1 files changed, 65 insertions, 0 deletions
diff --git a/libcult/cult/cli/mapper.hxx.m4 b/libcult/cult/cli/mapper.hxx.m4
new file mode 100644
index 0000000..7ac6760
--- /dev/null
+++ b/libcult/cult/cli/mapper.hxx.m4
@@ -0,0 +1,65 @@
+divert(-1)
+
+# file      : cult/cli/mapper.hxx.m4
+# author    : Boris Kolpackov <boris@kolpackov.net>
+# copyright : Copyright (c) 2005-2010 Boris Kolpackov
+# license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+define(`N', 100)
+
+define(`forloop',
+  `pushdef(`$1', `$2')_forloop(`$1', `$2', `$3', `$4')popdef(`$1')')
+
+define(`_forloop',
+  `$4`'ifelse($1, `$3', ,
+    `define(`$1', incr($1))_forloop(`$1', `$2', `$3', `$4')')')
+
+define(`specialization',`
+template
+<
+forloop(`i', 1, $1, `  char const* x`'i, typename Y`'i`'ifelse(i, $1, ,`,')
+')dnl
+>
+struct Mapper
+<
+forloop(`i', 1, $1, `  x`'i, Y`'i,
+')dnl
+forloop(`i', $1, N, `  null, Null`'ifelse(i, N, ,`,')
+')dnl
+>
+{
+`#ifdef __GNUC__'
+forloop(`i', 1, $1, `  static Y`'i f (Tag<x`'i>*);
+')dnl
+
+  template <char const* x>
+  struct Selector
+  {
+    typedef typeof (Mapper::f ((Tag<x>*) (0))) Type;
+  };
+`#else'
+  template <char const* x>
+  struct Selector
+  {
+    typedef typename if_<same<x, x1>::r, Y1,ifelse($1, 1, ` Void', `
+    typename Mapper
+    <
+forloop(`i', 2, $1, `      x`'i, Y`'i`'ifelse(i, $1, ,`,')
+')    >::template Selector<x>::Type')>::Type Type;
+  };
+`#endif'
+};
+')
+
+divert(0)dnl
+
+template
+<
+forloop(`i', 1, incr(N),
+  `  char const* x`'i`'ifelse(i, 1, ,`= null'), dnl
+typename Y`'i`'ifelse(i, 1, ,`= Null')`'ifelse(i, incr(N), ,`,')
+')dnl
+>
+struct Mapper;
+
+forloop(`n', 1, N, `specialization(n)')