Merge pull request #217 from cppalliance/198

Make random optional

Author: mborland

CMakeLists.txt

@@ -16,7 +16,6 @@ target_link_libraries(boost_safe_numbers
         INTERFACE
         Boost::charconv
         Boost::core
-        Boost::random
         Boost::throw_exception
 )
 

include/boost/safe_numbers/fmt_format.hpp

@@ -11,7 +11,11 @@
 
 #ifndef BOOST_SAFE_NUMBERS_BUILD_MODULE
 
-#include <fmt/format.h>
+#if __has_include(<fmt/format.h>)
+#  include <fmt/format.h>
+#else
+#  error "{fmt} is required in order to use this header"
+#endif
 
 #endif // BOOST_SAFE_NUMBERS_BUILD_MODULE
 

include/boost/safe_numbers/random.hpp

@@ -23,7 +23,11 @@
 #pragma clang diagnostic ignored "-Wold-style-cast"
 #endif
 
-#include <boost/random/uniform_int_distribution.hpp>
+#if __has_include(<boost/random/uniform_int_distribution.hpp>)
+#  include <boost/random/uniform_int_distribution.hpp>
+#else
+#  error "Boost.Random is required to use this file"
+#endif
 
 #endif