[ESP07][Arduino][ESPAsyncWebServer] - I can't move functions to their own classes

When I have all the variables and functions relating to the server in the main.c file it is fine. The program compiles and runs.
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When the variables t , h and index_html[] and functions processor and initWebServer I will move to my own class, then the program stops compiling.
The following errors appear in the method WebServer::init :
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The code looks as follows:
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What am I doing wrong?

The function send () that you use in WebServer::init () has the following declaration: As the fourth parameter it expects a function type AwsTemplateProcessor , which is defined as: i.e., e.g. function String MyFunction(const String& param) . However, in your code you specify a function String WebServer::processor(const String& var) - these are two different types in C++.
The function String F(const String&) is not the same as String Object::F(const String&) . You can work around this problem by declaring the function processor () in class WebServer as static: that is, one that is not called on behalf of a specific object.

Added after 42 [minutes]: .

The second and third errors are of the same type. You should use send () instead of send_P (): .
The function send_P () could only be used in this context if the third argument were of type PGM_P . Declarations of both functions: .
https://github.com/me-no-dev/ESPAsyncWebServer/blob/master/src/ESPAsyncWebServer.h

khoam wrote:

The second and third errors are of the same type. You should use send() instead of send_P():

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Then why does it work send_P() in the non-object version?

The answer is in the error message:
Function send_P () is called in the context of this (given) object, so there is a problem with passing the default value of the 4th argument, which should be of function type AwsTemplateProcessor (see my previous post).
It is better to use a version of the function send () as I wrote above.

For the first error I converted the function processor to static according to your suggestion. Now I have 2 errors that it does not know t and h .
For the other two errors I changed the function calls send_P() to send() , but I still get the error 'this' was not captured for this lambda function .

sq9etc wrote:

For the other two errors I changed the send_P() function calls to send(), but I still get the error 'this' was not captured for this lambda function.

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Please show just this code snippet after 'refactoring' to send () and error logs.

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The variables h and t belong to object of class WebServer , so they must be "captured" by the lambda function in server.on (). Try this code after modification: It is [&] .

Thanks, that helped.
I still don't know what to do to make the static function processor see the fields t and h .
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sq9etc wrote:

I still haven't figured out what to do to make a static processor function see the t and h fields.

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Unfortunately, a static function of a class can only see static variables of that class, unless you additionally provide (as an argument) a reference to an object of that class. In this case, this is quite difficult to do. Try making processor () a normal function again (remove the specifier static ) along with modifying the code snippet: Probably an error will pop up, but something further can be done about it.

I did as recommended. Now there is this error:
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i.e. again can't match method String WebServer::processor(const String& var) as parameter of function send_P .

You need to add a local helper function procfun (): Function processor () is to remain non-static.

Thanks, you are great. Now it compiles and even works:) .