diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2016-01-05 11:55:15 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2016-01-05 11:55:15 +0200 |
commit | 9fb791e9fad6c63fc1dac49f4d05ae63b8a3db9b (patch) | |
tree | d60322d4382ca5f97b676c5abe2e39524f35eab4 /build2/config/utility.txx | |
parent | f159b1dac68c8714f7ba71ca168e3b695891aad9 (diff) |
Rename build directory/namespace to build2
Diffstat (limited to 'build2/config/utility.txx')
-rw-r--r-- | build2/config/utility.txx | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/build2/config/utility.txx b/build2/config/utility.txx new file mode 100644 index 0000000..c88a34f --- /dev/null +++ b/build2/config/utility.txx @@ -0,0 +1,45 @@ +// file : build2/config/utility.txx -*- C++ -*- +// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd +// license : MIT; see accompanying LICENSE file + +#include <build2/scope> + +namespace build2 +{ + namespace config + { + template <typename T> + std::pair<std::reference_wrapper<const value>, bool> + required (scope& root, const variable& var, const T& def_value, bool ovr) + { + using result = std::pair<std::reference_wrapper<const value>, bool>; + + if (auto l = root[var]) + { + if (l.belongs (*global_scope)) + return result (root.assign (var) = *l, true); + + if (!ovr || l.belongs (root)) + return result (*l, false); + } + + 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; + } + } +} |