I'm trying to get code similar to this to compile: template<bool Flag> struct foo {static const bool bar = Flag;}; int main() { int a; int baz = foo<__builtin_constant_p(a)>::bar; } minimal.cpp: In function ‘int main()’: minimal.cpp:4:42: error: the value of ‘a’ is not usable in a constant…

Templates and __builtin-constant_p

Topic		Replies	Views
Initializing FastLED with non-constant pin values (C++ templates?) Programming	4	3554	May 5, 2021
Const vs #define Programming	40	36599	May 5, 2021
C++ question: constant objects? Syntax & Programs	7	1616	May 6, 2021
const int a=a; Suggestions for the Arduino Project	3	990	May 6, 2021
digitalWriteFast and checking __builtin_constant_p(V) Programming	2	1667	May 5, 2021