/// <summary>
/// Removes substitution currently used by the rewriter for a placeholder node.
/// Asserts if there isn't already a substitution.
/// </summary>
private void RemovePlaceholderReplacement(BoundValuePlaceholderBase placeholder)
{
Debug.Assert((object)placeholder != null);
bool removed = _placeholderReplacementMapDoNotUseDirectly.Remove(placeholder);
Debug.Assert(removed);
}
/// <summary>
/// Returns substitution currently used by the rewriter for a placeholder node.
/// Each occurrence of the placeholder node is replaced with the node returned.
/// Throws if there is no substitution.
/// </summary>
private BoundExpression PlaceholderReplacement(BoundValuePlaceholderBase placeholder)
{
var value = _placeholderReplacementMapDoNotUseDirectly[placeholder];
AssertPlaceholderReplacement(placeholder, value);
return(value);
}
/// <summary>
/// Sets substitution used by the rewriter for a placeholder node.
/// Each occurrence of the placeholder node is replaced with the node returned.
/// Throws if there is already a substitution.
/// </summary>
private void AddPlaceholderReplacement(BoundValuePlaceholderBase placeholder, BoundExpression value)
{
AssertPlaceholderReplacement(placeholder, value);
if ((object)_placeholderReplacementMapDoNotUseDirectly == null)
{
_placeholderReplacementMapDoNotUseDirectly = new Dictionary <BoundValuePlaceholderBase, BoundExpression>();
}
_placeholderReplacementMapDoNotUseDirectly.Add(placeholder, value);
}
private static void AssertPlaceholderReplacement(BoundValuePlaceholderBase placeholder, BoundExpression value)
{
Debug.Assert(value.Type.Equals(placeholder.Type, TypeCompareKind.AllIgnoreOptions));
}
