private static object ConvertToArray(ElaValue val, Type el)
{
var seq = (IEnumerable <ElaValue>)val.Ref;
var len = 0;
if (val.Ref is ElaList)
{
len = ((ElaList)val.Ref).Length;
}
else if (val.Ref is ElaTuple)
{
len = ((ElaTuple)val.Ref).Length;
}
var arr = Array.CreateInstance(el, len);
var i = 0;
foreach (var e in seq)
{
var o = Convert(e, el);
arr.SetValue(o, i++);
}
return(arr);
}
public void NoOperator(ElaValue value, string op)
{
Fail(ElaRuntimeError.InvalidOp, value.GetTypeName(), op);
}
public void UnknownField(string field, ElaValue given)
{
Fail(ElaRuntimeError.UnknownField, field, given.ToString(), given.GetTypeName());
}
public void InvalidType(string expected, ElaValue given)
{
Fail(ElaRuntimeError.InvalidType, expected, given.GetTypeName());
}
public void InvalidConstructorCode(ElaValue code)
{
Fail(ElaRuntimeError.InvalidConstructorCode, code.I4);
}
public void InvalidTypeCode(ElaValue code)
{
Fail(ElaRuntimeError.InvalidTypeCode, code.I4);
}
public void IndexOutOfRange(ElaValue index, ElaValue obj)
{
Fail(ElaRuntimeError.IndexOutOfRange, index.ToString(), index.GetTypeName(),
obj.ToString(), obj.GetTypeName());
}
public void NotAlgebraicType(ElaValue val)
{
Fail(ElaRuntimeError.NotAlgebraicType, val.GetTypeName());
}
public void InvalidIndexType(ElaValue index)
{
Fail(ElaRuntimeError.InvalidIndexType, index.GetTypeName());
}
public void DivideByZero(ElaValue value)
{
Fail(ElaRuntimeError.DivideByZero, value.ToString(), value.GetTypeName());
}
public void InvalidFormat(string format, ElaValue value)
{
Fail(ElaRuntimeError.InvalidFormat, format, value.ToString(), value.GetTypeName());
}
private static Exception InvalidCast(ElaValue val, System.Type target)
{
return(new InvalidCastException(Strings.GetMessage("InvalidCast", TCF.GetShortForm(val.TypeCode),
target.Name)));
}
private static Exception InvalidCast(ElaValue val, ElaTypeCode type)
{
return(new ElaRuntimeException(ElaRuntimeError.InvalidType, TCF.GetShortForm(type), val.GetTypeName()));
}
public static object Convert(ElaValue val, Type ti)
{
if (ti == typeof(Int32) && val.TypeId == ElaMachine.INT)
{
return(val.I4);
}
else if (ti == typeof(Single) && val.TypeId <= ElaMachine.REA)
{
return(val.GetSingle());
}
else if (ti == typeof(Int64) && val.TypeId <= ElaMachine.LNG)
{
return(val.GetLong());
}
else if (ti == typeof(Double) && val.TypeId <= ElaMachine.DBL)
{
return(val.GetDouble());
}
else if (ti == typeof(Boolean) && val.TypeId == ElaMachine.BYT)
{
return(val.I4 == 1);
}
else if (ti == typeof(String) && val.TypeId == ElaMachine.STR)
{
return(val.DirectGetString());
}
else if (ti == typeof(Char) && val.TypeId == ElaMachine.CHR)
{
return((Char)val.I4);
}
else if (ti == typeof(ElaList) && val.TypeId == ElaMachine.LST)
{
return((ElaList)val.Ref);
}
else if (ti == typeof(ElaRecord) && val.TypeId == ElaMachine.REC)
{
return((ElaRecord)val.Ref);
}
else if (ti == typeof(ElaTuple) && val.TypeId == ElaMachine.TUP)
{
return((ElaTuple)val.Ref);
}
else if (ti == typeof(ElaFunction) && val.TypeId == ElaMachine.FUN)
{
return((ElaFunction)val.Ref);
}
else if (ti == typeof(ElaModule) && val.TypeId == ElaMachine.MOD)
{
return((ElaModule)val.Ref);
}
else if (ti == typeof(ElaUnit) && val.TypeId == ElaMachine.UNI)
{
return(ElaUnit.Instance);
}
else if (ti == typeof(ElaObject))
{
return(val.Ref);
}
else if (ti == typeof(ElaValue))
{
return(val);
}
else if (ti == typeof(Object))
{
return(val.AsObject());
}
else if (val.TypeId == ElaMachine.LAZ)
{
var la = (ElaLazy)val.Ref;
if (la.Evaled)
{
return(Convert(la.Value, ti));
}
else
{
throw InvalidCast(val, TypeToElaTypeCode(ti));
}
}
else if (ti.IsArray)
{
return(ConvertToArray(val, ti.GetElementType()));
}
else if (ti.IsGenericType && ti.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
return(ConvertToArray(val, ti.GetGenericArguments()[0]));
}
else
{
try
{
return(System.Convert.ChangeType(val.Ref, ti));
}
catch (Exception) { }
}
throw InvalidCast(val, TypeToElaTypeCode(ti));
}
public static T Convert <T>(ElaValue val)
{
var ti = typeof(T);
return((T)Convert(val, ti));
}
internal ExecutionResult(ElaValue val)
{
ReturnValue = val;
}