Allow overloading keywords with different signatures

[libs/datafile.git] / source / loaderaction.h

diff --git a/source/loaderaction.h b/source/loaderaction.h
index 6eebeccc76f47c8144fac9f5ceeb93a35dff0a93..cfbe281f399c4071df30e12b17f53f6d99843d18 100644 (file)
--- a/source/loaderaction.h
+++ b/source/loaderaction.h
@@ -28,6 +28,8 @@ public:
 
        /** Called to process a statement. */
        virtual void execute(Loader &, const Statement &) const = 0;
+
+       virtual std::string get_signature() const = 0;
 };
 
 
@@ -50,6 +52,9 @@ public:
                if(st.args.size()!=0) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)();
        };
+
+       virtual std::string get_signature() const
+       { return std::string(); }
 };
 
 
@@ -72,6 +77,9 @@ public:
                if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>());
        }
+
+       virtual std::string get_signature() const
+       { return std::string(1, TypeInfo<A0>::signature); }
 };
 
 
@@ -97,6 +105,14 @@ public:
                        values.push_back(i->get<A0>());
                (dynamic_cast<L &>(l).*func)(values);
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<A0>::signature;
+               result += '*';
+               return result;
+       }
 };
 
 
@@ -118,6 +134,9 @@ public:
        {
                (dynamic_cast<L &>(l).*func)(st);
        }
+
+       virtual std::string get_signature() const
+       { return "*"; }
 };
 
 
@@ -137,6 +156,14 @@ public:
                if(st.args.size()!=2) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>());
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<A0>::signature;
+               result += TypeInfo<A1>::signature;
+               return result;
+       }
 };
 
 
@@ -156,6 +183,15 @@ public:
                if(st.args.size()!=3) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>());
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<A0>::signature;
+               result += TypeInfo<A1>::signature;
+               result += TypeInfo<A2>::signature;
+               return result;
+       }
 };
 
 
@@ -175,6 +211,16 @@ public:
                if(st.args.size()!=4) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>());
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<A0>::signature;
+               result += TypeInfo<A1>::signature;
+               result += TypeInfo<A2>::signature;
+               result += TypeInfo<A3>::signature;
+               return result;
+       }
 };
 
 
@@ -194,6 +240,17 @@ public:
                if(st.args.size()!=5) throw TypeError("Wrong number of arguments");
                (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>(), st.args[4].get<A4>());
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<A0>::signature;
+               result += TypeInfo<A1>::signature;
+               result += TypeInfo<A2>::signature;
+               result += TypeInfo<A3>::signature;
+               result += TypeInfo<A4>::signature;
+               return result;
+       }
 };
 
 
@@ -213,6 +270,9 @@ public:
                if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
                dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
        }
+
+       virtual std::string get_signature() const
+       { return std::string(1, TypeInfo<T0>::signature); }
 };
 
 
@@ -233,6 +293,9 @@ public:
                typename L::Loader &ldr=dynamic_cast<typename L::Loader &>(l);
                ldr.get_object().*ptr0=ldr.get_collection().template get<T0>(st.args[0].get<std::string>());
        }
+
+       virtual std::string get_signature() const
+       { return std::string(1, TypeInfo<std::string>::signature); }
 };
 
 
@@ -255,6 +318,14 @@ public:
                dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
                dynamic_cast<typename L::Loader &>(l).get_object().*ptr1=st.args[1].get<T1>();
        }
+
+       virtual std::string get_signature() const
+       {
+               std::string result;
+               result += TypeInfo<T0>::signature;
+               result += TypeInfo<T1>::signature;
+               return result;
+       }
 };
 
 } // namespace DataFile