Kaydet (Commit) 7d928d8c authored tarafından Stephan Bergmann's avatar Stephan Bergmann

HAVE_CXX14_CONSTEXPR is always true now

...but for safety, leave the configure.ac check in for some longer.

o3tl::array_view::max_size (include/o3tl/array_view.hxx) and
o3tl::basic_string_view::max_size (include/o3tl/string_view.hxx) started to
produce loplugin:staticmethods warnings, which I silenced by /not/ making the
functions static.  Those classes are meant to be temporary drop-in replacements
for standard classes (std::span slated for C++20, prev. std::array_view; and
std::basic_string_view, resp.), so should have the same behavior as their
standard counterparts (and making the functions static would likely cause
loplugin:staticaccess warnings at call sites).

Change-Id: If21674dbf02886f453ca447544e37b184df5a25e
Reviewed-on: https://gerrit.libreoffice.org/64768
Tested-by: Jenkins
Reviewed-by: 's avatarStephan Bergmann <sbergman@redhat.com>
üst 74dd206e
......@@ -12,7 +12,6 @@ Any change in this header will cause a rebuild of almost everything.
#ifndef CONFIG_GLOBAL_H
#define CONFIG_GLOBAL_H
#define HAVE_CXX14_CONSTEXPR 0
#define HAVE_GCC_BUILTIN_ATOMIC 0
#define HAVE_GCC_BUILTIN_FFS 0
/* _Pragma */
......
......@@ -6347,7 +6347,8 @@ return !(i != 0 && j != 0);
AC_LANG_POP([C++])
CXXFLAGS=$save_CXXFLAGS
AC_MSG_CHECKING([whether $CXX supports C++14 constexpr])
dnl This check can eventually be removed completely (e.g., after libreoffice-6-3 branch off):
AC_MSG_CHECKING([that $CXX supports C++14 constexpr])
save_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS $CXXFLAGS_CXX11"
AC_LANG_PUSH([C++])
......@@ -6375,13 +6376,9 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
}
};
constexpr auto v2 = S{10}.f();
]])], [cxx14_constexpr=yes], [cxx14_constexpr=no])
]])], AC_MSG_RESULT([yes]), AC_MSG_ERROR([$CXX lacks required C++14 constexpr support]))
AC_LANG_POP([C++])
CXXFLAGS=$save_CXXFLAGS
AC_MSG_RESULT([$cxx14_constexpr])
if test "$cxx14_constexpr" = yes; then
AC_DEFINE([HAVE_CXX14_CONSTEXPR])
fi
dnl _Pragma support (may require C++11)
if test "$GCC" = "yes" -o "$COM_IS_CLANG" = TRUE; then
......
......@@ -22,17 +22,10 @@
#include <type_traits>
#include <utility>
#include <config_global.h>
#include <rtl/string.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
#if HAVE_CXX14_CONSTEXPR
#define CONSTEXPR constexpr
#else
#define CONSTEXPR
#endif
namespace o3tl {
#if defined _MSC_VER
......@@ -64,15 +57,13 @@ public:
constexpr array_view() noexcept : data_(nullptr), size_(0) {}
template<size_type N>
CONSTEXPR array_view (T (&a)[N]) noexcept : data_(a), size_(N) {}
constexpr array_view (T (&a)[N]) noexcept : data_(a), size_(N) {}
CONSTEXPR array_view (T *a, size_type len) noexcept
constexpr array_view (T *a, size_type len) noexcept
: data_(a), size_(len)
{
#if HAVE_CXX14_CONSTEXPR
// not terribly sure about this, might need to relax it
assert((a == nullptr && len == 0) || (a != nullptr && len > 0));
#endif
}
/// Allow for assigning array_view<T> to array_view<T const> i.e.
......@@ -106,25 +97,17 @@ public:
constexpr size_type size() const noexcept { return size_; }
constexpr size_type length() const noexcept { return size(); }
#if !defined __clang__ || HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type max_size() const noexcept {
#if defined __clang__ // avoid constexpr issues with other, older compilers
(void) this; // loplugin:staticmethods
#endif
constexpr size_type max_size() const noexcept {
(void) this; // silence loplugin:staticmethods
return npos - 1;
}
constexpr reference operator [](size_type pos) const {
#if HAVE_CXX14_CONSTEXPR
assert(pos < size());
#endif
return data_[pos];
}
CONSTEXPR
reference at(size_type pos) const {
constexpr reference at(size_type pos) const {
if (pos >= size()) {
throw std::out_of_range("o3tl::array_view::at");
}
......@@ -132,22 +115,18 @@ public:
}
constexpr reference front() const {
#if HAVE_CXX14_CONSTEXPR
assert(!empty());
#endif
return operator [](0);
}
constexpr reference back() const {
#if HAVE_CXX14_CONSTEXPR
assert(!empty());
#endif
return operator [](size() - 1);
}
constexpr pointer data() const noexcept { return data_; }
CONSTEXPR void swap(array_view & s) noexcept {
constexpr void swap(array_view & s) noexcept {
std::swap(data_, s.data_);
std::swap(size_, s.size_);
}
......@@ -179,9 +158,6 @@ struct hash<o3tl::array_view<T>> {
} // namespace std
#undef CONSTEXPR
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
......@@ -15,8 +15,6 @@
#include <algorithm>
#include <cassert>
#include <config_global.h>
// C++17 std::clamp
namespace o3tl
......@@ -29,9 +27,7 @@ using std::clamp;
template <typename T> constexpr const T& clamp(const T& v, const T& lo, const T& hi)
{
#if HAVE_CXX14_CONSTEXPR
assert(!(hi < lo));
#endif
return v < lo ? lo : (hi < v ? hi : v);
}
......
......@@ -22,7 +22,6 @@
#include <type_traits>
#include <utility>
#include <config_global.h>
#include <rtl/string.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
......@@ -174,10 +173,7 @@ public:
constexpr basic_string_view(basic_string_view const &) noexcept = default;
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
basic_string_view & operator =(basic_string_view const & other) noexcept = default;
constexpr basic_string_view & operator =(basic_string_view const & other) noexcept = default;
// The various character types are handled below in the "LO specifics, to
// make up for traits::length not necessarily being constexpr yet for
......@@ -217,29 +213,19 @@ public:
constexpr size_type length() const noexcept { return size(); }
#if !defined __clang__ || HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type max_size() const noexcept {
#if defined __clang__ // avoid constexpr issues with other, older compilers
(void) this; // loplugin:staticmethods
#endif
constexpr size_type max_size() const noexcept {
(void) this; // silence loplugin:staticmethods
return npos - 1;
}
constexpr bool empty() const noexcept { return size_ == 0; }
constexpr const_reference operator [](size_type pos) const {
#if HAVE_CXX14_CONSTEXPR
assert(pos < size());
#endif
return data_[pos];
}
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
const_reference at(size_type pos) const {
constexpr const_reference at(size_type pos) const {
if (pos >= size()) {
throw std::out_of_range("o3tl::basic_string_view::at");
}
......@@ -247,42 +233,29 @@ public:
}
constexpr const_reference front() const {
#if HAVE_CXX14_CONSTEXPR
assert(!empty());
#endif
return operator [](0);
}
constexpr const_reference back() const {
#if HAVE_CXX14_CONSTEXPR
assert(!empty());
#endif
return operator [](size() - 1);
}
constexpr const_pointer data() const noexcept { return data_; }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
void remove_prefix(size_type n) {
constexpr void remove_prefix(size_type n) {
assert(n <= size());
data_ += n;
size_ -= n;
}
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
void remove_suffix(size_type n) {
constexpr void remove_suffix(size_type n) {
assert(n <= size());
size_ -= n;
}
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
void swap(basic_string_view & s) noexcept {
constexpr void swap(basic_string_view & s) noexcept {
std::swap(data_, s.data_);
std::swap(size_, s.size_);
}
......@@ -296,10 +269,7 @@ public:
return rlen;
}
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
basic_string_view substr(size_type pos = 0, size_type n = npos) const {
constexpr basic_string_view substr(size_type pos = 0, size_type n = npos) const {
if (pos > size()) {
throw std::out_of_range("o3tl::basic_string_view::copy");
}
......@@ -307,10 +277,7 @@ public:
data() + pos, std::min(n, size_type(size() - pos)));
}
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
int compare(basic_string_view s) const noexcept {
constexpr int compare(basic_string_view s) const noexcept {
auto n = traits::compare(data(), s.data(), std::min(size(), s.size()));
return n == 0
? (size() < s.size() ? -1 : size() == s.size() ? 0 : 1) : n;
......@@ -335,10 +302,7 @@ public:
size_type pos1, size_type n1, charT const * s, size_type n2) const
{ return substr(pos1, n1).compare(basic_string_view(s, n2)); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type find(basic_string_view s, size_type pos = 0) const noexcept {
constexpr size_type find(basic_string_view s, size_type pos = 0) const noexcept {
if (s.size() <= size()) {
for (auto xpos = pos; xpos <= size() - s.size(); ++xpos) {
bool match = true;
......@@ -365,10 +329,7 @@ public:
constexpr size_type find(charT const * s, size_type pos = 0) const
{ return find(basic_string_view(s), pos); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type rfind(basic_string_view s, size_type pos = npos) const noexcept {
constexpr size_type rfind(basic_string_view s, size_type pos = npos) const noexcept {
if (s.size() <= size()) {
for (auto xpos = std::min<size_type>(size() - s.size(), pos);;
--xpos)
......@@ -400,10 +361,7 @@ public:
constexpr size_type rfind(charT const * s, size_type pos = npos) const
{ return rfind(basic_string_view(s), pos); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type find_first_of(basic_string_view s, size_type pos = 0) const
constexpr size_type find_first_of(basic_string_view s, size_type pos = 0) const
noexcept
{
for (auto xpos = pos; xpos < size(); ++xpos) {
......@@ -426,10 +384,7 @@ public:
constexpr size_type find_first_of(charT const * s, size_type pos = 0) const
{ return find_first_of(basic_string_view(s), pos); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type find_last_of(basic_string_view s, size_type pos = npos) const
constexpr size_type find_last_of(basic_string_view s, size_type pos = npos) const
noexcept
{
if (!empty()) {
......@@ -459,10 +414,7 @@ public:
const
{ return find_last_of(basic_string_view(s), pos); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type find_first_not_of(basic_string_view s, size_type pos = 0) const
constexpr size_type find_first_not_of(basic_string_view s, size_type pos = 0) const
noexcept
{
for (auto xpos = pos; xpos < size(); ++xpos) {
......@@ -492,10 +444,7 @@ public:
const
{ return find_first_not_of(basic_string_view(s), pos); }
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
size_type find_last_not_of(basic_string_view s, size_type pos = npos) const
constexpr size_type find_last_not_of(basic_string_view s, size_type pos = npos) const
noexcept
{
if (!empty()) {
......
......@@ -25,12 +25,10 @@
#include <cassert>
#include <type_traits>
#include <config_global.h>
namespace o3tl
{
#if HAVE_CXX14_CONSTEXPR
#if !defined __COVERITY__
namespace detail {
......@@ -90,7 +88,7 @@ public:
typename std::enable_if<std::is_integral<T>::value, int>::type = 0):
m_value(value)
{
#if !defined __COVERITY__ && HAVE_CXX14_CONSTEXPR
#if !defined __COVERITY__
// catch attempts to pass in out-of-range values early
assert(detail::isInRange<UNDERLYING_TYPE>(value)
&& "out of range");
......
......@@ -25,7 +25,6 @@
#include <cassert>
#include <type_traits>
#include <config_global.h>
#include <sal/types.h>
namespace o3tl {
......@@ -76,14 +75,12 @@ struct is_typed_flags {
explicit constexpr Wrap(typename std::underlying_type<E>::type value):
value_(value)
{
#if HAVE_CXX14_CONSTEXPR
assert(detail::isNonNegative(value));
assert(
static_cast<typename std::underlying_type<E>::type>(~0) == M
// avoid "operands don't affect result" warnings when M
// covers all bits of the underlying type
|| (value & ~M) == 0);
#endif
}
constexpr operator E() const { return static_cast<E>(value_); }
......@@ -105,11 +102,9 @@ struct is_typed_flags {
template<typename E>
constexpr typename o3tl::typed_flags<E>::Wrap operator ~(E rhs) {
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
o3tl::typed_flags<E>::mask
& ~static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -126,14 +121,12 @@ template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ~(
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ^(
E lhs, E rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
^ static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -142,11 +135,9 @@ template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ^(
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ^(
E lhs, typename o3tl::typed_flags<E>::Wrap rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
^ static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -155,11 +146,9 @@ template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ^(
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator ^(
typename o3tl::typed_flags<E>::Wrap lhs, E rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
^ static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -180,14 +169,12 @@ typename o3tl::typed_flags<typename W::Unwrapped::Self>::Wrap operator ^(
template<typename E>
constexpr typename o3tl::typed_flags<E>::Wrap operator &(E lhs, E rhs) {
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
& static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -196,11 +183,9 @@ constexpr typename o3tl::typed_flags<E>::Wrap operator &(E lhs, E rhs) {
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator &(
E lhs, typename o3tl::typed_flags<E>::Wrap rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
& static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -209,11 +194,9 @@ template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator &(
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator &(
typename o3tl::typed_flags<E>::Wrap lhs, E rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
& static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -234,14 +217,12 @@ typename o3tl::typed_flags<typename W::Unwrapped::Self>::Wrap operator &(
template<typename E>
constexpr typename o3tl::typed_flags<E>::Wrap operator |(E lhs, E rhs) {
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
| static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -250,11 +231,9 @@ constexpr typename o3tl::typed_flags<E>::Wrap operator |(E lhs, E rhs) {
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator |(
E lhs, typename o3tl::typed_flags<E>::Wrap rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(lhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
| static_cast<typename std::underlying_type<E>::type>(rhs));
......@@ -263,11 +242,9 @@ template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator |(
template<typename E> constexpr typename o3tl::typed_flags<E>::Wrap operator |(
typename o3tl::typed_flags<E>::Wrap lhs, E rhs)
{
#if HAVE_CXX14_CONSTEXPR
assert(
o3tl::detail::isNonNegative(
static_cast<typename std::underlying_type<E>::type>(rhs)));
#endif
return static_cast<typename o3tl::typed_flags<E>::Wrap>(
static_cast<typename std::underlying_type<E>::type>(lhs)
| static_cast<typename std::underlying_type<E>::type>(rhs));
......
......@@ -16,10 +16,6 @@
#include "sal/types.h"
#if defined LIBO_INTERNAL_ONLY
#include "config_global.h"
#endif
// The unittest uses slightly different code to help check that the proper
// calls are made. The class is put into a different namespace to make
// sure the compiler generates a different (if generating also non-inline)
......@@ -157,7 +153,7 @@ struct ConstCharArrayDetector< const char[ N ], T >
typedef T Type;
static const std::size_t length = N - 1;
static const bool ok = true;
#if defined LIBO_INTERNAL_ONLY && HAVE_CXX14_CONSTEXPR
#if defined LIBO_INTERNAL_ONLY
constexpr
#endif
static bool isValid(char const (& literal)[N]) {
......@@ -183,7 +179,7 @@ struct ConstCharArrayDetector< const char[ 1 ], T >
typedef T Type;
static const std::size_t length = 0;
static const bool ok = true;
#if defined LIBO_INTERNAL_ONLY && HAVE_CXX14_CONSTEXPR
#if defined LIBO_INTERNAL_ONLY
constexpr
#endif
static bool isValid(char const (& literal)[1]) {
......@@ -202,10 +198,7 @@ struct ConstCharArrayDetector<char8_t const [N], T> {
using Type = T;
static constexpr bool const ok = true;
static constexpr std::size_t const length = N - 1;
#if HAVE_CXX14_CONSTEXPR
constexpr
#endif
static bool isValid(char8_t const (& literal)[N]) {
static constexpr bool isValid(char8_t const (& literal)[N]) {
for (std::size_t i = 0; i != N - 1; ++i) {
if (literal[i] == u8'\0') {
return false;
......
......@@ -33,7 +33,6 @@
#include "rtl/textenc.h"
#ifdef LIBO_INTERNAL_ONLY // "RTL_FAST_STRING"
#include "config_global.h"
#include "rtl/stringconcat.hxx"
#endif
......@@ -79,10 +78,8 @@ struct SAL_WARN_UNUSED OUStringLiteral
data(
libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal))
{
#if HAVE_CXX14_CONSTEXPR
assert(
libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal));
#endif
}
int size;
......
......@@ -27,7 +27,6 @@
#include <type_traits>
#include <memory>
#include <config_global.h>
#include <svl/svldllapi.h>
#include <svl/poolitem.hxx>
#include <svl/typedwhich.hxx>
......@@ -57,9 +56,7 @@ constexpr bool validRanges() {
// std::size_t is no smaller than sal_uInt16:
constexpr std::size_t rangeSize(sal_uInt16 wid1, sal_uInt16 wid2) {
#if HAVE_CXX14_CONSTEXPR
assert(validRange(wid1, wid2));
#endif
return wid2 - wid1 + 1;
}
......
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