public static VariableSymbolTableEntry AccessMember(List <string> identifierList)
{
string symbolIdentifier = identifierList[identifierList.Count - 1];
SymbolTable symbolTable = TopSymbolTables[identifierList[0]];
SymbolTableEntry symbolTableEntry = symbolTable.RetrieveSymbolInChildScope(symbolIdentifier);
if (symbolTableEntry is VariableSymbolTableEntry variableSymbolTableEntry)
{
return(variableSymbolTableEntry);
}
return(null);
}
public void AddOrUpdateSymbol(string identifier, SymbolTableEntry data)
{
if (symbols.ContainsKey(identifier))
{
symbols[identifier] = data;
return;
}
SymbolTable symbolTable = RetrieveSymbolTable(identifier);
if (symbolTable != null)
{
symbolTable.AddOrUpdateSymbol(identifier, data);
}
else
{
symbols.Add(identifier, data);
}
}
public SymbolTableEntry RetrieveSymbolInParentScope(string identifier)
{
if (symbols.TryGetValue(identifier, out SymbolTableEntry symbol))
{
return(symbol);
}
if (Parent != null)
{
SymbolTableEntry parentSymbol = Parent.RetrieveSymbolInParentScope(identifier);
if (parentSymbol != null)
{
return(parentSymbol);
}
}
throw new ArgumentException($"Invalid identifier: {identifier}.");
}
public SymbolTableEntry RetrieveSymbolInChildScope(string identifier)
{
if (symbols.TryGetValue(identifier, out SymbolTableEntry symbol))
{
return(symbol);
}
if (Children.Count > 0)
{
foreach (SymbolTable childSymbolTable in Children)
{
SymbolTableEntry childSymbol = childSymbolTable.RetrieveSymbolInChildScope(identifier);
if (childSymbol != null)
{
return(childSymbol);
}
}
}
throw new ArgumentException($"Invalid identifier: {identifier}.");
}
public void Visit(IdentifierValueNode identifierValueNode)
{
SymbolTableEntry entry;
try
{
entry = symbolTable.RetrieveSymbolInParentScope(identifierValueNode.Identifier);
}
catch (Exception e)
{
DazelLogger.EmitError(e.Message, identifierValueNode.Token);
return;
}
if (entry is VariableSymbolTableEntry variableSymbolTableEntry)
{
ExpressionNode expression = variableSymbolTableEntry.ValueNode;
SetNumericalExpression(identifierValueNode, expression, entry.Type);
}
SymbolTableEntry symbolTableEntry = symbolTable.RetrieveSymbolInParentScope(identifierValueNode.Identifier);
typeHandler.SetType(symbolTableEntry.Type, identifierValueNode.Token);
}
