Re: [boost] [typeof] Variadic functions

21 Jan 2010

Privet Sergey,
Po standartu kazhetsja zpt mozhno ne statit' pered ...
Nu a esli nado, to est' BOOST_PP_COMMA_IF(n)

Sergey Zubkovsky wrote:
...
Hi,
Here is a patch to support variadic functions in the Boost.Typeof.
Can anyone check it and commit?
Thank you.

...
Index: register_functions.hpp
===================================================================

--- register_functions.hpp	(revision 57837)
+++ register_functions.hpp	(working copy)
@@ -18,18 +18,25 @@
 #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
#ifndef BOOST_TYPEOF_LIMIT_FUNCTION_ARITY
-#define BOOST_TYPEOF_LIMIT_FUNCTION_ARITY 10
+#define BOOST_TYPEOF_LIMIT_FUNCTION_ARITY 15
 #endif
enum 
 {
     FUN_ID                          = BOOST_TYPEOF_UNIQUE_ID(),
-    FUN_PTR_ID                      = FUN_ID + 1 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
-    FUN_REF_ID                      = FUN_ID + 2 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
-    MEM_FUN_ID                      = FUN_ID + 3 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
-    CONST_MEM_FUN_ID                = FUN_ID + 4 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
-    VOLATILE_MEM_FUN_ID             = FUN_ID + 5 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
-    VOLATILE_CONST_MEM_FUN_ID       = FUN_ID + 6 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY)
+    FUN_VAR_ID                      = FUN_ID +  1 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    FUN_PTR_ID                      = FUN_ID +  2 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    FUN_VAR_PTR_ID                  = FUN_ID +  3 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    FUN_REF_ID                      = FUN_ID +  4 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    FUN_VAR_REF_ID                  = FUN_ID +  5 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    MEM_FUN_ID                      = FUN_ID +  6 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    MEM_FUN_VAR_ID                  = FUN_ID +  7 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    CONST_MEM_FUN_ID                = FUN_ID +  8 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    CONST_MEM_FUN_VAR_ID            = FUN_ID +  9 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    VOLATILE_MEM_FUN_ID             = FUN_ID + 10 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    VOLATILE_MEM_FUN_VAR_ID         = FUN_ID + 11 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    VOLATILE_CONST_MEM_FUN_ID       = FUN_ID + 12 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY),
+    VOLATILE_CONST_MEM_FUN_VAR_ID   = FUN_ID + 13 * BOOST_PP_INC(BOOST_TYPEOF_LIMIT_FUNCTION_ARITY)    
 };
BOOST_TYPEOF_BEGIN_ENCODE_NS
Index: register_functions_iterate.hpp
===================================================================
--- register_functions_iterate.hpp	(revision 57837)
+++ register_functions_iterate.hpp	(working copy)
@@ -6,6 +6,12 @@
#define n BOOST_PP_ITERATION()
+#if ( n > 1 )
+#  define comma ,
+#else
+#  define comma
+#endif
+
 // function pointers
template<class V, class R BOOST_PP_ENUM_TRAILING_PARAMS(n, class P)>
@@ -15,6 +21,13 @@
     typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_PTR_ID + n) type;
 };
+template<class V, class R BOOST_PP_ENUM_TRAILING_PARAMS(n, class P)>
+struct encode_type_impl<V, R(*)(BOOST_PP_ENUM_PARAMS(n, P)comma ...)>
+{
+    typedef R BOOST_PP_CAT(P, n);
+    typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_VAR_PTR_ID + n) type;
+};
+
 template<class Iter>
 struct decode_type_impl<boost::mpl::size_t<FUN_PTR_ID + n>, Iter>
 {
@@ -24,6 +37,15 @@
     typedef BOOST_PP_CAT(iter, BOOST_PP_INC(n)) iter;
 };
+template<class Iter>
+struct decode_type_impl<boost::mpl::size_t<FUN_VAR_PTR_ID + n>, Iter>
+{
+    typedef Iter iter0;
+    BOOST_TYPEOF_DECODE_PARAMS(BOOST_PP_INC(n))
+    typedef BOOST_PP_CAT(p, n)(*type)(BOOST_PP_ENUM_PARAMS(n, p)comma ...);
+    typedef BOOST_PP_CAT(iter, BOOST_PP_INC(n)) iter;
+};
+
 #ifndef BOOST_TYPEOF_NO_FUNCTION_TYPES
// function references
@@ -35,6 +57,13 @@
         typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_REF_ID + n) type;
     };
+    template<class V, class R BOOST_PP_ENUM_TRAILING_PARAMS(n, class P)>
+    struct encode_type_impl<V, R(&)(BOOST_PP_ENUM_PARAMS(n, P)comma ...)>
+    {
+        typedef R BOOST_PP_CAT(P, n);
+        typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_VAR_REF_ID + n) type;
+    };
+
     template<class Iter>
     struct decode_type_impl<boost::mpl::size_t<FUN_REF_ID + n>, Iter>
     {
@@ -53,6 +82,13 @@
         typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_ID + n) type;
     };
+    template<class V, class R BOOST_PP_ENUM_TRAILING_PARAMS(n, class P)>
+    struct encode_type_impl<V, R(BOOST_PP_ENUM_PARAMS(n, P)comma ...)>
+    {
+        typedef R BOOST_PP_CAT(P, n);
+        typedef BOOST_TYPEOF_ENCODE_PARAMS(BOOST_PP_INC(n), FUN_VAR_ID + n) type;
+    };
+
     template<class Iter>
     struct decode_type_impl<boost::mpl::size_t<FUN_ID + n>, Iter>
     {
@@ -62,6 +98,15 @@
         typedef BOOST_PP_CAT(iter, BOOST_PP_INC(n)) iter;
     };
+    template<class Iter>
+    struct decode_type_impl<boost::mpl::size_t<FUN_VAR_ID + n>, Iter>
+    {
+        typedef Iter iter0;
+        BOOST_TYPEOF_DECODE_PARAMS(BOOST_PP_INC(n))
+        typedef BOOST_PP_CAT(p, n)(type)(BOOST_PP_ENUM_PARAMS(n, p)comma ...);
+        typedef BOOST_PP_CAT(iter, BOOST_PP_INC(n)) iter;
+    };
+
 #endif//BOOST_TYPEOF_NO_FUNCTION_TYPES
#ifndef BOOST_TYPEOF_NO_MEMBER_FUNCTION_TYPES
@@ -83,5 +128,6 @@
 #define BOOST_TYPEOF_id VOLATILE_CONST_MEM_FUN_ID
 #include <boost/typeof/register_mem_functions.hpp>
+#undef comma
 #undef n
 #endif
...
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Re: [boost] [typeof] Variadic functions

Alexander Nasonov