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Implement format_to_n

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This commit is contained in:
Victor Zverovich
2018-03-29 15:13:10 -10:00
parent 050f3f1f0e
commit 174087bfdb
2 changed files with 62 additions and 9 deletions
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test/format-test.cc
+8
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@@ -1505,6 +1505,14 @@ TEST(FormatTest, OutputSize) {
EXPECT_EQ(2u, fmt::count("{}", 42));
}
TEST(FormatTest, FormatToN) {
char buffer[4];
buffer[3] = 'x';
auto result = fmt::format_to_n(buffer, 3, "{}", 12345);
EXPECT_EQ(5u, result.size);
EXPECT_EQ("123x", fmt::string_view(buffer, 4));
}
#if FMT_USE_CONSTEXPR
struct test_arg_id_handler {
enum result { NONE, EMPTY, INDEX, NAME, ERROR };