#include "ScriptInterpreter.hpp"
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#include <iostream>
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#include <stdexcept>
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#include <unordered_map>
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#include <utility>
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#include "Lexer.hpp"
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#include "ScriptExceptionMacros.h"
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#include "Value.hpp"
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void ScriptInterpreter::registerFunction(const std::string & name, std::shared_ptr<BaseFunction> fn) {
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functionObjects[name] = std::move(fn);
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}
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Value ScriptInterpreter::evaluateExpression(const Token & token) const {
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if (token.type == TokenType::StringLiteral) {
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return Value::fromString(token.lexeme);
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}
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if (token.type == TokenType::IntLiteral) {
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try {
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return Value::fromInt(std::stoi(token.lexeme));
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} catch (const std::invalid_argument & e) {
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throw std::runtime_error("Invalid integer literal: " + token.lexeme);
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} catch (const std::out_of_range & e) {
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throw std::runtime_error("Integer literal out of range: " + token.lexeme);
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}
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}
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if (token.type == TokenType::DoubleLiteral) {
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try {
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return Value::fromDouble(std::stod(token.lexeme));
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} catch (const std::invalid_argument & e) {
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throw std::runtime_error("Invalid double literal: " + token.lexeme);
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} catch (const std::out_of_range & e) {
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throw std::runtime_error("Double literal out of range: " + token.lexeme);
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}
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}
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if (token.type == TokenType::Variable) {
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if (variables.find(token.lexeme) != variables.end()) {
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return variables.at(token.lexeme);
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}
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THROW_UNDEFINED_VARIABLE_ERROR(token.lexeme, token);
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(token, "string, integer, double, or variable");
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}
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return Value();
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}
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std::vector<Value> ScriptInterpreter::parseArguments(const std::vector<Token> & tokens,
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std::size_t & current_index) const {
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std::vector<Value> args;
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if (current_index >= tokens.size() || tokens[current_index].type != TokenType::Identifier) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[current_index], tokenTypeNames.at(TokenType::Identifier));
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}
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current_index++; // Skip function name
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if (current_index >= tokens.size() || tokens[current_index].type != TokenType::LeftParenthesis) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[current_index], tokenTypeNames.at(TokenType::LeftParenthesis));
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}
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current_index++; // Skip '('
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while (current_index < tokens.size() && tokens[current_index].type != TokenType::RightParenthesis) {
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args.push_back(evaluateExpression(tokens[current_index]));
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current_index++;
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if (current_index < tokens.size() && tokens[current_index].type == TokenType::Comma) {
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current_index++; // Skip ','
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if (current_index >= tokens.size() || tokens[current_index].type == TokenType::RightParenthesis) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[current_index], "expression after comma");
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}
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} else if (tokens[current_index].type != TokenType::RightParenthesis && current_index < tokens.size()) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[current_index], "',' or ')'");
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}
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}
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if (current_index >= tokens.size() || tokens[current_index].type != TokenType::RightParenthesis) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[current_index], "')'");
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}
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current_index++; // Skip ')'
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current_index = current_index;
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return args;
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}
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void ScriptInterpreter::handleStringDeclaration(const std::vector<Token> & tokens, std::size_t & i) {
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const auto varName = tokens[i].lexeme;
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const auto varType = tokens[i].variableType;
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i++; // Skip variable name
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if (i < tokens.size() && tokens[i].type == TokenType::Equals) {
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i++; // Skip '='
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if (i < tokens.size() && tokens[i].type == TokenType::Variable) {
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if (variables.find(tokens[i].lexeme) == variables.end()) {
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THROW_UNDEFINED_VARIABLE_ERROR(tokens[i].lexeme, tokens[i]);
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} else {
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if (variables[tokens[i].lexeme].type != Variables::Type::VT_STRING) {
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THROW_VARIABLE_TYPE_MISSMATCH_ERROR(varName, Variables::TypeToString(Variables::Type::VT_STRING),
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tokens[i].lexeme, variables[tokens[i].lexeme].TypeToString(),
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tokens[i]);
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}
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variables[varName] = variables[tokens[i].lexeme];
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i++; // Skip variable name
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expectSemicolon(tokens, i, "after string variable declaration");
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}
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} else if (i < tokens.size() && tokens[i].type == TokenType::StringLiteral) {
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variables[varName] = Value::fromString(tokens[i].lexeme);
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i++; // Skip string literal
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expectSemicolon(tokens, i, "after string declaration");
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i], "string literal after '='");
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}
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i], "= after string declaration");
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}
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}
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void ScriptInterpreter::handleNumberDeclaration(const std::vector<Token> & tokens, std::size_t & i, TokenType type) {
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const auto varName = tokens[i].lexeme;
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const auto varType = tokens[i].variableType;
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i++; // Skip variable name
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if (i < tokens.size() && tokens[i].type == TokenType::Equals) {
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i++; // Skip '='
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if (i < tokens.size()) {
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if (type == TokenType::IntDeclaration && tokens[i].type == TokenType::IntLiteral) {
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try {
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if (variables.find(varName) != variables.end()) {
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THROW_VARIABLE_REDEFINITION_ERROR(varName, tokens[i]);
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}
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variables[varName] = Value::fromInt(std::stoi(tokens[i].lexeme));
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i++; // Skip int literal
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} catch (const std::invalid_argument & e) {
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throw std::runtime_error("Invalid integer literal in declaration: " + tokens[i].lexeme);
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} catch (const std::out_of_range & e) {
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throw std::runtime_error("Integer literal out of range in declaration: " + tokens[i].lexeme);
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}
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} else if (type == TokenType::DoubleDeclaration && tokens[i].type == TokenType::DoubleLiteral) {
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try {
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if (variables.find(varName) != variables.end()) {
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THROW_VARIABLE_REDEFINITION_ERROR(varName, tokens[i]);
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}
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variables[varName] = Value::fromDouble(std::stod(tokens[i].lexeme));
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i++; // Skip double literal
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} catch (const std::invalid_argument & e) {
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throw std::runtime_error("Invalid double literal in declaration: " + tokens[i].lexeme);
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} catch (const std::out_of_range & e) {
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throw std::runtime_error("Double literal out of range in declaration: " + tokens[i].lexeme);
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}
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} else {
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const std::string expectedType = type == TokenType::IntDeclaration ? "int" : "double";
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THROW_VARIABLE_TYPE_MISSMATCH_ERROR(varName, expectedType, "",
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getVariableTypeFromTokenTypeAsString(tokens[i].type), tokens[i]);
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}
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expectSemicolon(tokens, i, "after variable declaration");
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i - 1], "literal after '='");
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}
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i], "= after variable declaration, variable name: " + varName);
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}
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}
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void ScriptInterpreter::handleFunctionCall(const std::vector<Token> & tokens, std::size_t & i) {
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std::string funcName = tokens[i].lexeme;
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auto it = functionObjects.find(funcName);
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if (it == functionObjects.end()) {
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throw std::runtime_error("Unknown function: " + funcName);
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}
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it->second->validate(tokens, i);
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std::vector<Value> args = parseArguments(tokens, i);
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it->second->call(args);
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if (i < tokens.size() && tokens[i].type == TokenType::Semicolon) {
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i++; // Skip ';' after function call
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}
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}
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void ScriptInterpreter::handleVariableReference(const std::vector<Token> & tokens, std::size_t & i) {
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//THROW_UNEXPECTED_TOKEN_ERROR(tokens[i], "function call or variable assignment (not yet implemented)");
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const auto varName = tokens[i].lexeme;
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const auto varType = tokens[i].variableType;
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i++; // Skip variable token to avoid infinite loop
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if (i < tokens.size() && tokens[i].type == TokenType::Equals) {
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i++; // Skip '='
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if (i < tokens.size()) {
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if (variables.find(varName) == variables.end()) {
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THROW_UNDEFINED_VARIABLE_ERROR(varName, tokens[i]);
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}
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variables[varName] = evaluateExpression(tokens[i]);
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i++; // Skip value
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expectSemicolon(tokens, i, "after variable assignment");
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i - 1], "value after '='");
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}
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} else {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i - 1], "'=' for assignment");
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}
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}
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void ScriptInterpreter::handleComment(std::size_t & i) {
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i++; // Skip comment token
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}
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void ScriptInterpreter::handleSemicolon(std::size_t & i) {
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i++; // Skip semicolon token
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}
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void ScriptInterpreter::expectSemicolon(const std::vector<Token> & tokens, std::size_t & i,
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const std::string & message) const {
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if (i >= tokens.size() || tokens[i].type != TokenType::Semicolon) {
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THROW_UNEXPECTED_TOKEN_ERROR(tokens[i - 1], "; " + message);
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} else {
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i++; // Skip ';'
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}
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}
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void ScriptInterpreter::executeScript(const std::string & source, const std::string & filename, bool debug) {
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Lexer lexer(source, filename);
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auto tokens = lexer.tokenize();
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bool insideScript = false;
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for (std::size_t i = 0; i < tokens.size();) {
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const auto & token = tokens[i];
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if (token.type == TokenType::EndOfFile) {
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break;
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}
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if (token.type == TokenType::ParserOpenTag) {
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insideScript = true;
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i++; // Skip the open tag
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continue;
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}
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if (token.type == TokenType::ParserCloseTag) {
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insideScript = false;
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i++; // Skip the close tag
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continue;
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}
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if (!insideScript) {
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// Csak kiíratás, ha nem vagyunk script tagben
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std::cout << token.lexeme;
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i++;
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continue;
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}
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// A szokásos feldolgozás csak ha belül vagyunk
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switch (token.type) {
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case TokenType::StringDeclaration:
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handleStringDeclaration(tokens, i);
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break;
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case TokenType::IntDeclaration:
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case TokenType::DoubleDeclaration:
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handleNumberDeclaration(tokens, i, token.type);
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break;
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case TokenType::Identifier:
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handleFunctionCall(tokens, i);
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break;
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case TokenType::Variable:
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handleVariableReference(tokens, i);
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break;
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case TokenType::Comment:
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handleComment(i);
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break;
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case TokenType::Semicolon:
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handleSemicolon(i);
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break;
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default:
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throw std::runtime_error("Unexpected token inside script: " + token.lexeme);
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}
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}
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}
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