only mutable ranges are iterable

2018-04-26 00:44:42 +02:00 · 2018-04-26 00:44:42 +02:00 · 11a366f469
parent e0986692ef
commit 11a366f469
1 changed files with 2 additions and 1 deletions
--- a/ostd/build/make.hh
+++ b/ostd/build/make.hh
@ -132,7 +132,8 @@ private:
        if constexpr (std::is_constructible_v<std::string, R const &>) {
            p_deps.emplace_back(v);
        } else {
-            for (auto const &sv: v) {
+            R mr{v};
+            for (auto const &sv: mr) {
                p_deps.emplace_back(sv);
            }
        }