From cea3e47938322b97c318dea38dc0d649e196dc1b Mon Sep 17 00:00:00 2001
From: Ben Culkin <scorpress@gmail.com>
Date: Tue, 16 Aug 2022 23:03:27 -0400
Subject: Refactor to add backtracking support

This probably doesn't help w/ error messages, but it enables some cool
ideas where syntax can be reused in cases where it would otherwise be
invalid
---
 .../src/main/java/bjc/pratt/commands/impls/GroupingCommand.java  | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'JPratt/src/main/java/bjc/pratt/commands/impls/GroupingCommand.java')

diff --git a/JPratt/src/main/java/bjc/pratt/commands/impls/GroupingCommand.java b/JPratt/src/main/java/bjc/pratt/commands/impls/GroupingCommand.java
index 1515359..44aa2c1 100644
--- a/JPratt/src/main/java/bjc/pratt/commands/impls/GroupingCommand.java
+++ b/JPratt/src/main/java/bjc/pratt/commands/impls/GroupingCommand.java
@@ -3,6 +3,7 @@ package bjc.pratt.commands.impls;
 import bjc.pratt.ParserContext;
 import bjc.pratt.blocks.ParseBlock;
 import bjc.pratt.commands.AbstractInitialCommand;
+import bjc.pratt.commands.CommandResult;
 import bjc.pratt.tokens.Token;
 import bjc.data.Tree;
 import bjc.data.SimpleTree;
@@ -43,10 +44,10 @@ public class GroupingCommand<K, V, C> extends AbstractInitialCommand<K, V, C> {
 	}
 
 	@Override
-	protected Tree<Token<K, V>> intNullDenotation(final Token<K, V> operator, final ParserContext<K, V, C> ctx)
+	protected CommandResult<K, V> intNullDenotation(final Token<K, V> operator, final ParserContext<K, V, C> ctx)
 			throws ParserException {
-		final Tree<Token<K, V>> opr = innerBlock.parse(ctx);
-
-		return new SimpleTree<>(mark, opr);
+		final CommandResult<K,V> resOpr = innerBlock.parse(ctx);
+		Tree<Token<K, V>> opr = resOpr.success();
+		return CommandResult.success(new SimpleTree<>(mark, opr));
 	}
 }
\ No newline at end of file
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