to the `TyCtxt` global. Without initializing the `Span` session globals, some
 //! basic, coverage-specific features would be impossible to test, but thankfully initializing these
-//! globals is comparitively simpler. The easiest way is to wrap the test in a closure argument
+//! globals is comparatively simpler. The easiest way is to wrap the test in a closure argument
 //! to: `rustc_span::with_default_session_globals(|| { test_here(); })`.
 
 use super::counters;

compiler/rustc_mir/src/util/find_self_call.rs

@@ -3,7 +3,7 @@ use rustc_middle::ty::subst::SubstsRef;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::def_id::DefId;
 
-/// Checks if the specified `local` is used as the `self` prameter of a method call
+/// Checks if the specified `local` is used as the `self` parameter of a method call
 /// in the provided `BasicBlock`. If it is, then the `DefId` of the called method is
 /// returned.
 pub fn find_self_call<'tcx>(

compiler/rustc_mir_build/src/build/expr/as_place.rs

@@ -80,7 +80,7 @@ crate struct PlaceBuilder<'tcx> {
 /// The projections are truncated to represent a path that might be captured by a
 /// closure/generator. This implies the vector returned from this function doesn't contain
 /// ProjectionElems `Downcast`, `ConstantIndex`, `Index`, or `Subslice` because those will never be
-/// part of a path that is captued by a closure. We stop applying projections once we see the first
+/// part of a path that is captured by a closure. We stop applying projections once we see the first
 /// projection that isn't captured by a closure.
 fn convert_to_hir_projections_and_truncate_for_capture<'tcx>(
     mir_projections: &[PlaceElem<'tcx>],
@@ -578,7 +578,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
 
     /// Lower a captured upvar. Note we might not know the actual capture index,
     /// so we create a place starting from `PlaceBase::Upvar`, which will be resolved
-    /// once all projections that allow us to indentify a capture have been applied.
+    /// once all projections that allow us to identify a capture have been applied.
     fn lower_captured_upvar(
         &mut self,
         block: BasicBlock,

compiler/rustc_parse/src/parser/item.rs

@@ -1448,7 +1448,7 @@ impl<'a> Parser<'a> {
         Ok((ident, ItemKind::MacroDef(ast::MacroDef { body, macro_rules: false })))
     }
 
-    /// Is this unambiguously the start of a `macro_rules! foo` item defnition?
+    /// Is this unambiguously the start of a `macro_rules! foo` item definition?
     fn is_macro_rules_item(&mut self) -> bool {
         self.check_keyword(kw::MacroRules)
             && self.look_ahead(1, |t| *t == token::Not)

compiler/rustc_privacy/src/lib.rs

@@ -1114,7 +1114,7 @@ impl<'tcx> Visitor<'tcx> for NamePrivacyVisitor<'tcx> {
 
 ////////////////////////////////////////////////////////////////////////////////////////////
 /// Type privacy visitor, checks types for privacy and reports violations.
-/// Both explicitly written types and inferred types of expressions and patters are checked.
+/// Both explicitly written types and inferred types of expressions and patterns are checked.
 /// Checks are performed on "semantic" types regardless of names and their hygiene.
 ////////////////////////////////////////////////////////////////////////////////////////////
 

compiler/rustc_resolve/src/late/lifetimes.rs

@@ -245,7 +245,7 @@ enum Scope<'a> {
         opaque_type_parent: bool,
 
         /// True only if this `Binder` scope is from the quantifiers on a
-        /// `PolyTraitRef`. This is necessary for `assocated_type_bounds`, which
+        /// `PolyTraitRef`. This is necessary for `associated_type_bounds`, which
         /// requires binders of nested trait refs to be merged.
         from_poly_trait_ref: bool,
 
@@ -303,7 +303,7 @@ enum Scope<'a> {
     /// of. Other than that, if ask for bound vars for each, we expect
     /// `['a, 'b]`. If we *didn't* allow binders before `T`, then we would
     /// always introduce a binder scope at the inner trait ref. This is great,
-    /// becauase later on during type-checking, we will ask "what are the late
+    /// because later on during type-checking, we will ask "what are the late
     /// bound vars on this trait ref". However, because we allow bound vars on
     /// the bound itself, we have to have some way of keeping track of the fact
     /// that we actually want to store the late bound vars as being associated

compiler/rustc_span/src/hygiene.rs

@@ -748,7 +748,7 @@ pub struct ExpnData {
 
     /// Used to force two `ExpnData`s to have different `Fingerprint`s.
     /// Due to macro expansion, it's possible to end up with two `ExpnId`s
-    /// that have identical `ExpnData`s. This violates the constract of `HashStable`
+    /// that have identical `ExpnData`s. This violates the contract of `HashStable`
     /// - the two `ExpnId`s are not equal, but their `Fingerprint`s are equal
     /// (since the numerical `ExpnId` value is not considered by the `HashStable`
     /// implementation).

compiler/rustc_target/src/abi/call/mod.rs

@@ -73,8 +73,8 @@ mod attr_impl {
 }
 
 /// Sometimes an ABI requires small integers to be extended to a full or partial register. This enum
-/// defines if this extension should be zero-extension or sign-extension when necssary. When it is
-/// not necesary to extend the argument, this enum is ignored.
+/// defines if this extension should be zero-extension or sign-extension when necessary. When it is
+/// not necessary to extend the argument, this enum is ignored.
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
 pub enum ArgExtension {
     None,

compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs

@@ -1954,7 +1954,7 @@ pub enum ArgKind {
     Arg(String, String),
 
     /// An argument of tuple type. For a "found" argument, the span is
-    /// the locationo in the source of the pattern. For a "expected"
+    /// the location in the source of the pattern. For a "expected"
     /// argument, it will be None. The vector is a list of (name, ty)
     /// strings for the components of the tuple.
     Tuple(Option<Span>, Vec<(String, String)>),

compiler/rustc_trait_selection/src/traits/select/mod.rs

@@ -944,7 +944,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
     /// subobligations without taking in a 'parent' depth, causing the
     /// generated subobligations to have a `recursion_depth` of `0`.
     ///
-    /// To ensure that obligation_depth never decreasees, we force all subobligations
+    /// To ensure that obligation_depth never decreases, we force all subobligations
     /// to have at least the depth of the original obligation.
     fn add_depth<T: 'cx, I: Iterator<Item = &'cx mut Obligation<'tcx, T>>>(
         &self,

compiler/rustc_typeck/src/check/method/probe.rs

@@ -158,7 +158,7 @@ enum ProbeResult {
 
 /// When adjusting a receiver we often want to do one of
 ///
-/// - Add a `&` (or `&mut`), converting the recevier from `T` to `&T` (or `&mut T`)
+/// - Add a `&` (or `&mut`), converting the receiver from `T` to `&T` (or `&mut T`)
 /// - If the receiver has type `*mut T`, convert it to `*const T`
 ///
 /// This type tells us which one to do.

compiler/rustc_typeck/src/check/upvar.rs

@@ -1588,7 +1588,7 @@ fn migration_suggestion_for_2229(
 /// If both the CaptureKind and Expression are considered to be equivalent,
 /// then `CaptureInfo` A is preferred. This can be useful in cases where we want to priortize
 /// expressions reported back to the user as part of diagnostics based on which appears earlier
-/// in the closure. This can be acheived simply by calling
+/// in the closure. This can be achieved simply by calling
 /// `determine_capture_info(existing_info, current_info)`. This works out because the
 /// expressions that occur earlier in the closure body than the current expression are processed before.
 /// Consider the following example

compiler/rustc_typeck/src/expr_use_visitor.rs

@@ -671,7 +671,7 @@ impl<'a, 'tcx> ExprUseVisitor<'a, 'tcx> {
     /// In the following example the closures `c` only captures `p.x`` even though `incr`
     /// is a capture of the nested closure
     ///
-    /// ```rust,ignore(cannot-test-this-because-pseduo-code)
+    /// ```rust,ignore(cannot-test-this-because-pseudo-code)
     /// let p = ..;
     /// let c = || {
     ///    let incr = 10;
@@ -715,7 +715,7 @@ impl<'a, 'tcx> ExprUseVisitor<'a, 'tcx> {
                             // The only places we want to fake read before creating the parent closure are the ones that
                             // are not local to it/ defined by it.
                             //
-                            // ```rust,ignore(cannot-test-this-because-pseduo-code)
+                            // ```rust,ignore(cannot-test-this-because-pseudo-code)
                             // let v1 = (0, 1);
                             // let c = || { // fake reads: v1
                             //    let v2 = (0, 1);