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https://github.com/fmtlib/fmt.git
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Merge ArgInserter into TempFormatter and replace BasicFormatter::operator() with BasicWriter::Format.
This commit is contained in:
Victor Zverovich
parent
6829819b8d
commit
50cf5e17a7
163
format.h
163
format.h
@ -227,9 +227,6 @@ inline unsigned CountDigits(uint64_t n) {
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}
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}
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template <typename Char>
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class ArgInserter;
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template <typename Char>
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class FormatterProxy;
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}
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@ -435,6 +432,22 @@ DEFINE_INT_FORMATTERS(long)
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DEFINE_INT_FORMATTERS(unsigned)
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DEFINE_INT_FORMATTERS(unsigned long)
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template <typename Action>
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class BasicFormatter;
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template <typename Action, typename Char>
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class TempFormatter;
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/**
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A formatting action that does nothing.
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*/
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class NoAction {
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public:
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/** Does nothing. */
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template <typename Char>
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void operator()(const BasicFormatter<Char> &) const {}
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};
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template <typename Char>
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class BasicWriter {
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protected:
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@ -545,6 +558,15 @@ private:
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FormatString(s.data(), s.size(), spec);
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}
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/**
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Formats a string appending the output to the internal buffer.
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Arguments are accepted through the returned `TempFormatter` object
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using inserter operator `<<`.
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*/
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TempFormatter<NoAction, Char> Format(StringRef format) {
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return TempFormatter<NoAction, Char>(format);
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}
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void Clear() {
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buffer_.clear();
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}
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@ -1004,7 +1026,7 @@ class BasicFormatter : public BasicWriter<Char> {
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// constructed before the Arg object, it will be destroyed after,
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// so it will be alive in the Arg's destructor where Format is called.
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// Note that the string object will not necessarily be alive when
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// the destructor of ArgInserter is called.
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// the destructor of TempFormatter is called.
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if (formatter)
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formatter->CompleteFormatting();
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}
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@ -1017,7 +1039,9 @@ class BasicFormatter : public BasicWriter<Char> {
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int num_open_braces_;
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int next_arg_index_;
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friend class internal::ArgInserter<Char>;
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template <typename Action, typename CharT>
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friend class TempFormatter; // TODO
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friend class internal::FormatterProxy<Char>;
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void Add(const Arg &arg) {
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@ -1044,14 +1068,7 @@ class BasicFormatter : public BasicWriter<Char> {
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/**
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Constructs a formatter with an empty output buffer.
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*/
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BasicFormatter() : format_(0) {}
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/**
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Formats a string appending the output to the internal buffer.
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Arguments are accepted through the returned `ArgInserter` object
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using inserter operator `<<`.
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*/
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internal::ArgInserter<Char> operator()(StringRef format);
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BasicFormatter(const Char *format = 0) : format_(format) {}
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};
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typedef BasicFormatter<char> Formatter;
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@ -1093,66 +1110,6 @@ class FormatterProxy {
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// formatter.
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template <typename Char>
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class ArgInserter {
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private:
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mutable BasicFormatter<Char> *formatter_;
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friend class fmt::BasicFormatter<Char>;
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friend class fmt::StringRef;
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// Do not implement.
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void operator=(const ArgInserter& other);
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protected:
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explicit ArgInserter(BasicFormatter<Char> *f = 0) : formatter_(f) {}
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void Init(BasicFormatter<Char> &f, const char *format) {
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const ArgInserter &other = f(format);
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formatter_ = other.formatter_;
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other.formatter_ = 0;
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}
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ArgInserter(const ArgInserter& other)
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: formatter_(other.formatter_) {
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other.formatter_ = 0;
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}
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const BasicFormatter<Char> *Format() const {
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BasicFormatter<Char> *f = formatter_;
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if (f) {
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formatter_ = 0;
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f->CompleteFormatting();
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}
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return f;
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}
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BasicFormatter<Char> *formatter() const { return formatter_; }
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const char *format() const { return formatter_->format_; }
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void ResetFormatter() const { formatter_ = 0; }
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public:
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~ArgInserter() {
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if (formatter_)
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formatter_->CompleteFormatting();
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}
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// Feeds an argument to a formatter.
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ArgInserter &operator<<(const typename BasicFormatter<Char>::Arg &arg) {
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arg.formatter = formatter_;
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formatter_->Add(arg);
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return *this;
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}
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operator FormatterProxy<Char>() {
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BasicFormatter<Char> *f = formatter_;
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formatter_ = 0;
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return FormatterProxy<Char>(f);
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}
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operator StringRef() {
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const BasicFormatter<Char> *f = Format();
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return StringRef(f->c_str(), f->size());
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}
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};
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}
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@ -1171,35 +1128,21 @@ inline const char *c_str(internal::FormatterProxy<char> p) {
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return p.Format()->c_str();
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}
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template <typename Char>
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inline internal::ArgInserter<Char>
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BasicFormatter<Char>::operator()(StringRef format) {
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internal::ArgInserter<Char> inserter(this);
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format_ = format.c_str();
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args_.clear();
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return inserter;
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}
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/**
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A formatting action that does nothing.
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*/
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class NoAction {
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public:
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/** Does nothing. */
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template <typename Char>
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void operator()(const BasicFormatter<Char> &) const {}
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};
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/**
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A formatter with an action performed when formatting is complete.
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Objects of this class normally exist only as temporaries returned
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by one of the formatting functions which explains the name.
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*/
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template <typename Action = NoAction, typename Char = char>
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class TempFormatter : public internal::ArgInserter<Char> {
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class TempFormatter {
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private:
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friend class fmt::BasicFormatter<Char>;
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friend class fmt::StringRef;
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private:
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BasicFormatter<Char> formatter_;
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Action action_;
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bool inactive_;
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// Forbid copying other than from a temporary. Do not implement.
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TempFormatter(TempFormatter &);
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@ -1225,33 +1168,47 @@ class TempFormatter : public internal::ArgInserter<Char> {
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\endrst
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*/
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explicit TempFormatter(StringRef format, Action a = Action())
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: action_(a) {
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this->Init(formatter_, format.c_str());
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: formatter_(format.c_str()), action_(a), inactive_(false) {
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}
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/**
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Constructs a temporary formatter from a proxy object.
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*/
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TempFormatter(const Proxy &p)
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: internal::ArgInserter<Char>(0), action_(p.action) {
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this->Init(formatter_, p.format);
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}
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: formatter_(p.format), action_(p.action), inactive_(false) {}
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/**
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Performs the actual formatting, invokes the action and destroys the object.
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*/
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~TempFormatter() FMT_NOEXCEPT(false) {
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if (this->formatter())
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action_(*this->Format());
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if (!inactive_) {
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formatter_.CompleteFormatting();
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action_(formatter_);
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}
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}
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/**
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Converts a temporary formatter into a proxy object.
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*/
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operator Proxy() {
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const char *fmt = this->format();
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this->ResetFormatter();
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return Proxy(fmt, action_);
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inactive_ = true;
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return Proxy(formatter_.format_, action_);
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}
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// Feeds an argument to a formatter.
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TempFormatter &operator<<(const typename BasicFormatter<Char>::Arg &arg) {
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arg.formatter = &formatter_;
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formatter_.Add(arg);
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return *this;
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}
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operator internal::FormatterProxy<Char>() {
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return internal::FormatterProxy<Char>(&formatter_);
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}
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operator StringRef() {
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formatter_.CompleteFormatting();
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return StringRef(formatter_.c_str(), formatter_.size());
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}
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};
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@ -1015,17 +1015,17 @@ TEST(FormatterTest, FormatStringFromSpeedTest) {
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<< reinterpret_cast<void*>(1000) << 'X'));
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}
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TEST(FormatterTest, FormatterCtor) {
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Formatter format;
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EXPECT_EQ(0u, format.size());
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EXPECT_STREQ("", format.c_str());
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EXPECT_EQ("", format.str());
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format("part{0}") << 1;
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format("part{0}") << 2;
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EXPECT_EQ("part1part2", format.str());
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TEST(WriterTest, WriterCtor) {
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Writer w;
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EXPECT_EQ(0u, w.size());
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EXPECT_STREQ("", w.c_str());
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EXPECT_EQ("", w.str());
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w.Format("part{0}") << 1;
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w.Format("part{0}") << 2;
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EXPECT_EQ("part1part2", w.str());
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}
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TEST(FormatterTest, FormatterAppend) {
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/*TEST(FormatterTest, FormatterAppend) {
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Formatter format;
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format("part{0}") << 1;
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EXPECT_EQ(strlen("part1"), format.size());
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@ -1037,9 +1037,9 @@ TEST(FormatterTest, FormatterAppend) {
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EXPECT_STREQ("part1part2", format.c_str());
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EXPECT_STREQ("part1part2", format.data());
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EXPECT_EQ("part1part2", format.str());
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}
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}*/
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TEST(FormatterTest, FormatterExamples) {
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TEST(FormatTest, FormatExamples) {
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using fmt::hex;
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EXPECT_EQ("0000cafe", str(BasicWriter<char>() << pad(hex(0xcafe), 8, '0')));
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@ -1050,7 +1050,8 @@ TEST(FormatterTest, FormatterExamples) {
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EXPECT_EQ("42", str(Format(std::string("{}")) << 42));
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EXPECT_EQ("42", str(Format(Format("{{}}")) << 42));
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Formatter format;
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// TODO
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/*Formatter format;
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format("Current point:\n");
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format("({0:+f}, {1:+f})\n") << -3.14 << 3.14;
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EXPECT_EQ("Current point:\n(-3.140000, +3.140000)\n", format.str());
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@ -1061,14 +1062,15 @@ TEST(FormatterTest, FormatterExamples) {
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format("{0}") << i;
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std::string s = format.str(); // s == 0123456789
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EXPECT_EQ("0123456789", s);
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}
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}*/
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}
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TEST(FormatterTest, ArgInserter) {
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// TODO
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/*TEST(FormatterTest, ArgInserter) {
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Formatter format;
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EXPECT_EQ("1", str(format("{0}") << 1));
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EXPECT_STREQ("12", c_str(format("{0}") << 2));
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}
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}*/
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TEST(FormatterTest, StrNamespace) {
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fmt::str(Format(""));
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