public void TestBinder()
{
Binder binder = new ImplicitMethodBinder(typeof (Class01), typeof (Class02));
MethodInfo methodInfo = typeof (Class01).GetMethod(METHOD, BindingFlags.Public | BindingFlags.Static, binder, new[] {typeof (Class01)}, null);
Assert.Null(methodInfo, METHOD_MUST_NOT_EXIST);
methodInfo = typeof (Class01).GetMethod(METHOD, BindingFlags.Public | BindingFlags.Static, binder, new[] {typeof (Class02)}, null);
Assert.Null(methodInfo, METHOD_MUST_NOT_EXIST);
methodInfo = typeof (Class02).GetMethod(METHOD, BindingFlags.Public | BindingFlags.Static, binder, new[] {typeof (Class01)}, null);
Assert.NotNull(methodInfo, METHOD_MUST_EXIST);
methodInfo = typeof (Class02).GetMethod(METHOD, BindingFlags.Public | BindingFlags.Static, binder, new[] {typeof (Class02)}, null);
Assert.NotNull(methodInfo, METHOD_MUST_EXIST);
}
/// <summary>
/// Gets the converter between the source and destination type.
/// </summary>
internal static MethodInfo GetConverter (Type sourceType, Type targetType)
{
// Dereference enumerations
if (sourceType.IsEnum) {
sourceType = Enum.GetUnderlyingType (sourceType);
}
if (targetType.IsEnum) {
targetType = Enum.GetUnderlyingType (targetType);
}
// If the types are equivalent, return
if (sourceType == targetType) {
return null;
}
// Process well-known conversion first);
if (sourceType == typeof(int) && targetType == typeof(long)) {
return INT_2_LONG;
}
if (sourceType == typeof(long) && targetType == typeof(int)) {
return LONG_2_INT;
}
if (sourceType == typeof(uint) && targetType == typeof(ulong)) {
return UINT_2_ULONG;
}
if (sourceType == typeof(ulong) && targetType == typeof(uint)) {
return ULONG_2_UINT;
}
if (sourceType == typeof(float) && targetType == typeof(int)) {
return FLOAT_2_INT;
}
if (sourceType == typeof(int) && targetType == typeof(float)) {
return INT_2_FLOAT;
}
if (sourceType == typeof(float) && targetType == typeof(uint)) {
return FLOAT_2_UINT;
}
if (sourceType == typeof(uint) && targetType == typeof(float)) {
return UINT_2_FLOAT;
}
if (sourceType == typeof(float) && targetType == typeof(long)) {
return FLOAT_2_LONG;
}
if (sourceType == typeof(long) && targetType == typeof(float)) {
return LONG_2_FLOAT;
}
if (sourceType == typeof(float) && targetType == typeof(ulong)) {
return FLOAT_2_ULONG;
}
if (sourceType == typeof(ulong) && targetType == typeof(float)) {
return ULONG_2_FLOAT;
}
if (sourceType == typeof(float) && targetType == typeof(double)) {
return FLOAT_2_DOUBLE;
}
if (sourceType == typeof(double) && targetType == typeof(float)) {
return DOUBLE_2_FLOAT;
}
// Process value-type conversion
if (sourceType.IsValueType && targetType.IsValueType) {
Binder binder = new ImplicitMethodBinder (sourceType, targetType);
MethodInfo converter = sourceType.GetMethod ("op_Implicit", BindingFlags.Public | BindingFlags.Static, binder, new[] {sourceType}, null) ??
targetType.GetMethod ("op_Implicit", BindingFlags.Public | BindingFlags.Static, binder, new[] {sourceType}, null);
if (converter != null) {
return converter;
}
}
throw new NotSupportedException (String.Format (Resources.CannotFindAConverter, sourceType, targetType));
}
public static void CastValueType (ILGenerator generator, Type sourceType, Type targetType)
{
if (sourceType.Equals (targetType)) {
return;
}
if (sourceType.IsEnum) {
Type baseType = Enum.GetUnderlyingType (sourceType);
if (!baseType.Equals (targetType)) {
if (targetType == typeof(long) && baseType == typeof(int)) {
generator.Emit (OpCodes.Conv_I8);
} else if (targetType == typeof(ulong) && baseType == typeof(uint)) {
generator.Emit (OpCodes.Conv_U8);
} else {
throw new NotSupportedException ("1. Cannot cast from " + sourceType + " to " + targetType);
}
}
} else if (targetType.IsEnum) {
Type baseType = Enum.GetUnderlyingType (targetType);
if (!baseType.Equals (sourceType)) {
if (sourceType == typeof(long) && baseType == typeof(int)) {
generator.Emit (OpCodes.Conv_I4);
} else if (sourceType == typeof(ulong) && baseType == typeof(uint)) {
generator.Emit (OpCodes.Conv_U4);
} else {
throw new NotSupportedException ("2. Cannot cast from " + sourceType + " to " + targetType);
}
}
} else {
Binder binder = new ImplicitMethodBinder (sourceType, targetType);
MethodInfo converter = sourceType.GetMethod ("op_Implicit", BindingFlags.Public | BindingFlags.Static, binder, new[] {sourceType}, null) ??
targetType.GetMethod ("op_Implicit", BindingFlags.Public | BindingFlags.Static, binder, new[] {sourceType}, null);
if (converter != null) {
generator.Emit (OpCodes.Call, converter);
} else {
throw new NotSupportedException ("3. Cannot cast from " + sourceType + " to " + targetType);
}
}
}
