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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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/* nodiscard attribute tests  */
/* { dg-do compile { target c++2a } } */
/* { dg-options "-O -ftrack-macro-expansion=0" } */

[[nodiscard, nodiscard]] int check1 (void); /* { dg-error "nodiscard\[^\n\r]*can appear at most once" } */

void
test (void)
{
  check1 ();			// { dg-warning "nodiscard" }
  (void) check1 ();
}