public Scope(int id, int argIndex, int localIndex, Scope previous, Action popAction = null)
{
_identifiers = new Dictionary<string, IdentifierOperand>();
_argIndex = argIndex;
_localIndex = localIndex;
_nextId = 0;
Id = id;
Previous = previous;
PopAction = popAction;
}
public ExpressionCompiler(bool generateDebugInfo = true)
{
_contexts = new List<FunctionContext>();
_currentScope = null;
_labelIndex = 0;
FrameIndex = -1;
GeneratingDebugInfo = generateDebugInfo;
NumberPool = new ConstantPool<double>();
StringPool = new ConstantPool<string>();
}
public FunctionContext(ExpressionCompiler compiler, int argIndex, int localIndex, Scope prevScope, string parentName, string name)
{
_instructions = new List<Instruction>();
_loopLabels = new IndexedStack<Tuple<LabelOperand, LabelOperand>>();
Compiler = compiler;
ArgIndex = argIndex;
LocalIndex = localIndex;
Scope = prevScope;
ParentName = parentName;
Name = name;
FullName = string.Format("{0}{1}{2}", parentName, string.IsNullOrEmpty(parentName) ? "" : ".", Name ?? "");
AssignedName = name != null ? prevScope.Get(name) : null;
Label = Compiler.MakeLabel("function");
IdentifierCount = 0;
}
public virtual void PushScope()
{
Compiler.ScopeDepth++;
var scopeId = Compiler.ScopeId++;
// don't do extra work if we dont need it
if (Compiler.Options.DebugInfo <= MondDebugInfoLevel.StackTrace)
{
Scope = new Scope(scopeId, ArgIndex, LocalIndex, Scope);
return;
}
var startLabel = MakeLabel("scopeStart");
var endLabel = MakeLabel("scopeEnd");
var newScope = new Scope(scopeId, ArgIndex, LocalIndex, Scope, () => Bind(endLabel));
Emit(new Instruction(InstructionType.Scope, new IInstructionOperand[]
{
new ImmediateOperand(scopeId),
new ImmediateOperand(Compiler.ScopeDepth),
new ImmediateOperand(Scope != null ? Scope.Id : -1),
startLabel,
endLabel,
new DeferredOperand<ListOperand<DebugIdentifierOperand>>(() =>
{
var operands = newScope.Identifiers
.Select(i => new DebugIdentifierOperand(String(i.Name), i.IsReadOnly, i.FrameIndex, i.Id))
.ToList();
return new ListOperand<DebugIdentifierOperand>(operands);
})
}));
Bind(startLabel);
Scope = newScope;
}
public virtual void PopScope()
{
var popAction = Scope.PopAction;
if (popAction != null)
popAction();
Scope = Scope.Previous;
Compiler.ScopeDepth--;
}
public void PushScope()
{
_currentScope = new Scope(FrameIndex, _currentScope);
}
public void PopScope()
{
_currentScope = _currentScope.Previous;
}