// Reduce IL2CPP code generate size(don't write long code in <T>)
internal static object GetFormatter(Type t)
{
if (t.IsArray)
{
var rank = t.GetArrayRank();
if (rank == 1)
{
if (t.GetElementType() == typeof(byte)) // byte[] is also supported in builtin formatter.
{
return(ByteArrayFormatter.Default);
}
return(Activator.CreateInstance(typeof(ArrayFormatter <>).MakeGenericType(t.GetElementType())));
}
if (rank == 2)
{
return(Activator.CreateInstance(typeof(TwoDimensionalArrayFormatter <>).MakeGenericType(t.GetElementType())));
}
if (rank == 3)
{
return(Activator.CreateInstance(typeof(ThreeDimensionalArrayFormatter <>).MakeGenericType(t.GetElementType())));
}
if (rank == 4)
{
return(Activator.CreateInstance(typeof(FourDimensionalArrayFormatter <>).MakeGenericType(t.GetElementType())));
}
return(null); // not supported built-in
}
if (t.IsGenericType)
{
var genericType = t.GetGenericTypeDefinition();
var isNullable = ReflectionExtensions.IsNullable(genericType);
var nullableElementType = isNullable ? t.GenericTypeArguments[0] : null;
if (genericType == typeof(KeyValuePair <,>))
{
return(CreateInstance(typeof(KeyValuePairFormatter <,>), t.GenericTypeArguments));
}
if (isNullable && nullableElementType.IsConstructedGenericType &&
nullableElementType.GetGenericTypeDefinition() == typeof(KeyValuePair <,>))
{
return(CreateInstance(typeof(NullableFormatter <>), new[] { nullableElementType }));
}
#if NETSTANDARD2_1
// ValueTask
if (genericType == typeof(ValueTask <>))
{
return(CreateInstance(typeof(ValueTaskFormatter <>), t.GenericTypeArguments));
}
if (isNullable && nullableElementType.IsConstructedGenericType && nullableElementType.GetGenericTypeDefinition() == typeof(ValueTask <>))
{
return(CreateInstance(typeof(NullableFormatter <>), new[] { nullableElementType }));
}
#endif
// Tuple
if (t.FullName.StartsWith("System.Tuple"))
{
Type tupleFormatterType = null;
switch (t.GenericTypeArguments.Length)
{
case 1:
tupleFormatterType = typeof(TupleFormatter <>);
break;
case 2:
tupleFormatterType = typeof(TupleFormatter <,>);
break;
case 3:
tupleFormatterType = typeof(TupleFormatter <, ,>);
break;
case 4:
tupleFormatterType = typeof(TupleFormatter <, , ,>);
break;
case 5:
tupleFormatterType = typeof(TupleFormatter <, , , ,>);
break;
case 6:
tupleFormatterType = typeof(TupleFormatter <, , , , ,>);
break;
case 7:
tupleFormatterType = typeof(TupleFormatter <, , , , , ,>);
break;
case 8:
tupleFormatterType = typeof(TupleFormatter <, , , , , , ,>);
break;
default:
break;
}
return(CreateInstance(tupleFormatterType, t.GenericTypeArguments));
}
#if NETSTANDARD
// ValueTuple
if (t.FullName.StartsWith("System.ValueTuple"))
{
Type tupleFormatterType = null;
switch (t.GenericTypeArguments.Length)
{
case 1:
tupleFormatterType = typeof(ValueTupleFormatter <>);
break;
case 2:
tupleFormatterType = typeof(ValueTupleFormatter <,>);
break;
case 3:
tupleFormatterType = typeof(ValueTupleFormatter <, ,>);
break;
case 4:
tupleFormatterType = typeof(ValueTupleFormatter <, , ,>);
break;
case 5:
tupleFormatterType = typeof(ValueTupleFormatter <, , , ,>);
break;
case 6:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , ,>);
break;
case 7:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , , ,>);
break;
case 8:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , , , ,>);
break;
default:
break;
}
return(CreateInstance(tupleFormatterType, t.GenericTypeArguments));
}
// Nullable ValueTuple
if (isNullable && nullableElementType.IsConstructedGenericType &&
nullableElementType.FullName.StartsWith("System.ValueTuple"))
{
Type tupleFormatterType = null;
switch (nullableElementType.GenericTypeArguments.Length)
{
case 1:
tupleFormatterType = typeof(ValueTupleFormatter <>);
break;
case 2:
tupleFormatterType = typeof(ValueTupleFormatter <,>);
break;
case 3:
tupleFormatterType = typeof(ValueTupleFormatter <, ,>);
break;
case 4:
tupleFormatterType = typeof(ValueTupleFormatter <, , ,>);
break;
case 5:
tupleFormatterType = typeof(ValueTupleFormatter <, , , ,>);
break;
case 6:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , ,>);
break;
case 7:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , , ,>);
break;
case 8:
tupleFormatterType = typeof(ValueTupleFormatter <, , , , , , ,>);
break;
default:
break;
}
var tupleFormatter = CreateInstance(tupleFormatterType, nullableElementType.GenericTypeArguments);
return(CreateInstance(typeof(StaticNullableFormatter <>), new[] { nullableElementType }, tupleFormatter));
}
#endif
// ArraySegment
if (genericType == typeof(ArraySegment <>))
{
if (t.GenericTypeArguments[0] == typeof(byte))
{
return(ByteArraySegmentFormatter.Default);
}
return(CreateInstance(typeof(ArraySegmentFormatter <>), t.GenericTypeArguments));
}
if (isNullable && nullableElementType.IsConstructedGenericType &&
nullableElementType.GetGenericTypeDefinition() == typeof(ArraySegment <>))
{
if (nullableElementType == typeof(ArraySegment <byte>))
{
return(new StaticNullableFormatter <ArraySegment <byte> >(ByteArraySegmentFormatter.Default));
}
return(CreateInstance(typeof(NullableFormatter <>), new[] { nullableElementType }));
}
// Mapped formatter
if (FormatterMap.TryGetValue(genericType, out var formatterType))
{
return(CreateInstance(formatterType, t.GenericTypeArguments));
}
// generic collection
if (t.GenericTypeArguments.Length == 1 &&
t.GetInterfaces().Any(x => x.IsConstructedGenericType && x.GetGenericTypeDefinition() == typeof(ICollection <>)) &&
t.GetDeclaredConstructors().Any(x => x.GetParameters().Length == 0))
{
var elemType = t.GenericTypeArguments[0];
return(CreateInstance(typeof(GenericCollectionFormatter <,>), new[] { elemType, t }));
}
// generic dictionary
if (t.GenericTypeArguments.Length == 2 &&
t.GetInterfaces().Any(x => x.IsConstructedGenericType && x.GetGenericTypeDefinition() == typeof(IDictionary <,>)) &&
t.GetDeclaredConstructors().Any(x => x.GetParameters().Length == 0))
{
var keyType = t.GenericTypeArguments[0];
var valueType = t.GenericTypeArguments[1];
return(CreateInstance(typeof(GenericDictionaryFormatter <, ,>), new[] { keyType, valueType, t }));
}
}
else
{
// NonGeneric Collection
if (t == typeof(IEnumerable))
{
return(NonGenericInterfaceEnumerableFormatter.Default);
}
if (t == typeof(ICollection))
{
return(NonGenericInterfaceCollectionFormatter.Default);
}
if (t == typeof(IList))
{
return(NonGenericInterfaceListFormatter.Default);
}
if (t == typeof(IDictionary))
{
return(NonGenericInterfaceDictionaryFormatter.Default);
}
if (typeof(IList).IsAssignableFrom(t) && t.GetDeclaredConstructors().Any(x => x.GetParameters().Length == 0))
{
return(Activator.CreateInstance(typeof(NonGenericListFormatter <>).MakeGenericType(t)));
}
if (typeof(IDictionary).IsAssignableFrom(t) && t.GetDeclaredConstructors().Any(x => x.GetParameters().Length == 0))
{
return(Activator.CreateInstance(typeof(NonGenericDictionaryFormatter <>).MakeGenericType(t)));
}
}
return(null);
}
