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AspClassic.Parser/PunctuatorToken.cs

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+using System;
+using System.Collections.Generic;
+
+namespace AspClassic.Parser;
+
+/// <summary>
+/// A punctuation token.
+/// </summary>
+public sealed class PunctuatorToken : Token
+{
+	private static Dictionary<string, TokenType> PunctuatorTable;
+
+	private static void AddPunctuator(Dictionary<string, TokenType> table, string punctuator, TokenType type)
+	{
+		table.Add(punctuator, type);
+		table.Add(Scanner.MakeFullWidth(punctuator), type);
+	}
+
+	internal static TokenType TokenTypeFromString(string s)
+	{
+		if (PunctuatorTable == null)
+		{
+			Dictionary<string, TokenType> Table = new Dictionary<string, TokenType>(StringComparer.InvariantCulture);
+			AddPunctuator(Table, "(", TokenType.LeftParenthesis);
+			AddPunctuator(Table, ")", TokenType.RightParenthesis);
+			AddPunctuator(Table, "{", TokenType.LeftCurlyBrace);
+			AddPunctuator(Table, "}", TokenType.RightCurlyBrace);
+			AddPunctuator(Table, "!", TokenType.Exclamation);
+			AddPunctuator(Table, "#", TokenType.Pound);
+			AddPunctuator(Table, ",", TokenType.Comma);
+			AddPunctuator(Table, ".", TokenType.Period);
+			AddPunctuator(Table, ":", TokenType.Colon);
+			AddPunctuator(Table, ":=", TokenType.ColonEquals);
+			AddPunctuator(Table, "&", TokenType.Ampersand);
+			AddPunctuator(Table, "&=", TokenType.AmpersandEquals);
+			AddPunctuator(Table, "*", TokenType.Star);
+			AddPunctuator(Table, "*=", TokenType.StarEquals);
+			AddPunctuator(Table, "+", TokenType.Plus);
+			AddPunctuator(Table, "+=", TokenType.PlusEquals);
+			AddPunctuator(Table, "-", TokenType.Minus);
+			AddPunctuator(Table, "-=", TokenType.MinusEquals);
+			AddPunctuator(Table, "/", TokenType.ForwardSlash);
+			AddPunctuator(Table, "/=", TokenType.ForwardSlashEquals);
+			AddPunctuator(Table, "\\", TokenType.BackwardSlash);
+			AddPunctuator(Table, "\\=", TokenType.BackwardSlashEquals);
+			AddPunctuator(Table, "^", TokenType.Caret);
+			AddPunctuator(Table, "^=", TokenType.CaretEquals);
+			AddPunctuator(Table, "<", TokenType.LessThan);
+			AddPunctuator(Table, "<=", TokenType.LessThanEquals);
+			AddPunctuator(Table, "=<", TokenType.LessThanEquals);
+			AddPunctuator(Table, "=", TokenType.Equals);
+			AddPunctuator(Table, "<>", TokenType.NotEquals);
+			AddPunctuator(Table, ">", TokenType.GreaterThan);
+			AddPunctuator(Table, ">=", TokenType.GreaterThanEquals);
+			AddPunctuator(Table, "=>", TokenType.GreaterThanEquals);
+			AddPunctuator(Table, "<<", TokenType.LessThanLessThan);
+			AddPunctuator(Table, "<<=", TokenType.LessThanLessThanEquals);
+			AddPunctuator(Table, ">>", TokenType.GreaterThanGreaterThan);
+			AddPunctuator(Table, ">>=", TokenType.GreaterThanGreaterThanEquals);
+			PunctuatorTable = Table;
+		}
+		if (!PunctuatorTable.ContainsKey(s))
+		{
+			return TokenType.None;
+		}
+		return PunctuatorTable[s];
+	}
+
+	/// <summary>
+	/// Constructs a new punctuator token.
+	/// </summary>
+	/// <param name="type">The punctuator token type.</param>
+	/// <param name="span">The location of the punctuator.</param>
+	public PunctuatorToken(TokenType type, Span span)
+		: base(type, span)
+	{
+		if (type < TokenType.LeftParenthesis || type > TokenType.GreaterThanGreaterThanEquals)
+		{
+			throw new ArgumentOutOfRangeException("type");
+		}
+	}
+}