From f312737e031649334d363b1896b89ca7d5a14464 Mon Sep 17 00:00:00 2001
From: Jonah Miller <jonahm@lanl.gov>
Date: Mon, 24 Feb 2025 17:45:15 -0700
Subject: [PATCH] is_indexable_v is wrong order...

---
 singularity-eos/base/indexable_types.hpp     | 2 +-
 singularity-eos/eos/modifiers/zsplit_eos.hpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/singularity-eos/base/indexable_types.hpp b/singularity-eos/base/indexable_types.hpp
index 007a795b3a..85da44bf14 100644
--- a/singularity-eos/base/indexable_types.hpp
+++ b/singularity-eos/base/indexable_types.hpp
@@ -28,7 +28,7 @@ namespace IndexerUtils {
 // natural number index depending on what is available
 template <typename T, typename Indexer_t>
 PORTABLE_FORCEINLINE_FUNCTION auto &Get(Indexer_t &&lambda, std::size_t idx = 0) {
-  if constexpr (variadic_utils::is_indexable_v<T, Indexer_t>) {
+  if constexpr (variadic_utils::is_indexable_v<Indexer_t, T>) {
     return lambda[T()];
   } else {
     return lambda[idx];
diff --git a/singularity-eos/eos/modifiers/zsplit_eos.hpp b/singularity-eos/eos/modifiers/zsplit_eos.hpp
index f5521e94a3..49b67db517 100644
--- a/singularity-eos/eos/modifiers/zsplit_eos.hpp
+++ b/singularity-eos/eos/modifiers/zsplit_eos.hpp
@@ -279,7 +279,7 @@ class ZSplit : public EosBase<ZSplit<ztype, T>> {
       PORTABLE_THROW_OR_ABORT(
           "StellarCollapse: lambda must contain Ye and 1 space for caching.\n");
     }
-    if constexpr (is_indexable_v<IndexableTypes::MeanIonizationState, Indexer_t>) {
+    if constexpr (is_indexable_v<Indexer_t, IndexableTypes::MeanIonizationState>) {
       return std::max(0.0, lambda[IndexableTypes::MeanIonizationState()]);
     } else {
       return std::max(0.0, lambda[t_.nlambda()]);