Include `stdexcept` if exceptions enabled

martinmoene / span-lite

span lite - A C++20-like span for C++98, C++11 and later in a single-file header-only library

Boost Software License 1.0

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Include `stdexcept` if exceptions enabled #42

Closed flexferrum closed 5 years ago

flexferrum commented 5 years ago

Resolves #41

Currently, span.hpp includes stdexcept only if contract violation enabled. But throws std::out_of_range under the simple ! span_CONFIG( NO_EXCEPTIONS ) check. This PR fixes this issue and allows std exception when exceptions enabled.