Flee

Parsing/CustomTokenPatterns.cs

@@ -0,0 +1,49 @@
+using Flee.PublicTypes;
+
+namespace Flee.Parsing
+{
+    internal abstract class CustomTokenPattern : TokenPattern
+    {
+        protected CustomTokenPattern(int id, string name, PatternType type, string pattern) : base(id, name, type, pattern)
+        {
+        }
+
+        public void Initialize(int id, string name, PatternType type, string pattern, ExpressionContext context)
+        {
+            this.ComputeToken(id, name, type, pattern, context);
+        }
+
+        protected abstract void ComputeToken(int id, string name, PatternType type, string pattern, ExpressionContext context);
+    }
+
+    internal class RealPattern : CustomTokenPattern
+    {
+        public RealPattern(int id, string name, PatternType type, string pattern) : base(id, name, type, pattern)
+        {
+        }
+
+        protected override void ComputeToken(int id, string name, PatternType type, string pattern, ExpressionContext context)
+        {
+            ExpressionParserOptions options = context.ParserOptions;
+
+            char digitsBeforePattern = (options.RequireDigitsBeforeDecimalPoint ? '+' : '*');
+
+            pattern = string.Format(pattern, digitsBeforePattern, options.DecimalSeparator);
+
+            this.SetData(id, name, type, pattern);
+        }
+    }
+
+    internal class ArgumentSeparatorPattern : CustomTokenPattern
+    {
+        public ArgumentSeparatorPattern(int id, string name, PatternType type, string pattern) : base(id, name, type, pattern)
+        {
+        }
+
+        protected override void ComputeToken(int id, string name, PatternType type, string pattern, ExpressionContext context)
+        {
+            ExpressionParserOptions options = context.ParserOptions;
+            this.SetData(id, name, type, options.FunctionArgumentSeparator.ToString());
+        }
+    }
+}