private ExpressionContainer GetOrAddExpressionContainer(IfDefSet ifDefs)
{
ExpressionContainer container;
if (_knownReferences.TryGetValue(ifDefs, out container))
{
return(container);
}
if (ifDefs.Count == 1)
{
return(AddIfDefExpressionContainer(ifDefs.First()));
}
container = new ExpressionContainer();
var listContainers = new List <ExpressionContainer>(ifDefs.Count);
foreach (var ifDef in ifDefs)
{
listContainers.Add(GetOrAddExpressionContainer(new IfDefSet(ifDef)));
}
var operands = new Operands(listContainers.Select(_ => _.FlatExpression.Operands).SelectMany(_ => _)
.Distinct().OrderBy(_ => _).ToArray());
var flatExpr = new FlatExpression(operands);
foreach (var c in listContainers)
{
flatExpr = flatExpr.Or(c.FlatExpression);
}
container.FlatExpression = flatExpr;
_knownReferences.Add(ifDefs, container);
return(container);
}
private string BuildExpression(NodeHelper node)
{
var def = node.Extra.Define;
if (def.IsAlways || def.IfDefs == null || def.IfDefs.Count == 0)
{
return(null);
}
node.Extra.Define.IfDefs.Sort();
var key = new IfDefSet(node.Extra.Define.IfDefs);
var container = GetOrAddExpressionContainer(key);
container.BuildExpression();
return(container.Expression);
}
