using System;

namespace AspClassic.Parser;

/// <summary>
/// A parse tree for a floating point literal.
/// </summary>
public sealed class FloatingPointLiteralExpression : LiteralExpression
{
	private readonly double _Literal;

	private readonly TypeCharacter _TypeCharacter;

	/// <summary>
	/// The literal value.
	/// </summary>
	public double Literal => _Literal;

	public override object Value => _Literal;

	/// <summary>
	/// The type character on the literal value.
	/// </summary>
	public TypeCharacter TypeCharacter => _TypeCharacter;

	/// <summary>
	/// Constructs a new parse tree for a floating point literal.
	/// </summary>
	/// <param name="literal">The literal value.</param>
	/// <param name="typeCharacter">The type character on the literal.</param>
	/// <param name="span">The location of the parse tree.</param>
	public FloatingPointLiteralExpression(double literal, TypeCharacter typeCharacter, Span span)
		: base(TreeType.FloatingPointLiteralExpression, span)
	{
		if (typeCharacter != 0 && typeCharacter != TypeCharacter.SingleSymbol && typeCharacter != TypeCharacter.SingleChar && typeCharacter != TypeCharacter.DoubleSymbol && typeCharacter != TypeCharacter.DoubleChar)
		{
			throw new ArgumentOutOfRangeException("typeCharacter");
		}
		_Literal = literal;
		_TypeCharacter = typeCharacter;
	}
}