Enable syntax hightlighting

* Small fix for those using -Wsign-conversion

* Change I to std::size_t in wrapexcept_add_base

A better fix for -Wsign-conversion

.github/workflows/ci.yml

@@ -155,6 +155,10 @@ jobs:
             cxxstd: "14,17,latest"
             addrmd: 32,64
             os: windows-2019
+          - toolset: msvc-14.3
+            cxxstd: "14,17,latest"
+            addrmd: 32,64
+            os: windows-2022
           - toolset: gcc
             cxxstd: "03,11,14,17,2a"
             addrmd: 64

doc/index.adoc

@@ -9,6 +9,8 @@ Peter Dimov, Emil Dotchevski
 :toc: left
 :idprefix:
 :docinfo: private-footer
+:source-highlighter: rouge
+:source-language: c++
 
 :leveloffset: +1
 

include/boost/throw_exception.hpp

@@ -25,6 +25,7 @@
 #include <boost/config.hpp>
 #include <boost/config/workaround.hpp>
 #include <exception>
+#include <cstddef>
 
 #if !defined( BOOST_EXCEPTION_DISABLE ) && defined( BOOST_BORLANDC ) && BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT(0x593) )
 # define BOOST_EXCEPTION_DISABLE
@@ -51,7 +52,7 @@ typedef char (&wrapexcept_s2)[ 2 ];
 template<class T> wrapexcept_s1 wrapexcept_is_convertible( T* );
 template<class T> wrapexcept_s2 wrapexcept_is_convertible( void* );
 
-template<class E, class B, int I = sizeof( wrapexcept_is_convertible<B>( static_cast< E* >( 0 ) ) ) > struct wrapexcept_add_base;
+template<class E, class B, std::size_t I = sizeof( wrapexcept_is_convertible<B>( static_cast< E* >( 0 ) ) ) > struct wrapexcept_add_base;
 
 template<class E, class B> struct wrapexcept_add_base<E, B, 1>
 {