Fix warnings on 64-bit systems.

Closes #7077.


[SVN r79283]

Author: vprus

src/cmdline.cpp

@@ -249,7 +249,7 @@ namespace boost { namespace program_options { namespace detail {
             bool ok = false;
             for(unsigned i = 0; i < style_parsers.size(); ++i)
             {
-                unsigned current_size = args.size();
+                unsigned current_size = static_cast<unsigned>(args.size());
                 vector<option> next = style_parsers[i](args);
 
                 // Check that option names
@@ -321,7 +321,7 @@ namespace boost { namespace program_options { namespace detail {
                 // We only allow to grab tokens that are not already
                 // recognized as key options.
 
-                int can_take_more = max_tokens - opt.value.size();
+                int can_take_more = max_tokens - static_cast<int>(opt.value.size());
                 unsigned j = i+1;
                 for (; can_take_more && j < result.size(); --can_take_more, ++j)
                 {
@@ -440,7 +440,7 @@ namespace boost { namespace program_options { namespace detail {
             unsigned min_tokens = d.semantic()->min_tokens();
             unsigned max_tokens = d.semantic()->max_tokens();
 
-            unsigned present_tokens = opt.value.size() + other_tokens.size();
+            unsigned present_tokens = static_cast<unsigned>(opt.value.size() + other_tokens.size());
 
             if (present_tokens >= min_tokens)
             {
@@ -455,7 +455,7 @@ namespace boost { namespace program_options { namespace detail {
                 // if they look like options
                 if (opt.value.size() <= min_tokens) 
                 {
-                    min_tokens -= opt.value.size();
+		    min_tokens -= static_cast<unsigned>(opt.value.size());
                 }
                 else
                 {

src/options_description.cpp

@@ -469,7 +469,7 @@ namespace boost { namespace program_options {
                     // Take care to never increment the iterator past
                     // the end, since MSVC 8.0 (brokenly), assumes that
                     // doing that, even if no access happens, is a bug.
-                    unsigned remaining = std::distance(line_begin, par_end);
+                    unsigned remaining = static_cast<unsigned>(std::distance(line_begin, par_end));
                     string::const_iterator line_end = line_begin + 
                         ((remaining < line_length) ? remaining : line_length);
 
@@ -502,8 +502,8 @@ namespace boost { namespace program_options {
 
                     if (first_line)
                     {
-                        indent += par_indent;
-                        line_length -= par_indent; // there's less to work with now
+                        indent += static_cast<unsigned>(par_indent);
+                        line_length -= static_cast<unsigned>(par_indent); // there's less to work with now
                         first_line = false;
                     }
 
@@ -592,7 +592,7 @@ namespace boost { namespace program_options {
                       os.put(' ');
                    }
                 } else {
-                   for(unsigned pad = first_column_width - ss.str().size(); pad > 0; --pad)
+                   for(unsigned pad = first_column_width - static_cast<unsigned>(ss.str().size()); pad > 0; --pad)
                    {
                       os.put(' ');
                    }

src/positional_options.cpp

@@ -34,7 +34,7 @@ namespace boost { namespace program_options {
     positional_options_description::max_total_count() const
     {
         return m_trailing.empty() ? 
-          m_names.size() : (std::numeric_limits<unsigned>::max)();
+          static_cast<unsigned>(m_names.size()) : (std::numeric_limits<unsigned>::max)();
     }
 
     const std::string& 

src/winmain.cpp

@@ -7,6 +7,8 @@
 #include <boost/program_options/parsers.hpp>
 #include <cctype>
 
+using std::size_t;
+
 #ifdef _WIN32
 namespace boost { namespace program_options {
 
@@ -89,7 +91,7 @@ namespace boost { namespace program_options {
     {
         std::vector<std::wstring> result;
         std::vector<std::string> aux = split_winmain(to_internal(cmdline));
-        for (unsigned i = 0, e = aux.size(); i < e; ++i)
+        for (size_t i = 0, e = aux.size(); i < e; ++i)
             result.push_back(from_utf8(aux[i]));
         return result;        
     }