public static void TupleTypeConstructionTest()
{
var builder = new ValueTupleBuilder();
Equal(typeof(ValueTuple), builder.Build());
builder.Add <DateTime>();
Equal(typeof(ValueTuple <DateTime>), builder.Build());
builder.Add <string>();
Equal(typeof(ValueTuple <DateTime, string>), builder.Build());
builder.Add <int>();
Equal(typeof(ValueTuple <DateTime, string, int>), builder.Build());
for (int i = 0; i < 16; i++)
{
builder.Add <bool>();
}
Equal(19, builder.Count);
var tupleType = builder.Build();
Equal(typeof(ValueTuple <, , , , , , ,>), tupleType.GetGenericTypeDefinition());
}
public static void TupleRestTypeConstructionTest()
{
var builder = new ValueTupleBuilder();
Equal(typeof(ValueTuple), builder.Build());
builder.Add <DateTime>();
Equal(typeof(ValueTuple <DateTime>), builder.Build());
builder.Add <string>();
Equal(typeof(ValueTuple <DateTime, string>), builder.Build());
builder.Add <int>();
Equal(typeof(ValueTuple <DateTime, string, int>), builder.Build());
for (int i = 0; i < 5; i++)
{
builder.Add <bool>();
}
Equal(8, builder.Count);
var tupleType = builder.Build();
Equal(typeof(ValueTuple <bool>), tupleType.GetField("Rest")?.FieldType);
var members = builder.Build(Expression.New, out _);
Equal(typeof(DateTime), members[0].Type);
Equal(typeof(bool), members[7].Type);
}
/// <summary>
/// Constructs value tuple.
/// </summary>
/// <returns>Value tuple.</returns>
public Type Build()
{
switch (Count)
{
case 0:
return(typeof(ValueTuple));
case 1:
return(typeof(ValueTuple <>).MakeGenericType(items[0]));
case 2:
return(typeof(ValueTuple <,>).MakeGenericType(items[0], items[1]));
case 3:
return(typeof(ValueTuple <, ,>).MakeGenericType(items[0], items[1], items[2]));
case 4:
return(typeof(ValueTuple <, , ,>).MakeGenericType(items[0], items[1], items[2], items[3]));
case 5:
return(typeof(ValueTuple <, , , ,>).MakeGenericType(items[0], items[1], items[2], items[3], items[4]));
case 6:
return(typeof(ValueTuple <, , , , ,>).MakeGenericType(items[0], items[1], items[2], items[3], items[4], items[5]));
case 7:
return(typeof(ValueTuple <, , , , , ,>).MakeGenericType(items[0], items[1], items[2], items[3], items[4], items[5], items[6]));
default:
return(typeof(ValueTuple <, , , , , , ,>).MakeGenericType(items[0], items[1], items[2], items[3], items[4], items[5], items[6], Rest.Build()));
}
}
