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Fixed compilation issues for GCC on Linux.

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This commit is contained in:
Neil MacIntosh
2016-07-26 18:34:27 -07:00
parent b03b04bfcd
commit c366f4415d
4 changed files with 207 additions and 265 deletions
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258
include/string_span.h
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@@ -234,40 +234,39 @@ template <typename CharT, std::ptrdiff_t Extent = dynamic_extent>
class basic_string_span
{
public:
using value_type = CharT;
using const_value_type = std::add_const_t<value_type>;
using pointer = std::add_pointer_t<value_type>;
using reference = std::add_lvalue_reference_t<value_type>;
using const_reference = std::add_lvalue_reference_t<const_value_type>;
using impl_type = span<value_type, Extent>;
using element_type = CharT;
using pointer = std::add_pointer_t<element_type>;
using reference = std::add_lvalue_reference_t<element_type>;
using const_reference = std::add_lvalue_reference_t<std::add_const_t<element_type>>;
using impl_type = span<element_type, Extent>;
using size_type = ptrdiff_t;
using index_type = typename impl_type::index_type;
using iterator = typename impl_type::iterator;
using const_iterator = typename impl_type::const_iterator;
using reverse_iterator = typename impl_type::reverse_iterator;
using const_reverse_iterator = typename impl_type::const_reverse_iterator;
// default (empty)
constexpr basic_string_span() = default;
constexpr basic_string_span() noexcept = default;
// copy
constexpr basic_string_span(const basic_string_span& other) = default;
constexpr basic_string_span(const basic_string_span& other) noexcept = default;
// move
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_string_span(basic_string_span&& other) = default;
constexpr basic_string_span(basic_string_span&& other) noexcept = default;
#else
constexpr basic_string_span(basic_string_span&& other) : span_(std::move(other.span_)) {}
#endif
// assign
constexpr basic_string_span& operator=(const basic_string_span& other) = default;
constexpr basic_string_span& operator=(const basic_string_span& other) noexcept = default;
// move assign
#ifndef GSL_MSVC_NO_DEFAULT_MOVE_CTOR
constexpr basic_string_span& operator=(basic_string_span&& other) = default;
constexpr basic_string_span& operator=(basic_string_span&& other) noexcept = default;
#else
constexpr basic_string_span& operator=(basic_string_span&& other)
constexpr basic_string_span& operator=(basic_string_span&& other) noexcept
{
span_ = std::move(other.span_);
return *this;
@@ -277,47 +276,55 @@ public:
// from nullptr
constexpr basic_string_span(std::nullptr_t ptr) noexcept : span_(ptr) {}
// from nullptr and length
constexpr basic_string_span(std::nullptr_t ptr, size_type length) noexcept : span_(ptr, length)
{
}
constexpr basic_string_span(pointer ptr, index_type length) : span_(ptr, length) {}
constexpr basic_string_span(pointer firstElem, pointer lastElem) : span_(firstElem, lastElem) {}
// From static arrays - if 0-terminated, remove 0 from the view
// from static arrays and string literals
// All other containers allow 0s within the length, so we do not remove them
template <size_t N>
constexpr basic_string_span(value_type (&arr)[N]) noexcept : span_(remove_z(arr))
constexpr basic_string_span(element_type (&arr)[N]) : span_(remove_z(arr))
{
}
template <size_t N, class ArrayElementType = std::remove_const_t<element_type>>
constexpr basic_string_span(std::array<ArrayElementType, N>& arr) noexcept
: span_(arr) {}
template <size_t N, class ArrayElementType = std::remove_const_t<element_type>>
constexpr basic_string_span(const std::array<ArrayElementType, N>& arr) noexcept
: span_(arr) {}
// Container signature should work for basic_string after C++17 version exists
template <class Traits, class Allocator>
constexpr basic_string_span(std::basic_string<element_type, Traits, Allocator>& str)
: span_(&str[0], str.length())
{
}
// Those allow 0s within the length, so we do not remove them
// from raw data and length
constexpr basic_string_span(pointer ptr, size_type length) noexcept : span_(ptr, length) {}
// from string
constexpr basic_string_span(std::string& s) noexcept
: span_(const_cast<pointer>(s.data()), narrow_cast<std::ptrdiff_t>(s.length()))
template <class Traits, class Allocator>
constexpr basic_string_span(const std::basic_string<element_type, Traits, Allocator>& str)
: span_(&str[0], str.length())
{
}
// from containers. Containers must have .size() and .data() function signatures
template <typename Cont,
typename = std::enable_if_t<
!details::is_basic_string_span<Cont>::value && !details::is_span<Cont>::value &&
std::is_convertible<Cont::pointer, pointer>::value &&
std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>>
constexpr basic_string_span(Cont& cont) : span_(cont.data(), cont.size())
// from containers. Containers must have a pointer type and data() function signatures
template <class Container,
class = std::enable_if_t<
!details::is_basic_string_span<Container>::value &&
!details::is_span<Container>::value &&
std::is_convertible<typename Container::pointer, pointer>::value &&
std::is_convertible<typename Container::pointer, decltype(std::declval<Container>().data())>::value>>
constexpr basic_string_span(Container& cont) : span_(cont)
{
}
// disallow creation from temporary containers and strings
template <typename Cont,
typename = std::enable_if_t<
!details::is_basic_string_span<Cont>::value && !details::is_span<Cont>::value &&
std::is_convertible<Cont::pointer, pointer>::value &&
std::is_convertible<Cont::pointer, decltype(std::declval<Cont>().data())>::value>>
constexpr basic_string_span(const Cont& cont) : span_(cont.data(), cont.size())
template <class Container,
class = std::enable_if_t<
!details::is_basic_string_span<Container>::value &&
!details::is_span<Container>::value &&
std::is_convertible<typename Container::pointer, pointer>::value &&
std::is_convertible<typename Container::pointer, decltype(std::declval<Container>().data())>::value>>
constexpr basic_string_span(const Container& cont) : span_(cont)
{
}
@@ -326,109 +333,97 @@ public:
template <typename OtherValueType, std::ptrdiff_t OtherExtent,
typename Dummy = std::enable_if_t<
std::is_convertible<span<OtherValueType, OtherExtent>, impl_type>::value>>
constexpr basic_string_span(span<OtherValueType, OtherExtent> other) noexcept : span_(other)
constexpr basic_string_span(const span<OtherValueType, OtherExtent>& other) : span_(other)
{
}
#else
// from span
constexpr basic_string_span(span<value_type, Extent> other) noexcept : span_(other) {}
constexpr basic_string_span(span<element_type, Extent> other) : span_(other) {}
template <typename = std::enable_if_t<
!std::is_same<std::remove_const_t<value_type>, value_type>::value>>
constexpr basic_string_span(span<std::remove_const_t<value_type>, Extent> other) noexcept
!std::is_same<std::remove_const_t<element_type>, value_type>::value>>
constexpr basic_string_span(const span<std::remove_const_t<element_type>, Extent>& other)
: span_(other)
{
}
#endif
// from string_span
template <typename OtherValueType, std::ptrdiff_t OtherExtent,
typename = std::enable_if_t<std::is_convertible<
basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other) noexcept
template <class OtherValueType, std::ptrdiff_t OtherExtent,
class = std::enable_if_t<std::is_convertible<
typename basic_string_span<OtherValueType, OtherExtent>::impl_type, impl_type>::value>>
constexpr basic_string_span(basic_string_span<OtherValueType, OtherExtent> other)
: span_(other.data(), other.length())
{
}
constexpr bool empty() const noexcept { return length() == 0; }
// first Count elements
template <size_type Count>
constexpr basic_string_span<value_type, Count> first() const noexcept
template <index_type Count>
constexpr basic_string_span<element_type, Count> first() const
{
return {span_.template first<Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent> first(size_type count) const noexcept
constexpr basic_string_span<index_type, dynamic_extent> first(index_type count) const
{
return {span_.first(count)};
}
// last Count elements
template <size_type Count>
constexpr basic_string_span<value_type, Count> last() const noexcept
template <index_type Count>
constexpr basic_string_span<index_type, Count> last() const
{
return {span_.template last<Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent> last(size_type count) const noexcept
constexpr basic_string_span<element_type, dynamic_extent> last(index_type count) const
{
return {span_.last(count)};
}
// create a subview of Count elements starting from Offset
template <size_type Offset, size_type Count>
constexpr basic_string_span<value_type, Count> subspan() const noexcept
template <index_type Offset, index_type Count>
constexpr basic_string_span<element_type, Count> subspan() const
{
return {span_.template subspan<Offset, Count>()};
}
constexpr basic_string_span<value_type, dynamic_extent>
subspan(size_type offset, size_type count = dynamic_extent) const noexcept
constexpr basic_string_span<element_type, dynamic_extent>
subspan(index_type offset, index_type count = dynamic_extent) const
{
return {span_.subspan(offset, count)};
}
constexpr reference operator[](size_type idx) const noexcept { return span_[idx]; }
constexpr reference operator[](index_type idx) const { return span_[idx]; }
constexpr reference operator()(index_type idx) const { return span_[idx]; }
constexpr pointer data() const noexcept { return span_.data(); }
constexpr pointer data() const { return span_.data(); }
// length of the span in elements
constexpr size_type length() const noexcept { return span_.size(); }
// length of the span in elements
constexpr size_type size() const noexcept { return span_.size(); }
// length of the span in bytes
constexpr size_type size_bytes() const noexcept { return span_.size_bytes(); }
// length of the span in bytes
constexpr size_type length_bytes() const noexcept { return span_.length_bytes(); }
constexpr index_type length() const noexcept { return span_.size(); }
constexpr index_type size() const noexcept { return span_.size(); }
constexpr index_type size_bytes() const noexcept { return span_.size_bytes(); }
constexpr index_type length_bytes() const noexcept { return span_.length_bytes(); }
constexpr bool empty() const noexcept { return size() == 0; }
constexpr iterator begin() const noexcept { return span_.begin(); }
constexpr iterator end() const noexcept { return span_.end(); }
constexpr const_iterator cbegin() const noexcept { return span_.cbegin(); }
constexpr const_iterator cend() const noexcept { return span_.cend(); }
constexpr reverse_iterator rbegin() const noexcept { return span_.rbegin(); }
constexpr reverse_iterator rend() const noexcept { return span_.rend(); }
constexpr const_reverse_iterator crbegin() const noexcept { return span_.crbegin(); }
constexpr const_reverse_iterator crend() const noexcept { return span_.crend(); }
private:
static impl_type remove_z(pointer const& sz, std::ptrdiff_t max) noexcept
static impl_type remove_z(pointer const& sz, std::ptrdiff_t max)
{
return {sz, details::length_func<value_type>()(sz, max)};
return {sz, details::length_func<element_type>()(sz, max)};
}
template <size_t N>
static impl_type remove_z(value_type (&sz)[N]) noexcept
static impl_type remove_z(element_type (&sz)[N])
{
return remove_z(&sz[0], narrow_cast<std::ptrdiff_t>(N));
}
@@ -453,7 +448,7 @@ using cwstring_span = basic_string_span<const wchar_t, Extent>;
//
#ifndef GSL_MSVC_HAS_TYPE_DEDUCTION_BUG
template <typename CharT, ptrdiff_t Extent>
template <typename CharT, std::ptrdiff_t Extent>
std::basic_string<typename std::remove_const<CharT>::type>
to_string(basic_string_span<CharT, Extent> view)
{
@@ -559,15 +554,13 @@ using czstring_span = basic_zstring_span<const char, Max>;
template <std::ptrdiff_t Max = dynamic_extent>
using cwzstring_span = basic_zstring_span<const wchar_t, Max>;
} // namespace GSL
// operator ==
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value>>
bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
template <class CharT, std::ptrdiff_t Extent, class T,
class = std::enable_if_t<details::is_basic_string_span<T>::value || std::is_convertible<
T, gsl::basic_string_span<std::add_const_t<CharT>>>::value>>
bool operator==(const gsl::basic_string_span<CharT, Extent>& one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
gsl::basic_string_span<std::add_const_t<CharT>> tmp(other);
#ifdef GSL_MSVC_NO_CPP14_STD_EQUAL
return (one.size() == tmp.size()) && std::equal(one.begin(), one.end(), tmp.begin());
#else
@@ -576,13 +569,13 @@ bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexc
}
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename Dummy = std::enable_if_t<
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>, Extent>>::value &&
!gsl::details::is_basic_string_span<T>::value>>
bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
class CharT, std::ptrdiff_t Extent, class T,
class = std::enable_if_t<!details::is_basic_string_span<T>::value &&
std::is_convertible<T, gsl::basic_string_span<std::add_const_t<CharT>>>::value
>>
bool operator==(const T& one, const gsl::basic_string_span<CharT, Extent>& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
gsl::basic_string_span<std::add_const_t<CharT>> tmp(one);
#ifdef GSL_MSVC_NO_CPP14_STD_EQUAL
return (tmp.size() == other.size()) && std::equal(tmp.begin(), tmp.end(), other.begin());
#else
@@ -590,40 +583,6 @@ bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
#endif
}
#ifndef _MSC_VER
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator==(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(other);
return std::equal(one.begin(), one.end(), tmp.begin(), tmp.end());
}
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator==(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
gsl::basic_string_span<std::add_const_t<CharT>, Extent> tmp(one);
return std::equal(tmp.begin(), tmp.end(), other.begin(), other.end());
}
#endif
// operator !=
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<std::is_convertible<
@@ -643,38 +602,6 @@ bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
return !(one == other);
}
#ifndef _MSC_VER
// VS treats temp and const containers as convertible to basic_string_span,
// so the cases below are already covered by the previous operators
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator!=(gsl::basic_string_span<CharT, Extent> one, const T& other) noexcept
{
return !(one == other);
}
template <
typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename DataType = typename T::value_type,
typename Dummy = std::enable_if_t<
!gsl::details::is_span<T>::value && !gsl::details::is_basic_string_span<T>::value &&
std::is_convertible<DataType*, CharT*>::value &&
std::is_same<std::decay_t<decltype(std::declval<T>().size(), *std::declval<T>().data())>,
DataType>::value>>
bool operator!=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexcept
{
return !(one == other);
}
#endif
// operator<
template <typename CharT, std::ptrdiff_t Extent = gsl::dynamic_extent, typename T,
typename = std::enable_if_t<std::is_convertible<
@@ -882,6 +809,7 @@ bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other) noexc
return !(one < other);
}
#endif
} // namespace GSL
#ifdef _MSC_VER