Access maximum template depth at compile?

问题:

In a certain compilation I need to play around with the option -ftemplate-depth=N that specifies the maximum template recursion.

Is it possible to access the value of the maximum template depth from the program?

I am interested in gcc or clang.

$ c++ -ftemplate-depth=128 main.cpp

#include<iostream> int main(){   std::cout << MAX_TEMPLATE_RECURSION << std::endl; // hypothetical name } 

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