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Implement some generic utilities to convert flags to/from strings

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This commit is contained in:
Maxime Coste 2015-11-19 00:17:52 +00:00
parent 784ab635ee
commit daf041e839
1 changed files with 36 additions and 20 deletions
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56
src/option_types.hh
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@ -234,32 +234,48 @@ enum class AutoInfo
template<>
struct WithBitOps<AutoInfo> : std::true_type {};
constexpr AutoInfo autoinfo_values[] = { AutoInfo::Command, AutoInfo::OnKey, AutoInfo::Normal };
constexpr StringView autoinfo_names[] = { "command", "onkey", "normal" };
template<typename Flags, typename = EnableIfWithBitOps<Flags>>
String to_string(Flags flags, ArrayView<const Flags> values, ArrayView<const StringView> names)
{
kak_assert(values.size() == names.size());
String res;
for (int i = 0; i < values.size(); ++i)
{
if (not (flags & values[i]))
continue;
if (not res.empty())
res += "|";
res += names[i];
}
return res;
}
template<typename Flags, typename = EnableIfWithBitOps<Flags>>
Flags string_to_flags(StringView str, ArrayView<const Flags> values, ArrayView<const StringView> names)
{
kak_assert(values.size() == names.size());
Flags flags{};
for (auto s : split(str, '|'))
{
auto it = std::find(names.begin(), names.end(), s);
if (it == names.end())
throw runtime_error(format("invalid flag value '{}'", s));
flags |= values[it - names.begin()];
}
return flags;
}
inline String option_to_string(AutoInfo opt)
{
String res;
if (opt & AutoInfo::Command)
res = "command";
if (opt & AutoInfo::OnKey)
res += res.empty() ? "onkey" : "|onkey";
if (opt & AutoInfo::Normal)
res += res.empty() ? "normal" : "|normal";
return res;
return to_string<AutoInfo>(opt, autoinfo_values, autoinfo_names);
}
inline void option_from_string(StringView str, AutoInfo& opt)
{
opt = AutoInfo::None;
for (auto s : split(str, '|'))
{
if (s == "command")
opt |= AutoInfo::Command;
else if (s == "onkey")
opt |= AutoInfo::OnKey;
else if (s == "normal")
opt |= AutoInfo::Normal;
else
throw runtime_error(format("invalid value '{}'", s));
}
opt = string_to_flags<AutoInfo>(str, autoinfo_values, autoinfo_names);
}
}