// <logo-routine-call-command> ::= <identifier>
private BaseLogoCommand ParseLogoRoutineCall()
{
Match(Token.IDENTIFIER);
SymbolTableEntry routineEntry = symbolTable.Lookup(scanner.ScanBuffer);
SymbolTableRoutineAttribute routineAttribute = null;
if (!routineEntry.TryLookupRoutineAttribute(ref routineAttribute))
{
SyntaxError(String.Format("Unknown routine name {0}", scanner.ScanBuffer), LogoErrorCode.RoutineCallError);
}
return(new LogoRoutineCallCommand(scanner.ScanBuffer, routineAttribute.Commands));
}
// <logo-routine-declaration> ::= TO <identifier> <logo-sentences> END <EOF>
private void ParseLogoRoutineDeclaration()
{
Match(Token.TO);
Match(Token.IDENTIFIER);
SymbolTableEntry entry = symbolTable.Enter(scanner.ScanBuffer);
var routineCommands = new Collection <BaseLogoCommand>();
ParseLogoSentences(routineCommands);
var routineAttribute = new SymbolTableRoutineAttribute(routineCommands);
entry.AddAttribute(routineAttribute);
Match(Token.END);
DomainEvents.Raise(new LogoRoutineEvent(symbolTable.LookupRoutines()));
}
public bool TryLookupRoutineAttribute(ref SymbolTableRoutineAttribute routineAttribute)
{
bool result = false;
foreach (SymbolTableAttribute attribute in attributes)
{
if (attribute.Type == SymbolType.ROUTINE)
{
routineAttribute = attribute as SymbolTableRoutineAttribute;
result = true;
}
}
return(result);
}
