Function string_value_of

src/env.cpp:62–70

}

std::string string_value_of(const char* name, std::string fallback)
{
    auto e = env(name);
    if(e.empty())
        return fallback;
    auto rv = e.front();
    access_envs()([&](auto& m) { m[name] = rv; });
    return rv;
}

std::vector<std::string> env(const char* name)
{