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| author | Jason Merrill <jason@redhat.com> | 2020-12-08 21:47:11 -0500 |
|---|---|---|
| committer | Jason Merrill <jason@redhat.com> | 2020-12-09 00:36:07 -0500 |
| commit | c3a63fb3854392af65a191154e3586e7f5a1066e (patch) | |
| tree | bd153bc97384ebe5bb874f1424a0049f86dc49b1 /gcc/cp | |
| parent | 4eb28483004f8291c1f17df3b242716a5151c180 (diff) | |
| download | gcc-c3a63fb3854392af65a191154e3586e7f5a1066e.zip gcc-c3a63fb3854392af65a191154e3586e7f5a1066e.tar.gz gcc-c3a63fb3854392af65a191154e3586e7f5a1066e.tar.bz2 | |
c++: Avoid [[nodiscard]] warning in requires-expr [PR98019]
If we aren't really evaluating the expression, it doesn't matter that the
return value is discarded.
gcc/cp/ChangeLog:
PR c++/98019
* cvt.c (maybe_warn_nodiscard): Check c_inhibit_evaluation_warnings.
gcc/testsuite/ChangeLog:
* g++.dg/cpp2a/concepts-nodiscard1.C: Remove xfail.
Diffstat (limited to 'gcc/cp')
| -rw-r--r-- | gcc/cp/cvt.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/cp/cvt.c b/gcc/cp/cvt.c index bcd7c5a..29ceaeb 100644 --- a/gcc/cp/cvt.c +++ b/gcc/cp/cvt.c @@ -1031,6 +1031,9 @@ cp_get_callee_fndecl_nofold (tree call) static void maybe_warn_nodiscard (tree expr, impl_conv_void implicit) { + if (!warn_unused_result || c_inhibit_evaluation_warnings) + return; + tree call = expr; if (TREE_CODE (expr) == TARGET_EXPR) call = TARGET_EXPR_INITIAL (expr); |