public CrawlArrayType(int rank, CrawlType elementType)
: base(elementType.Identifier + "[" + new string(',', rank - 1) + "]", elementType.Namespace)
{
Rank = rank;
ElementType = elementType;
Ancestor = CrawlSimpleType.Array;
}
/// <summary>
/// Checks if assigning this to target is legal(according to Cräwl specification).
/// </summary>
public override bool IsAssignableTo(CrawlType target)
{
throw new NotImplementedException();
//Are they equal?
if (Equals(target))
{
return(true);
}
//Is this a descendant of target?
//CrawlConstructedType ancestor = Ancestor;
//while (ancestor.Identifier != f$OBJECT")
//{
// if(ancestor.Equals(target))
// return true;
// ancestor = ancestor.Ancestor;
//}
////Is this implicitly castable to target?
//if(ImplicitlyCastableTo(target))
// return true;
//return false;
}
public override bool ImplicitlyCastableTo(CrawlType target)
{
if (target is CrawlTypeTal)
{
return(true);
}
return(base.ImplicitlyCastableTo(target));
}
public override bool CastableTo(CrawlType target)
{
if (target is CrawlTypeTekst)
{
return(true);
}
return(base.CastableTo(target));
}
public override bool CastableTo(CrawlType target)
{
//CrawlArrayType t = target as CrawlArrayType;
//if (t != null &&
// t.Dimensions == Dimensions &&
// t.ArrayElementType.CastableTo(ArrayElementType) )
// return true;
//else
return(false);
}
public override bool IsAssignableTo(CrawlType target)
{
//Arrays cannot be cast up or down
//Array of Animals, Containing a Tiger, assigned to an array of Dogs?
//Array of Dogs, assigned to array of Animal, then a Tiger is inserted?
CrawlArrayType t = target as CrawlArrayType;
return(t != null &&
t.Rank == Rank &&
t.ElementType.Equals(ElementType));
}
public static CrawlType ParseDecleration(IScope declerationScope, string text)
{
if (text.Last() == ']')
{
int arrayMarkStart = text.LastIndexOf('[');
string remainingType = text.Substring(0, arrayMarkStart);
string arrayPart = text.Substring(arrayMarkStart);
int rank = arrayPart.Count(x => x == ',') + 1;
return new CrawlArrayType(rank, ParseDecleration(declerationScope, remainingType));
}
else if (text.Last() == ')')
{
int methodMarkStart = text.LastIndexOf('(');
string remainingType = text.Substring(0, methodMarkStart);
string parametersSingleString = text.Substring(methodMarkStart + 1, text.Length - methodMarkStart - 2);
//Uhh, probably correct. Well not, but i don't think we can get anything that breaks it. "foo(,)" would lead to no parameters...
string[] parameters = parametersSingleString.Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries);
CrawlType returnType;
if (remainingType.Trim() == "intet")
{
returnType = CrawlSimpleType.Intet;
}
else
{
returnType = ParseDecleration(declerationScope, remainingType);
}
CrawlType[] parameterTypes = new CrawlType[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
parameterTypes[i] = ParseDecleration(declerationScope, parameters[i]);
}
return new CrawlMethodType(returnType, parameterTypes);
}
else
{
var results = declerationScope.FindSymbol(text.Trim());
if (results == null || results.Length == 0)
{
throw new TypeNotFoundException("Unknown type " + text); //TODO: ERROR MSG
}
else if (results.Length == 1)
{
return results[0].Type;
}
else
throw new Exception("Ambigious types " + text); //TODO: ERROR MSG
}
}
public override bool ImplicitlyCastableTo(CrawlType target)
{
//Casting an entire array in any way dosen't make sense.
//We could try, but it just leads to _weird_ erros when trying
//to save something in a casted array.
//CrawlArrayType t = target as CrawlArrayType;
//if (t != null &&
// t.Dimensions == Dimensions &&
// t.ArrayElementType.ImplicitlyCastableTo(ArrayElementType) )
// return true;
//else
return(false);
}
/// <summary>
/// Checks if a cast from this to target is legal(according to the Cräwl specification).
/// </summary>
public override bool CastableTo(CrawlType target)
{
throw new NotImplementedException();
//TODO Check additional rules for simple types
////Are they equal?
//if (Equals(target))
// return true;
////Is this a descendant of target?
//CrawlConstructedType ancestor = Ancestor;
//while (ancestor.Identifier != "$OBJECT")
//{
// if(ancestor.Equals(target))
// return true;
// ancestor = ancestor.Ancestor;
//}
//return false;
}
/// <summary> /// Checks if an implicit cast from this to target is legal(according to the Cräwl specification). /// </summary> public abstract bool ImplicitlyCastableTo(CrawlType target);
/// <summary>
/// Checks if an implicit cast from this to target is legal(according to the Cräwl specification).
/// </summary>
public override bool ImplicitlyCastableTo(CrawlType target)
{
//TODO Check additional rules for simple types
return(false);
}
public override bool ImplicitlyCastableTo(CrawlType target)
{
return(!(target is CrawlSimpleType));
}
public override bool IsAssignableTo(CrawlType target)
{
return(false);
}
public override bool CastableTo(CrawlType target)
{
return(false);
}
public override bool IsAssignableTo(CrawlType target)
{
return(!(target is CrawlSimpleType));
}
public CrawlMethodType(CrawlType returnType, IEnumerable <CrawlType> parameters)
: base("", "")
{
ReturnType = returnType;
Parameters = parameters.ToList();
}
/// <summary> /// Checks if a cast from this to target is legal(according to the Cräwl specification). /// </summary> public abstract bool CastableTo(CrawlType target);
/// <summary> /// Checks if assigning this to target is legal(according to Cräwl specification). /// </summary> public abstract bool IsAssignableTo(CrawlType target);
public override bool CastableTo(CrawlType target)
{
return(Equals(target));
}
public override bool IsAssignableTo(CrawlType target)
{
return(Equals(target) || ImplicitlyCastableTo(target));
}
public override bool IsAssignableTo(CrawlType target)
{
return(Equals(target));
}