using System;

namespace NTERA.Interpreter
{
    [Flags]
    public enum LexerType
    {
        Real = 1,
        String = 2,
        Both = Real | String
    }

    [AttributeUsage(AttributeTargets.Field)]
    public class LexerCharacterAttribute : Attribute
    {
        public char Character { get; }
        public LexerType LexerContext { get; }

        public LexerCharacterAttribute(char character, LexerType lexerContext = LexerType.Both)
        {
            Character = character;

            LexerContext = lexerContext;
        }
    }

    [AttributeUsage(AttributeTargets.Field)]
    public class LexerKeywordAttribute : Attribute
    {
        public string Keyword { get; }
        public bool IsLineKeyword { get; }

        public LexerKeywordAttribute(string keyword, bool isLineKeyword = false)
        {
            Keyword = keyword;
            IsLineKeyword = isLineKeyword;
        }
    }

    [AttributeUsage(AttributeTargets.Method)]
    public class KeywordMethodAttribute : Attribute
    {
        public Token Token { get; }

        public KeywordMethodAttribute(Token token)
        {
            Token = token;
        }
    }

    [AttributeUsage(AttributeTargets.Method)]
    public class BuiltInFunctionAttribute : Attribute
    {
        public string Name { get; }

        public BuiltInFunctionAttribute(string name)
        {
            Name = name;
        }
    }
}