Fix some spelling mistakes

CMake/README.md

@@ -170,7 +170,7 @@ And finally install:
 cmake --build /temporary/build/abseil-cpp --target install
 ```
 
-# CMake Option Synposis
+# CMake Option Synopsis
 
 ## Enable Standard CMake Installation
 

UPGRADES.md

@@ -1,6 +1,6 @@
 # C++ Upgrade Tools
 
-Abseil may occassionally release API-breaking changes. As noted in our
+Abseil may occasionally release API-breaking changes. As noted in our
 [Compatibility Guidelines][compatibility-guide], we will aim to provide a tool
 to do the work of effecting such API-breaking changes, when absolutely
 necessary.

absl/base/attributes.h

@@ -331,7 +331,7 @@
 // This functionality is supported by GNU linker.
 #ifndef ABSL_ATTRIBUTE_SECTION_VARIABLE
 #ifdef _AIX
-// __attribute__((section(#name))) on AIX is achived by using the `.csect` psudo
+// __attribute__((section(#name))) on AIX is achieved by using the `.csect` psudo
 // op which includes an additional integer as part of its syntax indcating
 // alignment. If data fall under different alignments then you might get a
 // compilation error indicating a `Section type conflict`.

absl/base/internal/exception_safety_testing.h

@@ -946,7 +946,7 @@ class ExceptionSafetyTest {
  *   `std::unique_ptr<T> operator()() const` where T is the type being tested.
  *   It is used for reliably creating identical T instances to test on.
  *
- * - Operation: The operation object (passsed in via tester.WithOperation(...)
+ * - Operation: The operation object (passed in via tester.WithOperation(...)
  *   or tester.Test(...)) must be invocable with the signature
  *   `void operator()(T*) const` where T is the type being tested. It is used
  *   for performing steps on a T instance that may throw and that need to be

absl/base/internal/thread_identity_test.cc

@@ -95,7 +95,7 @@ TEST(ThreadIdentityTest, BasicIdentityWorksThreaded) {
 }
 
 TEST(ThreadIdentityTest, ReusedThreadIdentityMutexTest) {
-  // This test repeatly creates and joins a series of threads, each of
+  // This test repeatedly creates and joins a series of threads, each of
   // which acquires and releases shared Mutex locks. This verifies
   // Mutex operations work correctly under a reused
   // ThreadIdentity. Note that the most likely failure mode of this

absl/container/inlined_vector.h

@@ -745,7 +745,7 @@ class InlinedVector {
   // Erases the element at `pos`, returning an `iterator` pointing to where the
   // erased element was located.
   //
-  // NOTE: may return `end()`, which is not dereferencable.
+  // NOTE: may return `end()`, which is not dereferenceable.
   iterator erase(const_iterator pos) {
     ABSL_HARDENING_ASSERT(pos >= begin());
     ABSL_HARDENING_ASSERT(pos < end());
@@ -757,7 +757,7 @@ class InlinedVector {
   // range [`from`, `to`), returning an `iterator` pointing to where the first
   // erased element was located.
   //
-  // NOTE: may return `end()`, which is not dereferencable.
+  // NOTE: may return `end()`, which is not dereferenceable.
   iterator erase(const_iterator from, const_iterator to) {
     ABSL_HARDENING_ASSERT(from >= begin());
     ABSL_HARDENING_ASSERT(from <= to);

absl/container/inlined_vector_benchmark.cc

@@ -66,7 +66,7 @@ void BM_StdVectorFill(benchmark::State& state) {
 BENCHMARK(BM_StdVectorFill)->Range(1, 256);
 
 // The purpose of the next two benchmarks is to verify that
-// absl::InlinedVector is efficient when moving is more efficent than
+// absl::InlinedVector is efficient when moving is more efficient than
 // copying. To do so, we use strings that are larger than the short
 // string optimization.
 bool StringRepresentedInline(std::string s) {

absl/container/internal/common_policy_traits.h

@@ -87,7 +87,7 @@ struct common_policy_traits {
   }
 
  private:
-  // To rank the overloads below for overload resoltion. Rank0 is preferred.
+  // To rank the overloads below for overload resolution. Rank0 is preferred.
   struct Rank2 {};
   struct Rank1 : Rank2 {};
   struct Rank0 : Rank1 {};

absl/container/internal/container_memory.h

@@ -165,7 +165,7 @@ decltype(std::declval<F>()(std::declval<T>())) WithConstructed(
       std::forward<F>(f));
 }
 
-// Given arguments of an std::pair's consructor, PairArgs() returns a pair of
+// Given arguments of an std::pair's constructor, PairArgs() returns a pair of
 // tuples with references to the passed arguments. The tuples contain
 // constructor arguments for the first and the second elements of the pair.
 //

absl/container/internal/inlined_vector.h

@@ -1050,7 +1050,7 @@ template <typename NotMemcpyPolicy>
 void Storage<T, N, A>::SwapInlinedElements(NotMemcpyPolicy policy,
                                            Storage* other) {
   // Note: `destroy` needs to use pre-swap allocator while `construct` -
-  // post-swap allocator. Allocators will be swaped later on outside of
+  // post-swap allocator. Allocators will be swapped later on outside of
   // `SwapInlinedElements`.
   Storage* small_ptr = this;
   Storage* large_ptr = other;

absl/container/internal/layout_benchmark.cc

@@ -85,7 +85,7 @@ void BM_OffsetVariable(benchmark::State& state) {
   size_t m = 5;
   size_t k = 7;
   ABSL_RAW_CHECK(L::Partial(n, m, k).template Offset<3>() == Offset,
-                 "Inavlid offset");
+                 "Invalid offset");
   for (auto _ : state) {
     DoNotOptimize(n);
     DoNotOptimize(m);

absl/container/internal/raw_hash_set.h

@@ -115,7 +115,7 @@
 // starting with that index and extract potential candidates: occupied slots
 // with a control byte equal to `H2(hash(x))`. If we find an empty slot in the
 // group, we stop and return an error. Each candidate slot `y` is compared with
-// `x`; if `x == y`, we are done and return `&y`; otherwise we contine to the
+// `x`; if `x == y`, we are done and return `&y`; otherwise we continue to the
 // next probe index. Tombstones effectively behave like full slots that never
 // match the value we're looking for.
 //
@@ -2456,7 +2456,7 @@ class raw_hash_set {
   void rehash_and_grow_if_necessary() {
     const size_t cap = capacity();
     if (cap > Group::kWidth &&
-        // Do these calcuations in 64-bit to avoid overflow.
+        // Do these calculations in 64-bit to avoid overflow.
         size() * uint64_t{32} <= cap* uint64_t{25}) {
       // Squash DELETED without growing if there is enough capacity.
       //

absl/container/node_hash_set.h

@@ -334,7 +334,7 @@ class node_hash_set
   // for the past-the-end iterator, which is invalidated.
   //
   // `swap()` requires that the node hash set's hashing and key equivalence
-  // functions be Swappable, and are exchaged using unqualified calls to
+  // functions be Swappable, and are exchanged using unqualified calls to
   // non-member `swap()`. If the set's allocator has
   // `std::allocator_traits<allocator_type>::propagate_on_container_swap::value`
   // set to `true`, the allocators are also exchanged using an unqualified call

absl/crc/internal/crc.cc

@@ -438,7 +438,7 @@ CRC* CRC::Crc32c() {
 // This Concat implementation works for arbitrary polynomials.
 void CRC::Concat(uint32_t* px, uint32_t y, size_t ylen) {
   // https://en.wikipedia.org/wiki/Mathematics_of_cyclic_redundancy_checks
-  // The CRC of a message M is the remainder of polynomial divison modulo G,
+  // The CRC of a message M is the remainder of polynomial division modulo G,
   // where the coefficient arithmetic is performed modulo 2 (so +/- are XOR):
   //   R(x) = M(x) x**n (mod G)
   // (n is the degree of G)

absl/crc/internal/crc.h

@@ -53,7 +53,7 @@ class CRC {
   // points to an array of "length" zero bytes.
   virtual void ExtendByZeroes(uint32_t* crc, size_t length) const = 0;
 
-  // Inverse opration of ExtendByZeroes.  If `crc` is the CRC value of a string
+  // Inverse operation of ExtendByZeroes.  If `crc` is the CRC value of a string
   // ending in `length` zero bytes, this returns a CRC value of that string
   // with those zero bytes removed.
   virtual void UnextendByZeroes(uint32_t* crc, size_t length) const = 0;

absl/crc/internal/crc_cord_state.h

@@ -71,7 +71,7 @@ class CrcCordState {
   struct Rep {
     // `removed_prefix` is the crc and length of any prefix that has been
     // removed from the Cord (for example, by calling
-    // `CrcCord::RemovePrefix()`). To get the checkum of any prefix of the cord,
+    // `CrcCord::RemovePrefix()`). To get the checksum of any prefix of the cord,
     // this value must be subtracted from `prefix_crc`. See `Checksum()` for an
     // example.
     //

absl/crc/internal/crc_internal.h

@@ -111,7 +111,7 @@ class CRC32 : public CRCImpl {
   // Common implementation guts for ExtendByZeroes and UnextendByZeroes().
   //
   // zeroes_table is a table as returned by FillZeroesTable(), containing
-  // polynomials representing CRCs of strings-of-zeros of various lenghts,
+  // polynomials representing CRCs of strings-of-zeros of various lengths,
   // and which can be combined by polynomial multiplication.  poly_table is
   // a table of CRC byte extension values.  These tables are determined by
   // the generator polynomial.

absl/debugging/internal/stacktrace_x86-inl.inc

@@ -40,7 +40,7 @@ using absl::debugging_internal::AddressIsReadable;
 
 #if defined(__linux__) && defined(__i386__)
 // Count "push %reg" instructions in VDSO __kernel_vsyscall(),
-// preceeding "syscall" or "sysenter".
+// preceding "syscall" or "sysenter".
 // If __kernel_vsyscall uses frame pointer, answer 0.
 //
 // kMaxBytes tells how many instruction bytes of __kernel_vsyscall

absl/flags/internal/flag.h

@@ -121,7 +121,7 @@ inline void* Clone(FlagOpFn op, const void* obj) {
   flags_internal::CopyConstruct(op, obj, res);
   return res;
 }
-// Returns true if parsing of input text is successfull.
+// Returns true if parsing of input text is successful.
 inline bool Parse(FlagOpFn op, absl::string_view text, void* dst,
                   std::string* error) {
   return op(FlagOp::kParse, &text, dst, error) != nullptr;
@@ -139,12 +139,12 @@ inline size_t Sizeof(FlagOpFn op) {
   return static_cast<size_t>(reinterpret_cast<intptr_t>(
       op(FlagOp::kSizeof, nullptr, nullptr, nullptr)));
 }
-// Returns fast type id coresponding to the value type.
+// Returns fast type id corresponding to the value type.
 inline FlagFastTypeId FastTypeId(FlagOpFn op) {
   return reinterpret_cast<FlagFastTypeId>(
       op(FlagOp::kFastTypeId, nullptr, nullptr, nullptr));
 }
-// Returns fast type id coresponding to the value type.
+// Returns fast type id corresponding to the value type.
 inline const std::type_info* RuntimeTypeId(FlagOpFn op) {
   return reinterpret_cast<const std::type_info*>(
       op(FlagOp::kRuntimeTypeId, nullptr, nullptr, nullptr));

absl/functional/function_ref.h

@@ -66,11 +66,11 @@ class FunctionRef;
 
 // FunctionRef
 //
-// An `absl::FunctionRef` is a lightweight wrapper to any invokable object with
+// An `absl::FunctionRef` is a lightweight wrapper to any invocable object with
 // a compatible signature. Generally, an `absl::FunctionRef` should only be used
 // as an argument type and should be preferred as an argument over a const
 // reference to a `std::function`. `absl::FunctionRef` itself does not allocate,
-// although the wrapped invokable may.
+// although the wrapped invocable may.
 //
 // Example:
 //
@@ -98,7 +98,7 @@ class FunctionRef<R(Args...)> {
                               std::is_convertible<FR, R>::value>::type;
 
  public:
-  // Constructs a FunctionRef from any invokable type.
+  // Constructs a FunctionRef from any invocable type.
   template <typename F, typename = EnableIfCompatible<const F&>>
   // NOLINTNEXTLINE(runtime/explicit)
   FunctionRef(const F& f ABSL_ATTRIBUTE_LIFETIME_BOUND)

absl/functional/internal/any_invocable.h

@@ -488,7 +488,7 @@ class CoreImpl {
     // object.
     Clear();
 
-    // Perform the actual move/destory operation on the target function.
+    // Perform the actual move/destroy operation on the target function.
     other.manager_(FunctionToCall::relocate_from_to, &other.state_, &state_);
     manager_ = other.manager_;
     invoker_ = other.invoker_;

absl/hash/hash.h

@@ -42,7 +42,7 @@
 //
 // `absl::Hash` may also produce different values from different dynamically
 // loaded libraries. For this reason, `absl::Hash` values must never cross
-// boundries in dynamically loaded libraries (including when used in types like
+// boundaries in dynamically loaded libraries (including when used in types like
 // hash containers.)
 //
 // `absl::Hash` is intended to strongly mix input bits with a target of passing

absl/log/internal/log_format.cc

@@ -49,7 +49,7 @@ namespace {
 
 // This templated function avoids compiler warnings about tautological
 // comparisons when log_internal::Tid is unsigned. It can be replaced with a
-// constexpr if once the minimum C++ version Abseil suppports is C++17.
+// constexpr if once the minimum C++ version Abseil supports is C++17.
 template <typename T>
 inline std::enable_if_t<!std::is_signed<T>::value>
 PutLeadingWhitespace(T tid, char*& p) {

absl/log/internal/test_helpers.cc

@@ -68,7 +68,7 @@ bool DiedOfQFatal(int exit_status) {
 #endif
 
 // -----------------------------------------------------------------------------
-// Helper for Log inititalization in test
+// Helper for Log initialization in test
 // -----------------------------------------------------------------------------
 
 void LogTestEnvironment::SetUp() {

absl/log/internal/test_helpers.h

@@ -54,7 +54,7 @@ bool DiedOfQFatal(int exit_status);
 #endif
 
 // -----------------------------------------------------------------------------
-// Helper for Log inititalization in test
+// Helper for Log initialization in test
 // -----------------------------------------------------------------------------
 
 class LogTestEnvironment : public ::testing::Environment {

absl/random/generators_test.cc

@@ -49,7 +49,7 @@ void TestUniform(URBG* gen) {
   // (a, b) semantics, inferred types.
   absl::Uniform(absl::IntervalOpenOpen, *gen, 0, 1.0);  // Promoted to double
 
-  // Explict overriding of types.
+  // Explicit overriding of types.
   absl::Uniform<int>(*gen, 0, 100);
   absl::Uniform<int8_t>(*gen, 0, 100);
   absl::Uniform<int16_t>(*gen, 0, 100);

absl/random/internal/distribution_test_util.cc

@@ -213,7 +213,7 @@ double BetaIncompleteImpl(const double x, const double p, const double q,
   double result = 1.;
   int ns = static_cast<int>(q + xc * psq);
 
-  // Use the soper reduction forumla.
+  // Use the soper reduction formula.
   double rx = (ns == 0) ? x : x / xc;
   double temp = q - ai;
   for (;;) {
@@ -247,7 +247,7 @@ double BetaIncompleteImpl(const double x, const double p, const double q,
 // https://www.jstor.org/stable/2346798?read-now=1&seq=4#page_scan_tab_contents
 // https://www.jstor.org/stable/2346887?seq=1#page_scan_tab_contents
 //
-// XINBTA(p, q, beta, alhpa)
+// XINBTA(p, q, beta, alpha)
 //  p:     the value of the parameter p.
 //  q:     the value of the parameter q.
 //  beta:  the value of ln B(p, q)

absl/random/internal/randen_engine.h

@@ -142,7 +142,7 @@ class alignas(8) randen_engine {
       // The Randen paper suggests preferentially initializing even-numbered
       // 128-bit vectors of the randen state (there are 16 such vectors).
       // The seed data is merged into the state offset by 128-bits, which
-      // implies prefering seed bytes [16..31, ..., 208..223]. Since the
+      // implies preferring seed bytes [16..31, ..., 208..223]. Since the
       // buffer is 32-bit values, we swap the corresponding buffer positions in
       // 128-bit chunks.
       size_t dst = kBufferSize;

absl/strings/charconv.cc

@@ -203,7 +203,7 @@ struct FloatTraits<float> {
     if (mantissa > kMantissaMask) {
       // Normal value.
       // Adjust by 127 for the exponent representation bias, and an additional
-      // 23 due to the implied decimal point in the IEEE mantissa represenation.
+      // 23 due to the implied decimal point in the IEEE mantissa representation.
       flt += static_cast<uint32_t>(exponent + 127 + kTargetMantissaBits - 1)
              << 23;
       mantissa &= kMantissaMask;
@@ -462,7 +462,7 @@ uint64_t ShiftRightAndRound(uint128 value, int shift, bool input_exact,
     // the low bit of `value` is set.
     //
     // In inexact mode, the nonzero error means the actual value is greater
-    // than the halfway point and we must alway round up.
+    // than the halfway point and we must always round up.
     if ((value & 1) == 1 || !input_exact) {
       ++value;
     }

absl/strings/charconv.h

@@ -22,7 +22,7 @@
 namespace absl {
 ABSL_NAMESPACE_BEGIN
 
-// Workalike compatibilty version of std::chars_format from C++17.
+// Workalike compatibility version of std::chars_format from C++17.
 //
 // This is an bitfield enumerator which can be passed to absl::from_chars to
 // configure the string-to-float conversion.
@@ -48,7 +48,7 @@ struct from_chars_result {
   std::errc ec;
 };
 
-// Workalike compatibilty version of std::from_chars from C++17.  Currently
+// Workalike compatibility version of std::from_chars from C++17.  Currently
 // this only supports the `double` and `float` types.
 //
 // This interface incorporates the proposed resolutions for library issues

absl/strings/cord.cc

@@ -794,7 +794,7 @@ int CompareChunks(absl::string_view* lhs, absl::string_view* rhs,
 }
 
 // This overload set computes comparison results from memcmp result. This
-// interface is used inside GenericCompare below. Differet implementations
+// interface is used inside GenericCompare below. Different implementations
 // are specialized for int and bool. For int we clamp result to {-1, 0, 1}
 // set. For bool we just interested in "value == 0".
 template <typename ResultType>

absl/strings/cord.h

@@ -661,7 +661,7 @@ class Cord {
   class CharRange {
    public:
     // Fulfill minimum c++ container requirements [container.requirements]
-    // Theses (partial) container type definitions allow CharRange to be used
+    // These (partial) container type definitions allow CharRange to be used
     // in various utilities expecting a subset of [container.requirements].
     // For example, the below enables using `::testing::ElementsAre(...)`
     using value_type = char;

absl/strings/cord_test_helpers.h

@@ -51,7 +51,7 @@ enum class TestCordSize {
   // existing inputs rather than copying contents of the input.
   kMedium = cord_internal::kMaxFlatLength / 2 + 1,
 
-  // A string value large enough to cause it to be stored in mutliple flats.
+  // A string value large enough to cause it to be stored in multiple flats.
   kLarge = cord_internal::kMaxFlatLength * 4
 };
 

absl/strings/internal/charconv_bigint.h

@@ -92,7 +92,7 @@ class BigUnsigned {
   // numbers with this many decimal digits or fewer are representable by this
   // type.
   //
-  // Analagous to std::numeric_limits<BigUnsigned>::digits10.
+  // Analogous to std::numeric_limits<BigUnsigned>::digits10.
   static constexpr int Digits10() {
     // 9975007/1035508 is very slightly less than log10(2**32).
     return static_cast<uint64_t>(max_words) * 9975007 / 1035508;

absl/strings/internal/cord_rep_btree_test.cc

@@ -507,7 +507,7 @@ TEST_P(CordRepBtreeTest, AppendToTreeTwoDeep) {
   for (size_t i = max_cap * max_cap + 1; i < max_cap * max_cap * max_cap; ++i) {
     // Ref top level tree based on param.
     // Ref child node once every 16 iterations, and leaf node every 4
-    // iterrations which  which should not have an observable effect other than
+    // iterations which  which should not have an observable effect other than
     //  the node and/or the leaf below it being copied.
     refs.RefIf(shared(), tree);
     refs.RefIf(i % 16 == 0, tree->Edges().back());
@@ -568,7 +568,7 @@ TEST_P(CordRepBtreeTest, PrependToTreeTwoDeep) {
   for (size_t i = max_cap * max_cap + 1; i < max_cap * max_cap * max_cap; ++i) {
     // Ref top level tree based on param.
     // Ref child node once every 16 iterations, and leaf node every 4
-    // iterrations which  which should not have an observable effect other than
+    // iterations which  which should not have an observable effect other than
     //  the node and/or the leaf below it being copied.
     refs.RefIf(shared(), tree);
     refs.RefIf(i % 16 == 0, tree->Edges().back());