msh_token.h

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//
// Created by andrew on 10/9/23.
//
#ifndef MYSHELL_MSH_TOKEN_H
#define MYSHELL_MSH_TOKEN_H
 
#include <string>
#include <utility>
#include <map>
#include <vector>
 
struct Token;
using tokens_t = std::vector<Token>;
 
enum class TokenType {
    EMPTY, // TODO! Properly handle <newline> <carriage return> etc.
    WORD,
    COMMAND,
    AMP,
    AND,
    PIPE,
    PIPE_AMP,
    OR,
    OUT,
    OUT_APPEND,
    IN,
    OUT_AMP,
    IN_AMP,
    AMP_OUT,
    AMP_APPEND,
    SEMICOLON,
    DQSTRING,
    SQSTRING,
    VAR_DECL,
    SUBOPEN,
    SUBCLOSE,
    COM_SUB,
};
 
extern const std::map<TokenType, int> token_flags;
 
constexpr int UNSUPPORTED = 1 << 0; 
constexpr int GLOB_EXPAND = 1 << 1; 
constexpr int VAR_EXPAND = 1 << 2; 
constexpr int WORD_LIKE = 1 << 3; 
constexpr int NO_WORD_SPLIT = 1 << 4; 
constexpr int COMMAND_SEPARATOR = 1 << 5; 
constexpr int REDIRECT = 1 << 6; 
constexpr int ASSIGNMENT_WORD = 1 << 7; 
struct Token {
    TokenType type = TokenType::EMPTY;
    std::string value;
    int flags = 0;
 
    Token() = default;
 
    explicit Token(TokenType t) : type(t) {
        flags = token_flags.at(type);
    }
 
    Token(TokenType t, std::string value) : type(t), value(std::move(value)) {
        flags = token_flags.at(type);
    }
 
    void set_type(TokenType t) {
        type = t;
        flags = token_flags.at(type);
    }
 
    [[nodiscard]] bool get_flag(int flag) const {
        return flags & flag;
    }
 
    [[maybe_unused]] void set_flag(int flag) {
        flags |= flag;
    }
 
    [[maybe_unused]] void unset_flag(int flag) {
        flags &= ~flag;
    }
};
 
#endif //MYSHELL_MSH_TOKEN_H