Make to_chars/from_chars work back to C++11. This means that we can use them to implement to_string as well. Reviewed as https://reviews.llvm.org/D59598.
llvm-svn: 356585
diff --git a/libcxx/include/charconv b/libcxx/include/charconv
index ec9baa8..4e84ef6 100644
--- a/libcxx/include/charconv
+++ b/libcxx/include/charconv
@@ -96,7 +96,7 @@
_LIBCPP_FUNC_VIS char* __u32toa(uint32_t __value, char* __buffer);
}
-#if _LIBCPP_STD_VER > 11
+#ifndef _LIBCPP_CXX03_LANG
enum class _LIBCPP_ENUM_VIS chars_format
{
@@ -124,7 +124,7 @@
namespace __itoa
{
-static constexpr uint64_t __pow10_64[] = {
+static _LIBCPP_CONSTEXPR uint64_t __pow10_64[] = {
UINT64_C(0),
UINT64_C(10),
UINT64_C(100),
@@ -147,7 +147,7 @@
UINT64_C(10000000000000000000),
};
-static constexpr uint32_t __pow10_32[] = {
+static _LIBCPP_CONSTEXPR uint32_t __pow10_32[] = {
UINT32_C(0), UINT32_C(10), UINT32_C(100),
UINT32_C(1000), UINT32_C(10000), UINT32_C(100000),
UINT32_C(1000000), UINT32_C(10000000), UINT32_C(100000000),
@@ -172,7 +172,7 @@
return __u64toa(__v, __p);
}
- static _LIBCPP_INLINE_VISIBILITY auto& __pow() { return __pow10_64; }
+ static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_64)& __pow() { return __pow10_64; }
};
template <typename _Tp>
@@ -194,7 +194,7 @@
return __u32toa(__v, __p);
}
- static _LIBCPP_INLINE_VISIBILITY auto& __pow() { return __pow10_32; }
+ static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_32)& __pow() { return __pow10_32; }
};
template <typename _Tp>
@@ -239,7 +239,7 @@
template <typename _Tp>
struct _LIBCPP_HIDDEN __traits : __traits_base<_Tp>
{
- static constexpr int digits = numeric_limits<_Tp>::digits10 + 1;
+ static _LIBCPP_CONSTEXPR int digits = numeric_limits<_Tp>::digits10 + 1;
using __traits_base<_Tp>::__pow;
using typename __traits_base<_Tp>::type;
@@ -285,10 +285,10 @@
}
template <typename _Tp>
-inline _LIBCPP_INLINE_VISIBILITY auto
+inline _LIBCPP_INLINE_VISIBILITY typename make_unsigned<_Tp>::type
__to_unsigned(_Tp __x)
{
- return static_cast<make_unsigned_t<_Tp>>(__x);
+ return static_cast<typename make_unsigned<_Tp>::type>(__x);
}
template <typename _Tp>
@@ -379,14 +379,14 @@
}
}
-template <typename _Tp, enable_if_t<is_integral<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY to_chars_result
to_chars(char* __first, char* __last, _Tp __value)
{
return __to_chars_itoa(__first, __last, __value, is_signed<_Tp>());
}
-template <typename _Tp, enable_if_t<is_integral<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY to_chars_result
to_chars(char* __first, char* __last, _Tp __value, int __base)
{
@@ -501,7 +501,7 @@
return __r;
}
-template <typename _Tp, enable_if_t<is_unsigned<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value)
{
@@ -527,7 +527,7 @@
});
}
-template <typename _Tp, enable_if_t<is_signed<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value)
{
@@ -535,7 +535,7 @@
return __sign_combinator(__first, __last, __value, __from_chars_atoi<__t>);
}
-template <typename _Tp, enable_if_t<is_unsigned<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
__from_chars_integral(const char* __first, const char* __last, _Tp& __value,
int __base)
@@ -582,7 +582,7 @@
__base);
}
-template <typename _Tp, enable_if_t<is_signed<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
__from_chars_integral(const char* __first, const char* __last, _Tp& __value,
int __base)
@@ -592,14 +592,14 @@
__from_chars_integral<__t>, __base);
}
-template <typename _Tp, enable_if_t<is_integral<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
from_chars(const char* __first, const char* __last, _Tp& __value)
{
return __from_chars_atoi(__first, __last, __value);
}
-template <typename _Tp, enable_if_t<is_integral<_Tp>::value, int> = 0>
+template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
from_chars(const char* __first, const char* __last, _Tp& __value, int __base)
{
@@ -607,7 +607,7 @@
return __from_chars_integral(__first, __last, __value, __base);
}
-#endif // _LIBCPP_STD_VER > 11
+#endif // _LIBCPP_CXX03_LANG
_LIBCPP_END_NAMESPACE_STD
diff --git a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.bool.fail.cpp b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.bool.fail.cpp
index 2e744cc..ef4c236 100644
--- a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.bool.fail.cpp
+++ b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.bool.fail.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03, c++11
+// UNSUPPORTED: c++98, c++03
// <charconv>
// In
diff --git a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
index d750cb4..1b8fa71 100644
--- a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
+++ b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03, c++11
+// UNSUPPORTED: c++98, c++03
// XFAIL: with_system_cxx_lib=macosx10.14
// XFAIL: with_system_cxx_lib=macosx10.13
diff --git a/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.bool.fail.cpp b/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.bool.fail.cpp
index 5c947d1..7d8da57 100644
--- a/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.bool.fail.cpp
+++ b/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.bool.fail.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03, c++11
+// UNSUPPORTED: c++98, c++03
// <charconv>
// In
diff --git a/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp b/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
index c034151..f0bea97 100644
--- a/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
+++ b/libcxx/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03, c++11
+// UNSUPPORTED: c++98, c++03
// XFAIL: with_system_cxx_lib=macosx10.14
// XFAIL: with_system_cxx_lib=macosx10.13
diff --git a/libcxx/test/support/charconv_test_helpers.h b/libcxx/test/support/charconv_test_helpers.h
index dc704a9..f30956e 100644
--- a/libcxx/test/support/charconv_test_helpers.h
+++ b/libcxx/test/support/charconv_test_helpers.h
@@ -17,8 +17,8 @@
#include "test_macros.h"
-#if TEST_STD_VER <= 11
-#error This file requires C++14
+#if TEST_STD_VER < 11
+#error This file requires C++11
#endif
using std::false_type;
@@ -56,14 +56,14 @@
constexpr bool
_fits_in(T v, false_type, true_type /* T signed */, false_type /* X unsigned*/)
{
- return 0 <= v && std::make_unsigned_t<T>(v) <= (xl::max)();
+ return 0 <= v && typename std::make_unsigned<T>::type(v) <= (xl::max)();
}
template <typename X, typename T, typename xl = std::numeric_limits<X>>
constexpr bool
_fits_in(T v, false_type, false_type /* T unsigned */, ...)
{
- return v <= std::make_unsigned_t<X>((xl::max)());
+ return v <= typename std::make_unsigned<X>::type((xl::max)());
}
template <typename X, typename T>
@@ -119,7 +119,7 @@
}
private:
- static auto fromchars(char const* p, char const* ep, int base, true_type)
+ static long long fromchars(char const* p, char const* ep, int base, true_type)
{
char* last;
auto r = strtoll(p, &last, base);
@@ -128,7 +128,7 @@
return r;
}
- static auto fromchars(char const* p, char const* ep, int base, false_type)
+ static unsigned long long fromchars(char const* p, char const* ep, int base, false_type)
{
char* last;
auto r = strtoull(p, &last, base);
@@ -138,6 +138,7 @@
}
static auto fromchars(char const* p, char const* ep, int base = 10)
+ -> decltype(fromchars(p, ep, base, std::is_signed<X>()))
{
return fromchars(p, ep, base, std::is_signed<X>());
}