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Add specialization test

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This commit is contained in:
Victor Zverovich 2019-04-19 17:02:31 -07:00
parent 946498cfbc
commit 5efb24dd2b
2 changed files with 20 additions and 3 deletions
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8
include/fmt/ostream.h
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@ -112,9 +112,11 @@ struct fallback_formatter<
// Disable conversion to int if T has an overloaded operator<< which is a free
// function (not a member of std::ostream).
template <typename T, typename Char> struct convert_to_int<T, Char, void> {
static const bool value = convert_to_int<T, Char, int>::value &&
!internal::is_streamable<T, Char>::value;
template <typename T, typename Char>
struct convert_to_int<
T, Char,
typename std::enable_if<internal::is_streamable<T, Char>::value>::type> {
static const bool value = false;
};
template <typename Char>

15
test/ostream-test.cc
View File

@ -6,6 +6,21 @@
// For the license information refer to format.h.
#define FMT_STRING_ALIAS 1
#include "fmt/format.h"
struct test {};
// Test that there is no issues with specializations when fmt/ostream.h is
// included after fmt/format.h.
namespace fmt {
template <> struct formatter<test> : formatter<int> {
template <typename FormatContext>
typename FormatContext::iterator format(const test&, FormatContext& ctx) {
return formatter<int>::format(42, ctx);
}
};
} // namespace fmt
#include "fmt/ostream.h"
#include <sstream>