添加对 Core 的直接引用

RhythmBaseCore/Components/RDLang/RDLang.cs

@@ -0,0 +1,47 @@
+using sly.parser;
+using sly.parser.generator;
+
+namespace RhythmBase.Components.RDLang
+{
+	/// <summary>
+	/// RDLang class provides functionality to parse and evaluate expressions written in a custom language.
+	/// </summary>
+	public static class RDLang
+	{
+		private static readonly RDVariables variables = new();
+		private static readonly RDLangParser parserInstance;
+		/// <summary>
+		/// Gets the collection of variables used in the custom language.
+		/// </summary>
+		/// <value>
+		/// The collection of variables.
+		/// </value>
+		public static RDVariables Variables { get => variables; }
+		/// <summary>
+		/// Lazy-initialized parser for the custom language expressions.
+		/// </summary>
+		internal static Lazy<Parser<RDExpressionToken, float>> Parser = new(() =>
+		{
+			var builder = new ParserBuilder<RDExpressionToken, float>();
+			var build = builder.BuildParser(parserInstance, ParserType.LL_RECURSIVE_DESCENT, "expression");
+			var parser = build.Result;
+			return parser;
+		});
+		static RDLang()
+		{
+			parserInstance = new RDLangParser() { Variables = variables };
+		}
+		/// <summary>
+		/// Tries to parse the given code string into a float result.
+		/// </summary>
+		/// <param name="code">The code string to parse.</param>
+		/// <param name="result">The parsed float result if the parsing is successful.</param>
+		/// <returns>True if parsing is successful; otherwise, false.</returns>
+		public static bool TryRun(string code, out float result)
+		{
+			var parseResult = Parser.Value.Parse(code);
+			result = parseResult.Result;
+			return parseResult.IsOk;
+		}
+	}
+}