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-rw-r--r--include/cru/common/base.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/cru/common/base.hpp b/include/cru/common/base.hpp
index daee971f..20dd811d 100644
--- a/include/cru/common/base.hpp
+++ b/include/cru/common/base.hpp
@@ -42,4 +42,6 @@ struct Interface {
[[noreturn]] inline void UnreachableCode() {
throw std::runtime_error("Unreachable code.");
}
+
+using Index = gsl::index;
} // namespace cru