comparator: indexed comparator should be const

2017-06-29 15:28:37 +10:00 · 2017-06-29 15:28:37 +10:00 · 3f8c490733
commit 3f8c490733
parent 01ed956ee4
1 changed files with 1 additions and 1 deletions
--- a/types/comparator.hpp
+++ b/types/comparator.hpp
@ -61,7 +61,7 @@ namespace util::comparator {
    template <typename T>
    struct indexed {
        constexpr
-        bool operator() (const T &a, const T &b)
+        bool operator() (const T &a, const T &b) const
        {
            for (auto x: util::zip (a, b)) {
                const auto &[i,j] = x; // clang-4.0: workaround for segfault.