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Provide reasonable default definition for is_contiguous (#4770)

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Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
This commit is contained in:
Vladislav Shchapov
2026-05-21 19:19:19 +05:00
committed by GitHub
parent 2f18a88e68
commit a30cf7d1ad
2 changed files with 24 additions and 1 deletions
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test/base-test.cc
+10
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@@ -21,8 +21,10 @@
#include <functional> // std::equal_to
#include <iterator> // std::back_insert_iterator, std::distance
#include <limits> // std::numeric_limits
#include <list> // std::list
#include <string> // std::string
#include <type_traits> // std::is_same
#include <vector> // std::vector
#include "gmock/gmock.h"
@@ -876,6 +878,14 @@ FMT_BEGIN_NAMESPACE
template <> struct is_contiguous<custom_container> : std::true_type {};
FMT_END_NAMESPACE
TEST(base_test, is_contiguous) {
EXPECT_TRUE((fmt::is_contiguous<custom_container>::value));
EXPECT_TRUE((fmt::is_contiguous<std::string>::value));
EXPECT_TRUE((fmt::is_contiguous<fmt::string_view>::value));
EXPECT_TRUE((fmt::is_contiguous<std::vector<char>>::value));
EXPECT_FALSE((fmt::is_contiguous<std::list<char>>::value));
}
TEST(base_test, format_to_custom_container) {
auto c = custom_container();
fmt::format_to(std::back_inserter(c), "");