public static ExpressionNode ResolveAtomicExpression <TSymbol>(IParseTree <TSymbol> parseTree) where TSymbol : ISymbol <TSymbol>
{
// AtomicExpression -> BlockExpression | ObjectDefinitionExpression | ArrayLiteralExpression | ObjectUseExpression |
// IfExpression | WhileExpression | LoopControlExpression
var node = ASTBuilder.FirstChild(parseTree); // AtomicExpression -> one of available symbols
ExpressionNode atomic;
switch (ASTBuilder.GetName(node.Symbol))
{
case "BlockExpression":
atomic = new BlockExpressionNode();
break;
case "ArrayLiteralExpression":
throw new System.NotImplementedException(); // TODO: arrays implementation
case "ObjectUseExpression":
// ObjectUseExpression -> ObjectName | Literals
node = ASTBuilder.FirstChild(node);
if (node.Symbol.IsTerminal) // ObjectName
{
atomic = new VariableUseNode();
}
else // Literals
{
node = ASTBuilder.FirstChild(node); // Literals -> one of available literals
atomic = ConstNode.GetConstNode(node);
}
break;
case "LoopControlExpression":
atomic = new LoopControlNode();
break;
default:
throw new System.ArgumentException();
}
atomic.BuildNode(node);
return(atomic);
}