https://www.infoworld.com/article/3182416/c-7-in-depth-exploring-local-functions.html
I really need to know exactly following code how Local Functions supposed to be.
Am 0% IL Code/MSIL experience.
public static void Display(string str)
{
int ctr = 5;
DisplayText();
void DisplayText ()
{
for(int i = 0; i < ctr; i++)
Console.WriteLine(str);
}
}
Question I need to know here from previous code:
Display() does Local Function DisplayText() always generated when main one called? Or it created as a fake local function in C# but in MSIL it generated as Global function?Edit:- I think Local Properties (which not exists yet or maybe ...). it is useful also sometimes. which you can have some calculation in same Method as a local property. as previous example but DisplayText are property. Wish they add it also.
CIL and the runtime have no concept of a local function, instead the C# compiler translates it into a normal method with private visibility and potentially a class/struct used to share state with the declaring method. You can see this for yourself by compiling the code and then decompiling the assembly, or by using a site such as SharpLab.io.
Lambda expressions and anonymous methods are very similar, except that they need to provide a delegate which can limit the optimization opportunities.
The compiler puts a lot of effort into optimizing the generated code, I would not expect local methods to affect performance much beyond what you would get for any other method. I would suggest you focus more on how it affects maintainability, at least until you can identify an actual performance problem by profiling.