Cleanup tests

include/fmt/compile.h

@@ -16,6 +16,51 @@
 FMT_BEGIN_NAMESPACE
 namespace detail {
 
+// An output iterator that counts the number of objects written to it and
+// discards them.
+class counting_iterator {
+ private:
+  size_t count_;
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  using _Unchecked_type = counting_iterator;  // Mark iterator as checked.
+
+  struct value_type {
+    template <typename T> void operator=(const T&) {}
+  };
+
+  counting_iterator() : count_(0) {}
+
+  size_t count() const { return count_; }
+
+  counting_iterator& operator++() {
+    ++count_;
+    return *this;
+  }
+  counting_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  friend counting_iterator operator+(counting_iterator it, difference_type n) {
+    it.count_ += static_cast<size_t>(n);
+    return it;
+  }
+
+  value_type operator*() const { return {}; }
+};
+
+template <typename Char, typename InputIt>
+inline counting_iterator copy_str(InputIt begin, InputIt end,
+                                  counting_iterator it) {
+  return it + (end - begin);
+}
+
 template <typename OutputIt> class truncating_iterator_base {
  protected:
   OutputIt out_;

include/fmt/format.h

@@ -33,15 +33,15 @@
 #ifndef FMT_FORMAT_H_
 #define FMT_FORMAT_H_
 
-#include <cerrno>
-#include <cmath>
+#include <cerrno>   // errno
+#include <cmath>    // std::signbit
 #include <cstddef>  // std::byte
 #include <cstdint>
 #include <cwchar>
-#include <limits>
-#include <memory>
-#include <stdexcept>
-#include <utility>  // std::swap
+#include <limits>     // std::numeric_limits
+#include <memory>     // std::uninitialized_copy
+#include <stdexcept>  // std::runtime_error
+#include <utility>    // std::swap
 
 #include "core.h"
 
@@ -430,45 +430,6 @@ constexpr Iterator base_iterator(Iterator, Iterator it) {
   return it;
 }
 
-// An output iterator that counts the number of objects written to it and
-// discards them.
-class counting_iterator {
- private:
-  size_t count_;
-
- public:
-  using iterator_category = std::output_iterator_tag;
-  using difference_type = std::ptrdiff_t;
-  using pointer = void;
-  using reference = void;
-  using _Unchecked_type = counting_iterator;  // Mark iterator as checked.
-
-  struct value_type {
-    template <typename T> void operator=(const T&) {}
-  };
-
-  counting_iterator() : count_(0) {}
-
-  size_t count() const { return count_; }
-
-  counting_iterator& operator++() {
-    ++count_;
-    return *this;
-  }
-  counting_iterator operator++(int) {
-    auto it = *this;
-    ++*this;
-    return it;
-  }
-
-  friend counting_iterator operator+(counting_iterator it, difference_type n) {
-    it.count_ += static_cast<size_t>(n);
-    return it;
-  }
-
-  value_type operator*() const { return {}; }
-};
-
 // <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
 // instead (#1998).
 template <typename OutputIt, typename Size, typename T>
@@ -524,12 +485,6 @@ buffer_appender<OutChar> copy_str(InputIt begin, InputIt end,
   return out;
 }
 
-template <typename Char, typename InputIt>
-inline counting_iterator copy_str(InputIt begin, InputIt end,
-                                  counting_iterator it) {
-  return it + (end - begin);
-}
-
 template <typename Char>
 FMT_CONSTEXPR int code_point_length(const Char* begin) {
   if (const_check(sizeof(Char) != 1)) return 1;

test/CMakeLists.txt

@@ -75,8 +75,8 @@ add_fmt_test(scan-test)
 
 if (NOT MSVC)
   # FMT_ENFORCE_COMPILE_STRING is not supported under MSVC due to compiler bugs.
-  add_fmt_test(enforce-compile-string-test)
-  target_compile_definitions(enforce-compile-string-test PRIVATE
+  add_fmt_test(enforce-checks-test)
+  target_compile_definitions(enforce-checks-test PRIVATE
                              -DFMT_ENFORCE_COMPILE_STRING)
 endif ()
 

test/compile-test.cc

@@ -12,6 +12,14 @@
 #include "fmt/chrono.h"
 #include "gmock/gmock.h"
 
+TEST(iterator_test, counting_iterator) {
+  auto it = fmt::detail::counting_iterator();
+  auto prev = it++;
+  EXPECT_EQ(prev.count(), 0);
+  EXPECT_EQ(it.count(), 1);
+  EXPECT_EQ((it + 41).count(), 42);
+}
+
 TEST(iterator_test, truncating_iterator) {
   char* p = nullptr;
   auto it = fmt::detail::truncating_iterator<char*>(p, 3);

test/core-test.cc

@@ -37,6 +37,14 @@ TEST(string_view_test, value_type) {
   static_assert(std::is_same<string_view::value_type, char>::value, "");
 }
 
+TEST(string_view_test, ctor) {
+  EXPECT_STREQ("abc", fmt::string_view("abc").data());
+  EXPECT_EQ(3u, fmt::string_view("abc").size());
+
+  EXPECT_STREQ("defg", fmt::string_view(std::string("defg")).data());
+  EXPECT_EQ(4u, fmt::string_view(std::string("defg")).size());
+}
+
 TEST(string_view_test, length) {
   // Test that string_view::size() returns string length, not buffer size.
   char str[100] = "some string";
@@ -114,6 +122,35 @@ TYPED_TEST(is_string_test, is_string) {
   EXPECT_FALSE(fmt::detail::is_string<test_ns::non_string>::value);
 }
 
+TEST(core_test, is_output_iterator) {
+  EXPECT_TRUE((fmt::detail::is_output_iterator<char*, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<const char*, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string, char>::value));
+  EXPECT_TRUE(
+      (fmt::detail::is_output_iterator<std::back_insert_iterator<std::string>,
+                                       char>::value));
+  EXPECT_TRUE(
+      (fmt::detail::is_output_iterator<std::string::iterator, char>::value));
+  EXPECT_FALSE((fmt::detail::is_output_iterator<std::string::const_iterator,
+                                                char>::value));
+}
+
+TEST(core_test, buffer_appender) {
+  // back_insert_iterator is not default-constructible before C++20, so
+  // buffer_appender can only be default-constructible when back_insert_iterator
+  // is.
+  static_assert(
+      std::is_default_constructible<
+          std::back_insert_iterator<fmt::detail::buffer<char>>>::value ==
+          std::is_default_constructible<
+              fmt::detail::buffer_appender<char>>::value,
+      "");
+
+#ifdef __cpp_lib_ranges
+  static_assert(std::output_iterator<fmt::detail::buffer_appender<char>, char>);
+#endif
+}
+
 #if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 470
 TEST(buffer_test, noncopyable) {
   EXPECT_FALSE(std::is_copy_constructible<buffer<char>>::value);
@@ -592,6 +629,14 @@ TEST(core_test, format_explicitly_convertible_to_std_string_view) {
 #  endif
 #endif
 
+struct convertible_to_long_long {
+  operator long long() const { return 1LL << 32; }
+};
+
+TEST(format_test, format_convertible_to_long_long) {
+  EXPECT_EQ("100000000", fmt::format("{:x}", convertible_to_long_long()));
+}
+
 struct disabled_rvalue_conversion {
   operator const char*() const& { return "foo"; }
   operator const char*() & { return "foo"; }

test/mock-allocator.h

@@ -8,14 +8,18 @@
 #ifndef FMT_MOCK_ALLOCATOR_H_
 #define FMT_MOCK_ALLOCATOR_H_
 
-#include "fmt/format.h"
+#include <assert.h>  // assert
+#include <stddef.h>  // size_t
+
+#include <memory>  // std::allocator_traits
+
 #include "gmock/gmock.h"
 
 template <typename T> class mock_allocator {
  public:
   mock_allocator() {}
   mock_allocator(const mock_allocator&) {}
-  typedef T value_type;
+  using value_type = T;
   MOCK_METHOD1_T(allocate, T*(size_t n));
   MOCK_METHOD2_T(deallocate, void(T* p, size_t n));
 };
@@ -30,7 +34,7 @@ template <typename Allocator> class allocator_ref {
   }
 
  public:
-  typedef typename Allocator::value_type value_type;
+  using value_type = typename Allocator::value_type;
 
   explicit allocator_ref(Allocator* alloc = nullptr) : alloc_(alloc) {}