} // set during AST construction
#region implemented abstract members of Node
/// <summary>
/// Resolve type defined by this typeExpression. Type Expression must be given in reversed order.
/// </summary>
/// <returns>The resolved type.</returns>
/// <param name="typeExpr">Enumerator of reversed type expresion enumeration.</param>
public static TypeNode RecursiveResolveArrayType <TSymbol>(IEnumerator <IParseTree <TSymbol> > typeExpr) where TSymbol : ISymbol <TSymbol>
{
bool isMutable = ASTBuilder.EatSymbol("mutable", typeExpr);
if (ASTBuilder.EatSymbol("]", typeExpr)) // if ] is present then create ArrayType
{
var resType = new ArrayTypeNode();
resType.IsConstant = !isMutable;
resType.IsFixedSize = false; // we initialize all arrays as dynamic size
if (ASTBuilder.EatSymbol("[", typeExpr)) // opening bracket, no length expression
{
resType.LengthExpression = null;
}
else // length expression present
{
resType.LengthExpression = ExpressionNode.GetExpressionNode(typeExpr.Current);
typeExpr.MoveNext();
Debug.Assert(ASTBuilder.EatSymbol("[", typeExpr)); // eat opening bracket
}
resType.ElementType = RecursiveResolveArrayType(typeExpr);
return(resType);
}
else
{
var resType = new NamedTypeNode();
resType.BuildNode(typeExpr.Current);
resType.IsConstant = !isMutable;
return(resType);
}
}
public static ConstNode GetConstNode <TSymbol>(IParseTree <TSymbol> parseTree) where TSymbol : ISymbol <TSymbol>
{
// one of: DecimalNumberLiteral | CharacterLiteral | StringLiteral | BooleanLiteral
TypeNode type;
switch (ASTBuilder.GetName(parseTree.Symbol))
{
case "DecimalNumberLiteral":
type = NamedTypeNode.IntType(true);
break;
case "CharacterLiteral":
type = NamedTypeNode.CharType(true);
break;
case "StringLiteral":
throw new NotImplementedException(); // TODO: strings implementation
case "BooleanLiteral":
type = NamedTypeNode.BoolType(true);
break;
default:
throw new System.ArgumentException();
}
return(new AtomNode(type));
}
public static NamedTypeNode ByteType(bool isConstant = false)
{
NamedTypeNode node = new NamedTypeNode();
node.Name = "byte";
node.IsConstant = isConstant;
return(node);
}
public static NamedTypeNode CharType(bool isConstant = false)
{
NamedTypeNode node = new NamedTypeNode();
node.Name = "char";
node.IsConstant = isConstant;
return(node);
}
public static ArrayTypeNode VoidType()
{
return(MakeType(NamedTypeNode.VoidType()));
}
public static ArrayTypeNode IntType()
{
return(MakeType(NamedTypeNode.IntType()));
}
public static ArrayTypeNode CharType()
{
return(MakeType(NamedTypeNode.CharType()));
}
public static ArrayTypeNode ByteType()
{
return(MakeType(NamedTypeNode.ByteType()));
}