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(PointerAST pointerAST)
{
ScopeSymbolTable scope = Visit(pointerAST.ScopeName) as ScopeSymbolTable;
if (scope != null)
{
ScopeSymbolTable tempScope = currentScope;
currentScope = scope;
object member = Visit(pointerAST.Member);
currentScope = tempScope;
return(member);
}
else
{
throw logger.Error(new SemanticException(pointerAST.ScopeName.FindToken(), "Scope expected"));
}
}
