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Use '0' fill with numeric align for consistency with std::format

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This commit is contained in:
Victor Zverovich 2020-05-03 09:52:31 -07:00
parent 60d85d598c
commit a71bc9c825
2 changed files with 3 additions and 34 deletions
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7
include/fmt/format.h
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@ -1409,13 +1409,11 @@ inline OutputIt write_padded(OutputIt out,
template <typename Char> struct write_int_data {
std::size_t size;
std::size_t padding;
Char fill;
write_int_data(int num_digits, string_view prefix,
basic_format_specs<Char>& specs)
: size(prefix.size() + to_unsigned(num_digits)),
padding(0),
fill(specs.fill[0]) {
padding(0) {
if (specs.align == align::numeric) {
auto width = to_unsigned(specs.width);
if (width > size) {
@ -1425,7 +1423,6 @@ template <typename Char> struct write_int_data {
} else if (specs.precision > num_digits) {
size = prefix.size() + to_unsigned(specs.precision);
padding = to_unsigned(specs.precision - num_digits);
fill = static_cast<Char>('0');
}
if (specs.align == align::none) specs.align = align::right;
}
@ -1442,7 +1439,7 @@ OutputIt write_int(OutputIt out, int num_digits, string_view prefix,
return write_padded(out, specs, data.size, [=](iterator it) {
if (prefix.size() != 0)
it = copy_str<Char>(prefix.begin(), prefix.end(), it);
it = std::fill_n(it, data.padding, data.fill);
it = std::fill_n(it, data.padding, static_cast<Char>('0'));
return f(it);
});
}

30
test/format-test.cc
View File

@ -748,35 +748,7 @@ TEST(FormatterTest, RightAlign) {
#if FMT_NUMERIC_ALIGN
TEST(FormatterTest, NumericAlign) {
EXPECT_EQ(" 42", format("{0:=4}", 42));
EXPECT_EQ("+ 42", format("{0:=+4}", 42));
EXPECT_EQ(" 42", format("{0:=4o}", 042));
EXPECT_EQ("+ 42", format("{0:=+4o}", 042));
EXPECT_EQ(" 42", format("{0:=4x}", 0x42));
EXPECT_EQ("+ 42", format("{0:=+4x}", 0x42));
EXPECT_EQ("- 42", format("{0:=5}", -42));
EXPECT_EQ(" 42", format("{0:=5}", 42u));
EXPECT_EQ("- 42", format("{0:=5}", -42l));
EXPECT_EQ(" 42", format("{0:=5}", 42ul));
EXPECT_EQ("- 42", format("{0:=5}", -42ll));
EXPECT_EQ(" 42", format("{0:=5}", 42ull));
EXPECT_EQ("- 42.0", format("{0:=7}", -42.0));
EXPECT_EQ("- 42.0", format("{0:=7}", -42.0l));
EXPECT_THROW_MSG(format("{0:=5", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0:=5}", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0:=5}", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0:=8}", reinterpret_cast<void*>(0xface)),
format_error, "format specifier requires numeric argument");
EXPECT_EQ(" 1.0", fmt::format("{:= }", 1.0));
}
TEST(FormatToTest, FormatToNonbackInsertIteratorWithSignAndNumericAlignment) {
char buffer[16] = {};
fmt::format_to(fmt::internal::make_checked(buffer, 16), "{: =+}", 42.0);
EXPECT_STREQ("+42.0", buffer);
EXPECT_EQ("0042", format("{0:=4}", 42));
}
#endif