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
---
 .../java/bjc/pratt/commands/impls/PostCircumfixCommand.java   | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

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

diff --git a/JPratt/src/main/java/bjc/pratt/commands/impls/PostCircumfixCommand.java b/JPratt/src/main/java/bjc/pratt/commands/impls/PostCircumfixCommand.java
index 78ac1ef..ec2c8fb 100644
--- a/JPratt/src/main/java/bjc/pratt/commands/impls/PostCircumfixCommand.java
+++ b/JPratt/src/main/java/bjc/pratt/commands/impls/PostCircumfixCommand.java
@@ -3,6 +3,8 @@ package bjc.pratt.commands.impls;
 import bjc.pratt.ParserContext;
 import bjc.pratt.blocks.ParseBlock;
 import bjc.pratt.commands.BinaryPostCommand;
+import bjc.pratt.commands.CommandResult;
+import bjc.pratt.commands.CommandResult.Status;
 import bjc.pratt.tokens.Token;
 import bjc.data.Tree;
 import bjc.data.SimpleTree;
@@ -50,10 +52,11 @@ public class PostCircumfixCommand<K, V, C> extends BinaryPostCommand<K, V, C> {
 	}
 
 	@Override
-	public Tree<Token<K, V>> denote(final Tree<Token<K, V>> operand, final Token<K, V> operator,
+	public CommandResult<K, V> denote(final Tree<Token<K, V>> operand, final Token<K, V> operator,
 			final ParserContext<K, V, C> ctx) throws ParserException {
-		final Tree<Token<K, V>> inside = innerBlock.parse(ctx);
-
-		return new SimpleTree<>(mark, operand, inside);
+		final CommandResult<K,V> insideRes = innerBlock.parse(ctx);
+		if (insideRes.status != Status.SUCCESS) return insideRes;
+		Tree<Token<K, V>> inside = insideRes.success();
+		return CommandResult.success(new SimpleTree<>(mark, operand, inside));
 	}
 }
\ No newline at end of file
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