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288
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1 module qt.qtd.MetaMarshall;
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2
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3 import std.traits;
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4
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5 template isQObjectType(T) // is a QObject type that belongs to the library
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6 {
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292
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7 enum isQObjectType = is(T.__isQObjectType);
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288
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8 }
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9
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10 template isObjectType(T) // is a QObject type that belongs to the library
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11 {
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292
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12 enum isObjectType = is(T.__isObjectType);
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288
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13 }
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14
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15 template isValueType(T) // is a QObject type that belongs to the library
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16 {
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17 enum isQObjectType = is(typeof(mixin("T." ~ "__isValueType")));
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18 }
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19
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20 template isNativeType(T) // type that doesn't require conversion i.e. is the same in C++ and D
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21 {
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22 enum isNativeType = isNumeric!T || is(T == bool);
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23 }
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24
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25 // converts an argumnent from C++ to D in qt_metacall
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26 string metaCallArgument(T)(string ptr)
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27 {
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28 static if (isQObjectType!T)
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29 return T.stringof ~ ".__getObject(*cast(void**)(" ~ ptr ~ "))";
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30 else static if (isNativeType!T)
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31 return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
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32 else
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33 return "*(cast(" ~ T.stringof ~ "*)" ~ ptr ~ ")";
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34 //res = T.stringof;
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35 }
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36
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37 // converts a D argument type to C++ for registering in Qt meta system
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38 string qtDeclArg(T)()
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39 {
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40 static if (isQObjectType!T)
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41 return T.stringof ~ "*";
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42 else static if (isNativeType!T)
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43 return T.stringof;
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44 else
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45 return T.stringof;
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46 }
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47
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48 // converts an argument from D to C++ in a signal emitter
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49 string convertSignalArgument(T)(string arg)
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50 {
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51 static if (isQObjectType!T)
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52 return arg ~ ".__nativeId";
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53 else static if (isNativeType!T)
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54 return arg;
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55 else
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56 return arg;
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57 }
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