public static ActiveConstantExpression Create(ConstantExpression constantExpression, ActiveExpressionOptions?options)
{
var type = constantExpression.Type;
var value = constantExpression.Value;
if (typeof(Expression).IsAssignableFrom(type))
{
var key = new ExpressionInstancesKey((Expression)value, options);
lock (instanceManagementLock)
{
if (!expressionInstances.TryGetValue(key, out var activeConstantExpression))
{
activeConstantExpression = new ActiveConstantExpression(type, value, options, key, null);
expressionInstances.Add(key, activeConstantExpression);
}
++activeConstantExpression.disposalCount;
return(activeConstantExpression);
}
}
else
{
var key = new InstancesKey(type, value, options);
lock (instanceManagementLock)
{
if (!instances.TryGetValue(key, out var activeConstantExpression))
{
activeConstantExpression = new ActiveConstantExpression(type, value, options, null, key);
instances.Add(key, activeConstantExpression);
}
++activeConstantExpression.disposalCount;
return(activeConstantExpression);
}
}
}
public int GetHashCode(ExpressionInstancesKey obj) => HashCode.Combine(obj.Expression is null ? 0 : ExpressionEqualityComparer.Default.GetHashCode(obj.Expression), obj.Options);