How can I intentionally discard a [[nodiscard]] return value?

Question

Say I have

[[nodiscard]] int foo () {     return 0; }  int main () {     foo (); } 

then

error: ignoring return value of ‘int foo()’, declared with attribute nodiscard [-Werror=unused-result] 

but if

int x = foo (); 

then

error: unused variable ‘x’ [-Werror=unused-variable] 

Is there a clean way of telling the compiler "I want to discard this [[nodiscard]] value"?

Answer 1

Cast it to void:

[[nodiscard]] int foo () {     return 0; }  int main () {     static_cast<void>(foo()); } 

This basically tells the compiler "Yes I know I'm discarding this, yes I'm sure of it."