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| author | Marek Polacek <polacek@redhat.com> | 2021-05-12 11:19:13 -0400 |
|---|---|---|
| committer | Marek Polacek <polacek@redhat.com> | 2021-05-12 13:06:28 -0400 |
| commit | 3a2b12bc5a7da7f0c5cf2ef4879d435a02feda8d (patch) | |
| tree | 2407ce65a6581f1fac2fff5020ab9d31901dd893 /gcc | |
| parent | fa6894ec9ce25f5aff10ec176212383f5c88b1ec (diff) | |
| download | gcc-3a2b12bc5a7da7f0c5cf2ef4879d435a02feda8d.zip gcc-3a2b12bc5a7da7f0c5cf2ef4879d435a02feda8d.tar.gz gcc-3a2b12bc5a7da7f0c5cf2ef4879d435a02feda8d.tar.bz2 | |
c++: Disable -Wint-in-bool-context in instantiations
This warning is of questionable value when it's emitted when
instantiating a template, as in the following testcase. It could be
silenced by writing hb(i) << 1 instead of 2 * hb(i) but that's
unnecessary obfuscation.
gcc/cp/ChangeLog:
* pt.c (tsubst_copy_and_build): Add warn_int_in_bool_context
sentinel.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wint-in-bool-context-2.C: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/pt.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/Wint-in-bool-context-2.C | 16 |
2 files changed, 17 insertions, 0 deletions
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c index 85c05af..d7d6a3f 100644 --- a/gcc/cp/pt.c +++ b/gcc/cp/pt.c @@ -19801,6 +19801,7 @@ tsubst_copy_and_build (tree t, warning_sentinel s(warn_useless_cast); warning_sentinel s2(warn_ignored_qualifiers); + warning_sentinel s3(warn_int_in_bool_context); switch (TREE_CODE (t)) { case CAST_EXPR: diff --git a/gcc/testsuite/g++.dg/warn/Wint-in-bool-context-2.C b/gcc/testsuite/g++.dg/warn/Wint-in-bool-context-2.C new file mode 100644 index 0000000..6cb482d --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wint-in-bool-context-2.C @@ -0,0 +1,16 @@ +// { dg-do compile { target c++11 } } +// { dg-options "-Wint-in-bool-context" } + +unsigned hb(unsigned i) { return ~i; } + +template<typename T> +void f(int i) +{ + auto l = [i]() { return T(2 * hb(i)); }; // { dg-bogus "in boolean context" } + (void) l; +} + +int main() +{ + f<bool>(0); +} |