68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/*
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Custom argument formatter tests
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Copyright (c) 2016, Victor Zverovich
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All rights reserved.
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For the license information refer to format.h.
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*/
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#include "fmt/printf.h"
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#include "gtest-extra.h"
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using fmt::BasicPrintfArgFormatter;
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// A custom argument formatter that doesn't print `-` for floating-point values
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// rounded to 0.
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class CustomArgFormatter
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: public fmt::BasicArgFormatter<CustomArgFormatter, char> {
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public:
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CustomArgFormatter(fmt::BasicFormatter<char, CustomArgFormatter> &f,
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fmt::FormatSpec &s, const char *fmt)
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: fmt::BasicArgFormatter<CustomArgFormatter, char>(f, s, fmt) {}
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void visit_double(double value) {
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if (round(value * pow(10, spec().precision())) == 0)
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value = 0;
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fmt::BasicArgFormatter<CustomArgFormatter, char>::visit_double(value);
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}
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};
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// A custom argument formatter that doesn't print `-` for floating-point values
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// rounded to 0.
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class CustomPrintfArgFormatter :
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public BasicPrintfArgFormatter<CustomPrintfArgFormatter, char> {
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public:
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typedef BasicPrintfArgFormatter<CustomPrintfArgFormatter, char> Base;
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CustomPrintfArgFormatter(fmt::BasicWriter<char> &w, fmt::FormatSpec &spec)
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: Base(w, spec) {}
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void visit_double(double value) {
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if (round(value * pow(10, spec().precision())) == 0)
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value = 0;
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Base::visit_double(value);
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}
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};
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std::string custom_format(const char *format_str, fmt::ArgList args) {
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fmt::MemoryWriter writer;
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// Pass custom argument formatter as a template arg to BasicFormatter.
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fmt::BasicFormatter<char, CustomArgFormatter> formatter(args, writer);
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formatter.format(format_str);
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return writer.str();
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}
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FMT_VARIADIC(std::string, custom_format, const char *)
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std::string custom_sprintf(const char* format_str, fmt::ArgList args){
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fmt::MemoryWriter writer;
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fmt::PrintfFormatter<char, CustomPrintfArgFormatter> formatter(args, writer);
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formatter.format(format_str);
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return writer.str();
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}
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FMT_VARIADIC(std::string, custom_sprintf, const char*);
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TEST(CustomFormatterTest, Format) {
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EXPECT_EQ("0.00", custom_format("{:.2f}", -.00001));
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EXPECT_EQ("0.00", custom_sprintf("%.2f", -.00001));
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}
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