51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
/*
|
|
Custom argument formatter tests
|
|
|
|
Copyright (c) 2016, Victor Zverovich
|
|
All rights reserved.
|
|
|
|
For the license information refer to format.h.
|
|
*/
|
|
|
|
#include "fmt/printf.h"
|
|
#include "gtest-extra.h"
|
|
|
|
using fmt::printf_arg_formatter;
|
|
|
|
// A custom argument formatter that doesn't print `-` for floating-point values
|
|
// rounded to 0.
|
|
class CustomArgFormatter :
|
|
public fmt::arg_formatter<fmt::back_insert_range<fmt::internal::buffer>> {
|
|
public:
|
|
using range = fmt::back_insert_range<fmt::internal::buffer>;
|
|
using base = fmt::arg_formatter<range>;
|
|
|
|
CustomArgFormatter(fmt::basic_context<range> &ctx, fmt::format_specs &s)
|
|
: base(ctx, s) {}
|
|
|
|
using base::operator();
|
|
|
|
void operator()(double value) {
|
|
if (round(value * pow(10, spec().precision())) == 0)
|
|
value = 0;
|
|
base::operator()(value);
|
|
}
|
|
};
|
|
|
|
std::string custom_vformat(fmt::string_view format_str, fmt::format_args args) {
|
|
fmt::memory_buffer buffer;
|
|
// Pass custom argument formatter as a template arg to vwrite.
|
|
fmt::do_vformat_to<CustomArgFormatter>(buffer, format_str, args);
|
|
return std::string(buffer.data(), buffer.size());
|
|
}
|
|
|
|
template <typename... Args>
|
|
std::string custom_format(const char *format_str, const Args & ... args) {
|
|
auto va = fmt::make_args(args...);
|
|
return custom_vformat(format_str, va);
|
|
}
|
|
|
|
TEST(CustomFormatterTest, Format) {
|
|
EXPECT_EQ("0.00", custom_format("{:.2f}", -.00001));
|
|
}
|