Added a workaround for C++20 ostream having deleted operator<< for wchar_t.

Due to the new overload resolution rules for comparison operators in C++20,
the comparison became ambiguous.

.travis.yml

@@ -138,12 +138,23 @@ matrix:
 
     - os: linux
       dist: bionic
-      compiler: gcc-UBSAN
-      env: UBSAN=1 TOOLSET=gcc COMPILER=g++-9 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
+      compiler: gcc-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=03,11,14,17,20
       addons:
         apt:
           packages:
-            - g++-9
+            - g++-10
+          sources:
+            - sourceline: "ppa:ubuntu-toolchain-r/test"
+
+    - os: linux
+      dist: bionic
+      compiler: gcc-UBSAN
+      env: UBSAN=1 TOOLSET=gcc COMPILER=g++-10 CXXSTD=03,11,14,17,20 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
+      addons:
+        apt:
+          packages:
+            - g++-10
           sources:
             - sourceline: "ppa:ubuntu-toolchain-r/test"
 
@@ -318,46 +329,60 @@ matrix:
 
     - os: linux
       dist: xenial
-      compiler: clang-UBSAN
-      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-9 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1
+      compiler: clang-10
+      env: TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,20
       addons:
         apt:
           packages:
-            - clang-9
+            - clang-10
             - libstdc++-9-dev
           sources:
             - sourceline: "ppa:ubuntu-toolchain-r/test"
-            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main"
+            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main"
+              key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
+
+    - os: linux
+      dist: xenial
+      compiler: clang-UBSAN
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,20 UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - clang-10
+            - libstdc++-9-dev
+          sources:
+            - sourceline: "ppa:ubuntu-toolchain-r/test"
+            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main"
               key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
     - os: linux
       dist: xenial
       compiler: clang-libc++
-      env: TOOLSET=clang COMPILER=clang++-9 CXXSTD=03,11,14,17,2a CXXFLAGS="-stdlib=libc++" LINKFLAGS="-stdlib=libc++"
+      env: TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,20 CXXFLAGS="-stdlib=libc++" LINKFLAGS="-stdlib=libc++"
       addons:
         apt:
           packages:
-            - clang-9
-            - libc++-9-dev
-            - libc++abi-9-dev
+            - clang-10
+            - libc++-10-dev
+            - libc++abi-10-dev
           sources:
             - sourceline: "ppa:ubuntu-toolchain-r/test"
-            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main"
+            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main"
               key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
     - os: linux
       dist: xenial
       compiler: clang-libc++-UBSAN
-      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-9 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1 CXXFLAGS="-stdlib=libc++" LINKFLAGS="-stdlib=libc++"
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,20 UBSAN_OPTIONS=print_stacktrace=1 CXXFLAGS="-stdlib=libc++" LINKFLAGS="-stdlib=libc++"
       addons:
         apt:
           packages:
-            - clang-9
-            - libc++-9-dev
-            - libc++abi-9-dev
+            - clang-10
+            - libc++-10-dev
+            - libc++abi-10-dev
           sources:
             - sourceline: "ppa:ubuntu-toolchain-r/test"
-            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main"
+            - sourceline: "deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main"
               key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
 
 # clang, OS X

include/boost/integer.hpp

@@ -137,7 +137,7 @@ namespace boost
   {
      BOOST_STATIC_ASSERT_MSG(Bits <= (int)(sizeof(boost::uintmax_t) * CHAR_BIT),
          "No suitable unsigned integer type with the requested number of bits is available.");
-#if (defined(__BORLANDC__) || defined(__CODEGEAR__)) && defined(BOOST_NO_INTEGRAL_INT64_T)
+#if (defined(BOOST_BORLANDC) || defined(__CODEGEAR__)) && defined(BOOST_NO_INTEGRAL_INT64_T)
      // It's really not clear why this workaround should be needed... shrug I guess!  JM
      BOOST_STATIC_CONSTANT(int, s =
            6 +
@@ -219,7 +219,7 @@ namespace boost
 #endif
   struct uint_value_t
   {
-#if (defined(__BORLANDC__) || defined(__CODEGEAR__))
+#if (defined(BOOST_BORLANDC) || defined(__CODEGEAR__))
      // It's really not clear why this workaround should be needed... shrug I guess!  JM
 #if defined(BOOST_NO_INTEGRAL_INT64_T)
       BOOST_STATIC_CONSTANT(unsigned, which =

include/boost/integer/common_factor_ct.hpp

@@ -30,7 +30,7 @@ namespace detail
         BOOST_STATIC_CONSTANT( static_gcd_type, new_value1 = Value2 );
         BOOST_STATIC_CONSTANT( static_gcd_type, new_value2 = Value1 % Value2 );
 
-        #ifndef __BORLANDC__
+        #ifndef BOOST_BORLANDC
         #define BOOST_DETAIL_GCD_HELPER_VAL(Value) static_cast<static_gcd_type>(Value)
         #else
         typedef static_gcd_helper_t  self_type;

include/boost/integer/common_factor_rt.hpp

@@ -129,7 +129,7 @@ namespace boost {
          BOOST_FORCEINLINE static BOOST_CXX14_CONSTEXPR unsigned make_odd(T& val) BOOST_GCD_NOEXCEPT(T)
          {
             unsigned r = 0;
-            while(0 == (val & 1u))
+            while (T(0) == (val & 1u))
             {
 #ifdef _MSC_VER  // VC++ can't handle operator >>= in constexpr code for some reason
                val = val >> 1;

include/boost/integer/integer_log2.hpp

@@ -15,12 +15,12 @@
 #ifndef BOOST_INTEGER_INTEGER_LOG2_HPP
 #define BOOST_INTEGER_INTEGER_LOG2_HPP
 
-#include <assert.h>
-#ifdef __BORLANDC__
-#include <climits>
-#endif
 #include <boost/limits.hpp>
 #include <boost/config.hpp>
+#include <boost/assert.hpp>
+#if defined(BOOST_BORLANDC)
+#include <climits>
+#endif
 
 
 namespace boost {
@@ -75,7 +75,7 @@ namespace boost {
   template <typename T>
   struct width {
 
-#ifdef __BORLANDC__
+#ifdef BOOST_BORLANDC
       BOOST_STATIC_CONSTANT(int, value = sizeof(T) * CHAR_BIT);
 #else
       BOOST_STATIC_CONSTANT(int, value = (std::numeric_limits<T>::digits));
@@ -93,7 +93,7 @@ namespace boost {
  template <typename T>
  int integer_log2(T x) {
 
-     assert(x > 0);
+     BOOST_ASSERT(x > 0);
 
      const int n = detail::max_pow2_less<
                      detail::width<T> :: value, 4

include/boost/integer/static_log2.hpp

@@ -16,7 +16,8 @@
 #ifndef BOOST_INTEGER_STATIC_LOG2_HPP
 #define BOOST_INTEGER_STATIC_LOG2_HPP
 
-#include "boost/integer_fwd.hpp" // for boost::intmax_t
+#include <boost/config.hpp>
+#include <boost/integer_fwd.hpp>
 
 namespace boost {
 
@@ -122,6 +123,4 @@ namespace boost {
 
 }
 
-
-
 #endif // include guard

include/boost/integer/static_min_max.hpp

@@ -10,6 +10,7 @@
 #ifndef BOOST_INTEGER_STATIC_MIN_MAX_HPP
 #define BOOST_INTEGER_STATIC_MIN_MAX_HPP
 
+#include <boost/config.hpp>
 #include <boost/integer_fwd.hpp>  // self include
 
 namespace boost

include/boost/integer_traits.hpp

@@ -103,7 +103,7 @@ class integer_traits<wchar_t>
     // library: they are wrong!
 #if defined(WCHAR_MIN) && defined(WCHAR_MAX) && !defined(__APPLE__)
     public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX>
-#elif defined(__BORLANDC__) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__))
+#elif defined(BOOST_BORLANDC) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__))
     // No WCHAR_MIN and WCHAR_MAX, whar_t is short and unsigned:
     public detail::integer_traits_base<wchar_t, 0, 0xffff>
 #elif (defined(__sgi) && (!defined(__SGI_STL_PORT) || __SGI_STL_PORT < 0x400))\

test/integer_test.cpp

@@ -27,7 +27,7 @@
 #ifdef BOOST_MSVC
 #pragma warning(disable:4127) // conditional expression is constant
 #endif
-#if defined( __BORLANDC__ )
+#if defined( BOOST_BORLANDC )
 # pragma option -w-8008 -w-8066 // condition is always true
 #endif
 

test/integer_traits_test.cpp

@@ -35,6 +35,7 @@ namespace fix{
 inline int make_char_numeric_for_streaming(char c) { return c; }
 inline int make_char_numeric_for_streaming(signed char c) { return c; }
 inline int make_char_numeric_for_streaming(unsigned char c) { return c; }
+inline long long int make_char_numeric_for_streaming(wchar_t c) { return c; }
 }
 using namespace fix;
 #else
@@ -42,6 +43,7 @@ template<typename T> inline T make_char_numeric_for_streaming(T x) { return x; }
 inline int make_char_numeric_for_streaming(char c) { return c; }
 inline int make_char_numeric_for_streaming(signed char c) { return c; }
 inline int make_char_numeric_for_streaming(unsigned char c) { return c; }
+inline long long int make_char_numeric_for_streaming(wchar_t c) { return c; }
 #endif
 
 template<class T>