[libcxx-commits] [libcxx] [libc++][sstream] P2495R3: Interfacing `stringstream`s with `string_view` (PR #80552)
via libcxx-commits
libcxx-commits at lists.llvm.org
Sat Feb 3 11:49:01 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libcxx
Author: Hristo Hristov (H-G-Hristov)
<details>
<summary>Changes</summary>
Implements P2495R3 <https://wg21.link/P2495R3>
- https://eel.is/c++draft/version.syn#headerref:%3csstream%3e
- https://eel.is/c++draft/stringbuf
- https://eel.is/c++draft/stringbuf.general
- https://eel.is/c++draft/stringbuf.cons
- https://eel.is/c++draft/stringbuf.members
- https://eel.is/c++draft/istringstream
- https://eel.is/c++draft/istringstream.general
- https://eel.is/c++draft/istringstream.cons
- https://eel.is/c++draft/istringstream.members
- https://eel.is/c++draft/ostringstream
- https://eel.is/c++draft/ostringstream.general
- https://eel.is/c++draft/ostringstream.cons
- https://eel.is/c++draft/ostringstream.members
- https://eel.is/c++draft/stringstream
- https://eel.is/c++draft/stringstream.general
- https://eel.is/c++draft/stringstream.cons
- https://eel.is/c++draft/stringstream.members
References:
- https://eel.is/c++draft/string.streams
---
Patch is 100.63 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/80552.diff
31 Files Affected:
- (modified) libcxx/docs/FeatureTestMacroTable.rst (+1-1)
- (modified) libcxx/docs/ReleaseNotes/19.rst (+1)
- (modified) libcxx/docs/Status/Cxx2cPapers.csv (+1-1)
- (modified) libcxx/include/sstream (+154)
- (modified) libcxx/include/version (+1-1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx03.csv (+5)
- (modified) libcxx/test/libcxx/transitive_includes/cxx11.csv (+1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx14.csv (+1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx17.csv (+1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx20.csv (+1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx23.csv (+1)
- (modified) libcxx/test/libcxx/transitive_includes/cxx26.csv (+1)
- (added) libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.alloc.pass.cpp (+114)
- (added) libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.mode.alloc.pass.cpp (+145)
- (added) libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.mode.pass.cpp (+116)
- (added) libcxx/test/std/input.output/string.streams/istringstream/istringstream.members/str.string_view.pass.cpp (+74)
- (added) libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string_view.alloc.pass.cpp (+114)
- (added) libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string_view.mode.alloc.pass.cpp (+145)
- (added) libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string_view.mode.pass.cpp (+116)
- (added) libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.members/str.string_view.pass.cpp (+74)
- (added) libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.cons/string_view.alloc.pass.cpp (+112)
- (added) libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.cons/string_view.mode.alloc.pass.cpp (+143)
- (added) libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.cons/string_view.mode.pass.cpp (+114)
- (added) libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.members/str.string_view.pass.cpp (+73)
- (added) libcxx/test/std/input.output/string.streams/stringstream/stringstream.cons/string_view.alloc.pass.cpp (+112)
- (added) libcxx/test/std/input.output/string.streams/stringstream/stringstream.cons/string_view.mode.alloc.pass.cpp (+144)
- (added) libcxx/test/std/input.output/string.streams/stringstream/stringstream.cons/string_view.mode.pass.cpp (+115)
- (added) libcxx/test/std/input.output/string.streams/stringstream/stringstream.members/str.string_view.pass.cpp (+74)
- (modified) libcxx/test/std/language.support/support.limits/support.limits.general/sstream.version.compile.pass.cpp (+5-11)
- (modified) libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp (+5-11)
- (modified) libcxx/utils/generate_feature_test_macro_components.py (-1)
``````````diff
diff --git a/libcxx/docs/FeatureTestMacroTable.rst b/libcxx/docs/FeatureTestMacroTable.rst
index a5c6fa22cec06..5a0bbf7df0b05 100644
--- a/libcxx/docs/FeatureTestMacroTable.rst
+++ b/libcxx/docs/FeatureTestMacroTable.rst
@@ -440,7 +440,7 @@ Status
--------------------------------------------------- -----------------
``__cpp_lib_span_initializer_list`` ``202311L``
--------------------------------------------------- -----------------
- ``__cpp_lib_sstream_from_string_view`` *unimplemented*
+ ``__cpp_lib_sstream_from_string_view`` ``202306L``
--------------------------------------------------- -----------------
``__cpp_lib_submdspan`` *unimplemented*
--------------------------------------------------- -----------------
diff --git a/libcxx/docs/ReleaseNotes/19.rst b/libcxx/docs/ReleaseNotes/19.rst
index db731de2e4399..f2ca6d073d2f1 100644
--- a/libcxx/docs/ReleaseNotes/19.rst
+++ b/libcxx/docs/ReleaseNotes/19.rst
@@ -40,6 +40,7 @@ Implemented Papers
- P2637R3 - Member ``visit``
- P2652R2 - Disallow User Specialization of ``allocator_traits``
+- P2495R3 - Interfacing ``stringstream``s with ``string_view``
Improvements and New Features
diff --git a/libcxx/docs/Status/Cxx2cPapers.csv b/libcxx/docs/Status/Cxx2cPapers.csv
index a62faee4f44e2..dfc4208b5ccb5 100644
--- a/libcxx/docs/Status/Cxx2cPapers.csv
+++ b/libcxx/docs/Status/Cxx2cPapers.csv
@@ -6,7 +6,7 @@
"`P2545R4 <https://wg21.link/P2545R4>`__","LWG","Read-Copy Update (RCU)","Varna June 2023","","",""
"`P2530R3 <https://wg21.link/P2530R3>`__","LWG","Hazard Pointers for C++26","Varna June 2023","","",""
"`P2538R1 <https://wg21.link/P2538R1>`__","LWG","ADL-proof ``std::projected``","Varna June 2023","|Complete|","18.0","|ranges|"
-"`P2495R3 <https://wg21.link/P2495R3>`__","LWG","Interfacing ``stringstreams`` with ``string_view``","Varna June 2023","","",""
+"`P2495R3 <https://wg21.link/P2495R3>`__","LWG","Interfacing ``stringstream``s with ``string_view``","Varna June 2023","|Complete|","19.0",""
"`P2510R3 <https://wg21.link/P2510R3>`__","LWG","Formatting pointers","Varna June 2023","|Complete| [#note-P2510R3]_","17.0","|format|"
"`P2198R7 <https://wg21.link/P2198R7>`__","LWG","Freestanding Feature-Test Macros and Implementation-Defined Extensions","Varna June 2023","","",""
"`P2338R4 <https://wg21.link/P2338R4>`__","LWG","Freestanding Library: Character primitives and the C library","Varna June 2023","","",""
diff --git a/libcxx/include/sstream b/libcxx/include/sstream
index 6c354cf0b3973..f2be4c9bc8b1b 100644
--- a/libcxx/include/sstream
+++ b/libcxx/include/sstream
@@ -48,6 +48,13 @@ public:
template <class SAlloc>
explicit basic_stringbuf(const basic_string<char_type, traits_type, SAlloc>& s,
ios_base::openmode which = ios_base::in | ios_base::out); // C++20
+ template<class T>
+ explicit basic_stringbuf(const T& t,
+ ios_base::openmode which = ios_base::in | ios_base::out); // Since C++26
+ template<class T>
+ basic_stringbuf(const T& t, const Allocator& a); // Since C++26
+ template<class T>
+ basic_stringbuf(const T& t, ios_base::openmode which, const Allocator& a); // Since C++26
basic_stringbuf(basic_stringbuf&& rhs);
basic_stringbuf(basic_stringbuf&& rhs, const allocator_type& a); // C++20
@@ -67,6 +74,8 @@ public:
template <class SAlloc>
void str(const basic_string<char_type, traits_type, SAlloc>& s); // C++20
void str(basic_string<char_type, traits_type, allocator_type>&& s); // C++20
+ template<class T>
+ void str(const T& t); // Since C++26
protected:
// [stringbuf.virtuals] Overridden virtual functions:
@@ -119,6 +128,12 @@ public:
template <class SAlloc>
explicit basic_istringstream(const basic_string<char_type, traits_type, SAlloc>& s,
ios_base::openmode which = ios_base::in); // C++20
+ template<class T>
+ explicit basic_istringstream(const T& t, ios_base::openmode which = ios_base::in); // Since C++26
+ template<class T>
+ basic_istringstream(const T& t, const Allocator& a); // Since C++26
+ template<class T>
+ basic_istringstream(const T& t, ios_base::openmode which, const Allocator& a); // Since C++26
basic_istringstream(basic_istringstream&& rhs);
// [istringstream.assign] Assign and swap:
@@ -137,6 +152,8 @@ public:
template <class SAlloc>
void str(const basic_string<char_type, traits_type, SAlloc>& s); // C++20
void str(basic_string<char_type, traits_type, allocator_type>&& s); // C++20
+ template<class T>
+ void str(const T& t); // Since C++26
};
template <class charT, class traits, class Allocator>
@@ -178,6 +195,12 @@ public:
template <class SAlloc>
explicit basic_ostringstream(const basic_string<char_type, traits_type, SAlloc>& s,
ios_base::openmode which = ios_base::out); // C++20
+ template<class T>
+ explicit basic_ostringstream(const T& t, ios_base::openmode which = ios_base::out); // Since C++26
+ template<class T>
+ basic_ostringstream(const T& t, const Allocator& a); // Since C++26
+ template<class T>
+ basic_ostringstream(const T& t, ios_base::openmode which, const Allocator& a); // Since C++26
basic_ostringstream(basic_ostringstream&& rhs);
// [ostringstream.assign] Assign and swap:
@@ -196,6 +219,8 @@ public:
template <class SAlloc>
void str(const basic_string<char_type, traits_type, SAlloc>& s); // C++20
void str(basic_string<char_type, traits_type, allocator_type>&& s); // C++20
+ template<class T>
+ void str(const T& t); // Since C++26
};
template <class charT, class traits, class Allocator>
@@ -237,6 +262,13 @@ public:
template <class SAlloc>
explicit basic_stringstream(const basic_string<char_type, traits_type, SAlloc>& s,
ios_base::openmode which = ios_base::out | ios_base::in); // C++20
+ template<class T>
+ explicit basic_stringstream(const T& t,
+ ios_base::openmode which = ios_base::out | ios_base::in); // Since C++26
+ template<class T>
+ basic_stringstream(const T& t, const Allocator& a); // Since C++26
+ template<class T>
+ basic_stringstream(const T& t, ios_base::openmode which, const Allocator& a); // Since C++26
basic_stringstream(basic_stringstream&& rhs);
// [stringstream.assign] Assign and swap:
@@ -255,6 +287,8 @@ public:
template <class SAlloc>
void str(const basic_string<char_type, traits_type, SAlloc>& s); // C++20
void str(basic_string<char_type, traits_type, allocator_type>&& s); // C++20
+ template<class T>
+ void str(const T& t); // Since C++26
};
template <class charT, class traits, class Allocator>
@@ -274,10 +308,12 @@ typedef basic_stringstream<wchar_t> wstringstream;
#include <__availability>
#include <__config>
#include <__fwd/sstream.h>
+#include <__type_traits/is_convertible.h>
#include <__utility/swap.h>
#include <istream>
#include <ostream>
#include <string>
+#include <string_view>
#include <version>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -364,6 +400,30 @@ public:
}
#endif // _LIBCPP_STD_VER >= 20
+#if _LIBCPP_STD_VER >= 26
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI explicit basic_stringbuf(const _Tp& __t,
+ ios_base::openmode __which = ios_base::in | ios_base::out)
+ : basic_stringbuf(__t, __which, _Allocator()) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_stringbuf(const _Tp& __t, const _Allocator& __a)
+ : basic_stringbuf(__t, ios_base::in | ios_base::out, __a) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_stringbuf(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
+ : __hm_(nullptr), __mode_(__which) {
+ basic_string_view<_CharT, _Traits> __sv = __t;
+ __str_ = string_type(__sv, __a);
+ __init_buf_ptrs();
+ }
+
+#endif // _LIBCPP_STD_VER >= 26
+
basic_stringbuf(basic_stringbuf&& __rhs) : __mode_(__rhs.__mode_) { __move_init(std::move(__rhs)); }
#if _LIBCPP_STD_VER >= 20
@@ -435,6 +495,18 @@ public:
}
#endif // _LIBCPP_STD_VER >= 20
+#if _LIBCPP_STD_VER >= 26
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
+ basic_string_view<_CharT, _Traits> __sv = __t;
+ __str_ = __sv;
+ __init_buf_ptrs();
+ }
+
+#endif // _LIBCPP_STD_VER >= 26
+
protected:
// [stringbuf.virtuals] Overridden virtual functions:
int_type underflow() override;
@@ -822,6 +894,25 @@ public:
: basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::in) {}
#endif // _LIBCPP_STD_VER >= 20
+#if _LIBCPP_STD_VER >= 26
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI explicit basic_istringstream(const _Tp& __t, ios_base::openmode __which = ios_base::in)
+ : basic_istringstream(__t, __which | ios_base::in, _Allocator()) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_istringstream(const _Tp& __t, const _Allocator& __a)
+ : basic_istringstream(__t, ios_base::in, __a) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_istringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
+ : basic_istream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which | ios_base::in, __a) {}
+
+#endif // _LIBCPP_STD_VER >= 26
+
_LIBCPP_HIDE_FROM_ABI basic_istringstream(basic_istringstream&& __rhs)
: basic_istream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
basic_istream<_CharT, _Traits>::set_rdbuf(&__sb_);
@@ -871,6 +962,14 @@ public:
_LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
#endif // _LIBCPP_STD_VER >= 20
+
+#if _LIBCPP_STD_VER >= 26
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
+ rdbuf()->str(__t);
+ }
+#endif // _LIBCPP_STD_VER >= 26
};
template <class _CharT, class _Traits, class _Allocator>
@@ -929,6 +1028,25 @@ public:
: basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch | ios_base::out) {}
#endif // _LIBCPP_STD_VER >= 20
+#if _LIBCPP_STD_VER >= 26
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI explicit basic_ostringstream(const _Tp& __t, ios_base::openmode __which = ios_base::out)
+ : basic_ostringstream(__t, __which | ios_base::out, _Allocator()) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_ostringstream(const _Tp& __t, const _Allocator& __a)
+ : basic_ostringstream(__t, ios_base::out, __a) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_ostringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
+ : basic_ostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which | ios_base::out, __a) {}
+
+#endif // _LIBCPP_STD_VER >= 26
+
_LIBCPP_HIDE_FROM_ABI basic_ostringstream(basic_ostringstream&& __rhs)
: basic_ostream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
basic_ostream<_CharT, _Traits>::set_rdbuf(&__sb_);
@@ -979,6 +1097,14 @@ public:
_LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
#endif // _LIBCPP_STD_VER >= 20
+
+#if _LIBCPP_STD_VER >= 26
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
+ rdbuf()->str(__t);
+ }
+#endif // _LIBCPP_STD_VER >= 26
};
template <class _CharT, class _Traits, class _Allocator>
@@ -1040,6 +1166,26 @@ public:
: basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__s, __wch) {}
#endif // _LIBCPP_STD_VER >= 20
+#if _LIBCPP_STD_VER >= 26
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI explicit basic_stringstream(const _Tp& __t,
+ ios_base::openmode __which = ios_base::out | ios_base::in)
+ : basic_stringstream(__t, __which, _Allocator()) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_stringstream(const _Tp& __t, const _Allocator& __a)
+ : basic_stringstream(__t, ios_base::out | ios_base::in, __a) {}
+
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI basic_stringstream(const _Tp& __t, ios_base::openmode __which, const _Allocator& __a)
+ : basic_iostream<_CharT, _Traits>(std::addressof(__sb_)), __sb_(__t, __which, __a) {}
+
+#endif // _LIBCPP_STD_VER >= 26
+
_LIBCPP_HIDE_FROM_ABI basic_stringstream(basic_stringstream&& __rhs)
: basic_iostream<_CharT, _Traits>(std::move(__rhs)), __sb_(std::move(__rhs.__sb_)) {
basic_istream<_CharT, _Traits>::set_rdbuf(&__sb_);
@@ -1089,6 +1235,14 @@ public:
_LIBCPP_HIDE_FROM_ABI void str(string_type&& __s) { __sb_.str(std::move(__s)); }
#endif // _LIBCPP_STD_VER >= 20
+
+#if _LIBCPP_STD_VER >= 26
+ template <class _Tp>
+ requires is_convertible_v<const _Tp&, basic_string_view<_CharT, _Traits>>
+ _LIBCPP_HIDE_FROM_ABI void str(const _Tp& __t) {
+ rdbuf()->str(__t);
+ }
+#endif // _LIBCPP_STD_VER >= 26
};
template <class _CharT, class _Traits, class _Allocator>
diff --git a/libcxx/include/version b/libcxx/include/version
index e4dbb7bdd5fc2..4fbba978b6b0e 100644
--- a/libcxx/include/version
+++ b/libcxx/include/version
@@ -508,7 +508,7 @@ __cpp_lib_within_lifetime 202306L <type_traits>
// # define __cpp_lib_smart_ptr_owner_equality 202306L
# define __cpp_lib_span_at 202311L
# define __cpp_lib_span_initializer_list 202311L
-// # define __cpp_lib_sstream_from_string_view 202306L
+# define __cpp_lib_sstream_from_string_view 202306L
// # define __cpp_lib_submdspan 202306L
// # define __cpp_lib_text_encoding 202306L
# undef __cpp_lib_to_chars
diff --git a/libcxx/test/libcxx/transitive_includes/cxx03.csv b/libcxx/test/libcxx/transitive_includes/cxx03.csv
index d4c22023db7a0..08b2a7431c815 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx03.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx03.csv
@@ -742,6 +742,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream type_traits
sstream version
stack compare
@@ -833,13 +834,17 @@ system_error type_traits
system_error version
thread array
thread atomic
+thread cctype
thread cerrno
thread chrono
+thread clocale
thread compare
thread cstddef
thread cstdint
+thread cstdlib
thread cstring
thread ctime
+thread cwchar
thread functional
thread iosfwd
thread limits
diff --git a/libcxx/test/libcxx/transitive_includes/cxx11.csv b/libcxx/test/libcxx/transitive_includes/cxx11.csv
index 5eb839a3aa7a6..2039c60e79f03 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx11.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx11.csv
@@ -748,6 +748,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream type_traits
sstream version
stack compare
diff --git a/libcxx/test/libcxx/transitive_includes/cxx14.csv b/libcxx/test/libcxx/transitive_includes/cxx14.csv
index 7b372fb37dcd5..3d3eb2822722c 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx14.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx14.csv
@@ -750,6 +750,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream type_traits
sstream version
stack compare
diff --git a/libcxx/test/libcxx/transitive_includes/cxx17.csv b/libcxx/test/libcxx/transitive_includes/cxx17.csv
index 7b372fb37dcd5..3d3eb2822722c 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx17.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx17.csv
@@ -750,6 +750,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream type_traits
sstream version
stack compare
diff --git a/libcxx/test/libcxx/transitive_includes/cxx20.csv b/libcxx/test/libcxx/transitive_includes/cxx20.csv
index 9b4915a468d1c..557b08915ddeb 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx20.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx20.csv
@@ -755,6 +755,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream type_traits
sstream version
stack compare
diff --git a/libcxx/test/libcxx/transitive_includes/cxx23.csv b/libcxx/test/libcxx/transitive_includes/cxx23.csv
index 7c7099d176f18..61b063b08b0b2 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx23.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx23.csv
@@ -519,6 +519,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream version
stack compare
stack cstddef
diff --git a/libcxx/test/libcxx/transitive_includes/cxx26.csv b/libcxx/test/libcxx/transitive_includes/cxx26.csv
index 7c7099d176f18..61b063b08b0b2 100644
--- a/libcxx/test/libcxx/transitive_includes/cxx26.csv
+++ b/libcxx/test/libcxx/transitive_includes/cxx26.csv
@@ -519,6 +519,7 @@ sstream cstddef
sstream istream
sstream ostream
sstream string
+sstream string_view
sstream version
stack compare
stack cstddef
diff --git a/libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.alloc.pass.cpp b/libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.alloc.pass.cpp
new file mode 100644
index 0000000000000..92ec33f6a0d61
--- /dev/null
+++ b/libcxx/test/std/input.output/string.streams/istringstream/istringstream.cons/string_view.alloc.pass.cpp
@@ -0,0 +1,114 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20, c++23
+
+// <sstream>
+
+// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
+// class basic_stringstream
+
+// template<class T>
+// basic_istringstream(const T& t, const Allocator& a);
+
+#include <cassert>
+#include <concepts>
+#include <sstream>
+#include <string>
+#include <string_view>
+
+#include "make_string.h"
+#include "test_allocator.h"
+#include "test_convertible.h"
+#include "test_macros.h"
+
+template <typename CharT>
+void test_sfinae() {
+ struct SomeObject {};
+ struct NonAllocator...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/80552
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