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88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#ifndef enum_hh_INCLUDED
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#define enum_hh_INCLUDED
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#include "flags.hh"
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#include "string.hh"
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#include "exception.hh"
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#include "containers.hh"
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namespace Kakoune
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{
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template<typename T, size_t N>
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struct Array
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{
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constexpr size_t size() const { return N; }
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constexpr const T& operator[](int i) const { return m_data[i]; }
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constexpr const T* begin() const { return m_data; }
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constexpr const T* end() const { return m_data+N; }
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T m_data[N];
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};
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template<typename T> struct EnumDesc { T value; StringView name; };
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template<typename Flags, typename = decltype(enum_desc(Flags{}))>
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EnableIfWithBitOps<Flags, String> option_to_string(Flags flags)
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{
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constexpr auto desc = enum_desc(Flags{});
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String res;
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for (int i = 0; i < desc.size(); ++i)
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{
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if (not (flags & desc[i].value))
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continue;
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if (not res.empty())
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res += "|";
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res += desc[i].name;
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}
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return res;
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}
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template<typename Enum, typename = decltype(enum_desc(Enum{}))>
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EnableIfWithoutBitOps<Enum, String> option_to_string(Enum e)
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{
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constexpr auto desc = enum_desc(Enum{});
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auto it = find_if(desc, [e](const EnumDesc<Enum>& d) { return d.value == e; });
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if (it != desc.end())
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return it->name.str();
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kak_assert(false);
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return {};
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}
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template<typename Flags, typename = decltype(enum_desc(Flags{}))>
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EnableIfWithBitOps<Flags> option_from_string(StringView str, Flags& flags)
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{
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constexpr auto desc = enum_desc(Flags{});
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flags = Flags{};
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for (auto s : str | split<StringView>('|'))
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{
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auto it = find_if(desc, [s](const EnumDesc<Flags>& d) { return d.name == s; });
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if (it == desc.end())
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throw runtime_error(format("invalid flag value '{}'", s));
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flags |= it->value;
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}
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}
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template<typename Enum, typename = decltype(enum_desc(Enum{}))>
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EnableIfWithoutBitOps<Enum> option_from_string(StringView str, Enum& e)
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{
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constexpr auto desc = enum_desc(Enum{});
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auto it = find_if(desc, [str](const EnumDesc<Enum>& d) { return d.name == str; });
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if (it == desc.end())
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throw runtime_error(format("invalid enum value '{}'", str));
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e = it->value;
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}
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template<typename Flags, typename = decltype(enum_desc(Flags{}))>
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EnableIfWithBitOps<Flags, bool> option_add(Flags& opt, StringView str)
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{
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Flags res = Flags{};
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option_from_string(str, res);
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opt |= res;
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return res != (Flags)0;
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}
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}
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#endif // enum_hh_INCLUDED
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