[REQ] Add support for object properties

[GoogleCodeExporter]

Could it be possible to add support for properties?

As described there: http://lua-users.org/wiki/ObjectProperties

Original issue reported on code.google.com by [email protected] on 1 Apr 2013 at 10:41

[GoogleCodeExporter]

Sorry, forgot to mention: in SLB v3.

Original comment by [email protected] on 1 Apr 2013 at 10:42

[GoogleCodeExporter]

Hi! I did that myself in a lazy way.

for example if you have:

class A
{
public:
    string str;

    string getStr()     { return str; }
    void setStr(const string& str) { this->str = str; }
};

    SLB::Class<A>("Namespace::A")
        .constructor()
        .set("getStr", &A::getStr)
        .set("setStr", &A::setStr)
        .property("str", &A::str)
    ;

then you can use it from lua these ways:

a = A()
a:setStr('123')
print(a:getStr())
a.str = '321'
print(a.str)

with my changes to SLB.cpp you should globally define SLB_OBJECT_PROPERTY so 
that it could be seen from SLB.cpp
and then you can use the following:

a.Str = '456'
print(a.Str)

that is if SLB does not find a property named Str then in searches for 
corresponding functions getStr and setStr

here are my changes to SLB.cpp (changeset:   288:e440976b9f9f)

diff --git a/source/SLB/SLB.cpp b/source/SLB/SLB.cpp
index 5394ab4..63d4a8f 100644
--- a/source/SLB/SLB.cpp
+++ b/source/SLB/SLB.cpp
@@ -342,6 +342,21 @@ namespace SLB {
             prop->get(L,1);
             return 1;
           }
+#ifdef SLB_OBJECT_PROPERTY
+         {
+             auto fkey = String("get") + key;
+             if(getElementsMap().count(fkey))
+             {
+                 auto func = static_cast<const 
FuncCall*>(getElementsMap().at(fkey).get());
+                 if(func)
+                 {
+                     lua_pop(L, 1);
+                     const_cast<FuncCall*>(func)->call(L);
+                     return 1;
+                 }
+             }
+         }
+#endif
         }
       }
       if (result < 1)
@@ -379,6 +394,21 @@ namespace SLB {
         prop->set(L,1);
         return 1;
       }
+#ifdef SLB_OBJECT_PROPERTY
+   {
+       auto fkey = String("set") + key;
+       if(getElementsMap().count(fkey))
+       {
+           auto func = static_cast<const FuncCall*>(getElementsMap().at(fkey).get());
+           if(func)
+           {
+               lua_replace(L, 2);
+               const_cast<FuncCall*>(func)->call(L);
+               return 1;
+           }
+       }
+   }
+#endif
     }
     if (_meta__newindex[type].valid())
     {

Original comment by [email protected] on 7 Aug 2013 at 10:32

Attachments:

• SLB.cpp