Export of internal Abseil changes.

--
f4bb8afa9376b4120f56f3beff7b07260da4a5c2 by CJ Johnson <johnsoncj@google.com>:

Add user to Github list

PiperOrigin-RevId: 209630262
GitOrigin-RevId: f4bb8afa9376b4120f56f3beff7b07260da4a5c2
Change-Id: I3fedf35011d805ee4a20b92e073b43523b47d15b

54 files changed, 302 insertions, 302 deletions

diff --git a/absl/base/attributes.h b/absl/base/attributes.h
index b1883b6d75..3662f0fe78 100644
--- a/absl/base/attributes.h
+++ b/absl/base/attributes.h
@@ -100,7 +100,7 @@
 // ABSL_PRINTF_ATTRIBUTE
 // ABSL_SCANF_ATTRIBUTE
 //
-// Tells the compiler to perform `printf` format std::string checking if the
+// Tells the compiler to perform `printf` format string checking if the
 // compiler supports it; see the 'format' attribute in
 // <http://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Function-Attributes.html>.
 //
diff --git a/absl/base/config.h b/absl/base/config.h
index 6890e313bf..035bd03f92 100644
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -199,7 +199,7 @@
 #define ABSL_HAVE_INTRINSIC_INT128 1
 #elif defined(__CUDACC__)
 // __CUDACC_VER__ is a full version number before CUDA 9, and is defined to a
-// std::string explaining that it has been removed starting with CUDA 9. We use
+// string explaining that it has been removed starting with CUDA 9. We use
 // nested #ifs because there is no short-circuiting in the preprocessor.
 // NOTE: `__CUDACC__` could be undefined while `__CUDACC_VER__` is defined.
 #if __CUDACC_VER__ >= 70000
diff --git a/absl/base/exception_safety_testing_test.cc b/absl/base/exception_safety_testing_test.cc
index 724c0ad547..c2922f33c6 100644
--- a/absl/base/exception_safety_testing_test.cc
+++ b/absl/base/exception_safety_testing_test.cc
@@ -179,7 +179,7 @@ TEST(ThrowingValueTest, ThrowingStreamOps) {
 }
 
 // Tests the operator<< of ThrowingValue by forcing ConstructorTracker to emit
-// a nonfatal failure that contains the std::string representation of the Thrower
+// a nonfatal failure that contains the string representation of the Thrower
 TEST(ThrowingValueTest, StreamOpsOutput) {
   using ::testing::TypeSpec;
   exceptions_internal::ConstructorTracker ct(exceptions_internal::countdown);
diff --git a/absl/base/internal/raw_logging.h b/absl/base/internal/raw_logging.h
index 67abfd3079..79a7bb9b2f 100644
--- a/absl/base/internal/raw_logging.h
+++ b/absl/base/internal/raw_logging.h
@@ -114,7 +114,7 @@ void SafeWriteToStderr(const char *s, size_t len);
 
 // compile-time function to get the "base" filename, that is, the part of
 // a filename after the last "/" or "\" path separator.  The search starts at
-// the end of the std::string; the second parameter is the length of the std::string.
+// the end of the string; the second parameter is the length of the string.
 constexpr const char* Basename(const char* fname, int offset) {
   return offset == 0 || fname[offset - 1] == '/' || fname[offset - 1] == '\\'
              ? fname + offset
diff --git a/absl/base/log_severity.h b/absl/base/log_severity.h
index e2931c34d1..5770d3629e 100644
--- a/absl/base/log_severity.h
+++ b/absl/base/log_severity.h
@@ -39,7 +39,7 @@ constexpr std::array<absl::LogSeverity, 4> LogSeverities() {
            absl::LogSeverity::kError, absl::LogSeverity::kFatal}};
 }
 
-// Returns the all-caps std::string representation (e.g. "INFO") of the specified
+// Returns the all-caps string representation (e.g. "INFO") of the specified
 // severity level if it is one of the normal levels and "UNKNOWN" otherwise.
 constexpr const char* LogSeverityName(absl::LogSeverity s) {
   return s == absl::LogSeverity::kInfo
diff --git a/absl/base/raw_logging_test.cc b/absl/base/raw_logging_test.cc
index ebbc5db906..b21cf65175 100644
--- a/absl/base/raw_logging_test.cc
+++ b/absl/base/raw_logging_test.cc
@@ -40,7 +40,7 @@ TEST(RawLoggingCompilationTest, PassingCheck) {
 }
 
 // Not all platforms support output from raw log, so we don't verify any
-// particular output for RAW check failures (expecting the empty std::string
+// particular output for RAW check failures (expecting the empty string
 // accomplishes this).  This test is primarily a compilation test, but we
 // are verifying process death when EXPECT_DEATH works for a platform.
 const char kExpectedDeathOutput[] = "";
diff --git a/absl/container/inlined_vector_benchmark.cc b/absl/container/inlined_vector_benchmark.cc
index 24f2174928..a3ad0f8ae4 100644
--- a/absl/container/inlined_vector_benchmark.cc
+++ b/absl/container/inlined_vector_benchmark.cc
@@ -66,7 +66,7 @@ BENCHMARK(BM_StdVectorFill)->Range(0, 1024);
 // The purpose of the next two benchmarks is to verify that
 // absl::InlinedVector is efficient when moving is more efficent than
 // copying. To do so, we use strings that are larger than the short
-// std::string optimization.
+// string optimization.
 bool StringRepresentedInline(std::string s) {
   const char* chars = s.data();
   std::string s1 = std::move(s);
diff --git a/absl/debugging/internal/demangle.cc b/absl/debugging/internal/demangle.cc
index c9ca2f3bdb..48354459bc 100644
--- a/absl/debugging/internal/demangle.cc
+++ b/absl/debugging/internal/demangle.cc
@@ -340,7 +340,7 @@ static bool ZeroOrMore(ParseFunc parse_func, State *state) {
 }
 
 // Append "str" at "out_cur_idx".  If there is an overflow, out_cur_idx is
-// set to out_end_idx+1.  The output std::string is ensured to
+// set to out_end_idx+1.  The output string is ensured to
 // always terminate with '\0' as long as there is no overflow.
 static void Append(State *state, const char *const str, const int length) {
   for (int i = 0; i < length; ++i) {
@@ -840,7 +840,7 @@ static bool ParseNumber(State *state, int *number_out) {
 }
 
 // Floating-point literals are encoded using a fixed-length lowercase
-// hexadecimal std::string.
+// hexadecimal string.
 static bool ParseFloatNumber(State *state) {
   ComplexityGuard guard(state);
   if (guard.IsTooComplex()) return false;
diff --git a/absl/debugging/symbolize_test.cc b/absl/debugging/symbolize_test.cc
index 5f2af47ee4..8029fbe9d2 100644
--- a/absl/debugging/symbolize_test.cc
+++ b/absl/debugging/symbolize_test.cc
@@ -321,7 +321,7 @@ TEST(Symbolize, SymbolizeWithMultipleMaps) {
   }
 }
 
-// Appends std::string(*args->arg) to args->symbol_buf.
+// Appends string(*args->arg) to args->symbol_buf.
 static void DummySymbolDecorator(
     const absl::debugging_internal::SymbolDecoratorArgs *args) {
   std::string *message = static_cast<std::string *>(args->arg);
diff --git a/absl/strings/ascii.h b/absl/strings/ascii.h
index 96a64541c3..4195d0934e 100644
--- a/absl/strings/ascii.h
+++ b/absl/strings/ascii.h
@@ -165,7 +165,7 @@ inline char ascii_tolower(unsigned char c) {
 // Converts the characters in `s` to lowercase, changing the contents of `s`.
 void AsciiStrToLower(std::string* s);
 
-// Creates a lowercase std::string from a given absl::string_view.
+// Creates a lowercase string from a given absl::string_view.
 ABSL_MUST_USE_RESULT inline std::string AsciiStrToLower(absl::string_view s) {
   std::string result(s);
   absl::AsciiStrToLower(&result);
@@ -183,7 +183,7 @@ inline char ascii_toupper(unsigned char c) {
 // Converts the characters in `s` to uppercase, changing the contents of `s`.
 void AsciiStrToUpper(std::string* s);
 
-// Creates an uppercase std::string from a given absl::string_view.
+// Creates an uppercase string from a given absl::string_view.
 ABSL_MUST_USE_RESULT inline std::string AsciiStrToUpper(absl::string_view s) {
   std::string result(s);
   absl::AsciiStrToUpper(&result);
@@ -198,7 +198,7 @@ ABSL_MUST_USE_RESULT inline absl::string_view StripLeadingAsciiWhitespace(
   return absl::string_view(it, str.end() - it);
 }
 
-// Strips in place whitespace from the beginning of the given std::string.
+// Strips in place whitespace from the beginning of the given string.
 inline void StripLeadingAsciiWhitespace(std::string* str) {
   auto it = std::find_if_not(str->begin(), str->end(), absl::ascii_isspace);
   str->erase(str->begin(), it);
@@ -212,7 +212,7 @@ ABSL_MUST_USE_RESULT inline absl::string_view StripTrailingAsciiWhitespace(
   return absl::string_view(str.begin(), str.rend() - it);
 }
 
-// Strips in place whitespace from the end of the given std::string
+// Strips in place whitespace from the end of the given string
 inline void StripTrailingAsciiWhitespace(std::string* str) {
   auto it = std::find_if_not(str->rbegin(), str->rend(), absl::ascii_isspace);
   str->erase(str->rend() - it);
@@ -225,7 +225,7 @@ ABSL_MUST_USE_RESULT inline absl::string_view StripAsciiWhitespace(
   return StripTrailingAsciiWhitespace(StripLeadingAsciiWhitespace(str));
 }
 
-// Strips in place whitespace from both ends of the given std::string
+// Strips in place whitespace from both ends of the given string
 inline void StripAsciiWhitespace(std::string* str) {
   StripTrailingAsciiWhitespace(str);
   StripLeadingAsciiWhitespace(str);
diff --git a/absl/strings/charconv.h b/absl/strings/charconv.h
index 3e313679c9..0735382962 100644
--- a/absl/strings/charconv.h
+++ b/absl/strings/charconv.h
@@ -22,7 +22,7 @@ namespace absl {
 // Workalike compatibilty version of std::chars_format from C++17.
 //
 // This is an bitfield enumerator which can be passed to absl::from_chars to
-// configure the std::string-to-float conversion.
+// configure the string-to-float conversion.
 enum class chars_format {
   scientific = 1,
   fixed = 2,
@@ -30,7 +30,7 @@ enum class chars_format {
   general = fixed | scientific,
 };
 
-// The return result of a std::string-to-number conversion.
+// The return result of a string-to-number conversion.
 //
 // `ec` will be set to `invalid_argument` if a well-formed number was not found
 // at the start of the input range, `result_out_of_range` if a well-formed
@@ -67,7 +67,7 @@ struct from_chars_result {
 // If `fmt` is set, it must be one of the enumerator values of the chars_format.
 // (This is despite the fact that chars_format is a bitmask type.)  If set to
 // `scientific`, a matching number must contain an exponent.  If set to `fixed`,
-// then an exponent will never match.  (For example, the std::string "1e5" will be
+// then an exponent will never match.  (For example, the string "1e5" will be
 // parsed as "1".)  If set to `hex`, then a hexadecimal float is parsed in the
 // format that strtod() accepts, except that a "0x" prefix is NOT matched.
 // (In particular, in `hex` mode, the input "0xff" results in the largest
diff --git a/absl/strings/charconv_test.cc b/absl/strings/charconv_test.cc
index f8d71cc6c4..89418fe948 100644
--- a/absl/strings/charconv_test.cc
+++ b/absl/strings/charconv_test.cc
@@ -33,7 +33,7 @@ namespace {
 
 #if ABSL_COMPILER_DOES_EXACT_ROUNDING
 
-// Tests that the given std::string is accepted by absl::from_chars, and that it
+// Tests that the given string is accepted by absl::from_chars, and that it
 // converts exactly equal to the given number.
 void TestDoubleParse(absl::string_view str, double expected_number) {
   SCOPED_TRACE(str);
@@ -250,7 +250,7 @@ TEST(FromChars, NearRoundingCasesExplicit) {
   EXPECT_EQ(ToFloat("459926601011.e15"), ldexpf(12466336, 65));
 }
 
-// Common test logic for converting a std::string which lies exactly halfway between
+// Common test logic for converting a string which lies exactly halfway between
 // two target floats.
 //
 // mantissa and exponent represent the precise value between two floating point
@@ -655,7 +655,7 @@ int NextStep(int step) {
 // is correct for in-bounds values, and that overflow and underflow are done
 // correctly for out-of-bounds values.
 //
-// input_generator maps from an integer index to a std::string to test.
+// input_generator maps from an integer index to a string to test.
 // expected_generator maps from an integer index to an expected Float value.
 // from_chars conversion of input_generator(i) should result in
 // expected_generator(i).
diff --git a/absl/strings/escaping.cc b/absl/strings/escaping.cc
index fbc9f75631..c8f18d8607 100644
--- a/absl/strings/escaping.cc
+++ b/absl/strings/escaping.cc
@@ -89,7 +89,7 @@ inline bool IsSurrogate(char32_t c, absl::string_view src, std::string* error) {
 //
 //    Unescapes C escape sequences and is the reverse of CEscape().
 //
-//    If 'source' is valid, stores the unescaped std::string and its size in
+//    If 'source' is valid, stores the unescaped string and its size in
 //    'dest' and 'dest_len' respectively, and returns true. Otherwise
 //    returns false and optionally stores the error description in
 //    'error'. Set 'error' to nullptr to disable error reporting.
@@ -294,7 +294,7 @@ bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
 // ----------------------------------------------------------------------
 // CUnescapeInternal()
 //
-//    Same as above but uses a C++ std::string for output. 'source' and 'dest'
+//    Same as above but uses a C++ string for output. 'source' and 'dest'
 //    may be the same.
 // ----------------------------------------------------------------------
 bool CUnescapeInternal(absl::string_view source, bool leave_nulls_escaped,
@@ -684,7 +684,7 @@ bool Base64UnescapeInternal(const char* src_param, size_t szsrc, char* dest,
 // The arrays below were generated by the following code
 // #include <sys/time.h>
 // #include <stdlib.h>
-// #include <std::string.h>
+// #include <string.h>
 // main()
 // {
 //   static const char Base64[] =
@@ -999,7 +999,7 @@ constexpr char kHexValue[256] = {
 /* clang-format on */
 
 // This is a templated function so that T can be either a char*
-// or a std::string.  This works because we use the [] operator to access
+// or a string.  This works because we use the [] operator to access
 // individual characters at a time.
 template <typename T>
 void HexStringToBytesInternal(const char* from, T to, ptrdiff_t num) {
@@ -1009,7 +1009,7 @@ void HexStringToBytesInternal(const char* from, T to, ptrdiff_t num) {
   }
 }
 
-// This is a templated function so that T can be either a char* or a std::string.
+// This is a templated function so that T can be either a char* or a string.
 template <typename T>
 void BytesToHexStringInternal(const unsigned char* src, T dest, ptrdiff_t num) {
   auto dest_ptr = &dest[0];
diff --git a/absl/strings/escaping.h b/absl/strings/escaping.h
index 5a13b1fb84..beb67a27a7 100644
--- a/absl/strings/escaping.h
+++ b/absl/strings/escaping.h
@@ -17,7 +17,7 @@
 // File: escaping.h
 // -----------------------------------------------------------------------------
 //
-// This header file contains std::string utilities involved in escaping and
+// This header file contains string utilities involved in escaping and
 // unescaping strings in various ways.
 //
 
@@ -37,7 +37,7 @@ namespace absl {
 
 // CUnescape()
 //
-// Unescapes a `source` std::string and copies it into `dest`, rewriting C-style
+// Unescapes a `source` string and copies it into `dest`, rewriting C-style
 // escape sequences (http://en.cppreference.com/w/cpp/language/escape) into
 // their proper code point equivalents, returning `true` if successful.
 //
@@ -78,7 +78,7 @@ inline bool CUnescape(absl::string_view source, std::string* dest) {
 
 // CEscape()
 //
-// Escapes a 'src' std::string using C-style escapes sequences
+// Escapes a 'src' string using C-style escapes sequences
 // (http://en.cppreference.com/w/cpp/language/escape), escaping other
 // non-printable/non-whitespace bytes as octal sequences (e.g. "\377").
 //
@@ -91,7 +91,7 @@ std::string CEscape(absl::string_view src);
 
 // CHexEscape()
 //
-// Escapes a 'src' std::string using C-style escape sequences, escaping
+// Escapes a 'src' string using C-style escape sequences, escaping
 // other non-printable/non-whitespace bytes as hexadecimal sequences (e.g.
 // "\xFF").
 //
@@ -104,7 +104,7 @@ std::string CHexEscape(absl::string_view src);
 
 // Utf8SafeCEscape()
 //
-// Escapes a 'src' std::string using C-style escape sequences, escaping bytes as
+// Escapes a 'src' string using C-style escape sequences, escaping bytes as
 // octal sequences, and passing through UTF-8 characters without conversion.
 // I.e., when encountering any bytes with their high bit set, this function
 // will not escape those values, whether or not they are valid UTF-8.
@@ -112,47 +112,47 @@ std::string Utf8SafeCEscape(absl::string_view src);
 
 // Utf8SafeCHexEscape()
 //
-// Escapes a 'src' std::string using C-style escape sequences, escaping bytes as
+// Escapes a 'src' string using C-style escape sequences, escaping bytes as
 // hexadecimal sequences, and passing through UTF-8 characters without
 // conversion.
 std::string Utf8SafeCHexEscape(absl::string_view src);
 
 // Base64Unescape()
 //
-// Converts a `src` std::string encoded in Base64 to its binary equivalent, writing
+// Converts a `src` string encoded in Base64 to its binary equivalent, writing
 // it to a `dest` buffer, returning `true` on success. If `src` contains invalid
 // characters, `dest` is cleared and returns `false`.
 bool Base64Unescape(absl::string_view src, std::string* dest);
 
 // WebSafeBase64Unescape()
 //
-// Converts a `src` std::string encoded in Base64 to its binary equivalent, writing
+// Converts a `src` string encoded in Base64 to its binary equivalent, writing
 // it to a `dest` buffer, but using '-' instead of '+', and '_' instead of '/'.
 // If `src` contains invalid characters, `dest` is cleared and returns `false`.
 bool WebSafeBase64Unescape(absl::string_view src, std::string* dest);
 
 // Base64Escape()
 //
-// Encodes a `src` std::string into a `dest` buffer using base64 encoding, with
+// Encodes a `src` string into a `dest` buffer using base64 encoding, with
 // padding characters. This function conforms with RFC 4648 section 4 (base64).
 void Base64Escape(absl::string_view src, std::string* dest);
 
 // WebSafeBase64Escape()
 //
-// Encodes a `src` std::string into a `dest` buffer using '-' instead of '+' and
+// Encodes a `src` string into a `dest` buffer using '-' instead of '+' and
 // '_' instead of '/', and without padding. This function conforms with RFC 4648
 // section 5 (base64url).
 void WebSafeBase64Escape(absl::string_view src, std::string* dest);
 
 // HexStringToBytes()
 //
-// Converts an ASCII hex std::string into bytes, returning binary data of length
+// Converts an ASCII hex string into bytes, returning binary data of length
 // `from.size()/2`.
 std::string HexStringToBytes(absl::string_view from);
 
 // BytesToHexString()
 //
-// Converts binary data into an ASCII text std::string, returning a std::string of size
+// Converts binary data into an ASCII text string, returning a string of size
 // `2*from.size()`.
 std::string BytesToHexString(absl::string_view from);
 
diff --git a/absl/strings/internal/charconv_parse.cc b/absl/strings/internal/charconv_parse.cc
index a04cc67669..7e4dabc226 100644
--- a/absl/strings/internal/charconv_parse.cc
+++ b/absl/strings/internal/charconv_parse.cc
@@ -91,7 +91,7 @@ static_assert(std::numeric_limits<int>::digits10 >= kDecimalExponentDigitsMax,
 
 // To avoid incredibly large inputs causing integer overflow for our exponent,
 // we impose an arbitrary but very large limit on the number of significant
-// digits we will accept.  The implementation refuses to match a std::string with
+// digits we will accept.  The implementation refuses to match a string with
 // more consecutive significant mantissa digits than this.
 constexpr int kDecimalDigitLimit = 50000000;
 
diff --git a/absl/strings/internal/charconv_parse_test.cc b/absl/strings/internal/charconv_parse_test.cc
index 1ff8600497..f48b9aee1a 100644
--- a/absl/strings/internal/charconv_parse_test.cc
+++ b/absl/strings/internal/charconv_parse_test.cc
@@ -29,16 +29,16 @@ using absl::strings_internal::ParseFloat;
 
 namespace {
 
-// Check that a given std::string input is parsed to the expected mantissa and
+// Check that a given string input is parsed to the expected mantissa and
 // exponent.
 //
-// Input std::string `s` must contain a '$' character.  It marks the end of the
+// Input string `s` must contain a '$' character.  It marks the end of the
 // characters that should be consumed by the match.  It is stripped from the
 // input to ParseFloat.
 //
-// If input std::string `s` contains '[' and ']' characters, these mark the region
+// If input string `s` contains '[' and ']' characters, these mark the region
 // of characters that should be marked as the "subrange".  For NaNs, this is
-// the location of the extended NaN std::string.  For numbers, this is the location
+// the location of the extended NaN string.  For numbers, this is the location
 // of the full, over-large mantissa.
 template <int base>
 void ExpectParsedFloat(std::string s, absl::chars_format format_flags,
@@ -92,10 +92,10 @@ void ExpectParsedFloat(std::string s, absl::chars_format format_flags,
   EXPECT_EQ(characters_matched, expected_characters_matched);
 }
 
-// Check that a given std::string input is parsed to the expected mantissa and
+// Check that a given string input is parsed to the expected mantissa and
 // exponent.
 //
-// Input std::string `s` must contain a '$' character.  It marks the end of the
+// Input string `s` must contain a '$' character.  It marks the end of the
 // characters that were consumed by the match.
 template <int base>
 void ExpectNumber(std::string s, absl::chars_format format_flags,
@@ -106,7 +106,7 @@ void ExpectNumber(std::string s, absl::chars_format format_flags,
                           expected_literal_exponent);
 }
 
-// Check that a given std::string input is parsed to the given special value.
+// Check that a given string input is parsed to the given special value.
 //
 // This tests against both number bases, since infinities and NaNs have
 // identical representations in both modes.
@@ -116,7 +116,7 @@ void ExpectSpecial(const std::string& s, absl::chars_format format_flags,
   ExpectParsedFloat<16>(s, format_flags, type, 0, 0);
 }
 
-// Check that a given input std::string is not matched by Float.
+// Check that a given input string is not matched by Float.
 template <int base>
 void ExpectFailedParse(absl::string_view s, absl::chars_format format_flags) {
   ParsedFloat parsed =
diff --git a/absl/strings/internal/memutil.h b/absl/strings/internal/memutil.h
index a6f1c69138..7de383b19e 100644
--- a/absl/strings/internal/memutil.h
+++ b/absl/strings/internal/memutil.h
@@ -14,7 +14,7 @@
 // limitations under the License.
 //
 
-// These routines provide mem versions of standard C std::string routines,
+// These routines provide mem versions of standard C string routines,
 // such as strpbrk.  They function exactly the same as the str versions,
 // so if you wonder what they are, replace the word "mem" by
 // "str" and check out the man page.  I could return void*, as the
@@ -22,14 +22,14 @@
 // since this is by far the most common way these functions are called.
 //
 // The difference between the mem and str versions is the mem version
-// takes a pointer and a length, rather than a '\0'-terminated std::string.
+// takes a pointer and a length, rather than a '\0'-terminated string.
 // The memcase* routines defined here assume the locale is "C"
 // (they use absl::ascii_tolower instead of tolower).
 //
 // These routines are based on the BSD library.
 //
-// Here's a list of routines from std::string.h, and their mem analogues.
-// Functions in lowercase are defined in std::string.h; those in UPPERCASE
+// Here's a list of routines from string.h, and their mem analogues.
+// Functions in lowercase are defined in string.h; those in UPPERCASE
 // are defined here:
 //
 // strlen                  --
diff --git a/absl/strings/internal/ostringstream.h b/absl/strings/internal/ostringstream.h
index 6e1325b914..e81a89affe 100644
--- a/absl/strings/internal/ostringstream.h
+++ b/absl/strings/internal/ostringstream.h
@@ -25,18 +25,18 @@
 namespace absl {
 namespace strings_internal {
 
-// The same as std::ostringstream but appends to a user-specified std::string,
+// The same as std::ostringstream but appends to a user-specified string,
 // and is faster. It is ~70% faster to create, ~50% faster to write to, and
-// completely free to extract the result std::string.
+// completely free to extract the result string.
 //
-//   std::string s;
+//   string s;
 //   OStringStream strm(&s);
 //   strm << 42 << ' ' << 3.14;  // appends to `s`
 //
 // The stream object doesn't have to be named. Starting from C++11 operator<<
 // works with rvalues of std::ostream.
 //
-//   std::string s;
+//   string s;
 //   OStringStream(&s) << 42 << ' ' << 3.14;  // appends to `s`
 //
 // OStringStream is faster to create than std::ostringstream but it's still
@@ -45,14 +45,14 @@ namespace strings_internal {
 //
 // Creates unnecessary instances of OStringStream: slow.
 //
-//   std::string s;
+//   string s;
 //   OStringStream(&s) << 42;
 //   OStringStream(&s) << ' ';
 //   OStringStream(&s) << 3.14;
 //
 // Creates a single instance of OStringStream and reuses it: fast.
 //
-//   std::string s;
+//   string s;
 //   OStringStream strm(&s);
 //   strm << 42;
 //   strm << ' ';
diff --git a/absl/strings/internal/resize_uninitialized.h b/absl/strings/internal/resize_uninitialized.h
index 0157ca0245..a94e0547b5 100644
--- a/absl/strings/internal/resize_uninitialized.h
+++ b/absl/strings/internal/resize_uninitialized.h
@@ -44,8 +44,8 @@ void ResizeUninit(string_type* s, size_t new_size, std::false_type) {
   s->resize(new_size);
 }
 
-// Returns true if the std::string implementation supports a resize where
-// the new characters added to the std::string are left untouched.
+// Returns true if the string implementation supports a resize where
+// the new characters added to the string are left untouched.
 //
 // (A better name might be "STLStringSupportsUninitializedResize", alluding to
 // the previous function.)
@@ -57,7 +57,7 @@ inline constexpr bool STLStringSupportsNontrashingResize(string_type*) {
 // Like str->resize(new_size), except any new characters added to "*str" as a
 // result of resizing may be left uninitialized, rather than being filled with
 // '0' bytes. Typically used when code is then going to overwrite the backing
-// store of the std::string with known data. Uses a Google extension to std::string.
+// store of the string with known data. Uses a Google extension to ::string.
 template <typename string_type, typename = void>
 inline void STLStringResizeUninitialized(string_type* s, size_t new_size) {
   ResizeUninit(s, new_size, HasResizeUninitialized<string_type>());
diff --git a/absl/strings/internal/str_format/bind.h b/absl/strings/internal/str_format/bind.h
index 4008611211..9d3d67c634 100644
--- a/absl/strings/internal/str_format/bind.h
+++ b/absl/strings/internal/str_format/bind.h
@@ -168,7 +168,7 @@ int FprintF(std::FILE* output, const UntypedFormatSpecImpl& format,
 int SnprintF(char* output, size_t size, const UntypedFormatSpecImpl& format,
              absl::Span<const FormatArgImpl> args);
 
-// Returned by Streamed(v). Converts via '%s' to the std::string created
+// Returned by Streamed(v). Converts via '%s' to the string created
 // by std::ostream << v.
 template <typename T>
 class StreamedWrapper {
diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h
index 810330b9d7..f43195c127 100644
--- a/absl/strings/internal/str_format/extension.h
+++ b/absl/strings/internal/str_format/extension.h
@@ -57,7 +57,7 @@ class FormatRawSinkImpl {
   void (*write_)(void*, string_view);
 };
 
-// An abstraction to which conversions write their std::string data.
+// An abstraction to which conversions write their string data.
 class FormatSinkImpl {
  public:
   explicit FormatSinkImpl(FormatRawSinkImpl raw) : raw_(raw) {}
diff --git a/absl/strings/internal/str_format/parser.h b/absl/strings/internal/str_format/parser.h
index 5bebc95540..7414e1534c 100644
--- a/absl/strings/internal/str_format/parser.h
+++ b/absl/strings/internal/str_format/parser.h
@@ -75,14 +75,14 @@ struct UnboundConversion {
 bool ConsumeUnboundConversion(string_view* src, UnboundConversion* conv,
                               int* next_arg);
 
-// Parse the format std::string provided in 'src' and pass the identified items into
+// Parse the format string provided in 'src' and pass the identified items into
 // 'consumer'.
 // Text runs will be passed by calling
 //   Consumer::Append(string_view);
 // ConversionItems will be passed by calling
 //   Consumer::ConvertOne(UnboundConversion, string_view);
 // In the case of ConvertOne, the string_view that is passed is the
-// portion of the format std::string corresponding to the conversion, not including
+// portion of the format string corresponding to the conversion, not including
 // the leading %. On success, it returns true. On failure, it stops and returns
 // false.
 template <typename Consumer>
@@ -237,7 +237,7 @@ class ParsedFormatBase {
 // This class also supports runtime format checking with the ::New() and
 // ::NewAllowIgnored() factory functions.
 // This is the only API that allows the user to pass a runtime specified format
-// std::string. These factory functions will return NULL if the format does not match
+// string. These factory functions will return NULL if the format does not match
 // the conversions requested by the user.
 template <str_format_internal::Conv... C>
 class ExtendedParsedFormat : public str_format_internal::ParsedFormatBase {
diff --git a/absl/strings/internal/str_join_internal.h b/absl/strings/internal/str_join_internal.h
index a734758c21..0058fc8aa4 100644
--- a/absl/strings/internal/str_join_internal.h
+++ b/absl/strings/internal/str_join_internal.h
@@ -189,7 +189,7 @@ struct DefaultFormatter<std::unique_ptr<ValueType>>
 //
 
 // The main joining algorithm. This simply joins the elements in the given
-// iterator range, each separated by the given separator, into an output std::string,
+// iterator range, each separated by the given separator, into an output string,
 // and formats each element using the provided Formatter object.
 template <typename Iterator, typename Formatter>
 std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
@@ -205,20 +205,20 @@ std::string JoinAlgorithm(Iterator start, Iterator end, absl::string_view s,
 }
 
 // A joining algorithm that's optimized for a forward iterator range of
-// std::string-like objects that do not need any additional formatting. This is to
-// optimize the common case of joining, say, a std::vector<std::string> or a
+// string-like objects that do not need any additional formatting. This is to
+// optimize the common case of joining, say, a std::vector<string> or a
 // std::vector<absl::string_view>.
 //
 // This is an overload of the previous JoinAlgorithm() function. Here the
 // Formatter argument is of type NoFormatter. Since NoFormatter is an internal
 // type, this overload is only invoked when strings::Join() is called with a
-// range of std::string-like objects (e.g., std::string, absl::string_view), and an
+// range of string-like objects (e.g., string, absl::string_view), and an
 // explicit Formatter argument was NOT specified.
 //
 // The optimization is that the needed space will be reserved in the output
-// std::string to avoid the need to resize while appending. To do this, the iterator
+// string to avoid the need to resize while appending. To do this, the iterator
 // range will be traversed twice: once to calculate the total needed size, and
-// then again to copy the elements and delimiters to the output std::string.
+// then again to copy the elements and delimiters to the output string.
 template <typename Iterator,
           typename = typename std::enable_if<std::is_convertible<
               typename std::iterator_traits<Iterator>::iterator_category,
diff --git a/absl/strings/internal/str_split_internal.h b/absl/strings/internal/str_split_internal.h
index 9cf0833f49..73a30fdfd9 100644
--- a/absl/strings/internal/str_split_internal.h
+++ b/absl/strings/internal/str_split_internal.h
@@ -51,7 +51,7 @@ namespace strings_internal {
 
 // This class is implicitly constructible from everything that absl::string_view
 // is implicitly constructible from. If it's constructed from a temporary
-// std::string, the data is moved into a data member so its lifetime matches that of
+// string, the data is moved into a data member so its lifetime matches that of
 // the ConvertibleToStringView instance.
 class ConvertibleToStringView {
  public:
@@ -102,7 +102,7 @@ ConvertibleToStringView(std::string&& s)  // NOLINT(runtime/explicit)
   absl::string_view value_;
 };
 
-// An iterator that enumerates the parts of a std::string from a Splitter. The text
+// An iterator that enumerates the parts of a string from a Splitter. The text
 // to be split, the Delimiter, and the Predicate are all taken from the given
 // Splitter object. Iterators may only be compared if they refer to the same
 // Splitter instance.
diff --git a/absl/strings/match.h b/absl/strings/match.h
index 108b6048b0..942a196b88 100644
--- a/absl/strings/match.h
+++ b/absl/strings/match.h
@@ -17,7 +17,7 @@
 // File: match.h
 // -----------------------------------------------------------------------------
 //
-// This file contains simple utilities for performing std::string matching checks.
+// This file contains simple utilities for performing string matching checks.
 // All of these function parameters are specified as `absl::string_view`,
 // meaning that these functions can accept `std::string`, `absl::string_view` or
 // nul-terminated C-style strings.
@@ -41,14 +41,14 @@ namespace absl {
 
 // StrContains()
 //
-// Returns whether a given std::string `haystack` contains the substring `needle`.
+// Returns whether a given string `haystack` contains the substring `needle`.
 inline bool StrContains(absl::string_view haystack, absl::string_view needle) {
   return haystack.find(needle, 0) != haystack.npos;
 }
 
 // StartsWith()
 //
-// Returns whether a given std::string `text` begins with `prefix`.
+// Returns whether a given string `text` begins with `prefix`.
 inline bool StartsWith(absl::string_view text, absl::string_view prefix) {
   return prefix.empty() ||
          (text.size() >= prefix.size() &&
@@ -57,7 +57,7 @@ inline bool StartsWith(absl::string_view text, absl::string_view prefix) {
 
 // EndsWith()
 //
-// Returns whether a given std::string `text` ends with `suffix`.
+// Returns whether a given string `text` ends with `suffix`.
 inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
   return suffix.empty() ||
          (text.size() >= suffix.size() &&
@@ -68,13 +68,13 @@ inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
 
 // StartsWithIgnoreCase()
 //
-// Returns whether a given std::string `text` starts with `starts_with`, ignoring
+// Returns whether a given string `text` starts with `starts_with`, ignoring
 // case in the comparison.
 bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix);
 
 // EndsWithIgnoreCase()
 //
-// Returns whether a given std::string `text` ends with `ends_with`, ignoring case
+// Returns whether a given string `text` ends with `ends_with`, ignoring case
 // in the comparison.
 bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix);
 
diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc
index f842ed85e9..cc878f5b00 100644
--- a/absl/strings/numbers.cc
+++ b/absl/strings/numbers.cc
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// This file contains std::string processing functions related to
+// This file contains string processing functions related to
 // numeric values.
 
 #include "absl/strings/numbers.h"
@@ -161,8 +161,8 @@ bool SimpleAtob(absl::string_view str, bool* value) {
 // their output to the beginning of the buffer.  The caller is responsible
 // for ensuring that the buffer has enough space to hold the output.
 //
-// Returns a pointer to the end of the std::string (i.e. the null character
-// terminating the std::string).
+// Returns a pointer to the end of the string (i.e. the null character
+// terminating the string).
 // ----------------------------------------------------------------------
 
 namespace {
diff --git a/absl/strings/numbers.h b/absl/strings/numbers.h
index fbed273e09..f9b2ccef94 100644
--- a/absl/strings/numbers.h
+++ b/absl/strings/numbers.h
@@ -41,8 +41,8 @@ namespace absl {
 
 // SimpleAtoi()
 //
-// Converts the given std::string into an integer value, returning `true` if
-// successful. The std::string must reflect a base-10 integer (optionally followed or
+// Converts the given string into an integer value, returning `true` if
+// successful. The string must reflect a base-10 integer (optionally followed or
 // preceded by ASCII whitespace) whose value falls within the range of the
 // integer type.
 template <typename int_type>
@@ -50,23 +50,23 @@ ABSL_MUST_USE_RESULT bool SimpleAtoi(absl::string_view s, int_type* out);
 
 // SimpleAtof()
 //
-// Converts the given std::string (optionally followed or preceded by ASCII
+// Converts the given string (optionally followed or preceded by ASCII
 // whitespace) into a float, which may be rounded on overflow or underflow.
-// See http://en.cppreference.com/w/c/std::string/byte/strtof for details about the
+// See http://en.cppreference.com/w/c/string/byte/strtof for details about the
 // allowed formats for `str`.
 ABSL_MUST_USE_RESULT bool SimpleAtof(absl::string_view str, float* value);
 
 // SimpleAtod()
 //
-// Converts the given std::string (optionally followed or preceded by ASCII
+// Converts the given string (optionally followed or preceded by ASCII
 // whitespace) into a double, which may be rounded on overflow or underflow.
-// See http://en.cppreference.com/w/c/std::string/byte/strtof for details about the
+// See http://en.cppreference.com/w/c/string/byte/strtof for details about the
 // allowed formats for `str`.
 ABSL_MUST_USE_RESULT bool SimpleAtod(absl::string_view str, double* value);
 
 // SimpleAtob()
 //
-// Converts the given std::string into a boolean, returning `true` if successful.
+// Converts the given string into a boolean, returning `true` if successful.
 // The following case-insensitive strings are interpreted as boolean `true`:
 // "true", "t", "yes", "y", "1". The following case-insensitive strings
 // are interpreted as boolean `false`: "false", "f", "no", "n", "0".
@@ -169,9 +169,9 @@ ABSL_MUST_USE_RESULT bool safe_strtoi_base(absl::string_view s, int_type* out,
 
 // SimpleAtoi()
 //
-// Converts a std::string to an integer, using `safe_strto?()` functions for actual
+// Converts a string to an integer, using `safe_strto?()` functions for actual
 // parsing, returning `true` if successful. The `safe_strto?()` functions apply
-// strict checking; the std::string must be a base-10 integer, optionally followed or
+// strict checking; the string must be a base-10 integer, optionally followed or
 // preceded by ASCII whitespace, with a value in the range of the corresponding
 // integer type.
 template <typename int_type>
diff --git a/absl/strings/numbers_benchmark.cc b/absl/strings/numbers_benchmark.cc
index 8ef650b9a3..0570b75863 100644
--- a/absl/strings/numbers_benchmark.cc
+++ b/absl/strings/numbers_benchmark.cc
@@ -158,7 +158,7 @@ BENCHMARK(BM_safe_strtou64_string)
     ->ArgPair(16, 10)
     ->ArgPair(16, 16);
 
-// Returns a vector of `num_strings` strings. Each std::string represents a
+// Returns a vector of `num_strings` strings. Each string represents a
 // floating point number with `num_digits` digits before the decimal point and
 // another `num_digits` digits after.
 std::vector<std::string> MakeFloatStrings(int num_strings, int num_digits) {
diff --git a/absl/strings/numbers_test.cc b/absl/strings/numbers_test.cc
index 27cc0479e3..36fc0d64fd 100644
--- a/absl/strings/numbers_test.cc
+++ b/absl/strings/numbers_test.cc
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// This file tests std::string processing functions related to numeric values.
+// This file tests string processing functions related to numeric values.
 
 #include "absl/strings/numbers.h"
 
diff --git a/absl/strings/str_cat.cc b/absl/strings/str_cat.cc
index 3fe8c95eca..efa4fd73db 100644
--- a/absl/strings/str_cat.cc
+++ b/absl/strings/str_cat.cc
@@ -79,7 +79,7 @@ AlphaNum::AlphaNum(Dec dec) {
 // ----------------------------------------------------------------------
 // StrCat()
 //    This merges the given strings or integers, with no delimiter.  This
-//    is designed to be the fastest possible way to construct a std::string out
+//    is designed to be the fastest possible way to construct a string out
 //    of a mix of raw C strings, StringPieces, strings, and integer values.
 // ----------------------------------------------------------------------
 
@@ -154,10 +154,10 @@ std::string CatPieces(std::initializer_list<absl::string_view> pieces) {
 }
 
 // It's possible to call StrAppend with an absl::string_view that is itself a
-// fragment of the std::string we're appending to.  However the results of this are
+// fragment of the string we're appending to.  However the results of this are
 // random. Therefore, check for this in debug mode.  Use unsigned math so we
 // only have to do one comparison. Note, there's an exception case: appending an
-// empty std::string is always allowed.
+// empty string is always allowed.
 #define ASSERT_NO_OVERLAP(dest, src) \
   assert(((src).size() == 0) ||      \
          (uintptr_t((src).data() - (dest).data()) > uintptr_t((dest).size())))
diff --git a/absl/strings/str_cat.h b/absl/strings/str_cat.h
index e5501a5012..da9ed9a269 100644
--- a/absl/strings/str_cat.h
+++ b/absl/strings/str_cat.h
@@ -23,7 +23,7 @@
 // designed to be used as a parameter type that efficiently manages conversion
 // to strings and avoids copies in the above operations.
 //
-// Any routine accepting either a std::string or a number may accept `AlphaNum`.
+// Any routine accepting either a string or a number may accept `AlphaNum`.
 // The basic idea is that by accepting a `const AlphaNum &` as an argument
 // to your function, your callers will automagically convert bools, integers,
 // and floating point values to strings for you.
@@ -65,7 +65,7 @@
 namespace absl {
 
 namespace strings_internal {
-// AlphaNumBuffer allows a way to pass a std::string to StrCat without having to do
+// AlphaNumBuffer allows a way to pass a string to StrCat without having to do
 // memory allocation.  It is simply a pair of a fixed-size character array, and
 // a size.  Please don't use outside of absl, yet.
 template <size_t max_size>
@@ -119,8 +119,8 @@ enum PadSpec : uint8_t {
 // Hex
 // -----------------------------------------------------------------------------
 //
-// `Hex` stores a set of hexadecimal std::string conversion parameters for use
-// within `AlphaNum` std::string conversions.
+// `Hex` stores a set of hexadecimal string conversion parameters for use
+// within `AlphaNum` string conversions.
 struct Hex {
   uint64_t value;
   uint8_t width;
@@ -168,8 +168,8 @@ struct Hex {
 // Dec
 // -----------------------------------------------------------------------------
 //
-// `Dec` stores a set of decimal std::string conversion parameters for use
-// within `AlphaNum` std::string conversions.  Dec is slower than the default
+// `Dec` stores a set of decimal string conversion parameters for use
+// within `AlphaNum` string conversions.  Dec is slower than the default
 // integer conversion, so use it only if you need padding.
 struct Dec {
   uint64_t value;
@@ -271,7 +271,7 @@ class AlphaNum {
 //
 // Merges given strings or numbers, using no delimiter(s).
 //
-// `StrCat()` is designed to be the fastest possible way to construct a std::string
+// `StrCat()` is designed to be the fastest possible way to construct a string
 // out of a mix of raw C strings, string_views, strings, bool values,
 // and numeric values.
 //
@@ -279,7 +279,7 @@ class AlphaNum {
 // works poorly on strings built up out of fragments.
 //
 // For clarity and performance, don't use `StrCat()` when appending to a
-// std::string. Use `StrAppend()` instead. In particular, avoid using any of these
+// string. Use `StrAppend()` instead. In particular, avoid using any of these
 // (anti-)patterns:
 //
 //   str.append(StrCat(...))
@@ -328,26 +328,26 @@ ABSL_MUST_USE_RESULT inline std::string StrCat(const AlphaNum& a, const AlphaNum
 // StrAppend()
 // -----------------------------------------------------------------------------
 //
-// Appends a std::string or set of strings to an existing std::string, in a similar
+// Appends a string or set of strings to an existing string, in a similar
 // fashion to `StrCat()`.
 //
 // WARNING: `StrAppend(&str, a, b, c, ...)` requires that none of the
 // a, b, c, parameters be a reference into str. For speed, `StrAppend()` does
 // not try to check each of its input arguments to be sure that they are not
-// a subset of the std::string being appended to. That is, while this will work:
+// a subset of the string being appended to. That is, while this will work:
 //
-//   std::string s = "foo";
+//   string s = "foo";
 //   s += s;
 //
 // This output is undefined:
 //
-//   std::string s = "foo";
+//   string s = "foo";
 //   StrAppend(&s, s);
 //
 // This output is undefined as well, since `absl::string_view` does not own its
 // data:
 //
-//   std::string s = "foobar";
+//   string s = "foobar";
 //   absl::string_view p = s;
 //   StrAppend(&s, p);
 
diff --git a/absl/strings/str_format.h b/absl/strings/str_format.h
index 9f44c7133f..2d07725de2 100644
--- a/absl/strings/str_format.h
+++ b/absl/strings/str_format.h
@@ -18,20 +18,20 @@
 // -----------------------------------------------------------------------------
 //
 // The `str_format` library is a typesafe replacement for the family of
-// `printf()` std::string formatting routines within the `<cstdio>` standard library
+// `printf()` string formatting routines within the `<cstdio>` standard library
 // header. Like the `printf` family, the `str_format` uses a "format string" to
 // perform argument substitutions based on types.
 //
 // Example:
 //
-//   std::string s = absl::StrFormat("%s %s You have $%d!", "Hello", name, dollars);
+//   string s = absl::StrFormat("%s %s You have $%d!", "Hello", name, dollars);
 //
 // The library consists of the following basic utilities:
 //
 //   * `absl::StrFormat()`, a type-safe replacement for `std::sprintf()`, to
-//     write a format std::string to a `string` value.
-//   * `absl::StrAppendFormat()` to append a format std::string to a `string`
-//   * `absl::StreamFormat()` to more efficiently write a format std::string to a
+//     write a format string to a `string` value.
+//   * `absl::StrAppendFormat()` to append a format string to a `string`
+//   * `absl::StreamFormat()` to more efficiently write a format string to a
 //     stream, such as`std::cout`.
 //   * `absl::PrintF()`, `absl::FPrintF()` and `absl::SNPrintF()` as
 //     replacements for `std::printf()`, `std::fprintf()` and `std::snprintf()`.
@@ -39,15 +39,15 @@
 //     Note: a version of `std::sprintf()` is not supported as it is
 //     generally unsafe due to buffer overflows.
 //
-// Additionally, you can provide a format std::string (and its associated arguments)
+// Additionally, you can provide a format string (and its associated arguments)
 // using one of the following abstractions:
 //
-//   * A `FormatSpec` class template fully encapsulates a format std::string and its
+//   * A `FormatSpec` class template fully encapsulates a format string and its
 //     type arguments and is usually provided to `str_format` functions as a
 //     variadic argument of type `FormatSpec<Arg...>`. The `FormatSpec<Args...>`
 //     template is evaluated at compile-time, providing type safety.
 //   * A `ParsedFormat` instance, which encapsulates a specific, pre-compiled
-//     format std::string for a specific set of type(s), and which can be passed
+//     format string for a specific set of type(s), and which can be passed
 //     between API boundaries. (The `FormatSpec` type should not be used
 //     directly.)
 //
@@ -60,7 +60,7 @@
 //
 //   * A `FormatUntyped()` function that is similar to `Format()` except it is
 //     loosely typed. `FormatUntyped()` is not a template and does not perform
-//     any compile-time checking of the format std::string; instead, it returns a
+//     any compile-time checking of the format string; instead, it returns a
 //     boolean from a runtime check.
 //
 // In addition, the `str_format` library provides extension points for
@@ -89,7 +89,7 @@ namespace absl {
 // Example:
 //
 //   absl::UntypedFormatSpec format("%d");
-//   std::string out;
+//   string out;
 //   CHECK(absl::FormatUntyped(&out, format, {absl::FormatArg(1)}));
 class UntypedFormatSpec {
  public:
@@ -135,7 +135,7 @@ str_format_internal::StreamedWrapper<T> FormatStreamed(const T& v) {
 // Example:
 //
 //   int n = 0;
-//   std::string s = absl::StrFormat("%s%d%n", "hello", 123,
+//   string s = absl::StrFormat("%s%d%n", "hello", 123,
 //                   absl::FormatCountCapture(&n));
 //   EXPECT_EQ(8, n);
 class FormatCountCapture {
@@ -155,10 +155,10 @@ class FormatCountCapture {
 
 // FormatSpec
 //
-// The `FormatSpec` type defines the makeup of a format std::string within the
+// The `FormatSpec` type defines the makeup of a format string within the
 // `str_format` library. You should not need to use or manipulate this type
 // directly. A `FormatSpec` is a variadic class template that is evaluated at
-// compile-time, according to the format std::string and arguments that are passed
+// compile-time, according to the format string and arguments that are passed
 // to it.
 //
 // For a `FormatSpec` to be valid at compile-time, it must be provided as
@@ -166,12 +166,12 @@ class FormatCountCapture {
 //
 // * A `constexpr` literal or `absl::string_view`, which is how it most often
 //   used.
-// * A `ParsedFormat` instantiation, which ensures the format std::string is
+// * A `ParsedFormat` instantiation, which ensures the format string is
 //   valid before use. (See below.)
 //
 // Example:
 //
-//   // Provided as a std::string literal.
+//   // Provided as a string literal.
 //   absl::StrFormat("Welcome to %s, Number %d!", "The Village", 6);
 //
 //   // Provided as a constexpr absl::string_view.
@@ -183,7 +183,7 @@ class FormatCountCapture {
 //   absl::ParsedFormat<'s', 'd'> formatString("Welcome to %s, Number %d!");
 //   absl::StrFormat(formatString, "TheVillage", 6);
 //
-// A format std::string generally follows the POSIX syntax as used within the POSIX
+// A format string generally follows the POSIX syntax as used within the POSIX
 // `printf` specification.
 //
 // (See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/printf.html.)
@@ -223,7 +223,7 @@ class FormatCountCapture {
 //     "%p", *int               -> "0x7ffdeb6ad2a4"
 //
 //     int n = 0;
-//     std::string s = absl::StrFormat(
+//     string s = absl::StrFormat(
 //         "%s%d%n", "hello", 123, absl::FormatCountCapture(&n));
 //     EXPECT_EQ(8, n);
 //
@@ -236,7 +236,7 @@ class FormatCountCapture {
 //
 // However, in the `str_format` library, a format conversion specifies a broader
 // C++ conceptual category instead of an exact type. For example, `%s` binds to
-// any std::string-like argument, so `std::string`, `absl::string_view`, and
+// any string-like argument, so `std::string`, `absl::string_view`, and
 // `const char*` are all accepted. Likewise, `%d` accepts any integer-like
 // argument, etc.
 
@@ -248,7 +248,7 @@ using FormatSpec =
 //
 // A `ParsedFormat` is a class template representing a preparsed `FormatSpec`,
 // with template arguments specifying the conversion characters used within the
-// format std::string. Such characters must be valid format type specifiers, and
+// format string. Such characters must be valid format type specifiers, and
 // these type specifiers are checked at compile-time.
 //
 // Instances of `ParsedFormat` can be created, copied, and reused to speed up
@@ -275,26 +275,26 @@ using ParsedFormat = str_format_internal::ExtendedParsedFormat<
 
 // StrFormat()
 //
-// Returns a `string` given a `printf()`-style format std::string and zero or more
+// Returns a `string` given a `printf()`-style format string and zero or more
 // additional arguments. Use it as you would `sprintf()`. `StrFormat()` is the
 // primary formatting function within the `str_format` library, and should be
 // used in most cases where you need type-safe conversion of types into
 // formatted strings.
 //
-// The format std::string generally consists of ordinary character data along with
+// The format string generally consists of ordinary character data along with
 // one or more format conversion specifiers (denoted by the `%` character).
-// Ordinary character data is returned unchanged into the result std::string, while
+// Ordinary character data is returned unchanged into the result string, while
 // each conversion specification performs a type substitution from
 // `StrFormat()`'s other arguments. See the comments for `FormatSpec` for full
-// information on the makeup of this format std::string.
+// information on the makeup of this format string.
 //
 // Example:
 //
-//   std::string s = absl::StrFormat(
+//   string s = absl::StrFormat(
 //       "Welcome to %s, Number %d!", "The Village", 6);
 //   EXPECT_EQ("Welcome to The Village, Number 6!", s);
 //
-// Returns an empty std::string in case of error.
+// Returns an empty string in case of error.
 template <typename... Args>
 ABSL_MUST_USE_RESULT std::string StrFormat(const FormatSpec<Args...>& format,
                                       const Args&... args) {
@@ -305,13 +305,13 @@ ABSL_MUST_USE_RESULT std::string StrFormat(const FormatSpec<Args...>& format,
 
 // StrAppendFormat()
 //
-// Appends to a `dst` std::string given a format std::string, and zero or more additional
+// Appends to a `dst` string given a format string, and zero or more additional
 // arguments, returning `*dst` as a convenience for chaining purposes. Appends
 // nothing in case of error (but possibly alters its capacity).
 //
 // Example:
 //
-//   std::string orig("For example PI is approximately ");
+//   string orig("For example PI is approximately ");
 //   std::cout << StrAppendFormat(&orig, "%12.6f", 3.14);
 template <typename... Args>
 std::string& StrAppendFormat(std::string* dst, const FormatSpec<Args...>& format,
@@ -323,7 +323,7 @@ std::string& StrAppendFormat(std::string* dst, const FormatSpec<Args...>& format
 
 // StreamFormat()
 //
-// Writes to an output stream given a format std::string and zero or more arguments,
+// Writes to an output stream given a format string and zero or more arguments,
 // generally in a manner that is more efficient than streaming the result of
 // `absl:: StrFormat()`. The returned object must be streamed before the full
 // expression ends.
@@ -341,7 +341,7 @@ ABSL_MUST_USE_RESULT str_format_internal::Streamable StreamFormat(
 
 // PrintF()
 //
-// Writes to stdout given a format std::string and zero or more arguments. This
+// Writes to stdout given a format string and zero or more arguments. This
 // function is functionally equivalent to `std::printf()` (and type-safe);
 // prefer `absl::PrintF()` over `std::printf()`.
 //
@@ -361,7 +361,7 @@ int PrintF(const FormatSpec<Args...>& format, const Args&... args) {
 
 // FPrintF()
 //
-// Writes to a file given a format std::string and zero or more arguments. This
+// Writes to a file given a format string and zero or more arguments. This
 // function is functionally equivalent to `std::fprintf()` (and type-safe);
 // prefer `absl::FPrintF()` over `std::fprintf()`.
 //
@@ -382,7 +382,7 @@ int FPrintF(std::FILE* output, const FormatSpec<Args...>& format,
 
 // SNPrintF()
 //
-// Writes to a sized buffer given a format std::string and zero or more arguments.
+// Writes to a sized buffer given a format string and zero or more arguments.
 // This function is functionally equivalent to `std::snprintf()` (and
 // type-safe); prefer `absl::SNPrintF()` over `std::snprintf()`.
 //
@@ -430,14 +430,14 @@ class FormatRawSink {
 
 // Format()
 //
-// Writes a formatted std::string to an arbitrary sink object (implementing the
-// `absl::FormatRawSink` interface), using a format std::string and zero or more
+// Writes a formatted string to an arbitrary sink object (implementing the
+// `absl::FormatRawSink` interface), using a format string and zero or more
 // additional arguments.
 //
 // By default, `string` and `std::ostream` are supported as destination objects.
 //
 // `absl::Format()` is a generic version of `absl::StrFormat(), for custom
-// sinks. The format std::string, like format strings for `StrFormat()`, is checked
+// sinks. The format string, like format strings for `StrFormat()`, is checked
 // at compile-time.
 //
 // On failure, this function returns `false` and the state of the sink is
@@ -463,13 +463,13 @@ using FormatArg = str_format_internal::FormatArgImpl;
 
 // FormatUntyped()
 //
-// Writes a formatted std::string to an arbitrary sink object (implementing the
+// Writes a formatted string to an arbitrary sink object (implementing the
 // `absl::FormatRawSink` interface), using an `UntypedFormatSpec` and zero or
 // more additional arguments.
 //
 // This function acts as the most generic formatting function in the
 // `str_format` library. The caller provides a raw sink, an unchecked format
-// std::string, and (usually) a runtime specified list of arguments; no compile-time
+// string, and (usually) a runtime specified list of arguments; no compile-time
 // checking of formatting is performed within this function. As a result, a
 // caller should check the return value to verify that no error occurred.
 // On failure, this function returns `false` and the state of the sink is
@@ -483,9 +483,9 @@ using FormatArg = str_format_internal::FormatArgImpl;
 //
 // Example:
 //
-//   std::optional<std::string> FormatDynamic(const std::string& in_format,
-//                                       const vector<std::string>& in_args) {
-//     std::string out;
+//   std::optional<string> FormatDynamic(const string& in_format,
+//                                       const vector<string>& in_args) {
+//     string out;
 //     std::vector<absl::FormatArg> args;
 //     for (const auto& v : in_args) {
 //       // It is important that 'v' is a reference to the objects in in_args.
diff --git a/absl/strings/str_join.h b/absl/strings/str_join.h
index b0680e83fe..f9611ad3b4 100644
--- a/absl/strings/str_join.h
+++ b/absl/strings/str_join.h
@@ -18,10 +18,10 @@
 // -----------------------------------------------------------------------------
 //
 // This header file contains functions for joining a range of elements and
-// returning the result as a std::string. StrJoin operations are specified by passing
-// a range, a separator std::string to use between the elements joined, and an
+// returning the result as a string. StrJoin operations are specified by passing
+// a range, a separator string to use between the elements joined, and an
 // optional Formatter responsible for converting each argument in the range to a
-// std::string. If omitted, a default `AlphaNumFormatter()` is called on the elements
+// string. If omitted, a default `AlphaNumFormatter()` is called on the elements
 // to be joined, using the same formatting that `absl::StrCat()` uses. This
 // package defines a number of default formatters, and you can define your own
 // implementations.
@@ -29,7 +29,7 @@
 // Ranges are specified by passing a container with `std::begin()` and
 // `std::end()` iterators, container-specific `begin()` and `end()` iterators, a
 // brace-initialized `std::initializer_list`, or a `std::tuple` of heterogeneous
-// objects. The separator std::string is specified as an `absl::string_view`.
+// objects. The separator string is specified as an `absl::string_view`.
 //
 // Because the default formatter uses the `absl::AlphaNum` class,
 // `absl::StrJoin()`, like `absl::StrCat()`, will work out-of-the-box on
@@ -37,8 +37,8 @@
 //
 // Example:
 //
-//   std::vector<std::string> v = {"foo", "bar", "baz"};
-//   std::string s = absl::StrJoin(v, "-");
+//   std::vector<string> v = {"foo", "bar", "baz"};
+//   string s = absl::StrJoin(v, "-");
 //   EXPECT_EQ("foo-bar-baz", s);
 //
 // See comments on the `absl::StrJoin()` function for more examples.
@@ -66,16 +66,16 @@ namespace absl {
 // -----------------------------------------------------------------------------
 //
 // A Formatter is a function object that is responsible for formatting its
-// argument as a std::string and appending it to a given output std::string. Formatters
+// argument as a string and appending it to a given output string. Formatters
 // may be implemented as function objects, lambdas, or normal functions. You may
 // provide your own Formatter to enable `absl::StrJoin()` to work with arbitrary
 // types.
 //
 // The following is an example of a custom Formatter that simply uses
-// `std::to_string()` to format an integer as a std::string.
+// `std::to_string()` to format an integer as a string.
 //
 //   struct MyFormatter {
-//     void operator()(std::string* out, int i) const {
+//     void operator()(string* out, int i) const {
 //       out->append(std::to_string(i));
 //     }
 //   };
@@ -84,7 +84,7 @@ namespace absl {
 // argument to `absl::StrJoin()`:
 //
 //   std::vector<int> v = {1, 2, 3, 4};
-//   std::string s = absl::StrJoin(v, "-", MyFormatter());
+//   string s = absl::StrJoin(v, "-", MyFormatter());
 //   EXPECT_EQ("1-2-3-4", s);
 //
 // The following standard formatters are provided within this file:
@@ -156,10 +156,10 @@ DereferenceFormatter() {
 // StrJoin()
 // -----------------------------------------------------------------------------
 //
-// Joins a range of elements and returns the result as a std::string.
-// `absl::StrJoin()` takes a range, a separator std::string to use between the
+// Joins a range of elements and returns the result as a string.
+// `absl::StrJoin()` takes a range, a separator string to use between the
 // elements joined, and an optional Formatter responsible for converting each
-// argument in the range to a std::string.
+// argument in the range to a string.
 //
 // If omitted, the default `AlphaNumFormatter()` is called on the elements to be
 // joined.
@@ -167,22 +167,22 @@ DereferenceFormatter() {
 // Example 1:
 //   // Joins a collection of strings. This pattern also works with a collection
 //   // of `absl::string_view` or even `const char*`.
-//   std::vector<std::string> v = {"foo", "bar", "baz"};
-//   std::string s = absl::StrJoin(v, "-");
+//   std::vector<string> v = {"foo", "bar", "baz"};
+//   string s = absl::StrJoin(v, "-");
 //   EXPECT_EQ("foo-bar-baz", s);
 //
 // Example 2:
 //   // Joins the values in the given `std::initializer_list<>` specified using
 //   // brace initialization. This pattern also works with an initializer_list
 //   // of ints or `absl::string_view` -- any `AlphaNum`-compatible type.
-//   std::string s = absl::StrJoin({"foo", "bar", "baz"}, "-");
+//   string s = absl::StrJoin({"foo", "bar", "baz"}, "-");
 //   EXPECT_EQ("foo-bar-baz", s);
 //
 // Example 3:
 //   // Joins a collection of ints. This pattern also works with floats,
 //   // doubles, int64s -- any `StrCat()`-compatible type.
 //   std::vector<int> v = {1, 2, 3, -4};
-//   std::string s = absl::StrJoin(v, "-");
+//   string s = absl::StrJoin(v, "-");
 //   EXPECT_EQ("1-2-3--4", s);
 //
 // Example 4:
@@ -193,7 +193,7 @@ DereferenceFormatter() {
 //   // `std::vector<int*>`.
 //   int x = 1, y = 2, z = 3;
 //   std::vector<int*> v = {&x, &y, &z};
-//   std::string s = absl::StrJoin(v, "-");
+//   string s = absl::StrJoin(v, "-");
 //   EXPECT_EQ("1-2-3", s);
 //
 // Example 5:
@@ -202,42 +202,42 @@ DereferenceFormatter() {
 //   v.emplace_back(new int(1));
 //   v.emplace_back(new int(2));
 //   v.emplace_back(new int(3));
-//   std::string s = absl::StrJoin(v, "-");
+//   string s = absl::StrJoin(v, "-");
 //   EXPECT_EQ("1-2-3", s);
 //
 // Example 6:
 //   // Joins a `std::map`, with each key-value pair separated by an equals
 //   // sign. This pattern would also work with, say, a
 //   // `std::vector<std::pair<>>`.
-//   std::map<std::string, int> m = {
+//   std::map<string, int> m = {
 //       std::make_pair("a", 1),
 //       std::make_pair("b", 2),
 //       std::make_pair("c", 3)};
-//   std::string s = absl::StrJoin(m, ",", absl::PairFormatter("="));
+//   string s = absl::StrJoin(m, ",", absl::PairFormatter("="));
 //   EXPECT_EQ("a=1,b=2,c=3", s);
 //
 // Example 7:
 //   // These examples show how `absl::StrJoin()` handles a few common edge
 //   // cases:
-//   std::vector<std::string> v_empty;
+//   std::vector<string> v_empty;
 //   EXPECT_EQ("", absl::StrJoin(v_empty, "-"));
 //
-//   std::vector<std::string> v_one_item = {"foo"};
+//   std::vector<string> v_one_item = {"foo"};
 //   EXPECT_EQ("foo", absl::StrJoin(v_one_item, "-"));
 //
-//   std::vector<std::string> v_empty_string = {""};
+//   std::vector<string> v_empty_string = {""};
 //   EXPECT_EQ("", absl::StrJoin(v_empty_string, "-"));
 //
-//   std::vector<std::string> v_one_item_empty_string = {"a", ""};
+//   std::vector<string> v_one_item_empty_string = {"a", ""};
 //   EXPECT_EQ("a-", absl::StrJoin(v_one_item_empty_string, "-"));
 //
-//   std::vector<std::string> v_two_empty_string = {"", ""};
+//   std::vector<string> v_two_empty_string = {"", ""};
 //   EXPECT_EQ("-", absl::StrJoin(v_two_empty_string, "-"));
 //
 // Example 8:
 //   // Joins a `std::tuple<T...>` of heterogeneous types, converting each to
-//   // a std::string using the `absl::AlphaNum` class.
-//   std::string s = absl::StrJoin(std::make_tuple(123, "abc", 0.456), "-");
+//   // a string using the `absl::AlphaNum` class.
+//   string s = absl::StrJoin(std::make_tuple(123, "abc", 0.456), "-");
 //   EXPECT_EQ("123-abc-0.456", s);
 
 template <typename Iterator, typename Formatter>
diff --git a/absl/strings/str_replace.h b/absl/strings/str_replace.h
index f4d9bb9545..b0f9d4367d 100644
--- a/absl/strings/str_replace.h
+++ b/absl/strings/str_replace.h
@@ -17,19 +17,19 @@
 // File: str_replace.h
 // -----------------------------------------------------------------------------
 //
-// This file defines `absl::StrReplaceAll()`, a general-purpose std::string
+// This file defines `absl::StrReplaceAll()`, a general-purpose string
 // replacement function designed for large, arbitrary text substitutions,
 // especially on strings which you are receiving from some other system for
 // further processing (e.g. processing regular expressions, escaping HTML
 // entities, etc. `StrReplaceAll` is designed to be efficient even when only
 // one substitution is being performed, or when substitution is rare.
 //
-// If the std::string being modified is known at compile-time, and the substitutions
+// If the string being modified is known at compile-time, and the substitutions
 // vary, `absl::Substitute()` may be a better choice.
 //
 // Example:
 //
-// std::string html_escaped = absl::StrReplaceAll(user_input, {
+// string html_escaped = absl::StrReplaceAll(user_input, {
 //                                           {"&", "&amp;"},
 //                                           {"<", "&lt;"},
 //                                           {">", "&gt;"},
@@ -49,16 +49,16 @@ namespace absl {
 
 // StrReplaceAll()
 //
-// Replaces character sequences within a given std::string with replacements provided
+// Replaces character sequences within a given string with replacements provided
 // within an initializer list of key/value pairs. Candidate replacements are
-// considered in order as they occur within the std::string, with earlier matches
+// considered in order as they occur within the string, with earlier matches
 // taking precedence, and longer matches taking precedence for candidates
-// starting at the same position in the std::string. Once a substitution is made, the
+// starting at the same position in the string. Once a substitution is made, the
 // replaced text is not considered for any further substitutions.
 //
 // Example:
 //
-//   std::string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
+//   string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
 //                                  {{"$count", absl::StrCat(5)},
 //                                   {"$who", "Bob"},
 //                                   {"#Noun", "Apples"}});
@@ -78,28 +78,28 @@ ABSL_MUST_USE_RESULT std::string StrReplaceAll(
 //   replacements["$who"] = "Bob";
 //   replacements["$count"] = "5";
 //   replacements["#Noun"] = "Apples";
-//   std::string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
+//   string s = absl::StrReplaceAll("$who bought $count #Noun. Thanks $who!",
 //                                  replacements);
 //   EXPECT_EQ("Bob bought 5 Apples. Thanks Bob!", s);
 //
 //   // A std::vector of std::pair elements can be more efficient.
-//   std::vector<std::pair<const absl::string_view, std::string>> replacements;
+//   std::vector<std::pair<const absl::string_view, string>> replacements;
 //   replacements.push_back({"&", "&amp;"});
 //   replacements.push_back({"<", "&lt;"});
 //   replacements.push_back({">", "&gt;"});
-//   std::string s = absl::StrReplaceAll("if (ptr < &foo)",
+//   string s = absl::StrReplaceAll("if (ptr < &foo)",
 //                                  replacements);
 //   EXPECT_EQ("if (ptr &lt; &amp;foo)", s);
 template <typename StrToStrMapping>
 std::string StrReplaceAll(absl::string_view s, const StrToStrMapping& replacements);
 
 // Overload of `StrReplaceAll()` to replace character sequences within a given
-// output std::string *in place* with replacements provided within an initializer
+// output string *in place* with replacements provided within an initializer
 // list of key/value pairs, returning the number of substitutions that occurred.
 //
 // Example:
 //
-//   std::string s = std::string("$who bought $count #Noun. Thanks $who!");
+//   string s = std::string("$who bought $count #Noun. Thanks $who!");
 //   int count;
 //   count = absl::StrReplaceAll({{"$count", absl::StrCat(5)},
 //                               {"$who", "Bob"},
@@ -112,12 +112,12 @@ int StrReplaceAll(
     std::string* target);
 
 // Overload of `StrReplaceAll()` to replace patterns within a given output
-// std::string *in place* with replacements provided within a container of key/value
+// string *in place* with replacements provided within a container of key/value
 // pairs.
 //
 // Example:
 //
-//   std::string s = std::string("if (ptr < &foo)");
+//   string s = std::string("if (ptr < &foo)");
 //   int count = absl::StrReplaceAll({{"&", "&amp;"},
 //                                    {"<", "&lt;"},
 //                                    {">", "&gt;"}}, &s);
diff --git a/absl/strings/str_replace_benchmark.cc b/absl/strings/str_replace_benchmark.cc
index e608de8d19..8386f2e6bf 100644
--- a/absl/strings/str_replace_benchmark.cc
+++ b/absl/strings/str_replace_benchmark.cc
@@ -38,16 +38,16 @@ struct Replacement {
     {"liquor", "shakes"},    //
 };
 
-// Here, we set up a std::string for use in global-replace benchmarks.
+// Here, we set up a string for use in global-replace benchmarks.
 // We started with a million blanks, and then deterministically insert
-// 10,000 copies each of two pangrams.  The result is a std::string that is
+// 10,000 copies each of two pangrams.  The result is a string that is
 // 40% blank space and 60% these words.  'the' occurs 18,247 times and
 // all the substitutions together occur 49,004 times.
 //
-// We then create "after_replacing_the" to be a std::string that is a result of
+// We then create "after_replacing_the" to be a string that is a result of
 // replacing "the" with "box" in big_string.
 //
-// And then we create "after_replacing_many" to be a std::string that is result
+// And then we create "after_replacing_many" to be a string that is result
 // of preferring several substitutions.
 void SetUpStrings() {
   if (big_string == nullptr) {
diff --git a/absl/strings/str_split.h b/absl/strings/str_split.h
index 9a7be2b053..4cfba8d0fd 100644
--- a/absl/strings/str_split.h
+++ b/absl/strings/str_split.h
@@ -19,13 +19,13 @@
 //
 // This file contains functions for splitting strings. It defines the main
 // `StrSplit()` function, several delimiters for determining the boundaries on
-// which to split the std::string, and predicates for filtering delimited results.
+// which to split the string, and predicates for filtering delimited results.
 // `StrSplit()` adapts the returned collection to the type specified by the
 // caller.
 //
 // Example:
 //
-//   // Splits the given std::string on commas. Returns the results in a
+//   // Splits the given string on commas. Returns the results in a
 //   // vector of strings.
 //   std::vector<std::string> v = absl::StrSplit("a,b,c", ',');
 //   // Can also use ","
@@ -55,7 +55,7 @@ namespace absl {
 //------------------------------------------------------------------------------
 //
 // `StrSplit()` uses delimiters to define the boundaries between elements in the
-// provided input. Several `Delimiter` types are defined below. If a std::string
+// provided input. Several `Delimiter` types are defined below. If a string
 // (`const char*`, `std::string`, or `absl::string_view`) is passed in place of
 // an explicit `Delimiter` object, `StrSplit()` treats it the same way as if it
 // were passed a `ByString` delimiter.
@@ -65,7 +65,7 @@ namespace absl {
 //
 // The following `Delimiter` types are available for use within `StrSplit()`:
 //
-//   - `ByString` (default for std::string arguments)
+//   - `ByString` (default for string arguments)
 //   - `ByChar` (default for a char argument)
 //   - `ByAnyChar`
 //   - `ByLength`
@@ -76,15 +76,15 @@ namespace absl {
 // be split and the position to begin searching for the next delimiter in the
 // input text. The returned absl::string_view should refer to the next
 // occurrence (after pos) of the represented delimiter; this returned
-// absl::string_view represents the next location where the input std::string should
+// absl::string_view represents the next location where the input string should
 // be broken. The returned absl::string_view may be zero-length if the Delimiter
-// does not represent a part of the std::string (e.g., a fixed-length delimiter). If
+// does not represent a part of the string (e.g., a fixed-length delimiter). If
 // no delimiter is found in the given text, a zero-length absl::string_view
 // referring to text.end() should be returned (e.g.,
 // absl::string_view(text.end(), 0)). It is important that the returned
 // absl::string_view always be within the bounds of input text given as an
-// argument--it must not refer to a std::string that is physically located outside of
-// the given std::string.
+// argument--it must not refer to a string that is physically located outside of
+// the given string.
 //
 // The following example is a simple Delimiter object that is created with a
 // single char and will look for that char in the text passed to the Find()
@@ -104,13 +104,13 @@ namespace absl {
 
 // ByString
 //
-// A sub-std::string delimiter. If `StrSplit()` is passed a std::string in place of a
-// `Delimiter` object, the std::string will be implicitly converted into a
+// A sub-string delimiter. If `StrSplit()` is passed a string in place of a
+// `Delimiter` object, the string will be implicitly converted into a
 // `ByString` delimiter.
 //
 // Example:
 //
-//   // Because a std::string literal is converted to an `absl::ByString`,
+//   // Because a string literal is converted to an `absl::ByString`,
 //   // the following two splits are equivalent.
 //
 //   std::vector<std::string> v1 = absl::StrSplit("a, b, c", ", ");
@@ -131,7 +131,7 @@ class ByString {
 // ByChar
 //
 // A single character delimiter. `ByChar` is functionally equivalent to a
-// 1-char std::string within a `ByString` delimiter, but slightly more
+// 1-char string within a `ByString` delimiter, but slightly more
 // efficient.
 //
 // Example:
@@ -164,9 +164,9 @@ class ByChar {
 // ByAnyChar
 //
 // A delimiter that will match any of the given byte-sized characters within
-// its provided std::string.
+// its provided string.
 //
-// Note: this delimiter works with single-byte std::string data, but does not work
+// Note: this delimiter works with single-byte string data, but does not work
 // with variable-width encodings, such as UTF-8.
 //
 // Example:
@@ -175,8 +175,8 @@ class ByChar {
 //   std::vector<std::string> v = absl::StrSplit("a,b=c", ByAnyChar(",="));
 //   // v[0] == "a", v[1] == "b", v[2] == "c"
 //
-// If `ByAnyChar` is given the empty std::string, it behaves exactly like
-// `ByString` and matches each individual character in the input std::string.
+// If `ByAnyChar` is given the empty string, it behaves exactly like
+// `ByString` and matches each individual character in the input string.
 //
 class ByAnyChar {
  public:
@@ -192,7 +192,7 @@ class ByAnyChar {
 // A delimiter for splitting into equal-length strings. The length argument to
 // the constructor must be greater than 0.
 //
-// Note: this delimiter works with single-byte std::string data, but does not work
+// Note: this delimiter works with single-byte string data, but does not work
 // with variable-width encodings, such as UTF-8.
 //
 // Example:
@@ -202,7 +202,7 @@ class ByAnyChar {
 
 //   // v[0] == "123", v[1] == "456", v[2] == "789"
 //
-// Note that the std::string does not have to be a multiple of the fixed split
+// Note that the string does not have to be a multiple of the fixed split
 // length. In such a case, the last substring will be shorter.
 //
 //   using absl::ByLength;
@@ -223,9 +223,9 @@ namespace strings_internal {
 // A traits-like metafunction for selecting the default Delimiter object type
 // for a particular Delimiter type. The base case simply exposes type Delimiter
 // itself as the delimiter's Type. However, there are specializations for
-// std::string-like objects that map them to the ByString delimiter object.
+// string-like objects that map them to the ByString delimiter object.
 // This allows functions like absl::StrSplit() and absl::MaxSplits() to accept
-// std::string-like objects (e.g., ',') as delimiter arguments but they will be
+// string-like objects (e.g., ',') as delimiter arguments but they will be
 // treated as if a ByString delimiter was given.
 template <typename Delimiter>
 struct SelectDelimiter {
@@ -331,7 +331,7 @@ struct AllowEmpty {
 // SkipEmpty()
 //
 // Returns `false` if the given `absl::string_view` is empty, indicating that
-// `StrSplit()` should omit the empty std::string.
+// `StrSplit()` should omit the empty string.
 //
 // Example:
 //
@@ -339,7 +339,7 @@ struct AllowEmpty {
 //
 //   // v[0] == "a", v[1] == "b"
 //
-// Note: `SkipEmpty()` does not consider a std::string containing only whitespace
+// Note: `SkipEmpty()` does not consider a string containing only whitespace
 // to be empty. To skip such whitespace as well, use the `SkipWhitespace()`
 // predicate.
 struct SkipEmpty {
@@ -349,7 +349,7 @@ struct SkipEmpty {
 // SkipWhitespace()
 //
 // Returns `false` if the given `absl::string_view` is empty *or* contains only
-// whitespace, indicating that `StrSplit()` should omit the std::string.
+// whitespace, indicating that `StrSplit()` should omit the string.
 //
 // Example:
 //
@@ -373,7 +373,7 @@ struct SkipWhitespace {
 
 // StrSplit()
 //
-// Splits a given std::string based on the provided `Delimiter` object, returning the
+// Splits a given string based on the provided `Delimiter` object, returning the
 // elements within the type specified by the caller. Optionally, you may pass a
 // `Predicate` to `StrSplit()` indicating whether to include or exclude the
 // resulting element within the final result set. (See the overviews for
@@ -412,7 +412,7 @@ struct SkipWhitespace {
 //
 // The `StrSplit()` function adapts the returned collection to the collection
 // specified by the caller (e.g. `std::vector` above). The returned collections
-// may contain `string`, `absl::string_view` (in which case the original std::string
+// may contain `string`, `absl::string_view` (in which case the original string
 // being split must ensure that it outlives the collection), or any object that
 // can be explicitly created from an `absl::string_view`. This behavior works
 // for:
@@ -424,7 +424,7 @@ struct SkipWhitespace {
 // Example:
 //
 //   // The results are returned as `absl::string_view` objects. Note that we
-//   // have to ensure that the input std::string outlives any results.
+//   // have to ensure that the input string outlives any results.
 //   std::vector<absl::string_view> v = absl::StrSplit("a,b,c", ',');
 //
 //   // Stores results in a std::set<std::string>, which also performs
@@ -444,7 +444,7 @@ struct SkipWhitespace {
 //   // is provided as a series of key/value pairs. For example, the 0th element
 //   // resulting from the split will be stored as a key to the 1st element. If
 //   // an odd number of elements are resolved, the last element is paired with
-//   // a default-constructed value (e.g., empty std::string).
+//   // a default-constructed value (e.g., empty string).
 //   std::map<std::string, std::string> m = absl::StrSplit("a,b,c", ',');
 //   // m["a"] == "b", m["c"] == ""     // last component value equals ""
 //
@@ -452,14 +452,14 @@ struct SkipWhitespace {
 // elements and is not a collection type. When splitting to a `std::pair` the
 // first two split strings become the `std::pair` `.first` and `.second`
 // members, respectively. The remaining split substrings are discarded. If there
-// are less than two split substrings, the empty std::string is used for the
+// are less than two split substrings, the empty string is used for the
 // corresponding
 // `std::pair` member.
 //
 // Example:
 //
 //   // Stores first two split strings as the members in a std::pair.
-//   std::pair<std::string, std::string> p = absl::StrSplit("a,b,c", ',');
+//   std::pair<string, string> p = absl::StrSplit("a,b,c", ',');
 //   // p.first == "a", p.second == "b"       // "c" is omitted.
 //
 // The `StrSplit()` function can be used multiple times to perform more
@@ -467,9 +467,9 @@ struct SkipWhitespace {
 //
 // Example:
 //
-//   // The input std::string "a=b=c,d=e,f=,g" becomes
+//   // The input string "a=b=c,d=e,f=,g" becomes
 //   // { "a" => "b=c", "d" => "e", "f" => "", "g" => "" }
-//   std::map<std::string, std::string> m;
+//   std::map<string, string> m;
 //   for (absl::string_view sp : absl::StrSplit("a=b=c,d=e,f=,g", ',')) {
 //     m.insert(absl::StrSplit(sp, absl::MaxSplits('=', 1)));
 //   }
diff --git a/absl/strings/str_split_test.cc b/absl/strings/str_split_test.cc
index c6898863dc..557f72e9ba 100644
--- a/absl/strings/str_split_test.cc
+++ b/absl/strings/str_split_test.cc
@@ -276,7 +276,7 @@ TEST(SplitIterator, Basics) {
   EXPECT_EQ(it, end);
 }
 
-// Simple Predicate to skip a particular std::string.
+// Simple Predicate to skip a particular string.
 class Skip {
  public:
   explicit Skip(const std::string& s) : s_(s) {}
@@ -768,7 +768,7 @@ static bool IsFoundAtStartingPos(absl::string_view text, Delimiter d,
 }
 
 // Helper function for testing Delimiter objects. Returns true if the given
-// Delimiter is found in the given std::string at the given position. This function
+// Delimiter is found in the given string at the given position. This function
 // tests two cases:
 //   1. The actual text given, staring at position 0
 //   2. The text given with leading padding that should be ignored
diff --git a/absl/strings/string_view.h b/absl/strings/string_view.h
index 9610146312..9c03108b44 100644
--- a/absl/strings/string_view.h
+++ b/absl/strings/string_view.h
@@ -19,7 +19,7 @@
 //
 // This file contains the definition of the `absl::string_view` class. A
 // `string_view` points to a contiguous span of characters, often part or all of
-// another `std::string`, double-quoted std::string literal, character array, or even
+// another `std::string`, double-quoted string literal, character array, or even
 // another `string_view`.
 //
 // This `absl::string_view` abstraction is designed to be a drop-in
@@ -56,15 +56,15 @@ namespace absl {
 
 // absl::string_view
 //
-// A `string_view` provides a lightweight view into the std::string data provided by
-// a `std::string`, double-quoted std::string literal, character array, or even
-// another `string_view`. A `string_view` does *not* own the std::string to which it
+// A `string_view` provides a lightweight view into the string data provided by
+// a `std::string`, double-quoted string literal, character array, or even
+// another `string_view`. A `string_view` does *not* own the string to which it
 // points, and that data cannot be modified through the view.
 //
 // You can use `string_view` as a function or method parameter anywhere a
-// parameter can receive a double-quoted std::string literal, `const char*`,
+// parameter can receive a double-quoted string literal, `const char*`,
 // `std::string`, or another `absl::string_view` argument with no need to copy
-// the std::string data. Systematic use of `string_view` within function arguments
+// the string data. Systematic use of `string_view` within function arguments
 // reduces data copies and `strlen()` calls.
 //
 // Because of its small size, prefer passing `string_view` by value:
@@ -97,8 +97,8 @@ namespace absl {
 // `string_view` this way, it is your responsibility to ensure that the object
 // pointed to by the `string_view` outlives the `string_view`.
 //
-// A `string_view` may represent a whole std::string or just part of a std::string. For
-// example, when splitting a std::string, `std::vector<absl::string_view>` is a
+// A `string_view` may represent a whole string or just part of a string. For
+// example, when splitting a string, `std::vector<absl::string_view>` is a
 // natural data type for the output.
 //
 //
diff --git a/absl/strings/string_view_test.cc b/absl/strings/string_view_test.cc
index 3818fb207a..30d5f00be5 100644
--- a/absl/strings/string_view_test.cc
+++ b/absl/strings/string_view_test.cc
@@ -284,7 +284,7 @@ TEST(StringViewTest, ComparisonOperatorsByCharacterPosition) {
 }
 #undef COMPARE
 
-// Sadly, our users often confuse std::string::npos with absl::string_view::npos;
+// Sadly, our users often confuse string::npos with absl::string_view::npos;
 // So much so that we test here that they are the same.  They need to
 // both be unsigned, and both be the maximum-valued integer of their type.
 
@@ -812,7 +812,7 @@ TEST(StringViewTest, FrontBackSingleChar) {
 }
 
 // `std::string_view::string_view(const char*)` calls
-// `std::char_traits<char>::length(const char*)` to get the std::string length. In
+// `std::char_traits<char>::length(const char*)` to get the string length. In
 // libc++, it doesn't allow `nullptr` in the constexpr context, with the error
 // "read of dereferenced null pointer is not allowed in a constant expression".
 // At run time, the behavior of `std::char_traits::length()` on `nullptr` is
diff --git a/absl/strings/strip.h b/absl/strings/strip.h
index 2f8d21f7de..8d0d7c6bfc 100644
--- a/absl/strings/strip.h
+++ b/absl/strings/strip.h
@@ -17,7 +17,7 @@
 // File: strip.h
 // -----------------------------------------------------------------------------
 //
-// This file contains various functions for stripping substrings from a std::string.
+// This file contains various functions for stripping substrings from a string.
 #ifndef ABSL_STRINGS_STRIP_H_
 #define ABSL_STRINGS_STRIP_H_
 
@@ -33,7 +33,7 @@ namespace absl {
 
 // ConsumePrefix()
 //
-// Strips the `expected` prefix from the start of the given std::string, returning
+// Strips the `expected` prefix from the start of the given string, returning
 // `true` if the strip operation succeeded or false otherwise.
 //
 // Example:
@@ -48,7 +48,7 @@ inline bool ConsumePrefix(absl::string_view* str, absl::string_view expected) {
 }
 // ConsumeSuffix()
 //
-// Strips the `expected` suffix from the end of the given std::string, returning
+// Strips the `expected` suffix from the end of the given string, returning
 // `true` if the strip operation succeeded or false otherwise.
 //
 // Example:
@@ -64,9 +64,9 @@ inline bool ConsumeSuffix(absl::string_view* str, absl::string_view expected) {
 
 // StripPrefix()
 //
-// Returns a view into the input std::string 'str' with the given 'prefix' removed,
-// but leaving the original std::string intact. If the prefix does not match at the
-// start of the std::string, returns the original std::string instead.
+// Returns a view into the input string 'str' with the given 'prefix' removed,
+// but leaving the original string intact. If the prefix does not match at the
+// start of the string, returns the original string instead.
 ABSL_MUST_USE_RESULT inline absl::string_view StripPrefix(
     absl::string_view str, absl::string_view prefix) {
   if (absl::StartsWith(str, prefix)) str.remove_prefix(prefix.size());
@@ -75,9 +75,9 @@ ABSL_MUST_USE_RESULT inline absl::string_view StripPrefix(
 
 // StripSuffix()
 //
-// Returns a view into the input std::string 'str' with the given 'suffix' removed,
-// but leaving the original std::string intact. If the suffix does not match at the
-// end of the std::string, returns the original std::string instead.
+// Returns a view into the input string 'str' with the given 'suffix' removed,
+// but leaving the original string intact. If the suffix does not match at the
+// end of the string, returns the original string instead.
 ABSL_MUST_USE_RESULT inline absl::string_view StripSuffix(
     absl::string_view str, absl::string_view suffix) {
   if (absl::EndsWith(str, suffix)) str.remove_suffix(suffix.size());
diff --git a/absl/strings/strip_test.cc b/absl/strings/strip_test.cc
index 205c160c19..40c4c60712 100644
--- a/absl/strings/strip_test.cc
+++ b/absl/strings/strip_test.cc
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// This file contains functions that remove a defined part from the std::string,
-// i.e., strip the std::string.
+// This file contains functions that remove a defined part from the string,
+// i.e., strip the string.
 
 #include "absl/strings/strip.h"
 
diff --git a/absl/strings/substitute.h b/absl/strings/substitute.h
index c4b25ba709..4de7b4e75f 100644
--- a/absl/strings/substitute.h
+++ b/absl/strings/substitute.h
@@ -17,46 +17,46 @@
 // File: substitute.h
 // -----------------------------------------------------------------------------
 //
-// This package contains functions for efficiently performing std::string
-// substitutions using a format std::string with positional notation:
+// This package contains functions for efficiently performing string
+// substitutions using a format string with positional notation:
 // `Substitute()` and `SubstituteAndAppend()`.
 //
 // Unlike printf-style format specifiers, `Substitute()` functions do not need
 // to specify the type of the substitution arguments. Supported arguments
-// following the format std::string, such as strings, string_views, ints,
+// following the format string, such as strings, string_views, ints,
 // floats, and bools, are automatically converted to strings during the
 // substitution process. (See below for a full list of supported types.)
 //
 // `Substitute()` does not allow you to specify *how* to format a value, beyond
-// the default conversion to std::string. For example, you cannot format an integer
+// the default conversion to string. For example, you cannot format an integer
 // in hex.
 //
-// The format std::string uses positional identifiers indicated by a dollar sign ($)
+// The format string uses positional identifiers indicated by a dollar sign ($)
 // and single digit positional ids to indicate which substitution arguments to
-// use at that location within the format std::string.
+// use at that location within the format string.
 //
 // Example 1:
-//   std::string s = Substitute("$1 purchased $0 $2. Thanks $1!",
+//   string s = Substitute("$1 purchased $0 $2. Thanks $1!",
 //                         5, "Bob", "Apples");
 //   EXPECT_EQ("Bob purchased 5 Apples. Thanks Bob!", s);
 //
 // Example 2:
-//   std::string s = "Hi. ";
+//   string s = "Hi. ";
 //   SubstituteAndAppend(&s, "My name is $0 and I am $1 years old.", "Bob", 5);
 //   EXPECT_EQ("Hi. My name is Bob and I am 5 years old.", s);
 //
 //
 // Supported types:
-//   * absl::string_view, std::string, const char* (null is equivalent to "")
+//   * absl::string_view, string, const char* (null is equivalent to "")
 //   * int32_t, int64_t, uint32_t, uint64
 //   * float, double
 //   * bool (Printed as "true" or "false")
-//   * pointer types other than char* (Printed as "0x<lower case hex std::string>",
+//   * pointer types other than char* (Printed as "0x<lower case hex string>",
 //     except that null is printed as "NULL")
 //
-// If an invalid format std::string is provided, Substitute returns an empty std::string
-// and SubstituteAndAppend does not change the provided output std::string.
-// A format std::string is invalid if it:
+// If an invalid format string is provided, Substitute returns an empty string
+// and SubstituteAndAppend does not change the provided output string.
+// A format string is invalid if it:
 //   * ends in an unescaped $ character,
 //     e.g. "Hello $", or
 //   * calls for a position argument which is not provided,
@@ -88,7 +88,7 @@ namespace substitute_internal {
 //
 // This class provides an argument type for `absl::Substitute()` and
 // `absl::SubstituteAndAppend()`. `Arg` handles implicit conversion of various
-// types to a std::string. (`Arg` is very similar to the `AlphaNum` class in
+// types to a string. (`Arg` is very similar to the `AlphaNum` class in
 // `StrCat()`.)
 //
 // This class has implicit constructors.
@@ -197,8 +197,8 @@ constexpr int PlaceholderBitmask(const char* format) {
 
 // SubstituteAndAppend()
 //
-// Substitutes variables into a given format std::string and appends to a given
-// output std::string. See file comments above for usage.
+// Substitutes variables into a given format string and appends to a given
+// output string. See file comments above for usage.
 //
 // The declarations of `SubstituteAndAppend()` below consist of overloads
 // for passing 0 to 10 arguments, respectively.
@@ -444,7 +444,7 @@ void SubstituteAndAppend(
 
 // Substitute()
 //
-// Substitutes variables into a given format std::string. See file comments above
+// Substitutes variables into a given format string. See file comments above
 // for usage.
 //
 // The declarations of `Substitute()` below consist of overloads for passing 0
@@ -456,7 +456,7 @@ void SubstituteAndAppend(
 // Example:
 //  template <typename... Args>
 //  void VarMsg(absl::string_view format, const Args&... args) {
-//    std::string s = absl::Substitute(format, args...);
+//    string s = absl::Substitute(format, args...);
 
 ABSL_MUST_USE_RESULT inline std::string Substitute(absl::string_view format) {
   std::string result;
diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc
index e6525046be..af1a5e4e97 100644
--- a/absl/synchronization/mutex.cc
+++ b/absl/synchronization/mutex.cc
@@ -298,7 +298,7 @@ static struct SynchEvent {     // this is a trivial hash table for the events
 // set "bits" in the word there (waiting until lockbit is clear before doing
 // so), and return a refcounted reference that will remain valid until
 // UnrefSynchEvent() is called.  If a new SynchEvent is allocated,
-// the std::string name is copied into it.
+// the string name is copied into it.
 // When used with a mutex, the caller should also ensure that kMuEvent
 // is set in the mutex word, and similarly for condition variables and kCVEvent.
 static SynchEvent *EnsureSynchEvent(std::atomic<intptr_t> *addr,
@@ -1827,8 +1827,8 @@ bool Mutex::LockSlowWithDeadline(MuHow how, const Condition *cond,
          cond == nullptr || EvalConditionAnnotated(cond, this, true, how);
 }
 
-// RAW_CHECK_FMT() takes a condition, a printf-style format std::string, and
-// the printf-style argument list.   The format std::string must be a literal.
+// RAW_CHECK_FMT() takes a condition, a printf-style format string, and
+// the printf-style argument list.   The format string must be a literal.
 // Arguments after the first are not evaluated unless the condition is true.
 #define RAW_CHECK_FMT(cond, ...)                                   \
   do {                                                             \
diff --git a/absl/synchronization/mutex.h b/absl/synchronization/mutex.h
index 83c214867a..a378190538 100644
--- a/absl/synchronization/mutex.h
+++ b/absl/synchronization/mutex.h
@@ -962,7 +962,7 @@ void RegisterMutexTracer(void (*fn)(const char *msg, const void *obj,
 //
 // The function pointer registered here will be called here on various CondVar
 // events.  The callback is given an opaque handle to the CondVar object and
-// a std::string identifying the event.  This is thread-safe, but only a single
+// a string identifying the event.  This is thread-safe, but only a single
 // tracer can be registered.
 //
 // Events that can be sent are "Wait", "Unwait", "Signal wakeup", and
diff --git a/absl/time/duration.cc b/absl/time/duration.cc
index f402137b0a..2950c7cdc6 100644
--- a/absl/time/duration.cc
+++ b/absl/time/duration.cc
@@ -666,7 +666,7 @@ std::chrono::hours ToChronoHours(Duration d) {
 }
 
 //
-// To/From std::string formatting.
+// To/From string formatting.
 //
 
 namespace {
@@ -744,7 +744,7 @@ void AppendNumberUnit(std::string* out, double n, DisplayUnit unit) {
 }  // namespace
 
 // From Go's doc at http://golang.org/pkg/time/#Duration.String
-//   [FormatDuration] returns a std::string representing the duration in the
+//   [FormatDuration] returns a string representing the duration in the
 //   form "72h3m0.5s".  Leading zero units are omitted.  As a special
 //   case, durations less than one second format use a smaller unit
 //   (milli-, micro-, or nanoseconds) to ensure that the leading digit
@@ -787,8 +787,8 @@ std::string FormatDuration(Duration d) {
 namespace {
 
 // A helper for ParseDuration() that parses a leading number from the given
-// std::string and stores the result in *int_part/*frac_part/*frac_scale.  The
-// given std::string pointer is modified to point to the first unconsumed char.
+// string and stores the result in *int_part/*frac_part/*frac_scale.  The
+// given string pointer is modified to point to the first unconsumed char.
 bool ConsumeDurationNumber(const char** dpp, int64_t* int_part,
                            int64_t* frac_part, int64_t* frac_scale) {
   *int_part = 0;
@@ -816,8 +816,8 @@ bool ConsumeDurationNumber(const char** dpp, int64_t* int_part,
 }
 
 // A helper for ParseDuration() that parses a leading unit designator (e.g.,
-// ns, us, ms, s, m, h) from the given std::string and stores the resulting unit
-// in "*unit".  The given std::string pointer is modified to point to the first
+// ns, us, ms, s, m, h) from the given string and stores the resulting unit
+// in "*unit".  The given string pointer is modified to point to the first
 // unconsumed char.
 bool ConsumeDurationUnit(const char** start, Duration* unit) {
   const char *s = *start;
@@ -850,7 +850,7 @@ bool ConsumeDurationUnit(const char** start, Duration* unit) {
 }  // namespace
 
 // From Go's doc at http://golang.org/pkg/time/#ParseDuration
-//   [ParseDuration] parses a duration std::string.  A duration std::string is
+//   [ParseDuration] parses a duration string.  A duration string is
 //   a possibly signed sequence of decimal numbers, each with optional
 //   fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m".
 //   Valid time units are "ns", "us" "ms", "s", "m", "h".
diff --git a/absl/time/format.cc b/absl/time/format.cc
index e98e60a372..ee597e407a 100644
--- a/absl/time/format.cc
+++ b/absl/time/format.cc
@@ -88,7 +88,7 @@ bool ParseTime(const std::string& format, const std::string& input, absl::Time*
   return absl::ParseTime(format, input, absl::UTCTimeZone(), time, err);
 }
 
-// If the input std::string does not contain an explicit UTC offset, interpret
+// If the input string does not contain an explicit UTC offset, interpret
 // the fields with respect to the given TimeZone.
 bool ParseTime(const std::string& format, const std::string& input, absl::TimeZone tz,
                absl::Time* time, std::string* err) {
diff --git a/absl/time/internal/cctz/include/cctz/civil_time.h b/absl/time/internal/cctz/include/cctz/civil_time.h
index 898222b4c7..0842fa4a46 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time.h
@@ -59,7 +59,7 @@ namespace cctz {
 // inferior fields to their minimum valid value (as described above). The
 // following are examples of how each of the six types would align the fields
 // representing November 22, 2015 at 12:34:56 in the afternoon. (Note: the
-// std::string format used here is not important; it's just a shorthand way of
+// string format used here is not important; it's just a shorthand way of
 // showing the six YMDHMS fields.)
 //
 //   civil_second  2015-11-22 12:34:56
diff --git a/absl/time/internal/cctz/include/cctz/time_zone.h b/absl/time/internal/cctz/include/cctz/time_zone.h
index 0b9764ea72..c86a555250 100644
--- a/absl/time/internal/cctz/include/cctz/time_zone.h
+++ b/absl/time/internal/cctz/include/cctz/time_zone.h
@@ -279,7 +279,7 @@ bool parse(const std::string&, const std::string&, const time_zone&,
 }  // namespace detail
 
 // Formats the given time_point in the given cctz::time_zone according to
-// the provided format std::string. Uses strftime()-like formatting options,
+// the provided format string. Uses strftime()-like formatting options,
 // with the following extensions:
 //
 //   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
@@ -298,7 +298,7 @@ bool parse(const std::string&, const std::string&, const time_zone&,
 // more than four characters, just like %Y.
 //
 // Tip: Format strings should include the UTC offset (e.g., %z, %Ez, or %E*z)
-// so that the resulting std::string uniquely identifies an absolute time.
+// so that the resulting string uniquely identifies an absolute time.
 //
 // Example:
 //   cctz::time_zone lax;
@@ -314,7 +314,7 @@ inline std::string format(const std::string& fmt, const time_point<D>& tp,
   return detail::format(fmt, p.first, n, tz);
 }
 
-// Parses an input std::string according to the provided format std::string and
+// Parses an input string according to the provided format string and
 // returns the corresponding time_point. Uses strftime()-like formatting
 // options, with the same extensions as cctz::format(), but with the
 // exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f. %Ez
@@ -328,7 +328,7 @@ inline std::string format(const std::string& fmt, const time_point<D>& tp,
 //
 //   "1970-01-01 00:00:00.0 +0000"
 //
-// For example, parsing a std::string of "15:45" (%H:%M) will return a time_point
+// For example, parsing a string of "15:45" (%H:%M) will return a time_point
 // that represents "1970-01-01 15:45:00.0 +0000".
 //
 // Note that parse() returns time instants, so it makes most sense to parse
diff --git a/absl/time/internal/cctz/src/time_zone_format.cc b/absl/time/internal/cctz/src/time_zone_format.cc
index 1b023848ef..d971409246 100644
--- a/absl/time/internal/cctz/src/time_zone_format.cc
+++ b/absl/time/internal/cctz/src/time_zone_format.cc
@@ -533,7 +533,7 @@ const char* ParseSubSeconds(const char* dp, detail::femtoseconds* subseconds) {
   return dp;
 }
 
-// Parses a std::string into a std::tm using strptime(3).
+// Parses a string into a std::tm using strptime(3).
 const char* ParseTM(const char* dp, const char* fmt, std::tm* tm) {
   if (dp != nullptr) {
     dp = strptime(dp, fmt, tm);
diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc
index bf73635d4c..2cb358d048 100644
--- a/absl/time/internal/cctz/src/time_zone_info.cc
+++ b/absl/time/internal/cctz/src/time_zone_info.cc
@@ -286,7 +286,7 @@ bool TimeZoneInfo::EquivTransitions(std::uint_fast8_t tt1_index,
   return true;
 }
 
-// Use the POSIX-TZ-environment-variable-style std::string to handle times
+// Use the POSIX-TZ-environment-variable-style string to handle times
 // in years after the last transition stored in the zoneinfo data.
 void TimeZoneInfo::ExtendTransitions(const std::string& name,
                                      const Header& hdr) {
diff --git a/absl/time/internal/cctz/src/time_zone_posix.h b/absl/time/internal/cctz/src/time_zone_posix.h
index 6619f27edc..9ccd4a8b68 100644
--- a/absl/time/internal/cctz/src/time_zone_posix.h
+++ b/absl/time/internal/cctz/src/time_zone_posix.h
@@ -89,7 +89,7 @@ struct PosixTransition {
   } time;
 };
 
-// The entirety of a POSIX-std::string specified time-zone rule. The standard
+// The entirety of a POSIX-string specified time-zone rule. The standard
 // abbreviation and offset are always given. If the time zone includes
 // daylight saving, then the daylight abbrevation is non-empty and the
 // remaining fields are also valid. Note that the start/end transitions
diff --git a/absl/time/time.h b/absl/time/time.h
index c41cb89c5e..d29d7e9a20 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -481,7 +481,7 @@ std::chrono::hours ToChronoHours(Duration d);
 
 // FormatDuration()
 //
-// Returns a std::string representing the duration in the form "72h3m0.5s".
+// Returns a string representing the duration in the form "72h3m0.5s".
 // Returns "inf" or "-inf" for +/- `InfiniteDuration()`.
 std::string FormatDuration(Duration d);
 
@@ -492,7 +492,7 @@ inline std::ostream& operator<<(std::ostream& os, Duration d) {
 
 // ParseDuration()
 //
-// Parses a duration std::string consisting of a possibly signed sequence of
+// Parses a duration string consisting of a possibly signed sequence of
 // decimal numbers, each with an optional fractional part and a unit
 // suffix.  The valid suffixes are "ns", "us" "ms", "s", "m", and "h".
 // Simple examples include "300ms", "-1.5h", and "2h45m".  Parses "0" as
@@ -886,7 +886,7 @@ extern const char RFC1123_no_wday[];  // %d %b %E4Y %H:%M:%S %z
 // FormatTime()
 //
 // Formats the given `absl::Time` in the `absl::TimeZone` according to the
-// provided format std::string. Uses strftime()-like formatting options, with
+// provided format string. Uses strftime()-like formatting options, with
 // the following extensions:
 //
 //   - %Ez  - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm)
@@ -913,13 +913,13 @@ extern const char RFC1123_no_wday[];  // %d %b %E4Y %H:%M:%S %z
 //   if (!absl::LoadTimeZone("America/Los_Angeles", &lax)) { ... }
 //   absl::Time t = absl::FromDateTime(2013, 1, 2, 3, 4, 5, lax);
 //
-//   std::string f = absl::FormatTime("%H:%M:%S", t, lax);  // "03:04:05"
+//   string f = absl::FormatTime("%H:%M:%S", t, lax);  // "03:04:05"
 //   f = absl::FormatTime("%H:%M:%E3S", t, lax);  // "03:04:05.000"
 //
 // Note: If the given `absl::Time` is `absl::InfiniteFuture()`, the returned
-// std::string will be exactly "infinite-future". If the given `absl::Time` is
-// `absl::InfinitePast()`, the returned std::string will be exactly "infinite-past".
-// In both cases the given format std::string and `absl::TimeZone` are ignored.
+// string will be exactly "infinite-future". If the given `absl::Time` is
+// `absl::InfinitePast()`, the returned string will be exactly "infinite-past".
+// In both cases the given format string and `absl::TimeZone` are ignored.
 //
 std::string FormatTime(const std::string& format, Time t, TimeZone tz);
 
@@ -936,7 +936,7 @@ inline std::ostream& operator<<(std::ostream& os, Time t) {
 
 // ParseTime()
 //
-// Parses an input std::string according to the provided format std::string and
+// Parses an input string according to the provided format string and
 // returns the corresponding `absl::Time`. Uses strftime()-like formatting
 // options, with the same extensions as FormatTime(), but with the
 // exceptions that %E#S is interpreted as %E*S, and %E#f as %E*f.  %Ez
@@ -950,7 +950,7 @@ inline std::ostream& operator<<(std::ostream& os, Time t) {
 //
 //   "1970-01-01 00:00:00.0 +0000"
 //
-// For example, parsing a std::string of "15:45" (%H:%M) will return an absl::Time
+// For example, parsing a string of "15:45" (%H:%M) will return an absl::Time
 // that represents "1970-01-01 15:45:00.0 +0000".
 //
 // Note that since ParseTime() returns time instants, it makes the most sense
@@ -977,15 +977,15 @@ inline std::ostream& operator<<(std::ostream& os, Time t) {
 // Errors are indicated by returning false and assigning an error message
 // to the "err" out param if it is non-null.
 //
-// Note: If the input std::string is exactly "infinite-future", the returned
+// Note: If the input string is exactly "infinite-future", the returned
 // `absl::Time` will be `absl::InfiniteFuture()` and `true` will be returned.
-// If the input std::string is "infinite-past", the returned `absl::Time` will be
+// If the input string is "infinite-past", the returned `absl::Time` will be
 // `absl::InfinitePast()` and `true` will be returned.
 //
 bool ParseTime(const std::string& format, const std::string& input, Time* time,
                std::string* err);
 
-// Like ParseTime() above, but if the format std::string does not contain a UTC
+// Like ParseTime() above, but if the format string does not contain a UTC
 // offset specification (%z/%Ez/%E*z) then the input is interpreted in the
 // given TimeZone.  This means that the input, by itself, does not identify a
 // unique instant.  Being time-zone dependent, it also admits the possibility
diff --git a/absl/types/span.h b/absl/types/span.h
index 76be819ecc..5387e8e027 100644
--- a/absl/types/span.h
+++ b/absl/types/span.h
@@ -87,7 +87,7 @@ constexpr auto GetDataImpl(C& c, char) noexcept  // NOLINT(runtime/references)
   return c.data();
 }
 
-// Before C++17, std::string::data returns a const char* in all cases.
+// Before C++17, string::data returns a const char* in all cases.
 inline char* GetDataImpl(std::string& s,  // NOLINT(runtime/references)
                          int) noexcept {
   return &s[0];
diff --git a/absl/utility/utility.h b/absl/utility/utility.h
index d73602c47d..aef4baa02d 100644
--- a/absl/utility/utility.h
+++ b/absl/utility/utility.h
@@ -235,13 +235,13 @@ auto apply_helper(Functor&& functor, Tuple&& t, index_sequence<Indexes...>)
 // Example:
 //
 //   class Foo{void Bar(int);};
-//   void user_function(int, std::string);
+//   void user_function(int, string);
 //   void user_function(std::unique_ptr<Foo>);
 //
 //   int main()
 //   {
-//       std::tuple<int, std::string> tuple1(42, "bar");
-//       // Invokes the user function overload on int, std::string.
+//       std::tuple<int, string> tuple1(42, "bar");
+//       // Invokes the user function overload on int, string.
 //       absl::apply(&user_function, tuple1);
 //
 //       auto foo = absl::make_unique<Foo>();