public static AstExpr ExprFor(this IAstFactory factory, ISourcePosition position, QualifiedId qualifiedId,
ISymbolView<Symbol> scope)
{
var currentScope = scope;
for (var i = 0; i < qualifiedId.Count; i++)
{
// Lookup name part
Symbol sym;
if (!currentScope.TryGet(qualifiedId[i], out sym))
{
return new AstUnresolved(position, qualifiedId[i]);
}
var expr = factory.ExprFor(position, sym);
// last part of qualified ID does not need to be a namespace, so we're done here
if (i == qualifiedId.Count - 1)
return expr;
var nsUsage = expr as AstNamespaceUsage;
if (nsUsage == null)
{
factory.ReportMessage(Message.Error(
string.Format(Resources.Parser_NamespaceExpected, qualifiedId[i], sym),
position, MessageClasses.NamespaceExcepted));
return factory.IndirectCall(position, factory.Null(position));
}
currentScope = nsUsage.Namespace;
}
throw new InvalidOperationException("Failed to resolve qualified Id (program control should never reach this point)");
}
public SymbolMExprParser([NotNull] ISymbolView<Symbol> symbols,[NotNull] IMessageSink messageSink, [NotNull]ISymbolView<Symbol> topLevelSymbols = null)
{
if (symbols == null)
throw new ArgumentNullException("symbols");
if (messageSink == null)
throw new ArgumentNullException("messageSink");
_symbols = symbols;
_messageSink = messageSink;
_topLevelSymbols = topLevelSymbols ?? symbols;
}
public void PlaceSymbol(int positionY, Duration symbolDuration, ISymbolView view)
{
var offsetMultiplier = 0f;
if (_lastSymbolDuration != Duration.Undefined)
{
offsetMultiplier = Config.GetDistanceOffsetMultiplier(_lastSymbolDuration)
.Check($"[StaffView] There is no distance offset for duration '{_lastSymbolDuration}' in StaffConfig!")
.ValueOr(0);
}
var posX = _lastSymbolPosition + Config.DistanceBetweenSymbolsHorizontal * offsetMultiplier;
var posY = positionY * Config.DistanceBetweenSymbolsVertical;
var rt = view.RectTransform;
rt.SetParent(_contents, false);
rt.anchoredPosition = new Vector2(posX, posY);
_symbolsOnTheStaff.Add(view);
_lastSymbolPosition = posX;
_lastSymbolDuration = symbolDuration;
}
public void Push(ISymbolView view)
{
view.RectTransform.SetParent(_heap);
_freeSymbols.Push(view);
}
