diff options
Diffstat (limited to 'src/parser')
| -rw-r--r-- | src/parser/parser.cpp | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/src/parser/parser.cpp b/src/parser/parser.cpp deleted file mode 100644 index 97a1f27..0000000 --- a/src/parser/parser.cpp +++ /dev/null @@ -1,171 +0,0 @@ -#include <iostream> - -#include "parser/parser.hpp" - -Parser::Parser(const std::vector<Token>& tokens) : tokens_(tokens), position_(0) {} - -std::unique_ptr<Program> Parser::parse() { - auto program = std::make_unique<Program>(); - - while (peek().type != TokenType::END_OF_FILE) { - try { - auto statement = parseStatement(); - program->declarations.push_back(std::move(statement)); - - if (peek().type == TokenType::SEMICOLON) { - advance(); - } - } - - catch (const std::exception& e) { - std::cerr << " Parser error: " << e.what() << std::endl; - break; - } - } - - return program; -} - -std::unique_ptr<ASTNode> Parser::parseStatement() { - switch(peek().type) { - case TokenType::INT: - case TokenType::STRING: - { - return parseDeclaration(); - break; - } - - default: - { - error("Unexpected statement"); - return nullptr; - } - } -} - -std::unique_ptr<ASTNode> Parser::parseExpression() { - return parseAddSub(); -} - -std::unique_ptr<ASTNode> Parser::parseDeclaration() { - std::string type; - - switch(peek().type) { - case TokenType::INT: - { - type = "int"; - break; - } - - case TokenType::STRING: - { - type = "string"; - break; - } - - default: - { - error("Unexpected declaration: Invalid type"); - return nullptr; - } - } - - advance(); - std::string name = peek().value; - advance(); - if (peek().type == TokenType::ASSIGN) { - advance(); - auto value = parseExpression(); - return std::make_unique<Declaration>(type, name, std::move(value)); - } - - else if (peek().type == TokenType::SEMICOLON) { - return std::make_unique<Declaration>(type, name); - } - - else { - error("Invalid declaration"); - return nullptr; - } -} - -std::unique_ptr<ASTNode> Parser::parseAssignment() { - std::string name = peek().value; - advance(); - advance(); // consume = - auto value = parseExpression(); - return std::make_unique<Assignment>(name, std::move(value)); -} - -std::unique_ptr<ASTNode> Parser::parseAddSub() { - auto left = parseMulDiv(); - - while (peek().type == TokenType::PLUS || peek().type == TokenType::MINUS) { - std::string op = peek().value; - advance(); - auto right = parseMulDiv(); - left = std::make_unique<BinaryOp>(std::move(left), op, std::move(right)); - } - - return left; -} - -std::unique_ptr<ASTNode> Parser::parseMulDiv() { - auto left = parsePrimary(); - - while (peek().type == TokenType::MULTIPLY || peek().type == TokenType::DIVIDE) { - std::string op = peek().value; - advance(); - auto right = parsePrimary(); - left = std::make_unique<BinaryOp>(std::move(left), op, std::move(right)); - } - - return left; -} - -std::unique_ptr<ASTNode> Parser::parsePrimary() { - switch(peek().type) { - case TokenType::NUMBER: - { - double value = std::stod(peek().value); - advance(); - return std::make_unique<NumberLiteral>(value); - } - - case TokenType::IDENTIFIER: - { - std::string name = peek().value; - advance(); - return std::make_unique<Identifier>(name); - } - - case TokenType::STRING: - { - std::string value = peek().value; - advance(); - return std::make_unique<StringLiteral>(value); - } - - default: - { - error("Unknown keyword"); - return nullptr; - } - } -} - -Token Parser::advance() { - return tokens_[position_++]; -} - -Token Parser::peek() { - return tokens_[position_]; -} - -bool Parser::isAtEnd() { - return position_ >= tokens_.size(); -} - -void Parser::error(std::string s) { - -} |
