From fcf99bf7889ab33d8be84504378c32865f4a60f3 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Wed, 10 Jul 2013 17:57:05 -0300
Subject: [PATCH] 'math.isfloat' replaced by 'debug.subtype'

---
 ldblib.c   | 35 ++++++++++++++++++++++++++++++++++-
 lmathlib.c | 10 +---------
 2 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/ldblib.c b/ldblib.c
index 0e761aee..9da5e49f 100644
--- a/ldblib.c
+++ b/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.132 2012/01/19 20:14:44 roberto Exp roberto $
+** $Id: ldblib.c,v 1.133 2013/06/25 19:37:00 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -34,6 +34,38 @@ static int db_numbits (lua_State *L) {
 }
 
 
+static int db_subtype (lua_State *L) {
+  int tp = lua_type(L, 1);
+  switch (tp) {
+    case LUA_TNONE:
+      luaL_checkany(L, 1);
+      break;
+    case LUA_TNUMBER:
+      if (lua_isinteger(L, 1))
+        lua_pushliteral(L, "integer"); 
+      else
+        lua_pushliteral(L, "float"); 
+      break;
+    case LUA_TFUNCTION:
+      if (lua_iscfunction(L, 1))
+        lua_pushliteral(L, "Cfunction"); 
+      else
+        lua_pushliteral(L, "Luafunction"); 
+      break;
+    case LUA_TUSERDATA:
+      if (lua_islightuserdata(L, 1))
+        lua_pushliteral(L, "lightudata"); 
+      else
+        lua_pushliteral(L, "fulludata"); 
+      break;
+    default:
+      lua_pushstring(L, lua_typename(L, tp));
+      break;
+  }
+  return 1;
+}
+
+
 static int db_getregistry (lua_State *L) {
   lua_pushvalue(L, LUA_REGISTRYINDEX);
   return 1;
@@ -399,6 +431,7 @@ static const luaL_Reg dblib[] = {
   {"setlocal", db_setlocal},
   {"setmetatable", db_setmetatable},
   {"setupvalue", db_setupvalue},
+  {"subtype", db_subtype},
   {"traceback", db_traceback},
   {NULL, NULL}
 };
diff --git a/lmathlib.c b/lmathlib.c
index 629f7c36..a90133c8 100644
--- a/lmathlib.c
+++ b/lmathlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.89 2013/06/25 19:37:00 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.90 2013/07/03 17:23:19 roberto Exp roberto $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -251,13 +251,6 @@ static int math_randomseed (lua_State *L) {
 }
 
 
-static int math_isfloat (lua_State *L) {
-  luaL_checkany(L, 1);
-  lua_pushboolean(L, (lua_type(L, 1) == LUA_TNUMBER && !lua_isinteger(L, 1)));
-  return 1;
-}
-
-
 static const luaL_Reg mathlib[] = {
   {"abs",   math_abs},
   {"acos",  math_acos},
@@ -273,7 +266,6 @@ static const luaL_Reg mathlib[] = {
   {"ifloor", math_ifloor},
   {"fmod",   math_fmod},
   {"frexp", math_frexp},
-  {"isfloat", math_isfloat},
   {"ldexp", math_ldexp},
 #if defined(LUA_COMPAT_LOG10)
   {"log10", math_log10},