Issue with nodiscard

[primal sequoia]

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[hardy maple]

;compile clang_trunk -Werror

#include <utility>
template <typename T> [[nodiscard("")]] auto move_nodiscard(T &&movee) {
  return std::move(movee);
}



int main()
{
    #define DD(expr) ({move_nodiscard(expr))}                                                       

  DD(1)               // doesnt work
  DD("hi")            // doesnt work
  return 0;}```

[hot cove]

Compiler Output

<source>:12:3: error: expected ';' after expression
   12 |   DD(1)               // doesnt work
      |   ^
<source>:10:44: note: expanded from macro 'DD'
   10 |     #define DD(expr) ({move_nodiscard(expr))}                                                       
      |                                            ^
<source>:12:3: error: ignoring return value of function declared with 'nodiscard' attribute [-Werror,-Wunused-result]
   12 |   DD(1)               // doesnt work
      |   ^~~~~
<source>:10:24: note: expanded from macro 'DD'
   10 |     #define DD(expr) ({move_nodiscard(expr))}                                                       
      |                        ^~~~~~~~~~~~~~~~~~~~
<source>:12:3: error: expected expression
<source>:10:44: note: expanded from macro 'DD'
   10 |     #define DD(expr) ({move_nodiscard(expr))}                                                       
      |                                            ^
<source>:14:3: error: expected unqualifie

tweakeroo. | c++ | x86-64 clang (trunk) | godbolt.org

[hardy maple]

it does work

wym

clang trunk works

gcc msvc and clang do completely different things xD

https://stackoverflow.com/questions/8143016/is-there-a-statement-expression-equivalent-in-visual-studio

i mean its a GCC extension

apparently

[primal sequoia]

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