private AST Pointer()
{
if (currentToken.Type == TokenType.TILDE)
{
Eat(TokenType.TILDE);
StringToken nodeToken = new StringToken(TokenType.ID, "Node", currentToken.Line, currentToken.Column, file);
return(new IdAST(nodeToken));
}
else if (currentToken.Type == TokenType.AT)
{
Eat(TokenType.AT);
StringToken inputToken = new StringToken(TokenType.ID, "InputMarker", currentToken.Line, currentToken.Column, file);
return(new IdAST(inputToken));
}
else if (currentToken.Type == TokenType.DOLL)
{
Eat(TokenType.DOLL);
StringToken outputToken = new StringToken(TokenType.ID, "OutputSink", currentToken.Line, currentToken.Column, file);
return(new IdAST(outputToken));
}
StringToken idToken = Eat(TokenType.ID) as StringToken;
AST pointerAST = new IdAST(idToken);
while (currentToken.Type == TokenType.DOT)
{
Eat(TokenType.DOT);
idToken = Eat(TokenType.ID) as StringToken;
pointerAST = new PointerAST(pointerAST, new IdAST(idToken));
}
return(pointerAST);
}
private object Visit(IdAST idAST)
{
Symbol symbol = currentScope.Lookup(idAST.Id);
if (symbol == null)
{
TypeSymbol typeSymbol = currentScope.Lookup("Node") as TypeSymbol;
Node node = typeSymbol.GetValue() as Node;
node.Name = idAST.Id;
ModelSymbol modelSymbol = new ModelSymbol(idAST.Id, typeSymbol, node);
currentScope.Insert(modelSymbol);
return(node);
// throw logger.Error(new SemanticException(idAST.FindToken(), $"Undefined variable {idAST.Id}"));
}
else
{
return(symbol.GetValue());
}
}
