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Support set -add on flag types

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Fixes #1082
This commit is contained in:
Maxime Coste 2016-12-27 21:52:53 +00:00
parent 6d3842af5b
commit 243bcf6a6d
2 changed files with 10 additions and 2 deletions
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9
src/enum.hh
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@ -73,6 +73,15 @@ EnableIfWithoutBitOps<Enum> option_from_string(StringView str, Enum& e)
e = it->value; e = it->value;
} }
template<typename Flags, typename = decltype(enum_desc(Flags{}))>
EnableIfWithBitOps<Flags, bool> option_add(Flags& opt, StringView str)
{
Flags res = Flags{};
option_from_string(str, res);
opt |= res;
return res != (Flags)0;
}
} }
#endif // enum_hh_INCLUDED #endif // enum_hh_INCLUDED

3
src/option_types.hh
View File

@ -214,8 +214,7 @@ inline bool option_add(StronglyTypedNumber<RealType, ValueType>& opt,
return val != 0; return val != 0;
} }
template<typename T> inline bool option_add(...)
bool option_add(T&, StringView str)
{ {
throw runtime_error("no add operation supported for this option type"); throw runtime_error("no add operation supported for this option type");
} }