Refactoring Rendering backend

Ghost.Shader/ParseUtility.cs

@@ -0,0 +1,58 @@
+namespace Ghost.Shader;
+
+internal static class ParseUtility
+{
+    public static List<Token> ParseFunctionArguments(ref TokenStreamSlice stream, TokenType tokenType)
+    {
+        var args = new List<Token>();
+        stream.Expect(TokenType.LParen);
+
+        while (!stream.Peek().type.Equals(TokenType.RParen))
+        {
+            var argToken = stream.Expect(tokenType);
+            args.Add(argToken);
+
+            if (stream.Peek().type == TokenType.Comma)
+            {
+                stream.Consume();
+            }
+            else
+            {
+                break;
+            }
+        }
+
+        stream.Expect(TokenType.RParen);
+        return args;
+    }
+
+    public static bool TrySliceLine(ref TokenStreamSlice stream, out TokenStreamSlice lineStream)
+    {
+        var length = 0;
+        if (!stream.TryPeek(out var nextToken))
+        {
+            lineStream = default;
+            return false;
+        }
+
+        while (!nextToken.Match(TokenType.Semicolon) && !nextToken.Match(TokenType.RBrace))
+        {
+            length++;
+
+            if (!stream.TryPeek(length, out nextToken))
+            {
+                break;
+            }
+        }
+
+        if (length > 0)
+        {
+            lineStream = stream.Slice(length);
+            stream.Consume(); // Consume the semicolon
+            return true;
+        }
+
+        lineStream = default;
+        return false;
+    }
+}