refactor: use recommended type hiding on multi_index types

Recommended by boost docs:
https://www.boost.org/doc/libs/1_85_0/libs/multi_index/doc/compiler_specifics.html#type_hiding

This significantly reduces the size of the symbol name lengths that end up in
the binaries as well as in compiler warnings/errors. Otherwise there should be
no functional change.

Example before:
0000000000000000 W unsigned long boost::multi_index::detail::hashed_index<mempoolentry_txid, SaltedTxidHasher, std::equal_to<uint256>, boost::multi_index::detail::nth_layer<1, CTxMemPoolEntry, boost::multi_index::indexed_by<boost::multi_index::hashed_unique<mempoolentry_txid, SaltedTxidHasher, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::tag<index_by_wtxid, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, mempoolentry_wtxid, SaltedTxidHasher, mpl_::na>, boost::multi_index::ordered_non_unique<boost::multi_index::tag<descendant_score, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::identity<CTxMemPoolEntry>, CompareTxMemPoolEntryByDescendantScore>, boost::multi_index::ordered_non_unique<boost::multi_index::tag<entry_time, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::identity<CTxMemPoolEntry>, CompareTxMemPoolEntryByEntryTime>, boost::multi_index::ordered_non_unique<boost::multi_index::tag<ancestor_score, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, boost::multi_index::identity<CTxMemPoolEntry>, CompareTxMemPoolEntryByAncestorFee>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<CTxMemPoolEntry> >, boost::mpl::vector0<mpl_::na>, boost::multi_index::detail::hashed_unique_tag>::count<uint256, SaltedTxidHasher, std::equal_to<uint256> >(uint256 const&, SaltedTxidHasher const&, std::equal_to<uint256> const&, mpl_::bool_<false>) const

After:
0000000000000000 W unsigned long boost::multi_index::detail::hashed_index<mempoolentry_txid, SaltedTxidHasher, std::equal_to<uint256>, boost::multi_index::detail::nth_layer<1, CTxMemPoolEntry, CTxMemPool::CTxMemPoolEntry_Indicies, std::allocator<CTxMemPoolEntry> >, boost::mpl::vector0<mpl_::na>, boost::multi_index::detail::hashed_unique_tag>::count<uint256, SaltedTxidHasher, std::equal_to<uint256> >(uint256 const&, SaltedTxidHasher const&, std::equal_to<uint256> const&, mpl_::bool_<false>) const

1 files changed, 17 insertions, 13 deletions

diff --git a/src/node/miner.h b/src/node/miner.h
index 06a917228d..445ccc13da 100644
--- a/src/node/miner.h
+++ b/src/node/miner.h
@@ -96,21 +96,25 @@ struct CompareTxIterByAncestorCount {
     }
 };
 
+
+struct CTxMemPoolModifiedEntry_Indices final : boost::multi_index::indexed_by<
+    boost::multi_index::ordered_unique<
+        modifiedentry_iter,
+        CompareCTxMemPoolIter
+    >,
+    // sorted by modified ancestor fee rate
+    boost::multi_index::ordered_non_unique<
+        // Reuse same tag from CTxMemPool's similar index
+        boost::multi_index::tag<ancestor_score>,
+        boost::multi_index::identity<CTxMemPoolModifiedEntry>,
+        CompareTxMemPoolEntryByAncestorFee
+    >
+>
+{};
+
 typedef boost::multi_index_container<
     CTxMemPoolModifiedEntry,
-    boost::multi_index::indexed_by<
-        boost::multi_index::ordered_unique<
-            modifiedentry_iter,
-            CompareCTxMemPoolIter
-        >,
-        // sorted by modified ancestor fee rate
-        boost::multi_index::ordered_non_unique<
-            // Reuse same tag from CTxMemPool's similar index
-            boost::multi_index::tag<ancestor_score>,
-            boost::multi_index::identity<CTxMemPoolModifiedEntry>,
-            CompareTxMemPoolEntryByAncestorFee
-        >
-    >
+    CTxMemPoolModifiedEntry_Indices
 > indexed_modified_transaction_set;
 
 typedef indexed_modified_transaction_set::nth_index<0>::type::iterator modtxiter;