Import libc++ trunk r165949. Among other improvements and bug fixes,

this has many visibility problems fixed, which should help with
compiling certain ports that exercise C++11 mode (i.e. Firefox).

Also, belatedly add the LICENSE.TXT and accompanying CREDITS.TXT files,
which are referred to in all the source files.

MFC after:	1 month

1 files changed, 43 insertions, 19 deletions

diff --git a/contrib/libc++/include/bitset b/contrib/libc++/include/bitset
index 6e12e5c..1167f50 100644
--- a/contrib/libc++/include/bitset
+++ b/contrib/libc++/include/bitset
@@ -148,9 +148,9 @@ class __bitset
 public:
     typedef ptrdiff_t              difference_type;
     typedef size_t                 size_type;
+    typedef size_type              __storage_type;
 protected:
     typedef __bitset __self;
-    typedef size_type              __storage_type;
     typedef       __storage_type*  __storage_pointer;
     typedef const __storage_type*  __const_storage_pointer;
     static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
@@ -159,7 +159,7 @@ protected:
     friend class __bit_const_reference<__bitset>;
     friend class __bit_iterator<__bitset, false>;
     friend class __bit_iterator<__bitset, true>;
-    friend class __bit_array<__bitset>;
+    friend struct __bit_array<__bitset>;
 
     __storage_type __first_[_N_words];
 
@@ -168,12 +168,12 @@ protected:
     typedef __bit_iterator<__bitset, false>            iterator;
     typedef __bit_iterator<__bitset, true>             const_iterator;
 
-    __bitset() _NOEXCEPT;
-    explicit __bitset(unsigned long long __v) _NOEXCEPT;
+    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
+    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;
 
     _LIBCPP_INLINE_VISIBILITY reference __make_ref(size_t __pos) _NOEXCEPT
         {return reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
-    _LIBCPP_INLINE_VISIBILITY const_reference __make_ref(size_t __pos) const _NOEXCEPT
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT
         {return const_reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
     _LIBCPP_INLINE_VISIBILITY iterator __make_iter(size_t __pos) _NOEXCEPT
         {return iterator(__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
@@ -194,8 +194,10 @@ protected:
     bool any() const _NOEXCEPT;
     size_t __hash_code() const _NOEXCEPT;
 private:
+#ifdef _LIBCPP_HAS_NO_CONSTEXPR
     void __init(unsigned long long __v, false_type) _NOEXCEPT;
     void __init(unsigned long long __v, true_type) _NOEXCEPT;
+#endif  // _LIBCPP_HAS_NO_CONSTEXPR
     unsigned long to_ulong(false_type) const;
     unsigned long to_ulong(true_type) const;
     unsigned long long to_ullong(false_type) const;
@@ -206,11 +208,19 @@ private:
 
 template <size_t _N_words, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<_N_words, _Size>::__bitset() _NOEXCEPT
+#ifndef _LIBCPP_HAS_NO_CONSTEXPR
+    : __first_{0}
+#endif
 {
+#ifdef _LIBCPP_HAS_NO_CONSTEXPR
     _VSTD::fill_n(__first_, _N_words, __storage_type(0));
+#endif
 }
 
+#ifdef _LIBCPP_HAS_NO_CONSTEXPR
+
 template <size_t _N_words, size_t _Size>
 void
 __bitset<_N_words, _Size>::__init(unsigned long long __v, false_type) _NOEXCEPT
@@ -232,11 +242,19 @@ __bitset<_N_words, _Size>::__init(unsigned long long __v, true_type) _NOEXCEPT
     _VSTD::fill(__first_ + 1, __first_ + sizeof(__first_)/sizeof(__first_[0]), __storage_type(0));
 }
 
+#endif  // _LIBCPP_HAS_NO_CONSTEXPR
+
 template <size_t _N_words, size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<_N_words, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
+#ifndef _LIBCPP_HAS_NO_CONSTEXPR
+    : __first_{__v}
+#endif
 {
+#ifdef _LIBCPP_HAS_NO_CONSTEXPR
     __init(__v, integral_constant<bool, sizeof(unsigned long long) == sizeof(__storage_type)>());
+#endif
 }
 
 template <size_t _N_words, size_t _Size>
@@ -406,9 +424,9 @@ class __bitset<1, _Size>
 public:
     typedef ptrdiff_t              difference_type;
     typedef size_t                 size_type;
+    typedef size_type              __storage_type;
 protected:
     typedef __bitset __self;
-    typedef size_type              __storage_type;
     typedef       __storage_type*  __storage_pointer;
     typedef const __storage_type*  __const_storage_pointer;
     static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
@@ -417,7 +435,7 @@ protected:
     friend class __bit_const_reference<__bitset>;
     friend class __bit_iterator<__bitset, false>;
     friend class __bit_iterator<__bitset, true>;
-    friend class __bit_array<__bitset>;
+    friend struct __bit_array<__bitset>;
 
     __storage_type __first_;
 
@@ -426,12 +444,12 @@ protected:
     typedef __bit_iterator<__bitset, false>            iterator;
     typedef __bit_iterator<__bitset, true>             const_iterator;
 
-    __bitset() _NOEXCEPT;
-    explicit __bitset(unsigned long long __v) _NOEXCEPT;
+    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
+    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;
 
     _LIBCPP_INLINE_VISIBILITY reference __make_ref(size_t __pos) _NOEXCEPT
         {return reference(&__first_, __storage_type(1) << __pos);}
-    _LIBCPP_INLINE_VISIBILITY const_reference __make_ref(size_t __pos) const _NOEXCEPT
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT
         {return const_reference(&__first_, __storage_type(1) << __pos);}
     _LIBCPP_INLINE_VISIBILITY iterator __make_iter(size_t __pos) _NOEXCEPT
         {return iterator(&__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
@@ -455,6 +473,7 @@ protected:
 
 template <size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<1, _Size>::__bitset() _NOEXCEPT
     : __first_(0)
 {
@@ -462,6 +481,7 @@ __bitset<1, _Size>::__bitset() _NOEXCEPT
 
 template <size_t _Size>
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<1, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
     : __first_(static_cast<__storage_type>(__v))
 {
@@ -549,9 +569,9 @@ class __bitset<0, 0>
 public:
     typedef ptrdiff_t              difference_type;
     typedef size_t                 size_type;
+    typedef size_type              __storage_type;
 protected:
     typedef __bitset __self;
-    typedef size_type              __storage_type;
     typedef       __storage_type*  __storage_pointer;
     typedef const __storage_type*  __const_storage_pointer;
     static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
@@ -567,12 +587,12 @@ protected:
     typedef __bit_iterator<__bitset, false>            iterator;
     typedef __bit_iterator<__bitset, true>             const_iterator;
 
-    __bitset() _NOEXCEPT;
-    explicit __bitset(unsigned long long) _NOEXCEPT;
+    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
+    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long) _NOEXCEPT;
 
     _LIBCPP_INLINE_VISIBILITY reference __make_ref(size_t) _NOEXCEPT
         {return reference(0, 1);}
-    _LIBCPP_INLINE_VISIBILITY const_reference __make_ref(size_t) const _NOEXCEPT
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t) const _NOEXCEPT
         {return const_reference(0, 1);}
     _LIBCPP_INLINE_VISIBILITY iterator __make_iter(size_t) _NOEXCEPT
         {return iterator(0, 0);}
@@ -595,16 +615,18 @@ protected:
 };
 
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<0, 0>::__bitset() _NOEXCEPT
 {
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
 __bitset<0, 0>::__bitset(unsigned long long) _NOEXCEPT
 {
 }
 
-template <size_t _Size> class bitset;
+template <size_t _Size> class _LIBCPP_VISIBLE bitset;
 template <size_t _Size> struct hash<bitset<_Size> >;
 
 template <size_t _Size>
@@ -619,8 +641,9 @@ public:
     typedef typename base::const_reference const_reference;
 
     // 23.3.5.1 constructors:
-    /*constexpr*/ _LIBCPP_INLINE_VISIBILITY bitset() _NOEXCEPT {}
-    /*constexpr*/ _LIBCPP_INLINE_VISIBILITY bitset(unsigned long long __v) _NOEXCEPT : base(__v) {}
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR bitset() _NOEXCEPT {}
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
+        bitset(unsigned long long __v) _NOEXCEPT : base(__v) {}
     template<class _CharT>
         explicit bitset(const _CharT* __str,
                         typename basic_string<_CharT>::size_type __n = basic_string<_CharT>::npos,
@@ -647,7 +670,8 @@ public:
     bitset& flip(size_t __pos);
 
     // element access:
-    _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_t __p) const {return base::__make_ref(__p);}
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
+                              const_reference operator[](size_t __p) const {return base::__make_ref(__p);}
     _LIBCPP_INLINE_VISIBILITY       reference operator[](size_t __p)       {return base::__make_ref(__p);}
     unsigned long to_ulong() const;
     unsigned long long to_ullong() const;
@@ -663,7 +687,7 @@ public:
     basic_string<char, char_traits<char>, allocator<char> > to_string(char __zero = '0',
                                                                       char __one = '1') const;
     size_t count() const _NOEXCEPT;
-    /*constexpr*/ _LIBCPP_INLINE_VISIBILITY size_t size() const _NOEXCEPT {return _Size;}
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR size_t size() const _NOEXCEPT {return _Size;}
     bool operator==(const bitset& __rhs) const _NOEXCEPT;
     bool operator!=(const bitset& __rhs) const _NOEXCEPT;
     bool test(size_t __pos) const;