88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
#pragma once
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#include <hex.hpp>
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#include <string>
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#include <vector>
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#include <queue>
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#include <unordered_map>
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#include <functional>
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#include <optional>
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namespace hex {
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enum class TokenType {
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Number,
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Variable,
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Function,
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Operator,
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Bracket
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};
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enum class Operator : u16 {
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Invalid = 0x000,
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Assign = 0x010,
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Or = 0x020,
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Xor = 0x030,
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And = 0x040,
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BitwiseOr = 0x050,
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BitwiseXor = 0x060,
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BitwiseAnd = 0x070,
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Equals = 0x080,
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NotEquals = 0x081,
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GreaterThan = 0x090,
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LessThan = 0x091,
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GreaterThanOrEquals = 0x092,
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LessThanOrEquals = 0x093,
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ShiftLeft = 0x0A0,
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ShiftRight = 0x0A1,
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Addition = 0x0B0,
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Subtraction = 0x0B1,
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Multiplication = 0x0C0,
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Division = 0x0C1,
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Modulus = 0x0C2,
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Exponentiation = 0x1D0,
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Combine = 0x0E0,
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BitwiseNot = 0x0F0,
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Not = 0x0F1
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};
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enum class BracketType : std::uint8_t {
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Left,
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Right
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};
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struct Token {
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TokenType type;
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long double number;
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Operator op;
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BracketType bracketType;
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std::string name;
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std::vector<long double> arguments;
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};
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class MathEvaluator {
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public:
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MathEvaluator() = default;
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std::optional<long double> evaluate(std::string input);
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void registerStandardVariables();
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void registerStandardFunctions();
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void setVariable(std::string name, long double value);
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void setFunction(std::string name, std::function<std::optional<long double>(std::vector<long double>)> function, size_t minNumArgs, size_t maxNumArgs);
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std::unordered_map<std::string, long double>& getVariables() { return this->m_variables; }
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private:
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std::queue<Token> parseInput(const char *input);
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std::queue<Token> toPostfix(std::queue<Token> inputQueue);
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std::optional<long double> evaluate(std::queue<Token> postfixTokens);
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std::unordered_map<std::string, long double> m_variables;
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std::unordered_map<std::string, std::function<std::optional<long double>(std::vector<long double>)>> m_functions;
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};
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} |