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Merge #18410: Docs: Improve commenting for coins.cpp|h

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21fa0a44ab [docs] use consistent naming for possible_overwrite (John Newbery)
2685c214cc [tests] small whitespace fixup (John Newbery)
e9936966c0 scripted-diff: Rename PRUNED to SPENT in coins tests (John Newbery)
c205979031 [docs] Improve commenting in coins.cpp|h (John Newbery)

Pull request description:

  - Add full commenting for spentness / DIRTYness / FRESHness and which combinations are valid
  - Remove the 'pruned' terminology, which doesn't make sense since per-txout chainstate db was merged (#10195).
  - Rename `potential_overwrite` to `possible_overwrite` to standardize terminology (there were previously examples of both, which made searching the codebase difficult).
  - Make other minor improvements to the comments

ACKs for top commit:
  jonatack:
    Re-ACK 21fa0a4 per `git diff 98bee55 21fa0a4` the only change since my previous review is the following code commenting diff in `src/coins.cpp::L177-179`;  rebuilt/ran unit tests anyway as a sanity check on the unit test changes.

Tree-SHA512: 391e01588ef5edb417250080cec17361f982c4454bc5f8c6d78bbd528c68a2bb94373297760691295c24660ce1022ad3ef7599762f736c8eed772ce096d38c3d
This commit is contained in:
Wladimir J. van der Laan
2020-04-22 14:23:10 +02:00
parent acb4fa0741 21fa0a44ab
commit 9e8e813df5
4 changed files with 159 additions and 121 deletions
Download Patch File Download Diff File Expand all files Collapse all files

170
src/test/coins_tests.cpp
View File

@@ -549,7 +549,7 @@ BOOST_AUTO_TEST_CASE(ccoins_serialization)
}
const static COutPoint OUTPOINT;
const static CAmount PRUNED = -1;
const static CAmount SPENT = -1;
const static CAmount ABSENT = -2;
const static CAmount FAIL = -3;
const static CAmount VALUE1 = 100;
@@ -568,7 +568,7 @@ static void SetCoinsValue(CAmount value, Coin& coin)
assert(value != ABSENT);
coin.Clear();
assert(coin.IsSpent());
if (value != PRUNED) {
if (value != SPENT) {
coin.out.nValue = value;
coin.nHeight = 1;
assert(!coin.IsSpent());
@@ -598,7 +598,7 @@ void GetCoinsMapEntry(const CCoinsMap& map, CAmount& value, char& flags)
flags = NO_ENTRY;
} else {
if (it->second.coin.IsSpent()) {
value = PRUNED;
value = SPENT;
} else {
value = it->second.coin.out.nValue;
}
@@ -651,28 +651,28 @@ BOOST_AUTO_TEST_CASE(ccoins_access)
* Value Value Value Flags Flags
*/
CheckAccessCoin(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckAccessCoin(ABSENT, PRUNED, PRUNED, 0 , 0 );
CheckAccessCoin(ABSENT, PRUNED, PRUNED, FRESH , FRESH );
CheckAccessCoin(ABSENT, PRUNED, PRUNED, DIRTY , DIRTY );
CheckAccessCoin(ABSENT, PRUNED, PRUNED, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(ABSENT, SPENT , SPENT , 0 , 0 );
CheckAccessCoin(ABSENT, SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(ABSENT, SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(ABSENT, SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(ABSENT, VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(PRUNED, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckAccessCoin(PRUNED, PRUNED, PRUNED, 0 , 0 );
CheckAccessCoin(PRUNED, PRUNED, PRUNED, FRESH , FRESH );
CheckAccessCoin(PRUNED, PRUNED, PRUNED, DIRTY , DIRTY );
CheckAccessCoin(PRUNED, PRUNED, PRUNED, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(PRUNED, VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(PRUNED, VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(PRUNED, VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(PRUNED, VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(SPENT , ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckAccessCoin(SPENT , SPENT , SPENT , 0 , 0 );
CheckAccessCoin(SPENT , SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(SPENT , SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(SPENT , SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(SPENT , VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(SPENT , VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(SPENT , VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(VALUE1, ABSENT, VALUE1, NO_ENTRY , 0 );
CheckAccessCoin(VALUE1, PRUNED, PRUNED, 0 , 0 );
CheckAccessCoin(VALUE1, PRUNED, PRUNED, FRESH , FRESH );
CheckAccessCoin(VALUE1, PRUNED, PRUNED, DIRTY , DIRTY );
CheckAccessCoin(VALUE1, PRUNED, PRUNED, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(VALUE1, SPENT , SPENT , 0 , 0 );
CheckAccessCoin(VALUE1, SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(VALUE1, SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(VALUE1, SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(VALUE1, VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(VALUE1, VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(VALUE1, VALUE2, VALUE2, DIRTY , DIRTY );
@@ -702,31 +702,31 @@ BOOST_AUTO_TEST_CASE(ccoins_spend)
* Value Value Value Flags Flags
*/
CheckSpendCoins(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckSpendCoins(ABSENT, PRUNED, PRUNED, 0 , DIRTY );
CheckSpendCoins(ABSENT, PRUNED, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(ABSENT, PRUNED, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(ABSENT, PRUNED, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(ABSENT, VALUE2, PRUNED, 0 , DIRTY );
CheckSpendCoins(ABSENT, SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(ABSENT, SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(ABSENT, SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(ABSENT, SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(ABSENT, VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(ABSENT, VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(ABSENT, VALUE2, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(ABSENT, VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(ABSENT, VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(PRUNED, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckSpendCoins(PRUNED, PRUNED, PRUNED, 0 , DIRTY );
CheckSpendCoins(PRUNED, PRUNED, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(PRUNED, PRUNED, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(PRUNED, PRUNED, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(PRUNED, VALUE2, PRUNED, 0 , DIRTY );
CheckSpendCoins(PRUNED, VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(PRUNED, VALUE2, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(PRUNED, VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, ABSENT, PRUNED, NO_ENTRY , DIRTY );
CheckSpendCoins(VALUE1, PRUNED, PRUNED, 0 , DIRTY );
CheckSpendCoins(VALUE1, PRUNED, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(VALUE1, PRUNED, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(VALUE1, PRUNED, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, VALUE2, PRUNED, 0 , DIRTY );
CheckSpendCoins(SPENT , ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckSpendCoins(SPENT , SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(SPENT , SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(SPENT , VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(SPENT , VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(SPENT , VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(SPENT , VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, ABSENT, SPENT , NO_ENTRY , DIRTY );
CheckSpendCoins(VALUE1, SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(VALUE1, SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(VALUE1, SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(VALUE1, SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(VALUE1, VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(VALUE1, VALUE2, PRUNED, DIRTY , DIRTY );
CheckSpendCoins(VALUE1, VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(VALUE1, VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
}
@@ -759,7 +759,7 @@ static void CheckAddCoinBase(CAmount base_value, CAmount cache_value, CAmount mo
template <typename... Args>
static void CheckAddCoin(Args&&... args)
{
for (const CAmount base_value : {ABSENT, PRUNED, VALUE1})
for (const CAmount base_value : {ABSENT, SPENT, VALUE1})
CheckAddCoinBase(base_value, std::forward<Args>(args)...);
}
@@ -768,21 +768,21 @@ BOOST_AUTO_TEST_CASE(ccoins_add)
/* Check AddCoin behavior, requesting a new coin from a cache view,
* writing a modification to the coin, and then checking the resulting
* entry in the cache after the modification. Verify behavior with the
* with the AddCoin potential_overwrite argument set to false, and to true.
* AddCoin possible_overwrite argument set to false, and to true.
*
* Cache Write Result Cache Result potential_overwrite
* Cache Write Result Cache Result possible_overwrite
* Value Value Value Flags Flags
*/
CheckAddCoin(ABSENT, VALUE3, VALUE3, NO_ENTRY , DIRTY|FRESH, false);
CheckAddCoin(ABSENT, VALUE3, VALUE3, NO_ENTRY , DIRTY , true );
CheckAddCoin(PRUNED, VALUE3, VALUE3, 0 , DIRTY|FRESH, false);
CheckAddCoin(PRUNED, VALUE3, VALUE3, 0 , DIRTY , true );
CheckAddCoin(PRUNED, VALUE3, VALUE3, FRESH , DIRTY|FRESH, false);
CheckAddCoin(PRUNED, VALUE3, VALUE3, FRESH , DIRTY|FRESH, true );
CheckAddCoin(PRUNED, VALUE3, VALUE3, DIRTY , DIRTY , false);
CheckAddCoin(PRUNED, VALUE3, VALUE3, DIRTY , DIRTY , true );
CheckAddCoin(PRUNED, VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, false);
CheckAddCoin(PRUNED, VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, true );
CheckAddCoin(SPENT , VALUE3, VALUE3, 0 , DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, 0 , DIRTY , true );
CheckAddCoin(SPENT , VALUE3, VALUE3, FRESH , DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, FRESH , DIRTY|FRESH, true );
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY , DIRTY , false);
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY , DIRTY , true );
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, true );
CheckAddCoin(VALUE2, VALUE3, FAIL , 0 , NO_ENTRY , false);
CheckAddCoin(VALUE2, VALUE3, VALUE3, 0 , DIRTY , true );
CheckAddCoin(VALUE2, VALUE3, FAIL , FRESH , NO_ENTRY , false);
@@ -822,42 +822,42 @@ BOOST_AUTO_TEST_CASE(ccoins_write)
* Value Value Value Flags Flags Flags
*/
CheckWriteCoins(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY , NO_ENTRY );
CheckWriteCoins(ABSENT, PRUNED, PRUNED, NO_ENTRY , DIRTY , DIRTY );
CheckWriteCoins(ABSENT, PRUNED, ABSENT, NO_ENTRY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(ABSENT, SPENT , SPENT , NO_ENTRY , DIRTY , DIRTY );
CheckWriteCoins(ABSENT, SPENT , ABSENT, NO_ENTRY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(ABSENT, VALUE2, VALUE2, NO_ENTRY , DIRTY , DIRTY );
CheckWriteCoins(ABSENT, VALUE2, VALUE2, NO_ENTRY , DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(PRUNED, ABSENT, PRUNED, 0 , NO_ENTRY , 0 );
CheckWriteCoins(PRUNED, ABSENT, PRUNED, FRESH , NO_ENTRY , FRESH );
CheckWriteCoins(PRUNED, ABSENT, PRUNED, DIRTY , NO_ENTRY , DIRTY );
CheckWriteCoins(PRUNED, ABSENT, PRUNED, DIRTY|FRESH, NO_ENTRY , DIRTY|FRESH);
CheckWriteCoins(PRUNED, PRUNED, PRUNED, 0 , DIRTY , DIRTY );
CheckWriteCoins(PRUNED, PRUNED, PRUNED, 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(PRUNED, PRUNED, ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(PRUNED, PRUNED, ABSENT, FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(PRUNED, PRUNED, PRUNED, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(PRUNED, PRUNED, PRUNED, DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(PRUNED, PRUNED, ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(PRUNED, PRUNED, ABSENT, DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(PRUNED, VALUE2, VALUE2, 0 , DIRTY , DIRTY );
CheckWriteCoins(PRUNED, VALUE2, VALUE2, 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(PRUNED, VALUE2, VALUE2, FRESH , DIRTY , DIRTY|FRESH);
CheckWriteCoins(PRUNED, VALUE2, VALUE2, FRESH , DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(PRUNED, VALUE2, VALUE2, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(PRUNED, VALUE2, VALUE2, DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(PRUNED, VALUE2, VALUE2, DIRTY|FRESH, DIRTY , DIRTY|FRESH);
CheckWriteCoins(PRUNED, VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(SPENT , ABSENT, SPENT , 0 , NO_ENTRY , 0 );
CheckWriteCoins(SPENT , ABSENT, SPENT , FRESH , NO_ENTRY , FRESH );
CheckWriteCoins(SPENT , ABSENT, SPENT , DIRTY , NO_ENTRY , DIRTY );
CheckWriteCoins(SPENT , ABSENT, SPENT , DIRTY|FRESH, NO_ENTRY , DIRTY|FRESH);
CheckWriteCoins(SPENT , SPENT , SPENT , 0 , DIRTY , DIRTY );
CheckWriteCoins(SPENT , SPENT , SPENT , 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , SPENT , ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , ABSENT, FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY , DIRTY );
CheckWriteCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, 0 , DIRTY , DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, FRESH , DIRTY , DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, FRESH , DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY , DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(VALUE1, ABSENT, VALUE1, 0 , NO_ENTRY , 0 );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, FRESH , NO_ENTRY , FRESH );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, DIRTY , NO_ENTRY , DIRTY );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, DIRTY|FRESH, NO_ENTRY , DIRTY|FRESH);
CheckWriteCoins(VALUE1, PRUNED, PRUNED, 0 , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, PRUNED, FAIL , 0 , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, PRUNED, ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, PRUNED, FAIL , FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, PRUNED, PRUNED, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, PRUNED, FAIL , DIRTY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, PRUNED, ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, PRUNED, FAIL , DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , SPENT , 0 , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, SPENT , FAIL , 0 , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , FAIL , FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , SPENT , DIRTY , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, SPENT , FAIL , DIRTY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , FAIL , DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, 0 , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, VALUE2, FAIL , 0 , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, FRESH , DIRTY , DIRTY|FRESH);
@@ -871,8 +871,8 @@ BOOST_AUTO_TEST_CASE(ccoins_write)
// they would be too repetitive (the parent cache is never updated in these
// cases). The loop below covers these cases and makes sure the parent cache
// is always left unchanged.
for (const CAmount parent_value : {ABSENT, PRUNED, VALUE1})
for (const CAmount child_value : {ABSENT, PRUNED, VALUE2})
for (const CAmount parent_value : {ABSENT, SPENT, VALUE1})
for (const CAmount child_value : {ABSENT, SPENT, VALUE2})
for (const char parent_flags : parent_value == ABSENT ? ABSENT_FLAGS : FLAGS)
for (const char child_flags : child_value == ABSENT ? ABSENT_FLAGS : CLEAN_FLAGS)
CheckWriteCoins(parent_value, child_value, parent_value, parent_flags, child_flags, parent_flags);