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113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
#ifndef OPENMW_ESM_VARIANT_H
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#define OPENMW_ESM_VARIANT_H
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#include <iosfwd>
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#include <string>
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#include <tuple>
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#include <variant>
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namespace ESM
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{
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class ESMReader;
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class ESMWriter;
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enum VarType
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{
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VT_Unknown = 0,
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VT_None,
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VT_Short, // stored as a float, kinda
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VT_Int,
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VT_Long, // stored as a float
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VT_Float,
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VT_String
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};
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class Variant
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{
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VarType mType;
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std::variant<std::monostate, int, float, std::string> mData;
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public:
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enum Format
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{
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Format_Global,
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Format_Gmst,
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Format_Info,
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Format_Local // local script variables in save game files
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};
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Variant()
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: mType(VT_None)
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, mData(std::monostate{})
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{
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}
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explicit Variant(const std::string& value)
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: mType(VT_String)
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, mData(value)
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{
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}
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explicit Variant(std::string&& value)
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: mType(VT_String)
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, mData(std::move(value))
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{
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}
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explicit Variant(int value)
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: mType(VT_Long)
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, mData(value)
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{
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}
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explicit Variant(float value)
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: mType(VT_Float)
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, mData(value)
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{
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}
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VarType getType() const { return mType; }
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const std::string& getString() const;
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///< Will throw an exception, if value can not be represented as a string.
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int getInteger() const;
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///< Will throw an exception, if value can not be represented as an integer (implicit
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/// casting of float values is permitted).
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float getFloat() const;
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///< Will throw an exception, if value can not be represented as a float value.
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void read(ESMReader& esm, Format format);
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void write(ESMWriter& esm, Format format) const;
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void write(std::ostream& stream) const;
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///< Write in text format.
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void setType(VarType type);
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void setString(const std::string& value);
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///< Will throw an exception, if type is not compatible with string.
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void setString(std::string&& value);
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///< Will throw an exception, if type is not compatible with string.
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void setInteger(int value);
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///< Will throw an exception, if type is not compatible with integer.
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void setFloat(float value);
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///< Will throw an exception, if type is not compatible with float.
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friend bool operator==(const Variant& left, const Variant& right)
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{
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return std::tie(left.mType, left.mData) == std::tie(right.mType, right.mData);
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}
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friend bool operator!=(const Variant& left, const Variant& right) { return !(left == right); }
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};
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std::ostream& operator<<(std::ostream& stream, const Variant& value);
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}
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#endif
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