Make dependency on Boost.TypeIndex optional.

tzlaine · Sep 20, 2020 · 675fcd2 · 675fcd2
1 parent 113270d
commit 675fcd2
Show file tree

Hide file tree

Showing 2 changed files with 29 additions and 6 deletions.
diff --git a/include/boost/parser/config.hpp b/include/boost/parser/config.hpp
@@ -32,6 +32,9 @@
     disable the use of concepts, define this macro. */
 #    define BOOST_PARSER_DISABLE_CONCEPTS
 
+/** Define this macro to remove all Boost dependencies from Boost.Parser. */
+#    define BOOST_PARSER_STANDALONE
+
 #else
 
 #    ifdef BOOST_PARSER_NO_RUNTIME_ASSERTIONS
@@ -48,4 +51,10 @@
 #define BOOST_PARSER_USE_CONCEPTS 0
 #endif
 
+#if !defined(BOOST_PARSER_STANDALONE)
+#define BOOST_PARSER_USE_BOOST 1
+#else
+#define BOOST_PARSER_USE_BOOST 0
+#endif
+
 #endif
diff --git a/include/boost/parser/detail/printing_impl.hpp b/include/boost/parser/detail/printing_impl.hpp
@@ -3,11 +3,25 @@
 
 #include <boost/parser/detail/printing.hpp>
 
+#if BOOST_PARSER_USE_BOOST
 #include <boost/type_index.hpp>
+#else
+#include <typeinfo>
+#endif
 
 
 namespace boost { namespace parser { namespace detail {
 
+    template<typename T>
+    auto type_name()
+    {
+#if BOOST_PARSER_USE_BOOST
+        return typeindex::type_id<T>().pretty_name();
+#else
+        return typeid(T).name();
+#endif
+    }
+
     template<typename Parser>
     struct n_aray_parser : std::false_type
     {};
@@ -324,7 +338,7 @@ namespace boost { namespace parser { namespace detail {
         std::ostream & os,
         int components)
     {
-        os << "symbols<" << typeindex::type_id<T>().pretty_name() << ">";
+        os << "symbols<" << detail::type_name<T>() << ">";
     }
 
     template<typename Context, typename Predicate>
@@ -635,8 +649,8 @@ namespace boost { namespace parser { namespace detail {
                 return;
             }
         }
-        os << "uint<" << typeindex::type_id<T>().pretty_name() << ", " << Radix
-           << ", " << MinDigits << ", " << MaxDigits << ">";
+        os << "uint<" << detail::type_name<T>() << ", " << Radix << ", "
+           << MinDigits << ", " << MaxDigits << ">";
         detail::print_expected(context, os, parser.expected_);
     }
 
@@ -672,8 +686,8 @@ namespace boost { namespace parser { namespace detail {
                 return;
             }
         }
-        os << "int<" << typeindex::type_id<T>().pretty_name() << ", " << Radix
-           << ", " << MinDigits << ", " << MaxDigits << ">";
+        os << "int<" << detail::type_name<T>() << ", " << Radix << ", "
+           << MinDigits << ", " << MaxDigits << ">";
         detail::print_expected(context, os, parser.expected_);
     }
 
@@ -714,7 +728,7 @@ namespace boost { namespace parser { namespace detail {
         std::ostream & os,
         int components)
     {
-        os << "float<" << typeindex::type_id<T>().pretty_name() << ">";
+        os << "float<" << detail::type_name<T>() << ">";
     }
 
     template<typename Context>