private void FindSymbolsRecursively(ISyntaxNode node, ref int localVariableIndex)
{
if (node is BlockStatementNode)
{
var block = (BlockStatementNode)node;
_scopeStack.PushAnonymousScope();
var declaredIdentifiers = block.Declarations.SelectMany(d => d.Variables).ToList();
EnterIdentifiers(declaredIdentifiers, SymbolTableEntryType.Variable, ref localVariableIndex);
foreach (var statement in block.Statements)
{
FindSymbolsRecursively(statement, ref localVariableIndex);
}
_scopeStack.PopScope();
}
else if (node is VariableReferenceNode)
{
var reference = (VariableReferenceNode)node;
var symbolTableEntry = FindDeclaration(reference.Variable.Name);
if (symbolTableEntry == null)
{
throw new Exception(string.Format("Variable {0} is not declared", reference.Variable.Name));
}
reference.SymbolTableEntry = symbolTableEntry;
}
else if (node is AssignmentStatementNode)
{
var assign = (AssignmentStatementNode)node;
var symbolTableEntry = FindDeclaration(assign.Variable.Name);
if (symbolTableEntry == null)
{
throw new Exception(string.Format("Variable {0} is not declared", assign.Variable.Name));
}
assign.SymbolTableEntry = symbolTableEntry;
FindSymbolsRecursively(assign.Expression, ref localVariableIndex);
}
else if (node is FunctionCallNode)
{
var call = (FunctionCallNode)node;
var symbolTableEntry = FindDeclaration(call.Name.Name);
if (symbolTableEntry == null)
{
throw new Exception(string.Format("Function {0} is not declared", call.Name.Name));
}
call.SymbolTableEntry = symbolTableEntry;
foreach (var argument in call.Arguments)
{
FindSymbolsRecursively(argument, ref localVariableIndex);
}
}
else
{
foreach (var child in node.GetChildren())
{
FindSymbolsRecursively(child, ref localVariableIndex);
}
}
}
private static void Print(ISyntaxNode node, int level)
{
Console.Write(new string(' ', 2 * level));
Console.WriteLine(node);
foreach (var child in node.GetChildren())
{
Print(child, level + 1);
}
}
private static void Print(ISyntaxNode node, int level)
{
Console.Write(new string(' ', 2 * level));
Console.WriteLine(node);
foreach (var child in node.GetChildren())
{
Print(child, level + 1);
}
}
private void FindSymbolsRecursively(ISyntaxNode node, ref int localVariableIndex)
{
if (node is BlockStatementNode)
{
var block = (BlockStatementNode) node;
_scopeStack.PushAnonymousScope();
var declaredIdentifiers = block.Declarations.SelectMany(d => d.Variables).ToList();
EnterIdentifiers(declaredIdentifiers, SymbolTableEntryType.Variable, ref localVariableIndex);
foreach (var statement in block.Statements)
{
FindSymbolsRecursively(statement, ref localVariableIndex);
}
_scopeStack.PopScope();
}
else if (node is VariableReferenceNode)
{
var reference = (VariableReferenceNode) node;
var symbolTableEntry = FindDeclaration(reference.Variable.Name);
if (symbolTableEntry == null)
throw new Exception(string.Format("Variable {0} is not declared", reference.Variable.Name));
reference.SymbolTableEntry = symbolTableEntry;
}
else if (node is AssignmentStatementNode)
{
var assign = (AssignmentStatementNode) node;
var symbolTableEntry = FindDeclaration(assign.Variable.Name);
if (symbolTableEntry == null)
throw new Exception(string.Format("Variable {0} is not declared", assign.Variable.Name));
assign.SymbolTableEntry = symbolTableEntry;
FindSymbolsRecursively(assign.Expression, ref localVariableIndex);
}
else if (node is FunctionCallNode)
{
var call = (FunctionCallNode) node;
var symbolTableEntry = FindDeclaration(call.Name.Name);
if (symbolTableEntry == null)
throw new Exception(string.Format("Function {0} is not declared", call.Name.Name));
call.SymbolTableEntry = symbolTableEntry;
foreach (var argument in call.Arguments)
{
FindSymbolsRecursively(argument, ref localVariableIndex);
}
}
else
{
foreach (var child in node.GetChildren())
{
FindSymbolsRecursively(child, ref localVariableIndex);
}
}
}
