private static GraceObject getByteObject(byte b)
{
if (byteObjects[b] == null)
{
byteObjects[b] = GraceNumber.Create((int)b);
}
return(byteObjects[b]);
}
/// <summary>Native method for Grace -</summary>
/// <param name="self">Receiver of the method</param>
/// <param name="other">Argument to the method</param>
private static GraceObject mSubtract(
GraceNumber self,
GraceObject other
)
{
var oth = other.FindNativeParent <GraceNumber>();
return(GraceNumber.Create(self.Value - oth.Value));
}
/// <summary>Native method for Grace ^</summary>
/// <param name="self">Receiver of the method</param>
/// <param name="other">Argument to the method</param>
private static GraceObject mExponentiate(
GraceNumber self,
GraceObject other
)
{
var oth = other.FindNativeParent <GraceNumber>();
return(GraceNumber.Create(self.Value.Exponentiate(oth.Value)));
}
private static GraceObject mDigit(EvaluationContext ctx,
MethodRequest req,
CodepointObject self)
{
// By convention, return -1 for non-numeric codepoints.
if (self.parts[6] == "")
{
return(GraceNumber.Create(-1));
}
return(GraceNumber.Create(int.Parse(self.parts[6])));
}
/// <summary>Native method for Grace /</summary>
/// <param name="ctx">Current interpreter</param>
/// <param name="self">Receiver of the method</param>
/// <param name="other">Argument to the method</param>
private static GraceObject mDivide(
EvaluationContext ctx,
GraceNumber self,
GraceObject other
)
{
var oth = other.FindNativeParent <GraceNumber>();
if (oth.Value == Rational.Zero)
{
ErrorReporting.RaiseError(ctx, "R2012",
new Dictionary <string, string> {
{ "dividend", self.Value.ToString() },
},
"ZeroDivisionError: Division by zero.");
}
return(GraceNumber.Create(self.Value / oth.Value));
}
/// <summary>Make a proxy for an object</summary>
/// <param name="o">Object to proxy</param>
public static GraceObject Create(Object o)
{
if (o is bool)
{
return(GraceBoolean.Create((dynamic)o));
}
if (o is int)
{
return(GraceNumber.Create((dynamic)o));
}
var s = o as string;
if (s != null)
{
return(GraceString.Create(s));
}
return(new GraceObjectProxy(o));
}
private static GraceObject mAt(EvaluationContext ctx,
MethodRequest req,
UTF32CodepointsView self)
{
MethodHelper.CheckArity(ctx, req, 1);
var arg = req[0].Arguments[0];
var index = arg.FindNativeParent <GraceNumber>();
var idx = index.GetInt() - 1;
if (idx < 0 || idx >= self.utf32.Count)
{
ErrorReporting.RaiseError(ctx, "R2013",
new Dictionary <string, string> {
{ "index", "" + (idx + 1) },
{ "valid", self.utf32.Count > 0 ?
"1 .. " + self.utf32.Count
: "none (empty)" }
}, "IndexError: Index out of range");
}
return(GraceNumber.Create(self.utf32[idx]));
}
private static GraceObject mNumeric(EvaluationContext ctx,
MethodRequest req,
CodepointObject self)
{
// By convention, return -1 for non-numeric codepoints.
if (self.parts[7] == "")
{
return(GraceNumber.Create(-1));
}
int val;
if (int.TryParse(self.parts[7], out val))
{
return(GraceNumber.Create(val));
}
// At this point, it must be a fraction n/m.
var bits = self.parts[7].Split('/');
var rat = Rational.Create(int.Parse(bits[0]), int.Parse(bits[1]));
return(GraceNumber.Create(rat));
}
private GraceObject mDo(EvaluationContext ctx, GraceObject block)
{
var apply = MethodRequest.Single("apply", null);
Rational v = _low;
if (_step < 0)
{
while (v >= _high)
{
apply[0].Arguments[0] = GraceNumber.Create(v);
block.Request(ctx, apply);
v += _step;
}
return(GraceObject.Done);
}
while (v <= _high)
{
apply[0].Arguments[0] = GraceNumber.Create(v);
block.Request(ctx, apply);
v += _step;
}
return(GraceObject.Done);
}
/// <summary>Native method for Grace unary negation</summary>
private static GraceObject mNegate(GraceNumber self)
{
return(GraceNumber.Create(-self.Value));
}
private static GraceObject mSize(GraceString self)
{
return(GraceNumber.Create(self.graphemeIndices.Length));
}
private static GraceObject mCombining(EvaluationContext ctx,
MethodRequest req,
CodepointObject self)
{
return(GraceNumber.Create(int.Parse(self.parts[2])));
}
private static GraceObject mCodepoint(EvaluationContext ctx,
MethodRequest req,
CodepointObject self)
{
return(GraceNumber.Create(self.codepoint));
}
private static GraceObject mSize(EvaluationContext ctx,
MethodRequest req,
StringCodepoints self)
{
return(GraceNumber.Create(self.utf32.Count));
}
private GraceObject mHash()
{
return(GraceNumber.Create(Boolean.GetHashCode()));
}
private static GraceObject mHash(GraceString self)
{
return(GraceNumber.Create(self.nfc.GetHashCode()));
}
private static GraceObject mHash(GraceNumber self)
{
return(GraceNumber.Create(self.Value.GetHashCode()));
}
private static GraceObject mSize(EvaluationContext ctx,
MethodRequest req,
ByteString self)
{
return(GraceNumber.Create(self.data.Length));
}