#include "Parser/Parser.hpp"
|
#include <stack>
|
|
#include "Interpreter/OperationsFactory.hpp"
|
#include "Lexer/Operators.hpp"
|
|
// Más szükséges include-ok, ha kellenek
|
namespace Parser {
|
|
const std::unordered_map<std::string, Lexer::Tokens::Type> Parser::keywords = {
|
{ "if", Lexer::Tokens::Type::KEYWORD },
|
{ "else", Lexer::Tokens::Type::KEYWORD },
|
{ "while", Lexer::Tokens::Type::KEYWORD },
|
{ "for", Lexer::Tokens::Type::KEYWORD },
|
{ "return", Lexer::Tokens::Type::KEYWORD_RETURN },
|
{ "function", Lexer::Tokens::Type::KEYWORD_FUNCTION_DECLARATION },
|
// Régebbiek:
|
{ "const", Lexer::Tokens::Type::KEYWORD },
|
{ "true", Lexer::Tokens::Type::KEYWORD },
|
{ "false", Lexer::Tokens::Type::KEYWORD },
|
// változó típusok
|
{ "null", Lexer::Tokens::Type::KEYWORD_NULL },
|
{ "int", Lexer::Tokens::Type::KEYWORD_INT },
|
{ "double", Lexer::Tokens::Type::KEYWORD_DOUBLE },
|
{ "float", Lexer::Tokens::Type::KEYWORD_FLOAT },
|
{ "string", Lexer::Tokens::Type::KEYWORD_STRING },
|
{ "boolean", Lexer::Tokens::Type::KEYWORD_BOOLEAN },
|
{ "bool", Lexer::Tokens::Type::KEYWORD_BOOLEAN },
|
// ... egyéb kulcsszavak ...
|
};
|
|
const std::unordered_map<Lexer::Tokens::Type, Symbols::Variables::Type> Parser::variable_types = {
|
{ Lexer::Tokens::Type::KEYWORD_INT, Symbols::Variables::Type::INTEGER },
|
{ Lexer::Tokens::Type::KEYWORD_DOUBLE, Symbols::Variables::Type::DOUBLE },
|
{ Lexer::Tokens::Type::KEYWORD_FLOAT, Symbols::Variables::Type::FLOAT },
|
{ Lexer::Tokens::Type::KEYWORD_STRING, Symbols::Variables::Type::STRING },
|
{ Lexer::Tokens::Type::KEYWORD_NULL, Symbols::Variables::Type::NULL_TYPE },
|
{ Lexer::Tokens::Type::KEYWORD_BOOLEAN, Symbols::Variables::Type::BOOLEAN },
|
};
|
|
void Parser::parseVariableDefinition() {
|
Symbols::Variables::Type var_type = parseType();
|
|
Lexer::Tokens::Token id_token = expect(Lexer::Tokens::Type::VARIABLE_IDENTIFIER);
|
std::string var_name = id_token.value;
|
|
if (!var_name.empty() && var_name[0] == '$') {
|
var_name = var_name.substr(1);
|
}
|
const auto ns = Symbols::SymbolContainer::instance()->currentScopeName();
|
|
expect(Lexer::Tokens::Type::OPERATOR_ASSIGNMENT, "=");
|
|
auto expr = parseParsedExpression(var_type);
|
Interpreter::OperationsFactory::defineVariableWithExpression(
|
var_name, var_type, std::move(expr), ns, current_filename_, id_token.line_number, id_token.column_number);
|
expect(Lexer::Tokens::Type::PUNCTUATION, ";");
|
}
|
|
void Parser::parseFunctionDefinition() {
|
expect(Lexer::Tokens::Type::KEYWORD_FUNCTION_DECLARATION);
|
Lexer::Tokens::Token id_token = expect(Lexer::Tokens::Type::IDENTIFIER);
|
std::string func_name = id_token.value;
|
Symbols::Variables::Type func_return_type = Symbols::Variables::Type::NULL_TYPE;
|
expect(Lexer::Tokens::Type::OPERATOR_ASSIGNMENT, "=");
|
expect(Lexer::Tokens::Type::PUNCTUATION, "(");
|
|
Symbols::FunctionParameterInfo param_infos;
|
|
if (currentToken().type != Lexer::Tokens::Type::PUNCTUATION || currentToken().value != ")") {
|
while (true) {
|
// Paraméter típusa
|
Symbols::Variables::Type param_type = parseType(); // Ez elfogyasztja a type tokent
|
|
// Paraméter név ($variable)
|
Lexer::Tokens::Token param_id_token = expect(Lexer::Tokens::Type::VARIABLE_IDENTIFIER);
|
std::string param_name = param_id_token.value;
|
if (!param_name.empty() && param_name[0] == '$') { // '$' eltávolítása
|
param_name = param_name.substr(1);
|
}
|
|
param_infos.push_back({ param_name, param_type });
|
|
// Vessző vagy zárójel következik?
|
if (match(Lexer::Tokens::Type::PUNCTUATION, ",")) {
|
continue;
|
}
|
if (currentToken().type == Lexer::Tokens::Type::PUNCTUATION && currentToken().value == ")") {
|
break; // Lista vége
|
}
|
reportError("Expected ',' or ')' in parameter list");
|
}
|
}
|
// Most a ')' következik
|
expect(Lexer::Tokens::Type::PUNCTUATION, ")");
|
|
// check if we have a option return type: function name() type { ... }
|
for (const auto & _type : Parser::variable_types) {
|
if (match(_type.first)) {
|
func_return_type = _type.second;
|
break;
|
}
|
}
|
|
Lexer::Tokens::Token opening_brace = expect(Lexer::Tokens::Type::PUNCTUATION, "{");
|
|
// only parse the body if we checked out if not exists the function and created the symbol
|
parseFunctionBody(opening_brace, func_name, func_return_type, param_infos);
|
}
|
|
Symbols::Value Parser::parseNumericLiteral(const std::string & value, bool is_negative, Symbols::Variables::Type type) {
|
try {
|
switch (type) {
|
case Symbols::Variables::Type::INTEGER:
|
{
|
if (value.find('.') != std::string::npos) {
|
throw std::invalid_argument("Floating point value in integer context: " + value);
|
}
|
int v = std::stoi(value);
|
return Symbols::Value(is_negative ? -v : v);
|
}
|
case Symbols::Variables::Type::DOUBLE:
|
{
|
double v = std::stod(value);
|
return Symbols::Value(is_negative ? -v : v);
|
}
|
case Symbols::Variables::Type::FLOAT:
|
{
|
float v = std::stof(value);
|
return Symbols::Value(is_negative ? -v : v);
|
}
|
default:
|
throw std::invalid_argument("Unsupported numeric type");
|
}
|
} catch (const std::invalid_argument & e) {
|
reportError("Invalid numeric literal: " + value + " (" + e.what() + ")");
|
} catch (const std::out_of_range & e) {
|
reportError("Numeric literal out of range: " + value + " (" + e.what() + ")");
|
}
|
|
return Symbols::Value(); // unreachable
|
}
|
|
void Parser::parseFunctionBody(const Lexer::Tokens::Token & opening_brace, const std::string & function_name,
|
Symbols::Variables::Type return_type, const Symbols::FunctionParameterInfo & params) {
|
size_t braceDepth = 0;
|
int peek = 0;
|
int tokenIndex = current_token_index_;
|
Lexer::Tokens::Token currentToken_;
|
Lexer::Tokens::Token closing_brace;
|
|
while (tokenIndex < tokens_.size()) {
|
currentToken_ = peekToken(peek);
|
if (currentToken_.type == Lexer::Tokens::Type::PUNCTUATION) {
|
if (currentToken_.value == "{") {
|
++braceDepth;
|
} else if (currentToken_.value == "}") {
|
if (braceDepth == 0) {
|
closing_brace = currentToken_;
|
break;
|
}
|
--braceDepth;
|
}
|
}
|
tokenIndex++;
|
peek++;
|
}
|
if (braceDepth != 0) {
|
reportError("Unmatched braces in function body");
|
}
|
std::vector<Lexer::Tokens::Token> filtered_tokens;
|
auto startIt = std::find(tokens_.begin(), tokens_.end(), opening_brace);
|
auto endIt = std::find(tokens_.begin(), tokens_.end(), closing_brace);
|
|
if (startIt != tokens_.end() && endIt != tokens_.end() && startIt < endIt) {
|
filtered_tokens = std::vector<Lexer::Tokens::Token>(startIt + 1, endIt);
|
}
|
std::string_view input_string = input_str_view_.substr(opening_brace.end_pos, closing_brace.end_pos);
|
|
current_token_index_ = tokenIndex;
|
expect(Lexer::Tokens::Type::PUNCTUATION, "}");
|
const std::string newns = Symbols::SymbolContainer::instance()->currentScopeName() + "." + function_name;
|
Symbols::SymbolContainer::instance()->create(newns);
|
std::shared_ptr<Parser> parser = std::make_shared<Parser>();
|
parser->parseScript(filtered_tokens, input_string, this->current_filename_);
|
Symbols::SymbolContainer::instance()->enterPreviousScope();
|
// create function
|
Interpreter::OperationsFactory::defineFunction(
|
function_name, params, return_type, Symbols::SymbolContainer::instance()->currentScopeName(),
|
this->current_filename_, currentToken_.line_number, currentToken_.column_number);
|
}
|
|
ParsedExpressionPtr Parser::parseParsedExpression(const Symbols::Variables::Type & expected_var_type) {
|
std::stack<std::string> operator_stack;
|
std::vector<ParsedExpressionPtr> output_queue;
|
|
bool expect_unary = true;
|
|
while (true) {
|
auto token = currentToken();
|
|
if (token.type == Lexer::Tokens::Type::PUNCTUATION && token.lexeme == "(") {
|
operator_stack.push("(");
|
consumeToken();
|
expect_unary = true;
|
} else if (token.type == Lexer::Tokens::Type::PUNCTUATION && token.lexeme == ")") {
|
consumeToken();
|
while (!operator_stack.empty() && operator_stack.top() != "(") {
|
std::string op = operator_stack.top();
|
operator_stack.pop();
|
|
if (op == "u-" || op == "u+") {
|
if (output_queue.empty()) {
|
reportError("Missing operand for unary operator");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(op, std::move(rhs)));
|
} else {
|
if (output_queue.size() < 2) {
|
reportError("Malformed expression");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
auto lhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(op, std::move(rhs), std::move(lhs)));
|
}
|
}
|
|
if (operator_stack.empty() || operator_stack.top() != "(") {
|
reportError("Mismatched parentheses");
|
}
|
operator_stack.pop(); // remove "("
|
expect_unary = false;
|
} else if (token.type == Lexer::Tokens::Type::OPERATOR_ARITHMETIC) {
|
std::string op = std::string(token.lexeme);
|
|
if (expect_unary && Lexer::isUnaryOperator(op)) {
|
op = "u" + op; // pl. u-, u+ vagy u!
|
}
|
|
while (!operator_stack.empty()) {
|
const std::string & top = operator_stack.top();
|
if ((Lexer::isLeftAssociative(op) && Lexer::getPrecedence(op) <= Lexer::getPrecedence(top)) ||
|
(!Lexer::isLeftAssociative(op) && Lexer::getPrecedence(op) < Lexer::getPrecedence(top))) {
|
operator_stack.pop();
|
|
if (top == "u-" || top == "u+") {
|
if (output_queue.empty()) {
|
reportError("Missing operand for unary operator");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(top, std::move(rhs)));
|
} else {
|
if (output_queue.size() < 2) {
|
reportError("Malformed expression");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
auto lhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(top, std::move(rhs), std::move(lhs)));
|
}
|
} else {
|
break;
|
}
|
}
|
|
operator_stack.push(op);
|
consumeToken();
|
expect_unary = true;
|
} else if (token.type == Lexer::Tokens::Type::NUMBER || token.type == Lexer::Tokens::Type::STRING_LITERAL ||
|
token.type == Lexer::Tokens::Type::KEYWORD ||
|
token.type == Lexer::Tokens::Type::VARIABLE_IDENTIFIER) {
|
if (Lexer::pushOperand(token, expected_var_type, output_queue) == false) {
|
reportError("Expected literal or variable");
|
}
|
consumeToken();
|
expect_unary = false;
|
} else {
|
break;
|
}
|
}
|
|
// Kiürítjük az operator stack-et
|
while (!operator_stack.empty()) {
|
std::string op = operator_stack.top();
|
operator_stack.pop();
|
|
if (op == "(" || op == ")") {
|
reportError("Mismatched parentheses");
|
}
|
|
if (op == "u-" || op == "u+") {
|
if (output_queue.empty()) {
|
reportError("Missing operand for unary operator");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(op, std::move(rhs)));
|
} else {
|
if (output_queue.size() < 2) {
|
reportError("Malformed expression");
|
}
|
auto rhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
auto lhs = std::move(output_queue.back());
|
output_queue.pop_back();
|
output_queue.push_back(Lexer::applyOperator(op, std::move(rhs), std::move(lhs)));
|
}
|
}
|
|
if (output_queue.size() != 1) {
|
reportError("Expression could not be parsed cleanly");
|
}
|
|
return std::move(output_queue.back());
|
}
|
|
void Parser::parseScript(const std::vector<Lexer::Tokens::Token> & tokens, std::string_view input_string,
|
const std::string & filename) {
|
tokens_ = tokens;
|
input_str_view_ = input_string;
|
current_token_index_ = 0;
|
current_filename_ = filename;
|
|
while (!isAtEnd() && currentToken().type != Lexer::Tokens::Type::END_OF_FILE) {
|
parseStatement();
|
}
|
if (!isAtEnd() && currentToken().type != Lexer::Tokens::Type::END_OF_FILE) {
|
reportError("Unexpected tokens after program end");
|
}
|
}
|
} // namespace Parser
|
