From 4977cd98ea4a3f8f491c18ae84fe6f051482bd12 Mon Sep 17 00:00:00 2001
From: Andreas Buhr <andreas@andreasbuhr.de>
Date: Wed, 10 Apr 2024 18:24:50 +0200
Subject: [PATCH] Improve implementation of
 ParserATNSimulator::getConflictingAlts()

PredictionModeClass::getAlts(configs)
yields the same result as
PredictionModeClass::getAlts(
  PredictionModeClass::getConflictingAltSubsets(configs)
)
Both return a BitSet with bits set for all alts which occur in configs.

Signed-off-by: Andreas Buhr <andreas@andreasbuhr.de>
---
 runtime/Cpp/runtime/src/atn/ParserATNSimulator.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/runtime/Cpp/runtime/src/atn/ParserATNSimulator.cpp b/runtime/Cpp/runtime/src/atn/ParserATNSimulator.cpp
index 3a1537587c..2817c30323 100755
--- a/runtime/Cpp/runtime/src/atn/ParserATNSimulator.cpp
+++ b/runtime/Cpp/runtime/src/atn/ParserATNSimulator.cpp
@@ -1201,8 +1201,7 @@ Ref<ATNConfig> ParserATNSimulator::ruleTransition(Ref<ATNConfig> const& config,
 }
 
 BitSet ParserATNSimulator::getConflictingAlts(ATNConfigSet *configs) {
-  std::vector<BitSet> altsets = PredictionModeClass::getConflictingAltSubsets(configs);
-  return PredictionModeClass::getAlts(altsets);
+  return PredictionModeClass::getAlts(configs);
 }
 
 BitSet ParserATNSimulator::getConflictingAltsOrUniqueAlt(ATNConfigSet *configs) {