private static ParamInfo[] PrecomputeTypes(ParameterInfo[] parameterInfos)
{
var precomputed = new ParamInfo[parameterInfos.Length];
bool foundTail = false;
for (int i = parameterInfos.Length - 1; i >= 0; i--)
{
var parameterInfo = parameterInfos[i];
var arg = parameterInfo.ParameterType;
ParamKind kind;
if (arg == typeof(IReadOnlyList <ICommand>))
{
kind = ParamKind.SpecialArguments;
}
else if (arg == typeof(ICommand))
{
kind = ParamKind.NormalCommand;
}
else if (arg.IsArray)
{
kind = ParamKind.NormalArray;
}
else if (arg.IsEnum ||
BasicTypes.Contains(arg) ||
BasicTypes.Contains(UnwrapParamType(arg)))
{
kind = ParamKind.NormalParam;
}
// TODO How to distinguish between special type and dependency?
else if (AdvancedTypes.Contains(arg))
{
kind = ParamKind.NormalParam;
}
else
{
kind = ParamKind.Dependency;
}
if (kind.IsNormal())
{
// If we have the last normal parameter, check if it fits the criteria
// to be extened to a tail string.
// If it does not, we set foundTail to true anyway, since no other
// fitting parameter would be a tail anymore
if (!foundTail && arg == typeof(string))
{
kind = ParamKind.NormalTailString;
}
foundTail = true;
}
precomputed[i] = new ParamInfo(
parameterInfo,
kind,
parameterInfo.IsOptional || parameterInfo.GetCustomAttribute <ParamArrayAttribute>() != null);
}
return(precomputed);
}
private void PrecomputeTypes()
{
for (int i = 0; i < CommandParameter.Length; i++)
{
ref var paramInfo = ref CommandParameter[i];
var arg = paramInfo.Type;
if (arg == typeof(IReadOnlyList <ICommand>))
{
paramInfo.Kind = ParamKind.SpecialArguments;
}
else if (arg == typeof(IReadOnlyList <Type>))
{
paramInfo.Kind = ParamKind.SpecialReturns;
}
else if (arg == typeof(ICommand))
{
paramInfo.Kind = ParamKind.NormalCommand;
}
else if (arg.IsArray)
{
paramInfo.Kind = ParamKind.NormalArray;
}
else if (arg.IsEnum ||
BasicTypes.Contains(arg) ||
BasicTypes.Contains(UnwrapParamType(arg)))
{
paramInfo.Kind = ParamKind.NormalParam;
}
// TODO How to distinguish between special type and dependency?
else if (AdvancedTypes.Contains(arg))
{
paramInfo.Kind = ParamKind.NormalParam;
}
else
{
paramInfo.Kind = ParamKind.Dependency;
}
}
private static ParamInfo[] PrecomputeTypes(ParameterInfo[] parameterInfos)
{
var precomputed = new ParamInfo[parameterInfos.Length];
bool foundTail = false;
for (int i = parameterInfos.Length - 1; i >= 0; i--)
{
var parameterInfo = parameterInfos[i];
var arg = parameterInfo.ParameterType;
ParamKind kind;
if (arg == typeof(IReadOnlyList <ICommand>))
{
kind = ParamKind.SpecialArguments;
}
else if (arg == typeof(ICommand))
{
kind = ParamKind.NormalCommand;
}
else if (arg.IsArray)
{
kind = ParamKind.NormalArray;
}
else if (arg.IsEnum ||
BasicTypes.Contains(arg) ||
BasicTypes.Contains(UnwrapParamType(arg)) ||
AdvancedTypes.Contains(arg) ||
AdvancedTypes.Contains(UnwrapParamType(arg)))
{
kind = ParamKind.NormalParam;
}
// TODO How to distinguish between special type and dependency?
else
{
kind = ParamKind.Dependency;
}
TryFromFn?tryFrom = null;
if (kind == ParamKind.NormalParam || kind == ParamKind.NormalArray)
{
var finalType = arg;
if (kind == ParamKind.NormalArray)
{
finalType = finalType.GetElementType() ?? throw new InvalidOperationException("Not an array?");
}
finalType = UnwrapParamType(finalType);
var method = finalType.GetMethod("TryFrom", BindingFlags.Public | BindingFlags.Static);
if (method != null)
{
if (method.ReturnType == typeof(object))
{
// return directly: (object) -> object
tryFrom = (TryFromFn)method.CreateDelegate(typeof(TryFromFn));
}
else if (method.ReturnType.IsClass)
{
// have: [object]->class
// can be casted with covariance to [object]->object
tryFrom = (TryFromFn)method.CreateDelegate(typeof(Func <,>).MakeGenericType(typeof(object), method.ReturnType));
}
else if (method.ReturnType.IsValueType)
{
