| public static AreEquivalent ( Type t1, Type t2 ) : bool | ||
| t1 | Type | |
| t2 | Type | |
| return | bool | |
internal static MethodInfo FindConversionOperator(MethodInfo[] methods, Type typeFrom, Type typeTo, bool implicitOnly)
{
foreach (MethodInfo mi in methods)
{
if (mi.Name != "op_Implicit" && (implicitOnly || mi.Name != "op_Explicit"))
{
continue;
}
if (!TypeUtils.AreEquivalent(mi.ReturnType, typeTo))
{
continue;
}
ParameterInfo[] pis = mi.GetParametersCached();
if (!TypeUtils.AreEquivalent(pis[0].ParameterType, typeFrom))
{
continue;
}
return(mi);
}
return(null);
}
internal static MethodInfo GetUserDefinedCoercionMethod(Type convertFrom, Type convertToType, bool implicitOnly)
{
// check for implicit coercions first
Type nnExprType = TypeUtils.GetNonNullableType(convertFrom);
Type nnConvType = TypeUtils.GetNonNullableType(convertToType);
// try exact match on types
MethodInfo[] eMethods = nnExprType.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
MethodInfo method = FindConversionOperator(eMethods, convertFrom, convertToType, implicitOnly);
if (method != null)
{
return(method);
}
MethodInfo[] cMethods = nnConvType.GetMethods(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
method = FindConversionOperator(cMethods, convertFrom, convertToType, implicitOnly);
if (method != null)
{
return(method);
}
// try lifted conversion
if (!TypeUtils.AreEquivalent(nnExprType, convertFrom) ||
!TypeUtils.AreEquivalent(nnConvType, convertToType))
{
method = FindConversionOperator(eMethods, nnExprType, nnConvType, implicitOnly);
if (method == null)
{
method = FindConversionOperator(cMethods, nnExprType, nnConvType, implicitOnly);
}
if (method != null)
{
return(method);
}
}
return(null);
}