public override List <string> ExecuteSemanticAction(Stack <SemanticRecord> semanticRecordTable, Stack <SymbolTable> symbolTable, IToken lastToken, MoonCodeResult moonCode)
{
SymbolTable currentTable = symbolTable.Peek();
// Get the last created variable
SemanticRecord variableRecord = semanticRecordTable.Pop();
Entry variableEntry = new VarParamEntry(currentTable, variableRecord.getVariable(), EntryKinds.variable);
// Only declare variables for functions (not class member variables)
//if(currentTable.getParent() is FunctionEntry)
{
int size = variableRecord.getVariable().GetSize();
string address = variableEntry.getAddress();
if (size <= 0)
{
moonCode.AddGlobal(string.Format("% {0} res 0", address));
}
else if (size == 4)
{
moonCode.AddGlobal(string.Format("{0} dw 0", address));
}
else
{
moonCode.AddGlobal(string.Format("{0} res {1}{2}align", address, size, Environment.NewLine));
}
}
return(new List <string>());
}
public override List <string> ExecuteSemanticAction(Stack <SemanticRecord> semanticRecordTable, Stack <SymbolTable> symbolTable, IToken lastToken)
{
SymbolTable currentTable = symbolTable.Peek();
// Get the last created variable
SemanticRecord variableRecord = semanticRecordTable.Pop();
Entry variableEntry = new VarParamEntry(currentTable, variableRecord.getVariable(), EntryKinds.variable);
return(new List <string>());
}
public override List <string> ExecuteSemanticAction(Stack <SemanticRecord> semanticRecordTable, Stack <SymbolTable> symbolTable, IToken lastToken, MoonCodeResult moonCode)
{
SymbolTable currentTable = symbolTable.Peek();
LinkedList <Variable> foundParameters = new LinkedList <Variable>();
bool entryCreated = false;
string funcName = string.Empty;
List <string> errors = new List <string>();
// Iterate over the semantic stack and consume records relevant to this function
while (!entryCreated)
{
SemanticRecord topRecord = semanticRecordTable.Pop();
// Handle the record depending on its type
switch (topRecord.recordType)
{
case RecordTypes.Variable:
// Encountered paramenters
foundParameters.AddFirst(topRecord.getVariable());
break;
case RecordTypes.IdName:
// The name of this function
funcName = topRecord.getValue();
break;
case RecordTypes.TypeName:
// If we encounter a type we are done collecting and can create the entry
FunctionEntry funcEntry = new FunctionEntry(currentTable, funcName, topRecord.getType());
funcEntry.AddParameters(foundParameters);
// Push the function's scope to the stack of symbol tables
symbolTable.Push(funcEntry.getChild());
entryCreated = true;
break;
default:
// This should only fail if there is an error in the grammar.
errors.Add("Grammar error, parsed rule that placed unexpected character on semantic stack");
break;
}
}
return(errors);
}