public Expression Optimize(Expression e, string?discriminator)
{
if (discriminator is not null)
{
if (e.Type.IsGenericType)
{
Type? sourceType = e.Type.GetGenericArguments()[0];
MethodInfo wrapInWhere = WrapInWhereGenericMethod.MakeGenericMethod(sourceType);
e = (Expression)wrapInWhere.Invoke(null, new object[] { e, discriminator });
}
else
{
Type sourceType = e.Type;
MethodInfo wrapInWhere = WrapInWhereGenericMethod.MakeGenericMethod(sourceType);
var rootMethodCallExpression = e as MethodCallExpression;
Expression source = rootMethodCallExpression !.Arguments[0];
var discriminatorWrap = (MethodCallExpression)wrapInWhere.Invoke(null, new object[] { source, discriminator });
if (rootMethodCallExpression.Arguments.Count == 1)
{
e = Expression.Call(rootMethodCallExpression.Method, discriminatorWrap);
}
else
{
e = Expression.Call(rootMethodCallExpression.Method, discriminatorWrap, rootMethodCallExpression.Arguments[1]);
}
}
}
e = LocalExpressions.PartialEval(e);
return(Visit(e));
}
public Expression Optimize(Expression e, string?discriminator)
{
if (discriminator is not null)
{
Type? sourceType = e.Type.GetGenericArguments()[0];
MethodInfo?wrapInWhere = WrapInWhereGenericMethod.MakeGenericMethod(new[] { sourceType });
e = (Expression)wrapInWhere.Invoke(null, new object[] { e, discriminator });
}
e = LocalExpressions.PartialEval(e);
return(Visit(e));
}
public Expression Optimize(Expression e)
{
e = LocalExpressions.PartialEval(e);
return(Visit(e));
}
