private static EnumThunkReaderDelegate <EnumType> CreateFindFlagsEnumThunkReader(IReadOnlyList <Tuple <string, object> > names)
{
var thunkReaderRef = typeof(ThunkReader).MakeByRefType();
var underlyingType = Enum.GetUnderlyingType(typeof(EnumType));
var resultValue = "result_value";
var nameToResults =
names
.Select(name =>
NameAutomata <EnumType> .CreateName(
thunkReaderRef,
name.Item1,
emit =>
{
LoadConstantOfType(emit, name.Item2, underlyingType);
emit.LoadLocal(resultValue);
emit.Or();
emit.StoreLocal(resultValue);
}))
.ToList();
var underlyingDefault = underlyingType.DefaultValue();
var ret =
NameAutomata <EnumType> .CreateFold <EnumThunkReaderDelegate <EnumType> >(
thunkReaderRef,
nameToResults,
emit =>
{
emit.DeclareLocal(underlyingType, resultValue);
LoadConstantOfType(emit, Convert.ChangeType(0, underlyingType), underlyingType);
emit.StoreLocal(resultValue);
},
emit =>
{
emit.LoadLocal(resultValue);
emit.Return();
},
true,
true,
false,
defaultValue : underlyingDefault
);
return((EnumThunkReaderDelegate <EnumType>)ret);
}
private static Func <TextReader, EnumType> CreateFindFlagsEnum(IReadOnlyList <Tuple <string, object> > names)
{
var underlyingType = Enum.GetUnderlyingType(typeof(EnumType));
var resultValue = "result_value";
var nameToResults =
names
.Select(name =>
NameAutomata <EnumType> .CreateName(
typeof(TextReader),
name.Item1,
emit =>
{
LoadConstantOfType(emit, name.Item2, underlyingType);
emit.LoadLocal(resultValue);
emit.Or();
emit.StoreLocal(resultValue);
}))
.ToList();
var ret =
NameAutomata <EnumType> .CreateFold <Func <TextReader, EnumType> >(
typeof(TextReader),
nameToResults,
emit =>
{
emit.DeclareLocal(underlyingType, resultValue);
LoadConstantOfType(emit, 0, underlyingType);
emit.StoreLocal(resultValue);
},
emit =>
{
emit.LoadLocal(resultValue);
emit.Return();
},
true,
true,
false,
defaultValue : null
);
return((Func <TextReader, EnumType>)ret);
}
