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tinyformat.h
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1 // tinyformat.h
2 // Copyright (C) 2011, Chris Foster [chris42f (at) gmail (d0t) com]
3 //
4 // Boost Software License - Version 1.0
5 //
6 // Permission is hereby granted, free of charge, to any person or organization
7 // obtaining a copy of the software and accompanying documentation covered by
8 // this license (the "Software") to use, reproduce, display, distribute,
9 // execute, and transmit the Software, and to prepare derivative works of the
10 // Software, and to permit third-parties to whom the Software is furnished to
11 // do so, all subject to the following:
12 //
13 // The copyright notices in the Software and this entire statement, including
14 // the above license grant, this restriction and the following disclaimer,
15 // must be included in all copies of the Software, in whole or in part, and
16 // all derivative works of the Software, unless such copies or derivative
17 // works are solely in the form of machine-executable object code generated by
18 // a source language processor.
19 //
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23 // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24 // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 // DEALINGS IN THE SOFTWARE.
27 
28 //------------------------------------------------------------------------------
29 // Tinyformat: A minimal type safe printf replacement
30 //
31 // tinyformat.h is a type safe printf replacement library in a single C++
32 // header file. Design goals include:
33 //
34 // * Type safety and extensibility for user defined types.
35 // * C99 printf() compatibility, to the extent possible using std::ostream
36 // * POSIX extension for positional arguments
37 // * Simplicity and minimalism. A single header file to include and distribute
38 // with your projects.
39 // * Augment rather than replace the standard stream formatting mechanism
40 // * C++98 support, with optional C++11 niceties
41 //
42 //
43 // Main interface example usage
44 // ----------------------------
45 //
46 // To print a date to std::cout for American usage:
47 //
48 // std::string weekday = "Wednesday";
49 // const char* month = "July";
50 // size_t day = 27;
51 // long hour = 14;
52 // int min = 44;
53 //
54 // tfm::printf("%s, %s %d, %.2d:%.2d\n", weekday, month, day, hour, min);
55 //
56 // POSIX extension for positional arguments is available.
57 // The ability to rearrange formatting arguments is an important feature
58 // for localization because the word order may vary in different languages.
59 //
60 // Previous example for German usage. Arguments are reordered:
61 //
62 // tfm::printf("%1$s, %3$d. %2$s, %4$d:%5$.2d\n", weekday, month, day, hour, min);
63 //
64 // The strange types here emphasize the type safety of the interface; it is
65 // possible to print a std::string using the "%s" conversion, and a
66 // size_t using the "%d" conversion. A similar result could be achieved
67 // using either of the tfm::format() functions. One prints on a user provided
68 // stream:
69 //
70 // tfm::format(std::cerr, "%s, %s %d, %.2d:%.2d\n",
71 // weekday, month, day, hour, min);
72 //
73 // The other returns a std::string:
74 //
75 // std::string date = tfm::format("%s, %s %d, %.2d:%.2d\n",
76 // weekday, month, day, hour, min);
77 // std::cout << date;
78 //
79 // These are the three primary interface functions. There is also a
80 // convenience function printfln() which appends a newline to the usual result
81 // of printf() for super simple logging.
82 //
83 //
84 // User defined format functions
85 // -----------------------------
86 //
87 // Simulating variadic templates in C++98 is pretty painful since it requires
88 // writing out the same function for each desired number of arguments. To make
89 // this bearable tinyformat comes with a set of macros which are used
90 // internally to generate the API, but which may also be used in user code.
91 //
92 // The three macros TINYFORMAT_ARGTYPES(n), TINYFORMAT_VARARGS(n) and
93 // TINYFORMAT_PASSARGS(n) will generate a list of n argument types,
94 // type/name pairs and argument names respectively when called with an integer
95 // n between 1 and 16. We can use these to define a macro which generates the
96 // desired user defined function with n arguments. To generate all 16 user
97 // defined function bodies, use the macro TINYFORMAT_FOREACH_ARGNUM. For an
98 // example, see the implementation of printf() at the end of the source file.
99 //
100 // Sometimes it's useful to be able to pass a list of format arguments through
101 // to a non-template function. The FormatList class is provided as a way to do
102 // this by storing the argument list in a type-opaque way. Continuing the
103 // example from above, we construct a FormatList using makeFormatList():
104 //
105 // FormatListRef formatList = tfm::makeFormatList(weekday, month, day, hour, min);
106 //
107 // The format list can now be passed into any non-template function and used
108 // via a call to the vformat() function:
109 //
110 // tfm::vformat(std::cout, "%s, %s %d, %.2d:%.2d\n", formatList);
111 //
112 //
113 // Additional API information
114 // --------------------------
115 //
116 // Error handling: Define TINYFORMAT_ERROR to customize the error handling for
117 // format strings which are unsupported or have the wrong number of format
118 // specifiers (calls assert() by default).
119 //
120 // User defined types: Uses operator<< for user defined types by default.
121 // Overload formatValue() for more control.
122 
123 
124 #ifndef TINYFORMAT_H_INCLUDED
125 #define TINYFORMAT_H_INCLUDED
126 
127 namespace tinyformat {}
128 //------------------------------------------------------------------------------
129 // Config section. Customize to your liking!
130 
131 // Namespace alias to encourage brevity
132 namespace tfm = tinyformat;
133 
134 // Error handling; calls assert() by default.
135 #define TINYFORMAT_ERROR(reasonString) throw tinyformat::format_error(reasonString)
136 
137 // Define for C++11 variadic templates which make the code shorter & more
138 // general. If you don't define this, C++11 support is autodetected below.
139 #define TINYFORMAT_USE_VARIADIC_TEMPLATES
140 
141 
142 //------------------------------------------------------------------------------
143 // Implementation details.
144 #include <algorithm>
145 #include <iostream>
146 #include <sstream>
147 #include <stdexcept> // Added for Bitcoin Core
148 
149 #ifndef TINYFORMAT_ASSERT
150 # include <cassert>
151 # define TINYFORMAT_ASSERT(cond) assert(cond)
152 #endif
153 
154 #ifndef TINYFORMAT_ERROR
155 # include <cassert>
156 # define TINYFORMAT_ERROR(reason) assert(0 && reason)
157 #endif
158 
159 #if !defined(TINYFORMAT_USE_VARIADIC_TEMPLATES) && !defined(TINYFORMAT_NO_VARIADIC_TEMPLATES)
160 # ifdef __GXX_EXPERIMENTAL_CXX0X__
161 # define TINYFORMAT_USE_VARIADIC_TEMPLATES
162 # endif
163 #endif
164 
165 #if defined(__GLIBCXX__) && __GLIBCXX__ < 20080201
166 // std::showpos is broken on old libstdc++ as provided with macOS. See
167 // http://gcc.gnu.org/ml/libstdc++/2007-11/msg00075.html
168 # define TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
169 #endif
170 
171 #ifdef __APPLE__
172 // Workaround macOS linker warning: Xcode uses different default symbol
173 // visibilities for static libs vs executables (see issue #25)
174 # define TINYFORMAT_HIDDEN __attribute__((visibility("hidden")))
175 #else
176 # define TINYFORMAT_HIDDEN
177 #endif
178 
179 namespace tinyformat {
180 
181 // Added for Bitcoin Core
182 class format_error: public std::runtime_error
183 {
184 public:
185  explicit format_error(const std::string &what): std::runtime_error(what) {
186  }
187 };
188 
189 //------------------------------------------------------------------------------
190 namespace detail {
191 
192 // Test whether type T1 is convertible to type T2
193 template <typename T1, typename T2>
195 {
196  private:
197  // two types of different size
198  struct fail { char dummy[2]; };
199  struct succeed { char dummy; };
200  // Try to convert a T1 to a T2 by plugging into tryConvert
201  static fail tryConvert(...);
202  static succeed tryConvert(const T2&);
203  static const T1& makeT1();
204  public:
205 # ifdef _MSC_VER
206  // Disable spurious loss of precision warnings in tryConvert(makeT1())
207 # pragma warning(push)
208 # pragma warning(disable:4244)
209 # pragma warning(disable:4267)
210 # endif
211  // Standard trick: the (...) version of tryConvert will be chosen from
212  // the overload set only if the version taking a T2 doesn't match.
213  // Then we compare the sizes of the return types to check which
214  // function matched. Very neat, in a disgusting kind of way :)
215  static const bool value =
216  sizeof(tryConvert(makeT1())) == sizeof(succeed);
217 # ifdef _MSC_VER
218 # pragma warning(pop)
219 # endif
220 };
221 
222 
223 // Detect when a type is not a wchar_t string
224 template<typename T> struct is_wchar { typedef int tinyformat_wchar_is_not_supported; };
225 template<> struct is_wchar<wchar_t*> {};
226 template<> struct is_wchar<const wchar_t*> {};
227 template<int n> struct is_wchar<const wchar_t[n]> {};
228 template<int n> struct is_wchar<wchar_t[n]> {};
229 
230 
231 // Format the value by casting to type fmtT. This default implementation
232 // should never be called.
233 template<typename T, typename fmtT, bool convertible = is_convertible<T, fmtT>::value>
235 {
236  static void invoke(std::ostream& /*out*/, const T& /*value*/) { TINYFORMAT_ASSERT(0); }
237 };
238 // Specialized version for types that can actually be converted to fmtT, as
239 // indicated by the "convertible" template parameter.
240 template<typename T, typename fmtT>
241 struct formatValueAsType<T,fmtT,true>
242 {
243  static void invoke(std::ostream& out, const T& value)
244  { out << static_cast<fmtT>(value); }
245 };
246 
247 #ifdef TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
248 template<typename T, bool convertible = is_convertible<T, int>::value>
249 struct formatZeroIntegerWorkaround
250 {
251  static bool invoke(std::ostream& , const T& ) { return false; }
252 };
253 template<typename T>
254 struct formatZeroIntegerWorkaround<T,true>
255 {
256  static bool invoke(std::ostream& out, const T& value)
257  {
258  if (static_cast<int>(value) == 0 && out.flags() & std::ios::showpos) {
259  out << "+0";
260  return true;
261  }
262  return false;
263  }
264 };
265 #endif // TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
266 
267 // Convert an arbitrary type to integer. The version with convertible=false
268 // throws an error.
269 template<typename T, bool convertible = is_convertible<T,int>::value>
271 {
272  static int invoke(const T& /*value*/)
273  {
274  TINYFORMAT_ERROR("tinyformat: Cannot convert from argument type to "
275  "integer for use as variable width or precision");
276  return 0;
277  }
278 };
279 // Specialization for convertToInt when conversion is possible
280 template<typename T>
281 struct convertToInt<T,true>
282 {
283  static int invoke(const T& value) { return static_cast<int>(value); }
284 };
285 
286 // Format at most ntrunc characters to the given stream.
287 template<typename T>
288 inline void formatTruncated(std::ostream& out, const T& value, int ntrunc)
289 {
290  std::ostringstream tmp;
291  tmp << value;
292  std::string result = tmp.str();
293  out.write(result.c_str(), (std::min)(ntrunc, static_cast<int>(result.size())));
294 }
295 #define TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(type) \
296 inline void formatTruncated(std::ostream& out, type* value, int ntrunc) \
297 { \
298  std::streamsize len = 0; \
299  while (len < ntrunc && value[len] != 0) \
300  ++len; \
301  out.write(value, len); \
302 }
303 // Overload for const char* and char*. Could overload for signed & unsigned
304 // char too, but these are technically unneeded for printf compatibility.
307 #undef TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR
308 
309 } // namespace detail
310 
311 
312 //------------------------------------------------------------------------------
313 // Variable formatting functions. May be overridden for user-defined types if
314 // desired.
315 
316 
328 template<typename T>
329 inline void formatValue(std::ostream& out, const char* /*fmtBegin*/,
330  const char* fmtEnd, int ntrunc, const T& value)
331 {
332 #ifndef TINYFORMAT_ALLOW_WCHAR_STRINGS
333  // Since we don't support printing of wchar_t using "%ls", make it fail at
334  // compile time in preference to printing as a void* at runtime.
336  (void) DummyType(); // avoid unused type warning with gcc-4.8
337 #endif
338  // The mess here is to support the %c and %p conversions: if these
339  // conversions are active we try to convert the type to a char or const
340  // void* respectively and format that instead of the value itself. For the
341  // %p conversion it's important to avoid dereferencing the pointer, which
342  // could otherwise lead to a crash when printing a dangling (const char*).
343  const bool canConvertToChar = detail::is_convertible<T,char>::value;
344  const bool canConvertToVoidPtr = detail::is_convertible<T, const void*>::value;
345  if (canConvertToChar && *(fmtEnd-1) == 'c')
347  else if (canConvertToVoidPtr && *(fmtEnd-1) == 'p')
349 #ifdef TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
350  else if (detail::formatZeroIntegerWorkaround<T>::invoke(out, value)) ;
351 #endif
352  else if (ntrunc >= 0) {
353  // Take care not to overread C strings in truncating conversions like
354  // "%.4s" where at most 4 characters may be read.
355  detail::formatTruncated(out, value, ntrunc);
356  }
357  else
358  out << value;
359 }
360 
361 
362 // Overloaded version for char types to support printing as an integer
363 #define TINYFORMAT_DEFINE_FORMATVALUE_CHAR(charType) \
364 inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, \
365  const char* fmtEnd, int , charType value) \
366 { \
367  switch (*(fmtEnd-1)) { \
368  case 'u': case 'd': case 'i': case 'o': case 'X': case 'x': \
369  out << static_cast<int>(value); break; \
370  default: \
371  out << value; break; \
372  } \
373 }
374 // per 3.9.1: char, signed char and unsigned char are all distinct types
378 #undef TINYFORMAT_DEFINE_FORMATVALUE_CHAR
379 
380 
381 //------------------------------------------------------------------------------
382 // Tools for emulating variadic templates in C++98. The basic idea here is
383 // stolen from the boost preprocessor metaprogramming library and cut down to
384 // be just general enough for what we need.
385 
386 #define TINYFORMAT_ARGTYPES(n) TINYFORMAT_ARGTYPES_ ## n
387 #define TINYFORMAT_VARARGS(n) TINYFORMAT_VARARGS_ ## n
388 #define TINYFORMAT_PASSARGS(n) TINYFORMAT_PASSARGS_ ## n
389 #define TINYFORMAT_PASSARGS_TAIL(n) TINYFORMAT_PASSARGS_TAIL_ ## n
390 
391 // To keep it as transparent as possible, the macros below have been generated
392 // using python via the excellent cog.py code generation script. This avoids
393 // the need for a bunch of complex (but more general) preprocessor tricks as
394 // used in boost.preprocessor.
395 //
396 // To rerun the code generation in place, use `cog.py -r tinyformat.h`
397 // (see http://nedbatchelder.com/code/cog). Alternatively you can just create
398 // extra versions by hand.
399 
400 /*[[[cog
401 maxParams = 16
402 
403 def makeCommaSepLists(lineTemplate, elemTemplate, startInd=1):
404  for j in range(startInd,maxParams+1):
405  list = ', '.join([elemTemplate % {'i':i} for i in range(startInd,j+1)])
406  cog.outl(lineTemplate % {'j':j, 'list':list})
407 
408 makeCommaSepLists('#define TINYFORMAT_ARGTYPES_%(j)d %(list)s',
409  'class T%(i)d')
410 
411 cog.outl()
412 makeCommaSepLists('#define TINYFORMAT_VARARGS_%(j)d %(list)s',
413  'const T%(i)d& v%(i)d')
414 
415 cog.outl()
416 makeCommaSepLists('#define TINYFORMAT_PASSARGS_%(j)d %(list)s', 'v%(i)d')
417 
418 cog.outl()
419 cog.outl('#define TINYFORMAT_PASSARGS_TAIL_1')
420 makeCommaSepLists('#define TINYFORMAT_PASSARGS_TAIL_%(j)d , %(list)s',
421  'v%(i)d', startInd = 2)
422 
423 cog.outl()
424 cog.outl('#define TINYFORMAT_FOREACH_ARGNUM(m) \\\n ' +
425  ' '.join(['m(%d)' % (j,) for j in range(1,maxParams+1)]))
426 ]]]*/
427 #define TINYFORMAT_ARGTYPES_1 class T1
428 #define TINYFORMAT_ARGTYPES_2 class T1, class T2
429 #define TINYFORMAT_ARGTYPES_3 class T1, class T2, class T3
430 #define TINYFORMAT_ARGTYPES_4 class T1, class T2, class T3, class T4
431 #define TINYFORMAT_ARGTYPES_5 class T1, class T2, class T3, class T4, class T5
432 #define TINYFORMAT_ARGTYPES_6 class T1, class T2, class T3, class T4, class T5, class T6
433 #define TINYFORMAT_ARGTYPES_7 class T1, class T2, class T3, class T4, class T5, class T6, class T7
434 #define TINYFORMAT_ARGTYPES_8 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8
435 #define TINYFORMAT_ARGTYPES_9 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9
436 #define TINYFORMAT_ARGTYPES_10 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10
437 #define TINYFORMAT_ARGTYPES_11 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11
438 #define TINYFORMAT_ARGTYPES_12 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12
439 #define TINYFORMAT_ARGTYPES_13 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13
440 #define TINYFORMAT_ARGTYPES_14 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14
441 #define TINYFORMAT_ARGTYPES_15 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14, class T15
442 #define TINYFORMAT_ARGTYPES_16 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14, class T15, class T16
443 
444 #define TINYFORMAT_VARARGS_1 const T1& v1
445 #define TINYFORMAT_VARARGS_2 const T1& v1, const T2& v2
446 #define TINYFORMAT_VARARGS_3 const T1& v1, const T2& v2, const T3& v3
447 #define TINYFORMAT_VARARGS_4 const T1& v1, const T2& v2, const T3& v3, const T4& v4
448 #define TINYFORMAT_VARARGS_5 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5
449 #define TINYFORMAT_VARARGS_6 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6
450 #define TINYFORMAT_VARARGS_7 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7
451 #define TINYFORMAT_VARARGS_8 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8
452 #define TINYFORMAT_VARARGS_9 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9
453 #define TINYFORMAT_VARARGS_10 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10
454 #define TINYFORMAT_VARARGS_11 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11
455 #define TINYFORMAT_VARARGS_12 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12
456 #define TINYFORMAT_VARARGS_13 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13
457 #define TINYFORMAT_VARARGS_14 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14
458 #define TINYFORMAT_VARARGS_15 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14, const T15& v15
459 #define TINYFORMAT_VARARGS_16 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14, const T15& v15, const T16& v16
460 
461 #define TINYFORMAT_PASSARGS_1 v1
462 #define TINYFORMAT_PASSARGS_2 v1, v2
463 #define TINYFORMAT_PASSARGS_3 v1, v2, v3
464 #define TINYFORMAT_PASSARGS_4 v1, v2, v3, v4
465 #define TINYFORMAT_PASSARGS_5 v1, v2, v3, v4, v5
466 #define TINYFORMAT_PASSARGS_6 v1, v2, v3, v4, v5, v6
467 #define TINYFORMAT_PASSARGS_7 v1, v2, v3, v4, v5, v6, v7
468 #define TINYFORMAT_PASSARGS_8 v1, v2, v3, v4, v5, v6, v7, v8
469 #define TINYFORMAT_PASSARGS_9 v1, v2, v3, v4, v5, v6, v7, v8, v9
470 #define TINYFORMAT_PASSARGS_10 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10
471 #define TINYFORMAT_PASSARGS_11 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
472 #define TINYFORMAT_PASSARGS_12 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12
473 #define TINYFORMAT_PASSARGS_13 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13
474 #define TINYFORMAT_PASSARGS_14 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14
475 #define TINYFORMAT_PASSARGS_15 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15
476 #define TINYFORMAT_PASSARGS_16 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16
477 
478 #define TINYFORMAT_PASSARGS_TAIL_1
479 #define TINYFORMAT_PASSARGS_TAIL_2 , v2
480 #define TINYFORMAT_PASSARGS_TAIL_3 , v2, v3
481 #define TINYFORMAT_PASSARGS_TAIL_4 , v2, v3, v4
482 #define TINYFORMAT_PASSARGS_TAIL_5 , v2, v3, v4, v5
483 #define TINYFORMAT_PASSARGS_TAIL_6 , v2, v3, v4, v5, v6
484 #define TINYFORMAT_PASSARGS_TAIL_7 , v2, v3, v4, v5, v6, v7
485 #define TINYFORMAT_PASSARGS_TAIL_8 , v2, v3, v4, v5, v6, v7, v8
486 #define TINYFORMAT_PASSARGS_TAIL_9 , v2, v3, v4, v5, v6, v7, v8, v9
487 #define TINYFORMAT_PASSARGS_TAIL_10 , v2, v3, v4, v5, v6, v7, v8, v9, v10
488 #define TINYFORMAT_PASSARGS_TAIL_11 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
489 #define TINYFORMAT_PASSARGS_TAIL_12 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12
490 #define TINYFORMAT_PASSARGS_TAIL_13 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13
491 #define TINYFORMAT_PASSARGS_TAIL_14 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14
492 #define TINYFORMAT_PASSARGS_TAIL_15 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15
493 #define TINYFORMAT_PASSARGS_TAIL_16 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16
494 
495 #define TINYFORMAT_FOREACH_ARGNUM(m) \
496  m(1) m(2) m(3) m(4) m(5) m(6) m(7) m(8) m(9) m(10) m(11) m(12) m(13) m(14) m(15) m(16)
497 //[[[end]]]
498 
499 
500 
501 namespace detail {
502 
503 // Type-opaque holder for an argument to format(), with associated actions on
504 // the type held as explicit function pointers. This allows FormatArg's for
505 // each argument to be allocated as a homogeneous array inside FormatList
506 // whereas a naive implementation based on inheritance does not.
508 {
509  public:
511  { }
512 
513  template<typename T>
514  explicit FormatArg(const T& value)
515  : m_value(static_cast<const void*>(&value)),
518  { }
519 
520  void format(std::ostream& out, const char* fmtBegin,
521  const char* fmtEnd, int ntrunc) const
522  {
525  m_formatImpl(out, fmtBegin, fmtEnd, ntrunc, m_value);
526  }
527 
528  int toInt() const
529  {
532  return m_toIntImpl(m_value);
533  }
534 
535  private:
536  template<typename T>
537  TINYFORMAT_HIDDEN static void formatImpl(std::ostream& out, const char* fmtBegin,
538  const char* fmtEnd, int ntrunc, const void* value)
539  {
540  formatValue(out, fmtBegin, fmtEnd, ntrunc, *static_cast<const T*>(value));
541  }
542 
543  template<typename T>
544  TINYFORMAT_HIDDEN static int toIntImpl(const void* value)
545  {
546  return convertToInt<T>::invoke(*static_cast<const T*>(value));
547  }
548 
549  const void* m_value{nullptr};
550  void (*m_formatImpl)(std::ostream& out, const char* fmtBegin,
551  const char* fmtEnd, int ntrunc, const void* value){nullptr};
552  int (*m_toIntImpl)(const void* value){nullptr};
553 };
554 
555 
556 // Parse and return an integer from the string c, as atoi()
557 // On return, c is set to one past the end of the integer.
558 inline int parseIntAndAdvance(const char*& c)
559 {
560  int i = 0;
561  for (;*c >= '0' && *c <= '9'; ++c)
562  i = 10*i + (*c - '0');
563  return i;
564 }
565 
566 // Parse width or precision `n` from format string pointer `c`, and advance it
567 // to the next character. If an indirection is requested with `*`, the argument
568 // is read from `args[argIndex]` and `argIndex` is incremented (or read
569 // from `args[n]` in positional mode). Returns true if one or more
570 // characters were read.
571 inline bool parseWidthOrPrecision(int& n, const char*& c, bool positionalMode,
572  const detail::FormatArg* args,
573  int& argIndex, int numArgs)
574 {
575  if (*c >= '0' && *c <= '9') {
576  n = parseIntAndAdvance(c);
577  }
578  else if (*c == '*') {
579  ++c;
580  n = 0;
581  if (positionalMode) {
582  int pos = parseIntAndAdvance(c) - 1;
583  if (*c != '$')
584  TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
585  if (pos >= 0 && pos < numArgs)
586  n = args[pos].toInt();
587  else
588  TINYFORMAT_ERROR("tinyformat: Positional argument out of range");
589  ++c;
590  }
591  else {
592  if (argIndex < numArgs)
593  n = args[argIndex++].toInt();
594  else
595  TINYFORMAT_ERROR("tinyformat: Not enough arguments to read variable width or precision");
596  }
597  }
598  else {
599  return false;
600  }
601  return true;
602 }
603 
604 // Print literal part of format string and return next format spec position.
605 //
606 // Skips over any occurrences of '%%', printing a literal '%' to the output.
607 // The position of the first % character of the next nontrivial format spec is
608 // returned, or the end of string.
609 inline const char* printFormatStringLiteral(std::ostream& out, const char* fmt)
610 {
611  const char* c = fmt;
612  for (;; ++c) {
613  if (*c == '\0') {
614  out.write(fmt, c - fmt);
615  return c;
616  }
617  else if (*c == '%') {
618  out.write(fmt, c - fmt);
619  if (*(c+1) != '%')
620  return c;
621  // for "%%", tack trailing % onto next literal section.
622  fmt = ++c;
623  }
624  }
625 }
626 
627 
628 // Parse a format string and set the stream state accordingly.
629 //
630 // The format mini-language recognized here is meant to be the one from C99,
631 // with the form "%[flags][width][.precision][length]type" with POSIX
632 // positional arguments extension.
633 //
634 // POSIX positional arguments extension:
635 // Conversions can be applied to the nth argument after the format in
636 // the argument list, rather than to the next unused argument. In this case,
637 // the conversion specifier character % (see below) is replaced by the sequence
638 // "%n$", where n is a decimal integer in the range [1,{NL_ARGMAX}],
639 // giving the position of the argument in the argument list. This feature
640 // provides for the definition of format strings that select arguments
641 // in an order appropriate to specific languages.
642 //
643 // The format can contain either numbered argument conversion specifications
644 // (that is, "%n$" and "*m$"), or unnumbered argument conversion specifications
645 // (that is, % and * ), but not both. The only exception to this is that %%
646 // can be mixed with the "%n$" form. The results of mixing numbered and
647 // unnumbered argument specifications in a format string are undefined.
648 // When numbered argument specifications are used, specifying the Nth argument
649 // requires that all the leading arguments, from the first to the (N-1)th,
650 // are specified in the format string.
651 //
652 // In format strings containing the "%n$" form of conversion specification,
653 // numbered arguments in the argument list can be referenced from the format
654 // string as many times as required.
655 //
656 // Formatting options which can't be natively represented using the ostream
657 // state are returned in spacePadPositive (for space padded positive numbers)
658 // and ntrunc (for truncating conversions). argIndex is incremented if
659 // necessary to pull out variable width and precision. The function returns a
660 // pointer to the character after the end of the current format spec.
661 inline const char* streamStateFromFormat(std::ostream& out, bool& positionalMode,
662  bool& spacePadPositive,
663  int& ntrunc, const char* fmtStart,
664  const detail::FormatArg* args,
665  int& argIndex, int numArgs)
666 {
667  TINYFORMAT_ASSERT(*fmtStart == '%');
668  // Reset stream state to defaults.
669  out.width(0);
670  out.precision(6);
671  out.fill(' ');
672  // Reset most flags; ignore irrelevant unitbuf & skipws.
673  out.unsetf(std::ios::adjustfield | std::ios::basefield |
674  std::ios::floatfield | std::ios::showbase | std::ios::boolalpha |
675  std::ios::showpoint | std::ios::showpos | std::ios::uppercase);
676  bool precisionSet = false;
677  bool widthSet = false;
678  int widthExtra = 0;
679  const char* c = fmtStart + 1;
680 
681  // 1) Parse an argument index (if followed by '$') or a width possibly
682  // preceded with '0' flag.
683  if (*c >= '0' && *c <= '9') {
684  const char tmpc = *c;
685  int value = parseIntAndAdvance(c);
686  if (*c == '$') {
687  // value is an argument index
688  if (value > 0 && value <= numArgs)
689  argIndex = value - 1;
690  else
691  TINYFORMAT_ERROR("tinyformat: Positional argument out of range");
692  ++c;
693  positionalMode = true;
694  }
695  else if (positionalMode) {
696  TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
697  }
698  else {
699  if (tmpc == '0') {
700  // Use internal padding so that numeric values are
701  // formatted correctly, eg -00010 rather than 000-10
702  out.fill('0');
703  out.setf(std::ios::internal, std::ios::adjustfield);
704  }
705  if (value != 0) {
706  // Nonzero value means that we parsed width.
707  widthSet = true;
708  out.width(value);
709  }
710  }
711  }
712  else if (positionalMode) {
713  TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
714  }
715  // 2) Parse flags and width if we did not do it in previous step.
716  if (!widthSet) {
717  // Parse flags
718  for (;; ++c) {
719  switch (*c) {
720  case '#':
721  out.setf(std::ios::showpoint | std::ios::showbase);
722  continue;
723  case '0':
724  // overridden by left alignment ('-' flag)
725  if (!(out.flags() & std::ios::left)) {
726  // Use internal padding so that numeric values are
727  // formatted correctly, eg -00010 rather than 000-10
728  out.fill('0');
729  out.setf(std::ios::internal, std::ios::adjustfield);
730  }
731  continue;
732  case '-':
733  out.fill(' ');
734  out.setf(std::ios::left, std::ios::adjustfield);
735  continue;
736  case ' ':
737  // overridden by show positive sign, '+' flag.
738  if (!(out.flags() & std::ios::showpos))
739  spacePadPositive = true;
740  continue;
741  case '+':
742  out.setf(std::ios::showpos);
743  spacePadPositive = false;
744  widthExtra = 1;
745  continue;
746  default:
747  break;
748  }
749  break;
750  }
751  // Parse width
752  int width = 0;
753  widthSet = parseWidthOrPrecision(width, c, positionalMode,
754  args, argIndex, numArgs);
755  if (widthSet) {
756  if (width < 0) {
757  // negative widths correspond to '-' flag set
758  out.fill(' ');
759  out.setf(std::ios::left, std::ios::adjustfield);
760  width = -width;
761  }
762  out.width(width);
763  }
764  }
765  // 3) Parse precision
766  if (*c == '.') {
767  ++c;
768  int precision = 0;
769  parseWidthOrPrecision(precision, c, positionalMode,
770  args, argIndex, numArgs);
771  // Presence of `.` indicates precision set, unless the inferred value
772  // was negative in which case the default is used.
773  precisionSet = precision >= 0;
774  if (precisionSet)
775  out.precision(precision);
776  }
777  // 4) Ignore any C99 length modifier
778  while (*c == 'l' || *c == 'h' || *c == 'L' ||
779  *c == 'j' || *c == 'z' || *c == 't') {
780  ++c;
781  }
782  // 5) We're up to the conversion specifier character.
783  // Set stream flags based on conversion specifier (thanks to the
784  // boost::format class for forging the way here).
785  bool intConversion = false;
786  switch (*c) {
787  case 'u': case 'd': case 'i':
788  out.setf(std::ios::dec, std::ios::basefield);
789  intConversion = true;
790  break;
791  case 'o':
792  out.setf(std::ios::oct, std::ios::basefield);
793  intConversion = true;
794  break;
795  case 'X':
796  out.setf(std::ios::uppercase);
797  [[fallthrough]];
798  case 'x': case 'p':
799  out.setf(std::ios::hex, std::ios::basefield);
800  intConversion = true;
801  break;
802  case 'E':
803  out.setf(std::ios::uppercase);
804  [[fallthrough]];
805  case 'e':
806  out.setf(std::ios::scientific, std::ios::floatfield);
807  out.setf(std::ios::dec, std::ios::basefield);
808  break;
809  case 'F':
810  out.setf(std::ios::uppercase);
811  [[fallthrough]];
812  case 'f':
813  out.setf(std::ios::fixed, std::ios::floatfield);
814  break;
815  case 'A':
816  out.setf(std::ios::uppercase);
817  [[fallthrough]];
818  case 'a':
819 # ifdef _MSC_VER
820  // Workaround https://developercommunity.visualstudio.com/content/problem/520472/hexfloat-stream-output-does-not-ignore-precision-a.html
821  // by always setting maximum precision on MSVC to avoid precision
822  // loss for doubles.
823  out.precision(13);
824 # endif
825  out.setf(std::ios::fixed | std::ios::scientific, std::ios::floatfield);
826  break;
827  case 'G':
828  out.setf(std::ios::uppercase);
829  [[fallthrough]];
830  case 'g':
831  out.setf(std::ios::dec, std::ios::basefield);
832  // As in boost::format, let stream decide float format.
833  out.flags(out.flags() & ~std::ios::floatfield);
834  break;
835  case 'c':
836  // Handled as special case inside formatValue()
837  break;
838  case 's':
839  if (precisionSet)
840  ntrunc = static_cast<int>(out.precision());
841  // Make %s print Booleans as "true" and "false"
842  out.setf(std::ios::boolalpha);
843  break;
844  case 'n':
845  // Not supported - will cause problems!
846  TINYFORMAT_ERROR("tinyformat: %n conversion spec not supported");
847  break;
848  case '\0':
849  TINYFORMAT_ERROR("tinyformat: Conversion spec incorrectly "
850  "terminated by end of string");
851  return c;
852  default:
853  break;
854  }
855  if (intConversion && precisionSet && !widthSet) {
856  // "precision" for integers gives the minimum number of digits (to be
857  // padded with zeros on the left). This isn't really supported by the
858  // iostreams, but we can approximately simulate it with the width if
859  // the width isn't otherwise used.
860  out.width(out.precision() + widthExtra);
861  out.setf(std::ios::internal, std::ios::adjustfield);
862  out.fill('0');
863  }
864  return c+1;
865 }
866 
867 
868 //------------------------------------------------------------------------------
869 inline void formatImpl(std::ostream& out, const char* fmt,
870  const detail::FormatArg* args,
871  int numArgs)
872 {
873  // Saved stream state
874  std::streamsize origWidth = out.width();
875  std::streamsize origPrecision = out.precision();
876  std::ios::fmtflags origFlags = out.flags();
877  char origFill = out.fill();
878 
879  // "Positional mode" means all format specs should be of the form "%n$..."
880  // with `n` an integer. We detect this in `streamStateFromFormat`.
881  bool positionalMode = false;
882  int argIndex = 0;
883  while (true) {
884  fmt = printFormatStringLiteral(out, fmt);
885  if (*fmt == '\0') {
886  if (!positionalMode && argIndex < numArgs) {
887  TINYFORMAT_ERROR("tinyformat: Not enough conversion specifiers in format string");
888  }
889  break;
890  }
891  bool spacePadPositive = false;
892  int ntrunc = -1;
893  const char* fmtEnd = streamStateFromFormat(out, positionalMode, spacePadPositive, ntrunc, fmt,
894  args, argIndex, numArgs);
895  // NB: argIndex may be incremented by reading variable width/precision
896  // in `streamStateFromFormat`, so do the bounds check here.
897  if (argIndex >= numArgs) {
898  TINYFORMAT_ERROR("tinyformat: Too many conversion specifiers in format string");
899  return;
900  }
901  const FormatArg& arg = args[argIndex];
902  // Format the arg into the stream.
903  if (!spacePadPositive) {
904  arg.format(out, fmt, fmtEnd, ntrunc);
905  }
906  else {
907  // The following is a special case with no direct correspondence
908  // between stream formatting and the printf() behaviour. Simulate
909  // it crudely by formatting into a temporary string stream and
910  // munging the resulting string.
911  std::ostringstream tmpStream;
912  tmpStream.copyfmt(out);
913  tmpStream.setf(std::ios::showpos);
914  arg.format(tmpStream, fmt, fmtEnd, ntrunc);
915  std::string result = tmpStream.str(); // allocates... yuck.
916  for (size_t i = 0, iend = result.size(); i < iend; ++i) {
917  if (result[i] == '+')
918  result[i] = ' ';
919  }
920  out << result;
921  }
922  if (!positionalMode)
923  ++argIndex;
924  fmt = fmtEnd;
925  }
926 
927  // Restore stream state
928  out.width(origWidth);
929  out.precision(origPrecision);
930  out.flags(origFlags);
931  out.fill(origFill);
932 }
933 
934 } // namespace detail
935 
936 
944 {
945  public:
947  : m_args(args), m_N(N) { }
948 
949  friend void vformat(std::ostream& out, const char* fmt,
950  const FormatList& list);
951 
952  private:
954  int m_N;
955 };
956 
958 typedef const FormatList& FormatListRef;
959 
960 
961 namespace detail {
962 
963 // Format list subclass with fixed storage to avoid dynamic allocation
964 template<int N>
965 class FormatListN : public FormatList
966 {
967  public:
968 #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
969  template<typename... Args>
970  explicit FormatListN(const Args&... args)
971  : FormatList(&m_formatterStore[0], N),
973  { static_assert(sizeof...(args) == N, "Number of args must be N"); }
974 #else // C++98 version
975  void init(int) {}
976 # define TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR(n) \
977  \
978  template<TINYFORMAT_ARGTYPES(n)> \
979  FormatListN(TINYFORMAT_VARARGS(n)) \
980  : FormatList(&m_formatterStore[0], n) \
981  { TINYFORMAT_ASSERT(n == N); init(0, TINYFORMAT_PASSARGS(n)); } \
982  \
983  template<TINYFORMAT_ARGTYPES(n)> \
984  void init(int i, TINYFORMAT_VARARGS(n)) \
985  { \
986  m_formatterStore[i] = FormatArg(v1); \
987  init(i+1 TINYFORMAT_PASSARGS_TAIL(n)); \
988  }
989 
990  TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR)
991 # undef TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR
992 #endif
993  FormatListN(const FormatListN& other)
994  : FormatList(&m_formatterStore[0], N)
995  { std::copy(&other.m_formatterStore[0], &other.m_formatterStore[N],
996  &m_formatterStore[0]); }
997 
998  private:
1000 };
1001 
1002 // Special 0-arg version - MSVC says zero-sized C array in struct is nonstandard
1003 template<> class FormatListN<0> : public FormatList
1004 {
1005 public:
1006  FormatListN() : FormatList(nullptr, 0) {}
1007 };
1008 
1009 } // namespace detail
1010 
1011 
1012 //------------------------------------------------------------------------------
1013 // Primary API functions
1014 
1015 #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
1016 
1023 template<typename... Args>
1024 detail::FormatListN<sizeof...(Args)> makeFormatList(const Args&... args)
1025 {
1026  return detail::FormatListN<sizeof...(args)>(args...);
1027 }
1028 
1029 #else // C++98 version
1030 
1031 inline detail::FormatListN<0> makeFormatList()
1032 {
1033  return detail::FormatListN<0>();
1034 }
1035 #define TINYFORMAT_MAKE_MAKEFORMATLIST(n) \
1036 template<TINYFORMAT_ARGTYPES(n)> \
1037 detail::FormatListN<n> makeFormatList(TINYFORMAT_VARARGS(n)) \
1038 { \
1039  return detail::FormatListN<n>(TINYFORMAT_PASSARGS(n)); \
1040 }
1041 TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_MAKEFORMATLIST)
1042 #undef TINYFORMAT_MAKE_MAKEFORMATLIST
1043 
1044 #endif
1045 
1050 inline void vformat(std::ostream& out, const char* fmt, FormatListRef list)
1051 {
1052  detail::formatImpl(out, fmt, list.m_args, list.m_N);
1053 }
1054 
1055 
1056 #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
1057 
1059 template<typename... Args>
1060 void format(std::ostream& out, const char* fmt, const Args&... args)
1061 {
1062  vformat(out, fmt, makeFormatList(args...));
1063 }
1064 
1067 template<typename... Args>
1068 std::string format(const char* fmt, const Args&... args)
1069 {
1070  std::ostringstream oss;
1071  format(oss, fmt, args...);
1072  return oss.str();
1073 }
1074 
1076 template<typename... Args>
1077 void printf(const char* fmt, const Args&... args)
1078 {
1079  format(std::cout, fmt, args...);
1080 }
1081 
1082 template<typename... Args>
1083 void printfln(const char* fmt, const Args&... args)
1084 {
1085  format(std::cout, fmt, args...);
1086  std::cout << '\n';
1087 }
1088 
1089 
1090 #else // C++98 version
1091 
1092 inline void format(std::ostream& out, const char* fmt)
1093 {
1094  vformat(out, fmt, makeFormatList());
1095 }
1096 
1097 inline std::string format(const char* fmt)
1098 {
1099  std::ostringstream oss;
1100  format(oss, fmt);
1101  return oss.str();
1102 }
1103 
1104 inline void printf(const char* fmt)
1105 {
1106  format(std::cout, fmt);
1107 }
1108 
1109 inline void printfln(const char* fmt)
1110 {
1111  format(std::cout, fmt);
1112  std::cout << '\n';
1113 }
1114 
1115 #define TINYFORMAT_MAKE_FORMAT_FUNCS(n) \
1116  \
1117 template<TINYFORMAT_ARGTYPES(n)> \
1118 void format(std::ostream& out, const char* fmt, TINYFORMAT_VARARGS(n)) \
1119 { \
1120  vformat(out, fmt, makeFormatList(TINYFORMAT_PASSARGS(n))); \
1121 } \
1122  \
1123 template<TINYFORMAT_ARGTYPES(n)> \
1124 std::string format(const char* fmt, TINYFORMAT_VARARGS(n)) \
1125 { \
1126  std::ostringstream oss; \
1127  format(oss, fmt, TINYFORMAT_PASSARGS(n)); \
1128  return oss.str(); \
1129 } \
1130  \
1131 template<TINYFORMAT_ARGTYPES(n)> \
1132 void printf(const char* fmt, TINYFORMAT_VARARGS(n)) \
1133 { \
1134  format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \
1135 } \
1136  \
1137 template<TINYFORMAT_ARGTYPES(n)> \
1138 void printfln(const char* fmt, TINYFORMAT_VARARGS(n)) \
1139 { \
1140  format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \
1141  std::cout << '\n'; \
1142 }
1143 
1144 TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMAT_FUNCS)
1145 #undef TINYFORMAT_MAKE_FORMAT_FUNCS
1146 
1147 #endif
1148 
1149 // Added for Bitcoin Core
1150 template<typename... Args>
1151 std::string format(const std::string &fmt, const Args&... args)
1152 {
1153  std::ostringstream oss;
1154  format(oss, fmt.c_str(), args...);
1155  return oss.str();
1156 }
1157 
1158 } // namespace tinyformat
1159 
1160 // Added for Bitcoin Core:
1162 #define strprintf tfm::format
1163 
1164 #endif // TINYFORMAT_H_INCLUDED
std::unique_ptr< interfaces::Init > init
ArgsManager & args
Definition: bitcoind.cpp:270
List of template arguments format(), held in a type-opaque way.
Definition: tinyformat.h:944
friend void vformat(std::ostream &out, const char *fmt, const FormatList &list)
FormatList(detail::FormatArg *args, int N)
Definition: tinyformat.h:946
const detail::FormatArg * m_args
Definition: tinyformat.h:953
static TINYFORMAT_HIDDEN void formatImpl(std::ostream &out, const char *fmtBegin, const char *fmtEnd, int ntrunc, const void *value)
Definition: tinyformat.h:537
void(* m_formatImpl)(std::ostream &out, const char *fmtBegin, const char *fmtEnd, int ntrunc, const void *value)
Definition: tinyformat.h:550
static TINYFORMAT_HIDDEN int toIntImpl(const void *value)
Definition: tinyformat.h:544
int(* m_toIntImpl)(const void *value)
Definition: tinyformat.h:552
void format(std::ostream &out, const char *fmtBegin, const char *fmtEnd, int ntrunc) const
Definition: tinyformat.h:520
FormatListN(const Args &... args)
Definition: tinyformat.h:970
FormatListN(const FormatListN &other)
Definition: tinyformat.h:993
format_error(const std::string &what)
Definition: tinyformat.h:185
#define T(expected, seed, data)
void formatTruncated(std::ostream &out, const T &value, int ntrunc)
Definition: tinyformat.h:288
int parseIntAndAdvance(const char *&c)
Definition: tinyformat.h:558
void formatImpl(std::ostream &out, const char *fmt, const detail::FormatArg *args, int numArgs)
Definition: tinyformat.h:869
const char * streamStateFromFormat(std::ostream &out, bool &positionalMode, bool &spacePadPositive, int &ntrunc, const char *fmtStart, const detail::FormatArg *args, int &argIndex, int numArgs)
Definition: tinyformat.h:661
const char * printFormatStringLiteral(std::ostream &out, const char *fmt)
Definition: tinyformat.h:609
bool parseWidthOrPrecision(int &n, const char *&c, bool positionalMode, const detail::FormatArg *args, int &argIndex, int numArgs)
Definition: tinyformat.h:571
void format(std::ostream &out, const char *fmt, const Args &... args)
Format list of arguments to the stream according to given format string.
Definition: tinyformat.h:1060
void printfln(const char *fmt, const Args &... args)
Definition: tinyformat.h:1083
void printf(const char *fmt, const Args &... args)
Format list of arguments to std::cout, according to the given format string.
Definition: tinyformat.h:1077
void vformat(std::ostream &out, const char *fmt, FormatListRef list)
Format list of arguments to the stream according to the given format string.
Definition: tinyformat.h:1050
void formatValue(std::ostream &out, const char *, const char *fmtEnd, int ntrunc, const T &value)
Format a value into a stream, delegating to operator<< by default.
Definition: tinyformat.h:329
detail::FormatListN< sizeof...(Args)> makeFormatList(const Args &... args)
Make type-agnostic format list from list of template arguments.
Definition: tinyformat.h:1024
const FormatList & FormatListRef
Reference to type-opaque format list for passing to vformat()
Definition: tinyformat.h:958
static int invoke(const T &value)
Definition: tinyformat.h:283
static int invoke(const T &)
Definition: tinyformat.h:272
static void invoke(std::ostream &out, const T &value)
Definition: tinyformat.h:243
static void invoke(std::ostream &, const T &)
Definition: tinyformat.h:236
static succeed tryConvert(const T2 &)
#define TINYFORMAT_HIDDEN
Definition: tinyformat.h:176
#define TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(type)
Definition: tinyformat.h:295
#define TINYFORMAT_ASSERT(cond)
Definition: tinyformat.h:151
#define TINYFORMAT_ERROR(reasonString)
Definition: tinyformat.h:135
#define TINYFORMAT_DEFINE_FORMATVALUE_CHAR(charType)
Definition: tinyformat.h:363
#define TINYFORMAT_FOREACH_ARGNUM(m)
Definition: tinyformat.h:495