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// file : build/config/utility.txx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/scope>
namespace build
{
namespace config
{
template <typename T>
std::pair<std::reference_wrapper<const value>, bool>
required (scope& root, const variable& var, const T& def_value)
{
using result = std::pair<std::reference_wrapper<const value>, bool>;
if (auto l = root[var])
{
return l.belongs (*global_scope)
? result (root.assign (var) = *l, true)
: result (*l, false);
}
else
return result (root.assign (var) = def_value, true);
}
template <typename T>
bool
find_option (const char* option, T& s, const char* var)
{
if (auto l = s[var])
{
for (const std::string& s: as<strings> (*l))
{
if (s == option)
return true;
}
}
return false;
}
}
}
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