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Merge bitcoin/bitcoin#33192: refactor: unify container presence checks

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d9319b06cf refactor: unify container presence checks - non-trivial counts (Lőrinc)
039307554e refactor: unify container presence checks - trivial counts (Lőrinc)
8bb9219b63 refactor: unify container presence checks - find (Lőrinc)

Pull request description:

  ### Summary
  Instead of counting occurrences in sets and maps, the C++20 `::contains` method expresses the intent unambiguously and can return early on first encounter.

  ### Context
  Applied clang‑tidy's [readability‑container‑contains](https://clang.llvm.org/extra/clang-tidy/checks/readability/container-contains.html) check, though many cases required manual changes since tidy couldn't fix them automatically.

  ### Changes
  The changes made here were:

  | From                   | To               |
  |------------------------|------------------|
  | `m.find(k) == m.end()` | `!m.contains(k)` |
  | `m.find(k) != m.end()` | `m.contains(k)`  |
  | `m.count(k)`           | `m.contains(k)`  |
  | `!m.count(k)`          | `!m.contains(k)` |
  | `m.count(k) == 0`      | `!m.contains(k)` |
  | `m.count(k) != 1`      | `!m.contains(k)` |
  | `m.count(k) == 1`      | `m.contains(k)`  |
  | `m.count(k) < 1`       | `!m.contains(k)`  |
  | `m.count(k) > 0`       | `m.contains(k)`  |
  | `m.count(k) != 0`      | `m.contains(k)`  |

  > Note that `== 1`/`!= 1`/`< 1` only apply to simple [maps](https://en.cppreference.com/w/cpp/container/map/contains)/[sets](https://en.cppreference.com/w/cpp/container/set/contains) and had to be changed manually.

  There are many other cases that could have been changed, but we've reverted most of those to reduce conflict with other open PRs.

  -----

  <details>
  <summary>clang-tidy command on Mac</summary>

  ```bash
  rm -rfd build && \
  cmake -B build \
    -DCMAKE_C_COMPILER="$(brew --prefix llvm)/bin/clang" \
    -DCMAKE_CXX_COMPILER="$(brew --prefix llvm)/bin/clang++" \
    -DCMAKE_OSX_SYSROOT="$(xcrun --show-sdk-path)" \
    -DCMAKE_C_FLAGS="-target arm64-apple-macos11" \
    -DCMAKE_CXX_FLAGS="-target arm64-apple-macos11" \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DBUILD_BENCH=ON -DBUILD_FUZZ_BINARY=ON -DBUILD_FOR_FUZZING=ON

   "$(brew --prefix llvm)/bin/run-clang-tidy" -quiet -p build -j$(nproc) -checks='-*,readability-container-contains' | grep -v 'clang-tidy'
  ```

  </details>

  Note: this is a take 2 of https://github.com/bitcoin/bitcoin/pull/33094 with fewer contentious changes.

ACKs for top commit:
  optout21:
    reACK d9319b06cf
  sedited:
    ACK d9319b06cf
  janb84:
    re ACK d9319b06cf
  pablomartin4btc:
    re-ACK d9319b06cf
  ryanofsky:
    Code review ACK d9319b06cf. I manually reviewed the full change, and it seems there are a lot of positive comments about this and no more very significant conflicts, so I will merge it shortly.

Tree-SHA512: e4415221676cfb88413ccc446e5f4369df7a55b6642347277667b973f515c3c8ee5bfa9ee0022479c8de945c89fbc9ff61bd8ba086e70f30298cbc1762610fe1
This commit is contained in:
Ryan Ofsky
2025-12-17 16:17:09 -05:00
parent fe0e31f1ef d9319b06cf
commit ab513103df
63 changed files with 184 additions and 184 deletions
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12
src/validation.cpp
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@@ -1748,9 +1748,9 @@ PackageMempoolAcceptResult MemPoolAccept::AcceptPackage(const Package& package,
for (const auto& tx : package) {
const auto& wtxid = tx->GetWitnessHash();
if (multi_submission_result.m_tx_results.count(wtxid) > 0) {
if (multi_submission_result.m_tx_results.contains(wtxid)) {
// We shouldn't have re-submitted if the tx result was already in results_final.
Assume(results_final.count(wtxid) == 0);
Assume(!results_final.contains(wtxid));
// If it was submitted, check to see if the tx is still in the mempool. It could have
// been evicted due to LimitMempoolSize() above.
const auto& txresult = multi_submission_result.m_tx_results.at(wtxid);
@@ -1766,7 +1766,7 @@ PackageMempoolAcceptResult MemPoolAccept::AcceptPackage(const Package& package,
// Already-in-mempool transaction. Check to see if it's still there, as it could have
// been evicted when LimitMempoolSize() was called.
Assume(it->second.m_result_type != MempoolAcceptResult::ResultType::INVALID);
Assume(individual_results_nonfinal.count(wtxid) == 0);
Assume(!individual_results_nonfinal.contains(wtxid));
// Query by txid to include the same-txid-different-witness ones.
if (!m_pool.exists(tx->GetHash())) {
package_state_final.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
@@ -4874,14 +4874,14 @@ bool Chainstate::ReplayBlocks()
const CBlockIndex* pindexNew; // New tip during the interrupted flush.
const CBlockIndex* pindexFork = nullptr; // Latest block common to both the old and the new tip.
if (m_blockman.m_block_index.count(hashHeads[0]) == 0) {
if (!m_blockman.m_block_index.contains(hashHeads[0])) {
LogError("ReplayBlocks(): reorganization to unknown block requested\n");
return false;
}
pindexNew = &(m_blockman.m_block_index[hashHeads[0]]);
if (!hashHeads[1].IsNull()) { // The old tip is allowed to be 0, indicating it's the first flush.
if (m_blockman.m_block_index.count(hashHeads[1]) == 0) {
if (!m_blockman.m_block_index.contains(hashHeads[1])) {
LogError("ReplayBlocks(): reorganization from unknown block requested\n");
return false;
}
@@ -5013,7 +5013,7 @@ bool Chainstate::LoadGenesisBlock()
// m_blockman.m_block_index. Note that we can't use m_chain here, since it is
// set based on the coins db, not the block index db, which is the only
// thing loaded at this point.
if (m_blockman.m_block_index.count(params.GenesisBlock().GetHash()))
if (m_blockman.m_block_index.contains(params.GenesisBlock().GetHash()))
return true;
try {