From 9fc43cff4d27b32577d4943878f8d0fde3e219d6 Mon Sep 17 00:00:00 2001
From: lethosor <lethosor@gmail.com>
Date: Sat, 28 May 2016 20:11:42 -0400
Subject: [PATCH] Make const method wrappers possible

Reverts ae3052f
Ref #935
---
 library/include/DataFuncs.h                       | 15 +++++++++++++++
 .../knowledge_scholar_category_flag.methods.inc   |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/library/include/DataFuncs.h b/library/include/DataFuncs.h
index cd178263c..bf8e6b244 100644
--- a/library/include/DataFuncs.h
+++ b/library/include/DataFuncs.h
@@ -83,6 +83,11 @@ namespace df {
         typedef RT type; \
         typedef CT class_type; \
         static const bool is_method = true; \
+    }; \
+    template<FW_TARGSC class RT, class CT> struct return_type<RT (CT::*) FArgs const> { \
+        typedef RT type; \
+        typedef CT class_type; \
+        static const bool is_method = true; \
     };
 
 #define INSTANTIATE_WRAPPERS2(Count, FArgs, Args, Loads) \
@@ -99,10 +104,20 @@ namespace df {
         static void execute(lua_State *state, int base, void (CT::*cb) FArgs) { \
             LOAD_CLASS() Loads; INVOKE_VOID((self->*cb) Args); } \
     }; \
+    template<FW_TARGSC class CT> struct function_wrapper<void (CT::*) FArgs const, true> { \
+        static const int num_args = Count+1; \
+        static void execute(lua_State *state, int base, void (CT::*cb) FArgs const) { \
+            LOAD_CLASS() Loads; INVOKE_VOID((self->*cb) Args); } \
+    }; \
     template<FW_TARGSC class RT, class CT> struct function_wrapper<RT (CT::*) FArgs, false> { \
         static const int num_args = Count+1; \
         static void execute(lua_State *state, int base, RT (CT::*cb) FArgs) { \
             LOAD_CLASS(); Loads; INVOKE_RV((self->*cb) Args); } \
+    }; \
+    template<FW_TARGSC class RT, class CT> struct function_wrapper<RT (CT::*) FArgs const, false> { \
+        static const int num_args = Count+1; \
+        static void execute(lua_State *state, int base, RT (CT::*cb) FArgs const) { \
+            LOAD_CLASS(); Loads; INVOKE_RV((self->*cb) Args); } \
     };
 
 #define INSTANTIATE_WRAPPERS(Count, FArgs, OFArgs, Args, OArgs, Loads) \
diff --git a/library/include/df/custom/knowledge_scholar_category_flag.methods.inc b/library/include/df/custom/knowledge_scholar_category_flag.methods.inc
index 6fe896804..f5c4e9a76 100644
--- a/library/include/df/custom/knowledge_scholar_category_flag.methods.inc
+++ b/library/include/df/custom/knowledge_scholar_category_flag.methods.inc
@@ -1,4 +1,4 @@
-df::enums::dfhack_knowledge_scholar_flag::dfhack_knowledge_scholar_flag value()
+df::enums::dfhack_knowledge_scholar_flag::dfhack_knowledge_scholar_flag value() const
 {
     int32_t value = category * 32;
     for (int32_t i = 0; i < 32; i++)