parser.hpp

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#pragma once
 
#include <stax/utils/result.hpp>
#include <string>
 
#include "ast.hpp"
#include "stax/lexer/lexer.hpp"
#include "stax/lexer/tokens.hpp"
 
namespace stax::parser {
 
DEFINE_ERROR("stax::parser", Error, Syntax, InvalidToken, ExpectedToken)
 
class Parser {
 public:
  Parser(const std::string& input);
 
  auto ParseProgram() -> result_t<Program>;
 
 private:
  auto ParseStatement() -> result_t<ast_t>;
  auto ParseLetStatement() -> result_t<ast_t>;
 
  auto NextToken() -> result_t<void>;
 
  auto ExpectPeek(token::Type tok_type) -> result_t<void>;
 
  std::string input_;
  lexer::Lexer lexer_;
 
  token::Token curr_;
  token::Token peek_;
};
 
}  // namespace stax::parser