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| author | Marek Polacek <polacek@redhat.com> | 2019-08-16 20:40:36 +0000 |
|---|---|---|
| committer | Marek Polacek <mpolacek@gcc.gnu.org> | 2019-08-16 20:40:36 +0000 |
| commit | a98b732181472edb4591059c868082e5e708a21c (patch) | |
| tree | be645380e2969f5a52d2d690ddc6001ff9f17840 /gcc | |
| parent | 639f51ba26d7cdd47e5fc7a17fbae5e8d791a359 (diff) | |
| download | gcc-a98b732181472edb4591059c868082e5e708a21c.zip gcc-a98b732181472edb4591059c868082e5e708a21c.tar.gz gcc-a98b732181472edb4591059c868082e5e708a21c.tar.bz2 | |
re PR c++/85827 (false positive for -Wunused-but-set-variable because of constexpr-if)
PR c++/85827
g++.dg/cpp1z/constexpr-if29.C: New test.
From-SVN: r274587
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/cpp1z/constexpr-if29.C | 28 |
2 files changed, 33 insertions, 0 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog index 938ec48..c1ffe2e 100644 --- a/gcc/cp/ChangeLog +++ b/gcc/cp/ChangeLog @@ -1,3 +1,8 @@ +2019-08-16 Marek Polacek <polacek@redhat.com> + + PR c++/85827 + * g++.dg/cpp1z/constexpr-if29.C: New test. + 2019-08-15 Jason Merrill <jason@redhat.com> PR c++/90393 - ICE with thow in ?: diff --git a/gcc/testsuite/g++.dg/cpp1z/constexpr-if29.C b/gcc/testsuite/g++.dg/cpp1z/constexpr-if29.C new file mode 100644 index 0000000..a40912a --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp1z/constexpr-if29.C @@ -0,0 +1,28 @@ +// PR c++/85827 +// { dg-do compile { target c++17 } } +// { dg-options "-Wunused-variable -Wunused-parameter" } + +template <int N> int f() +{ + constexpr bool _1 = N == 1; + constexpr bool _2 = N == 2; + constexpr bool _3 = N == 3; + + if constexpr (_1) { + return 5; + } else if constexpr (_2) { + return 1; + } else if constexpr (_3) { + return 7; + } +} + +int a() { + return f<1>(); +} +int b() { + return f<2>(); +} +int c() { + return f<3>(); +} |