sapphire/src/Token.cpp

#include "Token.h"
#include "StringConversion.h"
#include "FormatString/FormatString.hpp"

const std::string token_strings[] = {
    "TT_IDENTIFIER",
    "TT_NUMBER",
    "TT_FLOAT",
    "TT_KEYWORD",
    "TT_STRING",
    "TT_PLUS",
    "TT_MINUS",
    "TT_MUL",
    "TT_DIV",
    "TT_AT",
    "TT_EQUAL",
    "TT_LESSTHAN",
    "TT_GREATERTHAN",
    "TT_LPAREN",
    "TT_RPAREN",
    "TT_LBRACKET",
    "TT_RBRACKET",
    "TT_SEMICOLON",
    "TT_LOADEDSTRING",
    "TT_EOF",
    "TT_NULL",
    "TT_EQUALS",
    "TT_GTE",
    "TT_LTE",
};

Token::Token(const TokenType& type)
    : tk_type(type), loc(0,0,"")
{
}

Token::Token(const TokenType& type, const Location& location)
    : tk_type(type), loc(location)
{
}

Token::Token(const TokenType& type, const std::string& val)
    : tk_type(type), loc(0,0,""), string_value(val)
{
}

Token::Token(const TokenType& type, const int& val, const Location& location)
    : tk_type(type), int_value(val), loc(location)
{
}

Token::Token(const TokenType& type, const std::string& val, const Location& location)
    : tk_type(type), string_value(val), loc(location)
{
}

Token::Token(const TokenType& type, const float& val, const Location& location)
    : tk_type(type), float_value(val), loc(location)
{
}

Token::~Token()
{
}

Token Token::copy_with_new_type(const TokenType& type)
{
    Token result(type,loc);

    result.int_value = int_value;
    result.float_value = float_value;
    result.string_value = string_value;

    result.line_text = line_text;

    return result;
}

std::string Token::to_string() const
{
    std::string details = loc.to_parenthesized_string();
    if(tk_type == TT_Number)
    {
        return format_string("INT:%d %s",int_value,details);
    } 
    else if (tk_type == TT_Float)
    {
        return format_string("FLOAT:%f %s",float_value,details);
    }
    else if (tk_type == TT_Identifier)
    {
        return format_string("ID:%s %s",string_value,details);
    } 
    else if (tk_type == TT_Keyword)
    {
        return format_string("KEYWORD:%s %s",string_value,details);
    } 
    else if (tk_type == TT_String)
    {
        return format_string("STRING:'%s' %s",string_value,details);
    }
    switch(tk_type)
    {
        case TT_EOF:
            return "EOF " + details;
        case TT_Plus:
            return "PLUS " + details;
        case TT_Minus:
            return "MINUS " + details;
        case TT_Mul:
            return "MUL " + details;
        case TT_Div:
            return "DIV " + details;
        case TT_At:
            return "AT " + details;
        case TT_Equal:
            return "EQUAL " + details;
        case TT_LessThan:
            return "LESSTHAN " + details;
        case TT_GreaterThan:
            return "GREATERTHAN " + details;
        case TT_LParen:
            return "LPAREN " + details;
        case TT_RParen:
            return "RPAREN " + details;
        case TT_LBracket:
            return "LBRACKET " + details;
        case TT_RBracket:
            return "RBRACKET " + details;
        case TT_Semicolon:
            return "SEMICOLON " + details;
        case TT_LoadedString:
            return "LDSTRING " + details;
        case TT_Equals:
            return "EQUALS " + details;
        case TT_GTE:
            return "GTE " + details;
        case TT_LTE:
            return "LTE " + details;
    }
    return "";
}

std::string Token::line() const
{
    return this->line_text;
}

// Return a copy of the original token, but adding the contents of the line where
// the token was located.
Token Token::make_with_line(const Token& origin, const std::string& line_text)
{
    Token result(origin.tk_type,origin.loc);

    result.int_value = origin.int_value;
    result.float_value = origin.float_value;
    result.string_value = origin.string_value;

    result.line_text = line_text;

    return result;
}

void Token::operator=(const Token& other)
{
    tk_type = other.tk_type;
    int_value = other.int_value;
    string_value = other.string_value;
    float_value = other.float_value;
    line_text = other.line_text;
}

void Token::erase(Token& tk)
{
    tk.tk_type = TT_Null;
}

bool Token::match_token_types(const TokenStream& a, const TokenStream& b, int count)
{
    int size = [](int a, int b){ return a > b ? b : a; }(a.size() - count,b.size());

    for(int i = 0; i < size; ++i)
    {
        if(a[i+count].tk_type != b[i].tk_type)
        {
            return false;
        }
    }
    return true;
}