#ifndef SSCRIPTINTERPRETER_HPP
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#define SSCRIPTINTERPRETER_HPP
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#include <functional>
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#include <map>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "BaseFunction.hpp"
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#include "Token.hpp"
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#include "Value.hpp"
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using FunctionValidator =
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std::function<void(const std::vector<Token> &, size_t &, const std::unordered_map<std::string, Value> &)>;
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using VariableContext = std::map<std::string, Value>;
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class ScriptInterpreter {
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public:
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void registerModule(const std::string & name, std::shared_ptr<BaseFunction> fn);
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void executeScript(const std::string & source, const std::string & filename,
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const std::string & _namespace = "DEFAULT", bool ignore_tags = false);
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private:
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std::unordered_map<std::string, FunctionValidator> functionValidators;
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std::unordered_map<std::string, std::shared_ptr<BaseFunction>> functionObjects;
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// store the current script's variables
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std::unordered_map<std::string, VariableContext> variables;
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// store the current script's function arguments
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std::unordered_map<std::string, std::vector<Value>> functionParameters;
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std::unordered_map<std::string, std::string> functionBodies;
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std::string filename;
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std::string source;
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std::string contextPrefix;
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[[nodiscard]] std::vector<Value> parseFunctionArguments(const std::vector<Token> & tokens,
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std::size_t & index) const;
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[[nodiscard]] Value evaluateExpression(const Token & token) const;
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// type handlers
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void setVariable(const std::string & name, Value & value, const std::string & context = "default",
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bool exception_if_exists = false, bool exception_if_not_exists = false) {
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if (exception_if_exists && variables[context].find(name) != variables[context].end()) {
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THROW_VARIABLE_REDEFINITION_ERROR(name, value.token);
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}
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if (exception_if_not_exists && variables[context].find(name) == variables[context].end()) {
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THROW_UNDEFINED_VARIABLE_ERROR(name, value.token);
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}
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value.name = name;
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value.context = context;
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this->variables[context][name] = value;
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}
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[[nodiscard]] Value getVariable(const std::string & name, const std::string & context = "default") const {
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for (auto it = variables.begin(); it != variables.end(); ++it) {
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if (it->first == context) {
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const auto & innerMap = it->second.find(name);
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if (innerMap != it->second.end()) {
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return it->second.at(name);
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}
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}
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}
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throw std::runtime_error("Variable not found: " + name);
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};
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[[nodiscard]] Value getVariable(const Token & token, const std::string & context = "default",
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const std::string & file = __FILE__, const int & line = __LINE__) const {
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for (auto it = variables.begin(); it != variables.end(); ++it) {
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if (it->first == context) {
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const auto & innerMap = it->second.find(token.lexeme);
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if (innerMap != it->second.end()) {
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return it->second.at(token.lexeme);
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}
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}
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}
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THROW_UNDEFINED_VARIABLE_ERROR_HELPER(token.lexeme, token, file, line);
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};
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[[nodiscard]] std::map<std::string, Value> getcontextVariables(const std::string & context) const {
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auto it = variables.find(context);
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if (it != variables.end()) {
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return it->second;
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}
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throw std::runtime_error("Context not found: " + context);
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}
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/**
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* Checks if a variable exists within the specified context.
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*
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* @param name The name of the variable to check.
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* @param context The context in which to search for the variable (defaults to "default").
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* @param file The source file where the check is performed (for error reporting).
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* @param line The line number where the check is performed (for error reporting).
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* @return True if the variable exists in the specified context.
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* @throws Throws an undefined variable error if the variable is not found.
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*/
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[[nodiscard]] bool variableExists(const std::string & name, const std::string & context = "default",
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const std::string & file = __FILE__, const int & line = __LINE__) const {
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for (auto it = variables.begin(); it != variables.end(); ++it) {
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if (it->first == context) {
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const auto & innerMap = it->second.find(name);
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if (innerMap != it->second.end()) {
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return true;
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}
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}
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}
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THROW_UNDEFINED_VARIABLE_ERROR_HELPER(name, Token(TokenType::Variable, name, name, 0, 0), file, line);
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}
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/**
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* Checks if a variable exists within the specified context using a Token.
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*
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* @param token The token representing the variable to check.
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* @param context The context in which to search for the variable (defaults to "default").
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* @param file The source file where the check is performed (for error reporting).
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* @param line The line number where the check is performed (for error reporting).
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* @return True if the variable exists in the specified context.
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* @throws Throws an undefined variable error if the variable is not found.
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*/
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[[nodiscard]] bool variableExists(const Token & token, const std::string & context = "default",
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const std::string & file = __FILE__, const int & line = __LINE__) const {
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return this->variableExists(token.lexeme, context, file, line);
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}
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void handleFunctionCall(const std::vector<Token> & tokens, std::size_t & i);
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void handleVariableReference(const std::vector<Token> & tokens, std::size_t & i);
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static void handleComment(std::size_t & i) { i++; }
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static void handleSemicolon(std::size_t & i) { i++; };
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void handleStringDeclaration(const std::vector<Token> & tokens, std::size_t & i);
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void handleBooleanDeclaration(const std::vector<Token> & tokens, std::size_t & i);
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void handleNumberDeclaration(const std::vector<Token> & tokens, std::size_t & i, TokenType type);
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void handleFunctionDeclaration(const std::vector<Token> & tokens, std::size_t & i);
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std::string getContextName(const std::string & suffix) const { return this->filename + "::" + suffix; }
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};
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#endif // SSCRIPTINTERPRETER_HPP
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