[libcxx-commits] [libcxx] [libc++][test] Augment ranges::{fill, fill_n, find} with missing tests (PR #121209)
via libcxx-commits
libcxx-commits at lists.llvm.org
Sat Dec 28 05:30:31 PST 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-libcxx
Author: Peng Liu (winner245)
<details>
<summary>Changes</summary>
libc++ currently has very limited test coverage for `std::ranges{fill, fill_n, find}` with `vector<bool>::iterator` optimizations. Specifically, the existing tests for `std::ranges::fill` only covers cases of 1 - 2 bytes, which is merely 1/8 to 1/4 of the `__storage_type` word size. This renders the tests insufficient to validate functionality for whole words, with or without partial words (which necessitates at least 8 bytes of data). Morover, no tests were provided for `ranges::{find, fill_n}` with `vector<bool>::iterator` optimizations. This PR fills in the gap.
---
Patch is 29.55 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/121209.diff
7 Files Affected:
- (modified) libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp (+11-42)
- (modified) libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill_n.pass.cpp (+100-106)
- (modified) libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill.pass.cpp (+21-5)
- (modified) libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill_n.pass.cpp (+17-1)
- (modified) libcxx/test/std/algorithms/alg.nonmodifying/alg.count/ranges.count.pass.cpp (+46-33)
- (modified) libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp (+16)
- (modified) libcxx/test/std/algorithms/alg.nonmodifying/alg.find/ranges.find.pass.cpp (+41-18)
``````````diff
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp
index 619dc7242a3660..4f7abae374d502 100644
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill.pass.cpp
@@ -49,50 +49,19 @@ struct Test {
TEST_CONSTEXPR_CXX20 bool test() {
types::for_each(types::forward_iterator_list<char*>(), Test<char>());
types::for_each(types::forward_iterator_list<int*>(), Test<int>());
- { // test vector<bool>::iterator optimization
- { // simple case
- std::vector<bool> in(4, false);
- std::vector<bool> expected(4, true);
- std::fill(in.begin(), in.end(), true);
- assert(in == expected);
- }
- { // partial byte in the front is not filled
- std::vector<bool> in(8, false);
- std::vector<bool> expected(8, true);
- expected[0] = false;
- expected[1] = false;
- std::fill(in.begin() + 2, in.end(), true);
- assert(in == expected);
- }
- { // partial byte in the back is not filled
- std::vector<bool> in(8, false);
- std::vector<bool> expected(8, true);
- expected[6] = false;
- expected[7] = false;
- std::fill(in.begin(), in.end() - 2, true);
- assert(in == expected);
- }
- { // partial byte in the front and back is not filled
- std::vector<bool> in(16, false);
- std::vector<bool> expected(16, true);
- expected[0] = false;
- expected[1] = false;
- expected[14] = false;
- expected[15] = false;
- std::fill(in.begin() + 2, in.end() - 2, true);
- assert(in == expected);
- }
- { // only a few bits of a byte are set
- std::vector<bool> in(8, false);
- std::vector<bool> expected(8, true);
- expected[0] = false;
- expected[1] = false;
- expected[6] = false;
- expected[7] = false;
- std::fill(in.begin() + 2, in.end() - 2, true);
- assert(in == expected);
+
+ { // Test vector<bool>::iterator optimization
+ for (std::size_t N = 8; N <= 256; N *= 2) {
+ // Test with both full and partial bytes
+ for (std::size_t offset = 0; offset <= 4; offset += 4) {
+ std::vector<bool> in(N + 2 * offset);
+ std::vector<bool> expected(N, true);
+ std::fill(in.begin() + offset, in.end() - offset, true);
+ assert(std::equal(in.begin() + offset, in.end() - offset, expected.begin()));
+ }
}
}
+
return true;
}
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill_n.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill_n.pass.cpp
index 7d6770de702bf3..be9ecf22b4c252 100644
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill_n.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/fill_n.pass.cpp
@@ -15,6 +15,7 @@
#include <algorithm>
#include <cassert>
+#include <vector>
#include "test_macros.h"
#include "test_iterators.h"
@@ -22,152 +23,145 @@
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
- const std::size_t N = 5;
- int ib[] = {0, 0, 0, 0, 0, 0}; // one bigger than N
-
- auto it = std::fill_n(std::begin(ib), N, 5);
- return it == (std::begin(ib) + N)
- && std::all_of(std::begin(ib), it, [](int a) {return a == 5; })
- && *it == 0 // don't overwrite the last value in the output array
- ;
- }
+ const std::size_t N = 5;
+ int ib[] = {0, 0, 0, 0, 0, 0}; // one bigger than N
+
+ auto it = std::fill_n(std::begin(ib), N, 5);
+ return it == (std::begin(ib) + N) && std::all_of(std::begin(ib), it, [](int a) { return a == 5; }) &&
+ *it == 0 // don't overwrite the last value in the output array
+ ;
+}
#endif
typedef UserDefinedIntegral<unsigned> UDI;
template <class Iter>
-void
-test_char()
-{
- char a[4] = {};
- Iter it = std::fill_n(Iter(a), UDI(4), char(1));
- assert(base(it) == a + 4);
- assert(a[0] == 1);
- assert(a[1] == 1);
- assert(a[2] == 1);
- assert(a[3] == 1);
+void test_char() {
+ char a[4] = {};
+ Iter it = std::fill_n(Iter(a), UDI(4), char(1));
+ assert(base(it) == a + 4);
+ assert(a[0] == 1);
+ assert(a[1] == 1);
+ assert(a[2] == 1);
+ assert(a[3] == 1);
}
template <class Iter>
-void
-test_int()
-{
- int a[4] = {};
- Iter it = std::fill_n(Iter(a), UDI(4), 1);
- assert(base(it) == a + 4);
- assert(a[0] == 1);
- assert(a[1] == 1);
- assert(a[2] == 1);
- assert(a[3] == 1);
+void test_int() {
+ int a[4] = {};
+ Iter it = std::fill_n(Iter(a), UDI(4), 1);
+ assert(base(it) == a + 4);
+ assert(a[0] == 1);
+ assert(a[1] == 1);
+ assert(a[2] == 1);
+ assert(a[3] == 1);
}
-void
-test_int_array()
-{
- int a[4] = {};
- assert(std::fill_n(a, UDI(4), static_cast<char>(1)) == a + 4);
- assert(a[0] == 1);
- assert(a[1] == 1);
- assert(a[2] == 1);
- assert(a[3] == 1);
+void test_int_array() {
+ int a[4] = {};
+ assert(std::fill_n(a, UDI(4), static_cast<char>(1)) == a + 4);
+ assert(a[0] == 1);
+ assert(a[1] == 1);
+ assert(a[2] == 1);
+ assert(a[3] == 1);
}
struct source {
- source() : i(0) { }
+ source() : i(0) {}
- operator int() const { return i++; }
- mutable int i;
+ operator int() const { return i++; }
+ mutable int i;
};
-void
-test_int_array_struct_source()
-{
- int a[4] = {};
- assert(std::fill_n(a, UDI(4), source()) == a + 4);
- assert(a[0] == 0);
- assert(a[1] == 1);
- assert(a[2] == 2);
- assert(a[3] == 3);
+void test_int_array_struct_source() {
+ int a[4] = {};
+ assert(std::fill_n(a, UDI(4), source()) == a + 4);
+ assert(a[0] == 0);
+ assert(a[1] == 1);
+ assert(a[2] == 2);
+ assert(a[3] == 3);
}
struct test1 {
- test1() : c(0) { }
- test1(char xc) : c(xc + 1) { }
- char c;
+ test1() : c(0) {}
+ test1(char xc) : c(xc + 1) {}
+ char c;
};
-void
-test_struct_array()
-{
- test1 test1a[4] = {};
- assert(std::fill_n(test1a, UDI(4), static_cast<char>(10)) == test1a + 4);
- assert(test1a[0].c == 11);
- assert(test1a[1].c == 11);
- assert(test1a[2].c == 11);
- assert(test1a[3].c == 11);
+void test_struct_array() {
+ test1 test1a[4] = {};
+ assert(std::fill_n(test1a, UDI(4), static_cast<char>(10)) == test1a + 4);
+ assert(test1a[0].c == 11);
+ assert(test1a[1].c == 11);
+ assert(test1a[2].c == 11);
+ assert(test1a[3].c == 11);
}
-class A
-{
- char a_;
+class A {
+ char a_;
+
public:
- A() {}
- explicit A(char a) : a_(a) {}
- operator unsigned char() const {return 'b';}
+ A() {}
+ explicit A(char a) : a_(a) {}
+ operator unsigned char() const { return 'b'; }
- friend bool operator==(const A& x, const A& y)
- {return x.a_ == y.a_;}
+ friend bool operator==(const A& x, const A& y) { return x.a_ == y.a_; }
};
-void
-test5()
-{
- A a[3];
- assert(std::fill_n(&a[0], UDI(3), A('a')) == a+3);
- assert(a[0] == A('a'));
- assert(a[1] == A('a'));
- assert(a[2] == A('a'));
+void test5() {
+ A a[3];
+ assert(std::fill_n(&a[0], UDI(3), A('a')) == a + 3);
+ assert(a[0] == A('a'));
+ assert(a[1] == A('a'));
+ assert(a[2] == A('a'));
}
-struct Storage
-{
- union
- {
+struct Storage {
+ union {
unsigned char a;
unsigned char b;
};
};
-void test6()
-{
+void test6() {
Storage foo[5];
std::fill_n(&foo[0], UDI(5), Storage());
}
-
-int main(int, char**)
-{
- test_char<cpp17_output_iterator<char*> >();
- test_char<forward_iterator<char*> >();
- test_char<bidirectional_iterator<char*> >();
- test_char<random_access_iterator<char*> >();
- test_char<char*>();
-
- test_int<cpp17_output_iterator<int*> >();
- test_int<forward_iterator<int*> >();
- test_int<bidirectional_iterator<int*> >();
- test_int<random_access_iterator<int*> >();
- test_int<int*>();
-
- test_int_array();
- test_int_array_struct_source();
- test_struct_array();
-
- test5();
- test6();
+int main(int, char**) {
+ test_char<cpp17_output_iterator<char*> >();
+ test_char<forward_iterator<char*> >();
+ test_char<bidirectional_iterator<char*> >();
+ test_char<random_access_iterator<char*> >();
+ test_char<char*>();
+
+ test_int<cpp17_output_iterator<int*> >();
+ test_int<forward_iterator<int*> >();
+ test_int<bidirectional_iterator<int*> >();
+ test_int<random_access_iterator<int*> >();
+ test_int<int*>();
+
+ test_int_array();
+ test_int_array_struct_source();
+ test_struct_array();
+
+ test5();
+ test6();
+
+ { // Test vector<bool>::iterator optimization
+ for (std::size_t N = 8; N <= 256; N *= 2) {
+ // Test with both full and partial bytes
+ for (std::size_t offset = 0; offset <= 4; offset += 4) {
+ std::vector<bool> in(N + 2 * offset);
+ std::vector<bool> expected(N, true);
+ std::fill_n(in.begin() + offset, N + offset, true);
+ assert(std::equal(in.begin() + offset, in.end() - offset, expected.begin()));
+ }
+ }
+ }
#if TEST_STD_VER > 17
- static_assert(test_constexpr());
+ static_assert(test_constexpr());
#endif
return 0;
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill.pass.cpp
index 5dc375e0e8dc0d..58804bb90b5241 100644
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill.pass.cpp
@@ -20,9 +20,11 @@
#include <cassert>
#include <ranges>
#include <string>
+#include <vector>
#include "almost_satisfies_types.h"
#include "test_iterators.h"
+#include "test_macros.h"
template <class Iter, class Sent = sentinel_wrapper<Iter>>
concept HasFillIt = requires(Iter iter, Sent sent) { std::ranges::fill(iter, sent, int{}); };
@@ -53,7 +55,7 @@ constexpr void test_iterators() {
}
{
int a[3];
- auto range = std::ranges::subrange(It(a), Sent(It(a + 3)));
+ auto range = std::ranges::subrange(It(a), Sent(It(a + 3)));
std::same_as<It> auto ret = std::ranges::fill(range, 1);
assert(std::all_of(a, a + 3, [](int i) { return i == 1; }));
assert(base(ret) == a + 3);
@@ -69,7 +71,7 @@ constexpr void test_iterators() {
{
std::array<int, 0> a;
auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data())));
- auto ret = std::ranges::fill(range, 1);
+ auto ret = std::ranges::fill(range, 1);
assert(base(ret) == a.data());
}
}
@@ -94,19 +96,19 @@ constexpr bool test() {
};
{
S a[5];
- std::ranges::fill(a, a + 5, S {true});
+ std::ranges::fill(a, a + 5, S{true});
assert(std::all_of(a, a + 5, [](S& s) { return s.copied; }));
}
{
S a[5];
- std::ranges::fill(a, S {true});
+ std::ranges::fill(a, S{true});
assert(std::all_of(a, a + 5, [](S& s) { return s.copied; }));
}
}
{ // check that std::ranges::dangling is returned
[[maybe_unused]] std::same_as<std::ranges::dangling> decltype(auto) ret =
- std::ranges::fill(std::array<int, 10> {}, 1);
+ std::ranges::fill(std::array<int, 10>{}, 1);
}
{ // check that std::ranges::dangling isn't returned with a borrowing range
@@ -131,6 +133,20 @@ constexpr bool test() {
}
}
+#if TEST_STD_VER >= 23
+ { // Test vector<bool>::iterator optimization
+ for (std::size_t N = 8; N <= 256; N *= 2) {
+ // Test with both full and partial bytes
+ for (std::size_t offset : {0, 4}) {
+ std::vector<bool> in(N + 2 * offset);
+ std::vector<bool> expected(N, true);
+ std::ranges::fill(std::ranges::begin(in) + offset, std::ranges::end(in) - offset, true);
+ assert(std::equal(in.begin() + offset, in.end() - offset, expected.begin()));
+ }
+ }
+ }
+#endif
+
return true;
}
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill_n.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill_n.pass.cpp
index 10ff385d474281..945960681d8e5d 100644
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill_n.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.fill/ranges.fill_n.pass.cpp
@@ -18,9 +18,11 @@
#include <cassert>
#include <ranges>
#include <string>
+#include <vector>
#include "almost_satisfies_types.h"
#include "test_iterators.h"
+#include "test_macros.h"
template <class Iter>
concept HasFillN = requires(Iter iter) { std::ranges::fill_n(iter, int{}, int{}); };
@@ -68,7 +70,7 @@ constexpr bool test() {
};
S a[5];
- std::ranges::fill_n(a, 5, S {});
+ std::ranges::fill_n(a, 5, S{});
assert(std::all_of(a, a + 5, [](S& s) { return s.copied; }));
}
@@ -79,6 +81,20 @@ constexpr bool test() {
assert(std::all_of(a.begin(), a.end(), [](auto& s) { return s == "long long string so no SSO"; }));
}
+#if TEST_STD_VER >= 23
+ { // Test vector<bool>::iterator optimization
+ for (std::size_t N = 8; N <= 256; N *= 2) {
+ // Test with both full and partial bytes
+ for (std::size_t offset : {0, 4}) {
+ std::vector<bool> in(N + 2 * offset);
+ std::vector<bool> expected(N, true);
+ std::ranges::fill_n(std::ranges::begin(in) + offset, N, true);
+ assert(std::equal(in.begin() + offset, in.end() - offset, expected.begin()));
+ }
+ }
+ }
+#endif
+
return true;
}
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.count/ranges.count.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.count/ranges.count.pass.cpp
index 6030bed47ec6a7..877b6fa34e5bcb 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.count/ranges.count.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.count/ranges.count.pass.cpp
@@ -67,13 +67,13 @@ constexpr void test_iterators() {
{
// simple test
{
- int a[] = {1, 2, 3, 4};
+ int a[] = {1, 2, 3, 4};
std::same_as<std::ptrdiff_t> auto ret = std::ranges::count(It(a), Sent(It(a + 4)), 3);
assert(ret == 1);
}
{
- int a[] = {1, 2, 3, 4};
- auto range = std::ranges::subrange(It(a), Sent(It(a + 4)));
+ int a[] = {1, 2, 3, 4};
+ auto range = std::ranges::subrange(It(a), Sent(It(a + 4)));
std::same_as<std::ptrdiff_t> auto ret = std::ranges::count(range, 3);
assert(ret == 1);
}
@@ -83,13 +83,13 @@ constexpr void test_iterators() {
// check that an empty range works
{
std::array<int, 0> a = {};
- auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 1);
+ auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 1);
assert(ret == 0);
}
{
std::array<int, 0> a = {};
- auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
- auto ret = std::ranges::count(range, 1);
+ auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
+ auto ret = std::ranges::count(range, 1);
assert(ret == 0);
}
}
@@ -98,13 +98,13 @@ constexpr void test_iterators() {
// check that a range with a single element works
{
std::array a = {2};
- auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 2);
+ auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 2);
assert(ret == 1);
}
{
std::array a = {2};
- auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
- auto ret = std::ranges::count(range, 2);
+ auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
+ auto ret = std::ranges::count(range, 2);
assert(ret == 1);
}
}
@@ -113,13 +113,13 @@ constexpr void test_iterators() {
// check that 0 is returned with no match
{
std::array a = {1, 1, 1};
- auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 0);
+ auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 0);
assert(ret == 0);
}
{
std::array a = {1, 1, 1};
- auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
- auto ret = std::ranges::count(range, 0);
+ auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
+ auto ret = std::ranges::count(range, 0);
assert(ret == 0);
}
}
@@ -128,13 +128,13 @@ constexpr void test_iterators() {
// check that more than one element is counted
{
std::array a = {3, 3, 4, 3, 3};
- auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 3);
+ auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 3);
assert(ret == 4);
}
{
std::array a = {3, 3, 4, 3, 3};
- auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
- auto ret = std::ranges::count(range, 3);
+ auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
+ auto ret = std::ranges::count(range, 3);
assert(ret == 4);
}
}
@@ -143,13 +143,13 @@ constexpr void test_iterators() {
// check that all elements are counted
{
std::array a = {5, 5, 5, 5};
- auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 5);
+ auto ret = std::ranges::count(It(a.data()), Sent(It(a.data() + a.size())), 5);
assert(ret == 4);
}
{
std::array a = {5, 5, 5, 5};
- auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
- auto ret = std::ranges::count(range, 5);
+ auto range = std::ranges::subrange(It(a.data()), Sent(It(a.data() + a.size())));
+ auto ret = std::ranges::count(range, 5);
assert(ret == 4);
}
}
@@ -167,12 +167,12 @@ constexpr bool test() {
{
// check that projections are used properly and that they are called with the iterator directly
{
- int a[] = {1, 2, 3, 4};
+ int a[] = {1, 2, 3, 4};
auto ret = std::ranges::count(a, a + 4, a + 3, [](int& i) { return &i; });
assert(ret == 1);
}
{
- int a[] = {1, 2, 3, 4};
+ int a[] = {1, 2, 3, 4};
auto ret = std::ranges::count(a, a + 3, [](int& i) { return &i; });
assert(ret == 1);
}
@@ -180,8 +180,10 @@ constexpr bool test() {
{
// check that std::invoke is used
- struct S { int i; };
- S a[] = { S{1}, S{3}, S{2} };
+ struct S {
+ int i;
+ };
+ S a[] = {S{1}, S{3}, S{2}};
std::same_as<std::ptrdiff_t> auto ret = std::ranges::count(a, 4, &S::i);
assert(ret == 0);
}
@@ -189,16 +191,22 @@ constexpr bool test() {
{
// count invocations of the projection
{
- int a[] = {1, 2, 3, 4};
+ int a[] = {1, 2, 3, 4};
int projection_count = 0;
- auto ret = std::ranges::count(a, a + 4, 2, [&](int i) { ++projection_count; return i; });
+ auto ret = std::ranges::count(a, a + 4, 2, [&](int i) {
+ ++projection_count;
+ return i;
+ });
assert(ret == 1);
assert(projection_count == 4);
}
{
- int a[] = {1, 2, 3, 4};
+ int a[] = {1, 2, 3, 4};
int projection_count = 0;
- auto ret = std::ranges::count(a, 2, [&](int i) { ++projection_count; return i; });
+ auto ret = std::ranges::count(a, 2, [&](int i) {
+ ++projection_count;
+ return i;
+ });
assert(ret == 1);
assert(projection_count == 4);
}
@@ -208,7 +216,7 @@ constexpr bool test() {
// check that an immobile type works
struct NonMovable {
NonMovable(const NonMovable&) = delete;
- NonMovable(NonMovable&&) = delete;
+ NonMovable(NonMovable&&) = delete;
constexpr NonMovable(int i_) : i(i_) {}
int i;
@@ -216,12 +224,12 @@ constexpr bool test() {
};
{
NonMovable a[] = {9, 8, 4, 3};
- auto ret = std::ranges::count(a, a + 4, NonMovable(8));
+ auto ret ...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/121209
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