public static DuckValueBindingOption TryBind(Type fromType, Type toType)
{
Type coreFromType = Nullable.GetUnderlyingType(fromType);
Type coreToType = Nullable.GetUnderlyingType(toType);
// Cannot convert a nullable value type to a non-nullable value type
if (coreFromType != null && coreToType == null && toType.IsValueType())
{
return(null);
}
Type finalFromType = coreFromType ?? fromType;
Type finalToType = coreToType ?? toType;
var method = finalFromType.GetMethod("op_Implicit", new[] { finalFromType });
if (method == null)
{
method = finalToType.GetMethod("op_Implicit", new[] { finalFromType });
if (method == null)
{
return(null);
}
}
DuckValueBindingOption userConvBinding = new ImplicitUserConversionValueBinding(method);
return(coreFromType != null ? new ImplicitNullableValueBinding(true, fromType, toType, coreToType, userConvBinding) : userConvBinding);
}
public static DuckValueBindingOption Get(Type fromType, Type toType)
{
return(IdentityValueBinding.TryBind(fromType, toType)
?? ImplicitNumericValueBinding.TryBind(fromType, toType)
?? ImplicitNullableValueBinding.TryBind(fromType, toType)
?? ImplicitReferenceValueBinding.TryBind(fromType, toType)
?? ImplicitUserConversionValueBinding.TryBind(fromType, toType)
?? DuckCastValueBinding.TryBind(fromType, toType)
?? NotBindable);
}
public static DuckValueBindingOption TryBind(Type fromType, Type toType)
{
Type coreFromType = Nullable.GetUnderlyingType(fromType);
Type coreToType = Nullable.GetUnderlyingType(toType);
// Cannot convert a nullable value type to a non-nullable value type
if (coreFromType!=null && coreToType==null && toType.IsValueType)
return null;
Type finalFromType = coreFromType ?? fromType;
Type finalToType = coreToType ?? toType;
var method = finalFromType.GetMethod("op_Implicit", BindingFlags.Public | BindingFlags.Static, null, new[] {finalFromType}, null);
if (method==null)
{
method = finalToType.GetMethod("op_Implicit", BindingFlags.Public | BindingFlags.Static, null, new[] {finalFromType}, null);
if (method==null)
return null;
}
DuckValueBindingOption userConvBinding = new ImplicitUserConversionValueBinding(method);
return coreFromType!=null ? new ImplicitNullableValueBinding(true, fromType, toType, coreToType, userConvBinding) : userConvBinding;
}