mirror of
https://github.com/fmtlib/fmt.git
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1901 lines
56 KiB
C++
1901 lines
56 KiB
C++
/*
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Formatting library for C++
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Copyright (c) 2012, Victor Zverovich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FMT_FORMAT_H_
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#define FMT_FORMAT_H_
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#include <stdint.h>
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#include <cassert>
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#include <cstddef> // for std::ptrdiff_t
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#include <cstdio>
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#include <algorithm>
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#include <limits>
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#include <stdexcept>
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#include <string>
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#include <sstream>
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#if _SECURE_SCL
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# include <iterator>
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#endif
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#ifdef __GNUC__
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# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
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# define FMT_GCC_EXTENSION __extension__
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// Disable warning about "long long" which is sometimes reported even
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// when using __extension__.
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# if FMT_GCC_VERSION >= 406
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wlong-long"
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# endif
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#else
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# define FMT_GCC_EXTENSION
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#endif
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#ifdef __GNUC_LIBSTD__
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# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
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#endif
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#ifdef __has_feature
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# define FMT_HAS_FEATURE(x) __has_feature(x)
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#else
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# define FMT_HAS_FEATURE(x) 0
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#endif
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#ifdef __has_builtin
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# define FMT_HAS_BUILTIN(x) __has_builtin(x)
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#else
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# define FMT_HAS_BUILTIN(x) 0
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#endif
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#ifndef FMT_USE_VARIADIC_TEMPLATES
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// Variadic templates are available in GCC since version 4.4
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// (http://gcc.gnu.org/projects/cxx0x.html) and in Visual C++
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// since version 2013.
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# define FMT_USE_VARIADIC_TEMPLATES \
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(FMT_HAS_FEATURE(cxx_variadic_templates) || \
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(FMT_GCC_VERSION >= 404 && __cplusplus >= 201103) || _MSC_VER >= 1800)
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#endif
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#ifndef FMT_USE_RVALUE_REFERENCES
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// Don't use rvalue references when compiling with clang and an old libstdc++
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// as the latter doesn't provide std::move.
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# if defined(FMT_GNUC_LIBSTD_VERSION) && FMT_GNUC_LIBSTD_VERSION <= 402
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# define FMT_USE_RVALUE_REFERENCES 0
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# else
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# define FMT_USE_RVALUE_REFERENCES \
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(FMT_HAS_FEATURE(cxx_rvalue_references) || \
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(FMT_GCC_VERSION >= 403 && __cplusplus >= 201103) || _MSC_VER >= 1600)
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# endif
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#endif
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#if FMT_USE_RVALUE_REFERENCES
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# include <utility> // for std::move
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#endif
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// Define FMT_USE_NOEXCEPT to make C++ Format use noexcept (C++11 feature).
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#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
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(FMT_GCC_VERSION >= 408 && __cplusplus >= 201103)
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# define FMT_NOEXCEPT(expr) noexcept(expr)
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#else
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# define FMT_NOEXCEPT(expr)
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#endif
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// A macro to disallow the copy constructor and operator= functions
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// This should be used in the private: declarations for a class
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#define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
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TypeName(const TypeName&); \
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void operator=(const TypeName&)
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namespace fmt {
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// Fix the warning about long long on older versions of GCC
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// that don't support the diagnostic pragma.
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FMT_GCC_EXTENSION typedef long long LongLong;
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FMT_GCC_EXTENSION typedef unsigned long long ULongLong;
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#if FMT_USE_RVALUE_REFERENCES
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using std::move;
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#endif
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template <typename Char>
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class BasicWriter;
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typedef BasicWriter<char> Writer;
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typedef BasicWriter<wchar_t> WWriter;
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struct FormatSpec;
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/**
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\rst
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A string reference. It can be constructed from a C string or
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``std::string``.
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You can use one of the following typedefs for common character types:
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+------------+-------------------------+
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| Type | Definition |
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+============+=========================+
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| StringRef | BasicStringRef<char> |
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+------------+-------------------------+
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| WStringRef | BasicStringRef<wchar_t> |
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+------------+-------------------------+
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This class is most useful as a parameter type to allow passing
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different types of strings to a function, for example::
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template<typename... Args>
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std::string format(StringRef format, const Args & ... args);
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format("{}", 42);
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format(std::string("{}"), 42);
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\endrst
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*/
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template <typename Char>
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class BasicStringRef {
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private:
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const Char *data_;
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mutable std::size_t size_;
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public:
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/**
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Constructs a string reference object from a C string and a size.
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If *size* is zero, which is the default, the size is computed
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automatically.
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*/
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BasicStringRef(const Char *s, std::size_t size = 0) : data_(s), size_(size) {}
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/**
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Constructs a string reference from an `std::string` object.
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*/
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BasicStringRef(const std::basic_string<Char> &s)
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: data_(s.c_str()), size_(s.size()) {}
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/**
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Converts a string reference to an `std::string` object.
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*/
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operator std::basic_string<Char>() const {
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return std::basic_string<Char>(data_, size());
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}
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/**
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Returns the pointer to a C string.
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*/
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const Char *c_str() const { return data_; }
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/**
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Returns the string size.
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*/
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std::size_t size() const {
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if (size_ == 0 && data_) size_ = std::char_traits<Char>::length(data_);
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return size_;
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}
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friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) {
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return lhs.data_ == rhs.data_;
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}
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friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) {
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return lhs.data_ != rhs.data_;
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}
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};
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typedef BasicStringRef<char> StringRef;
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typedef BasicStringRef<wchar_t> WStringRef;
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/**
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A formatting error such as invalid format string.
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*/
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class FormatError : public std::runtime_error {
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public:
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explicit FormatError(const std::string &message)
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: std::runtime_error(message) {}
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};
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namespace internal {
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// The number of characters to store in the Array object, representing the
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// output buffer, itself to avoid dynamic memory allocation.
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enum { INLINE_BUFFER_SIZE = 500 };
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#if _SECURE_SCL
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// Use checked iterator to avoid warnings on MSVC.
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template <typename T>
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inline stdext::checked_array_iterator<T*> CheckPtr(T *ptr, std::size_t size) {
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return stdext::checked_array_iterator<T*>(ptr, size);
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}
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#else
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template <typename T>
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inline T *CheckPtr(T *ptr, std::size_t) { return ptr; }
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#endif
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// A simple array for POD types with the first SIZE elements stored in
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// the object itself. It supports a subset of std::vector's operations.
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template <typename T, std::size_t SIZE>
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class Array {
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private:
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std::size_t size_;
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std::size_t capacity_;
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T *ptr_;
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T data_[SIZE];
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void grow(std::size_t size);
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// Free memory allocated by the array.
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void free() {
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if (ptr_ != data_) delete [] ptr_;
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}
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// Move data from other to this array.
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void move(Array &other) {
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size_ = other.size_;
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capacity_ = other.capacity_;
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if (other.ptr_ == other.data_) {
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ptr_ = data_;
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std::copy(other.data_, other.data_ + size_, CheckPtr(data_, capacity_));
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} else {
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ptr_ = other.ptr_;
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// Set pointer to the inline array so that delete is not called
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// when freeing.
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other.ptr_ = other.data_;
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}
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}
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FMT_DISALLOW_COPY_AND_ASSIGN(Array);
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public:
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Array() : size_(0), capacity_(SIZE), ptr_(data_) {}
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~Array() { free(); }
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#if FMT_USE_RVALUE_REFERENCES
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Array(Array &&other) {
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move(other);
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}
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Array& operator=(Array &&other) {
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assert(this != &other);
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free();
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move(other);
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return *this;
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}
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#endif
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// Returns the size of this array.
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std::size_t size() const { return size_; }
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// Returns the capacity of this array.
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std::size_t capacity() const { return capacity_; }
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// Resizes the array. If T is a POD type new elements are not initialized.
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void resize(std::size_t new_size) {
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if (new_size > capacity_)
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grow(new_size);
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size_ = new_size;
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}
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// Reserves space to store at least capacity elements.
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void reserve(std::size_t capacity) {
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if (capacity > capacity_)
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grow(capacity);
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}
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void clear() { size_ = 0; }
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void push_back(const T &value) {
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if (size_ == capacity_)
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grow(size_ + 1);
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ptr_[size_++] = value;
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}
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// Appends data to the end of the array.
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void append(const T *begin, const T *end);
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T &operator[](std::size_t index) { return ptr_[index]; }
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const T &operator[](std::size_t index) const { return ptr_[index]; }
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};
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template <typename T, std::size_t SIZE>
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void Array<T, SIZE>::grow(std::size_t size) {
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capacity_ = (std::max)(size, capacity_ + capacity_ / 2);
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T *p = new T[capacity_];
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std::copy(ptr_, ptr_ + size_, CheckPtr(p, capacity_));
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if (ptr_ != data_)
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delete [] ptr_;
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ptr_ = p;
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}
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template <typename T, std::size_t SIZE>
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void Array<T, SIZE>::append(const T *begin, const T *end) {
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std::ptrdiff_t num_elements = end - begin;
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if (size_ + num_elements > capacity_)
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grow(size_ + num_elements);
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std::copy(begin, end, CheckPtr(ptr_, capacity_) + size_);
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size_ += num_elements;
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}
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template <typename Char>
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struct StringValue {
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const Char *value;
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std::size_t size;
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};
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template <typename Char>
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class BasicCharTraits {
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public:
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#if _SECURE_SCL
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typedef stdext::checked_array_iterator<Char*> CharPtr;
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#else
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typedef Char *CharPtr;
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#endif
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};
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template <typename Char>
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class CharTraits;
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template <>
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class CharTraits<char> : public BasicCharTraits<char> {
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private:
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// Conversion from wchar_t to char is not allowed.
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static char ConvertChar(wchar_t);
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public:
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typedef const wchar_t *UnsupportedStrType;
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static char ConvertChar(char value) { return value; }
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static StringValue<char> convert(StringValue<wchar_t>) {
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StringValue<char> s = {"", 0};
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return s;
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}
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template <typename T>
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static int FormatFloat(char *buffer, std::size_t size,
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const char *format, unsigned width, int precision, T value);
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};
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template <>
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class CharTraits<wchar_t> : public BasicCharTraits<wchar_t> {
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public:
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typedef const char *UnsupportedStrType;
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static wchar_t ConvertChar(char value) { return value; }
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static wchar_t ConvertChar(wchar_t value) { return value; }
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static StringValue<wchar_t> convert(StringValue<wchar_t> s) { return s; }
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template <typename T>
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static int FormatFloat(wchar_t *buffer, std::size_t size,
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const wchar_t *format, unsigned width, int precision, T value);
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};
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// Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise.
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template <bool FitsIn32Bits>
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struct TypeSelector { typedef uint32_t Type; };
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template <>
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struct TypeSelector<false> { typedef uint64_t Type; };
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// Checks if a number is negative - used to avoid warnings.
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template <bool IsSigned>
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struct SignChecker {
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template <typename T>
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static bool IsNegative(T) { return false; }
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};
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template <>
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struct SignChecker<true> {
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template <typename T>
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static bool IsNegative(T value) { return value < 0; }
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};
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// Returns true if value is negative, false otherwise.
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// Same as (value < 0) but doesn't produce warnings if T is an unsigned type.
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template <typename T>
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inline bool IsNegative(T value) {
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return SignChecker<std::numeric_limits<T>::is_signed>::IsNegative(value);
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}
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int SignBitNoInline(double value);
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template <typename T>
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struct IntTraits {
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// Smallest of uint32_t and uint64_t that is large enough to represent
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// all values of T.
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typedef typename
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TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType;
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};
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template <typename T>
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struct IsLongDouble { enum {VALUE = 0}; };
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template <>
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struct IsLongDouble<long double> { enum {VALUE = 1}; };
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void ReportUnknownType(char code, const char *type);
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extern const uint32_t POWERS_OF_10_32[];
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extern const uint64_t POWERS_OF_10_64[];
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#if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
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// Returns the number of decimal digits in n. Leading zeros are not counted
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// except for n == 0 in which case CountDigits returns 1.
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inline unsigned CountDigits(uint64_t n) {
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// Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
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// and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
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uint64_t t = (64 - __builtin_clzll(n | 1)) * 1233 >> 12;
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return t - (n < POWERS_OF_10_64[t]) + 1;
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}
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# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
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// Optional version of CountDigits for better performance on 32-bit platforms.
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inline unsigned CountDigits(uint32_t n) {
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uint32_t t = (32 - __builtin_clz(n | 1)) * 1233 >> 12;
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return t - (n < POWERS_OF_10_32[t]) + 1;
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}
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# endif
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#else
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// Slower version of CountDigits used when __builtin_clz is not available.
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inline unsigned CountDigits(uint64_t n) {
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unsigned count = 1;
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for (;;) {
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// Integer division is slow so do it for a group of four digits instead
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// of for every digit. The idea comes from the talk by Alexandrescu
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// "Three Optimization Tips for C++". See speed-test for a comparison.
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if (n < 10) return count;
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if (n < 100) return count + 1;
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if (n < 1000) return count + 2;
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if (n < 10000) return count + 3;
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n /= 10000u;
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count += 4;
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}
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}
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#endif
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extern const char DIGITS[];
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// Formats a decimal unsigned integer value writing into buffer.
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template <typename UInt, typename Char>
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void FormatDecimal(Char *buffer, UInt value, unsigned num_digits) {
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--num_digits;
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while (value >= 100) {
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// Integer division is slow so do it for a group of two digits instead
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// of for every digit. The idea comes from the talk by Alexandrescu
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// "Three Optimization Tips for C++". See speed-test for a comparison.
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unsigned index = (value % 100) * 2;
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value /= 100;
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buffer[num_digits] = DIGITS[index + 1];
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buffer[num_digits - 1] = DIGITS[index];
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num_digits -= 2;
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}
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if (value < 10) {
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*buffer = static_cast<char>('0' + value);
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return;
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}
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unsigned index = static_cast<unsigned>(value * 2);
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buffer[1] = DIGITS[index + 1];
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buffer[0] = DIGITS[index];
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}
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template <typename Char, typename T>
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void FormatCustomArg(void *writer, const void *arg, const FormatSpec &spec);
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#ifdef _WIN32
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// A converter from UTF-8 to UTF-16.
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// It is only provided for Windows since other systems use UTF-8.
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class UTF8ToUTF16 {
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private:
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Array<wchar_t, INLINE_BUFFER_SIZE> buffer_;
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|
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public:
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explicit UTF8ToUTF16(StringRef s);
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operator WStringRef() const { return WStringRef(&buffer_[0], size()); }
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size_t size() const { return buffer_.size() - 1; }
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std::wstring str() const { return std::wstring(&buffer_[0], size()); }
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};
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|
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// A converter from UTF-16 to UTF-8.
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// It is only provided for Windows since other systems use UTF-8.
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class UTF16ToUTF8 {
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private:
|
|
Array<char, INLINE_BUFFER_SIZE> buffer_;
|
|
|
|
public:
|
|
UTF16ToUTF8() {}
|
|
explicit UTF16ToUTF8(WStringRef s);
|
|
operator StringRef() const { return StringRef(&buffer_[0], size()); }
|
|
size_t size() const { return buffer_.size() - 1; }
|
|
std::string str() const { return std::string(&buffer_[0], size()); }
|
|
|
|
// Performs conversion returning a system error code instead of
|
|
// throwing exception on error.
|
|
int Convert(WStringRef s);
|
|
};
|
|
#endif
|
|
|
|
// Portable thread-safe version of strerror.
|
|
// Sets buffer to point to a string describing the error code.
|
|
// This can be either a pointer to a string stored in buffer,
|
|
// or a pointer to some static immutable string.
|
|
// Returns one of the following values:
|
|
// 0 - success
|
|
// ERANGE - buffer is not large enough to store the error message
|
|
// other - failure
|
|
// Buffer should be at least of size 1.
|
|
int StrError(int error_code,
|
|
char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT(true);
|
|
|
|
void FormatSystemErrorMessage(
|
|
fmt::Writer &out, int error_code, fmt::StringRef message);
|
|
|
|
#ifdef _WIN32
|
|
void FormatWinErrorMessage(
|
|
fmt::Writer &out, int error_code, fmt::StringRef message);
|
|
#endif
|
|
|
|
struct SimpleErrorReporter {
|
|
void operator()(const void *, fmt::StringRef message) const {
|
|
throw fmt::FormatError(message);
|
|
}
|
|
};
|
|
|
|
// Throws Exception(message) if format contains '}', otherwise throws
|
|
// FormatError reporting unmatched '{'. The idea is that unmatched '{'
|
|
// should override other errors.
|
|
template <typename Char>
|
|
struct FormatErrorReporter {
|
|
int num_open_braces;
|
|
void operator()(const Char *s, fmt::StringRef message) const;
|
|
};
|
|
|
|
// Computes max(Arg, 1) at compile time. It is used to avoid errors about
|
|
// allocating an array of 0 size.
|
|
template <unsigned Arg>
|
|
struct NonZero {
|
|
enum { VALUE = Arg };
|
|
};
|
|
|
|
template <>
|
|
struct NonZero<0> {
|
|
enum { VALUE = 1 };
|
|
};
|
|
|
|
// A formatting argument. It is a POD type to allow storage in internal::Array.
|
|
struct Arg {
|
|
enum Type {
|
|
// Integer types should go first,
|
|
INT, UINT, LONG_LONG, ULONG_LONG, LAST_INTEGER_TYPE = ULONG_LONG,
|
|
// followed by floating-point types.
|
|
DOUBLE, LONG_DOUBLE, LAST_NUMERIC_TYPE = LONG_DOUBLE,
|
|
CHAR, STRING, WSTRING, POINTER, CUSTOM
|
|
};
|
|
Type type;
|
|
|
|
typedef void (*FormatFunc)(
|
|
void *writer, const void *arg, const FormatSpec &spec);
|
|
|
|
struct CustomValue {
|
|
const void *value;
|
|
FormatFunc format;
|
|
};
|
|
|
|
union {
|
|
int int_value;
|
|
unsigned uint_value;
|
|
LongLong long_long_value;
|
|
ULongLong ulong_long_value;
|
|
double double_value;
|
|
long double long_double_value;
|
|
const void *pointer_value;
|
|
StringValue<char> string;
|
|
StringValue<wchar_t> wstring;
|
|
CustomValue custom;
|
|
};
|
|
};
|
|
|
|
// Makes an Arg object from any type.
|
|
template <typename Char>
|
|
class MakeArg : public Arg {
|
|
private:
|
|
// The following two methods are private to disallow formatting of
|
|
// arbitrary pointers. If you want to output a pointer cast it to
|
|
// "void *" or "const void *". In particular, this forbids formatting
|
|
// of "[const] volatile char *" which is printed as bool by iostreams.
|
|
// Do not implement!
|
|
template <typename T>
|
|
MakeArg(const T *value);
|
|
template <typename T>
|
|
MakeArg(T *value);
|
|
|
|
void SetString(StringRef str) {
|
|
type = STRING;
|
|
string.value = str.c_str();
|
|
string.size = str.size();
|
|
}
|
|
|
|
void SetString(WStringRef str) {
|
|
type = WSTRING;
|
|
wstring.value = str.c_str();
|
|
wstring.size = str.size();
|
|
}
|
|
|
|
public:
|
|
MakeArg() {}
|
|
MakeArg(bool value) { type = INT; int_value = value; }
|
|
MakeArg(short value) { type = INT; int_value = value; }
|
|
MakeArg(unsigned short value) { type = UINT; uint_value = value; }
|
|
MakeArg(int value) { type = INT; int_value = value; }
|
|
MakeArg(unsigned value) { type = UINT; uint_value = value; }
|
|
MakeArg(long value) {
|
|
// To minimize the number of types we need to deal with, long is
|
|
// translated either to int or to long long depending on its size.
|
|
if (sizeof(long) == sizeof(int)) {
|
|
type = INT;
|
|
int_value = static_cast<int>(value);
|
|
} else {
|
|
type = LONG_LONG;
|
|
long_long_value = value;
|
|
}
|
|
}
|
|
MakeArg(unsigned long value) {
|
|
if (sizeof(unsigned long) == sizeof(unsigned)) {
|
|
type = UINT;
|
|
uint_value = static_cast<unsigned>(value);
|
|
} else {
|
|
type = ULONG_LONG;
|
|
ulong_long_value = value;
|
|
}
|
|
}
|
|
MakeArg(LongLong value) { type = LONG_LONG; long_long_value = value; }
|
|
MakeArg(ULongLong value) { type = ULONG_LONG; ulong_long_value = value; }
|
|
MakeArg(float value) { type = DOUBLE; double_value = value; }
|
|
MakeArg(double value) { type = DOUBLE; double_value = value; }
|
|
MakeArg(long double value) { type = LONG_DOUBLE; long_double_value = value; }
|
|
MakeArg(signed char value) { type = CHAR; int_value = value; }
|
|
MakeArg(unsigned char value) { type = CHAR; int_value = value; }
|
|
MakeArg(char value) { type = CHAR; int_value = value; }
|
|
MakeArg(wchar_t value) {
|
|
type = CHAR;
|
|
int_value = internal::CharTraits<Char>::ConvertChar(value);
|
|
}
|
|
|
|
MakeArg(char *value) { SetString(value); }
|
|
MakeArg(const char *value) { SetString(value); }
|
|
MakeArg(const std::string &value) { SetString(value); }
|
|
MakeArg(StringRef value) { SetString(value); }
|
|
|
|
MakeArg(wchar_t *value) { SetString(value); }
|
|
MakeArg(const wchar_t *value) { SetString(value); }
|
|
MakeArg(const std::wstring &value) { SetString(value); }
|
|
MakeArg(WStringRef value) { SetString(value); }
|
|
|
|
MakeArg(void *value) { type = POINTER; pointer_value = value; }
|
|
MakeArg(const void *value) { type = POINTER; pointer_value = value; }
|
|
|
|
template <typename T>
|
|
MakeArg(const T &value) {
|
|
type = CUSTOM;
|
|
custom.value = &value;
|
|
custom.format = &internal::FormatCustomArg<Char, T>;
|
|
}
|
|
};
|
|
|
|
class RuntimeError : public std::runtime_error {
|
|
protected:
|
|
RuntimeError() : std::runtime_error("") {}
|
|
};
|
|
} // namespace internal
|
|
|
|
/**
|
|
An argument list.
|
|
*/
|
|
class ArgList {
|
|
private:
|
|
const internal::Arg *args_;
|
|
std::size_t size_;
|
|
|
|
public:
|
|
ArgList() : size_(0) {}
|
|
ArgList(const internal::Arg *args, std::size_t size)
|
|
: args_(args), size_(size) {}
|
|
|
|
/**
|
|
Returns the list size (the number of arguments).
|
|
*/
|
|
std::size_t size() const { return size_; }
|
|
|
|
/**
|
|
Returns the argument at specified index.
|
|
*/
|
|
const internal::Arg &operator[](std::size_t index) const {
|
|
return args_[index];
|
|
}
|
|
};
|
|
|
|
namespace internal {
|
|
// Printf format string parser.
|
|
template <typename Char>
|
|
class PrintfParser {
|
|
private:
|
|
ArgList args_;
|
|
int next_arg_index_;
|
|
|
|
void ParseFlags(FormatSpec &spec, const Char *&s);
|
|
|
|
// Parses argument index, flags and width and returns the parsed
|
|
// argument index.
|
|
unsigned ParseHeader(const Char *&s, FormatSpec &spec, const char *&error);
|
|
|
|
const internal::Arg &HandleArgIndex(unsigned arg_index, const char *&error);
|
|
|
|
public:
|
|
void Format(BasicWriter<Char> &writer,
|
|
BasicStringRef<Char> format, const ArgList &args);
|
|
};
|
|
} // namespace internal
|
|
|
|
enum Alignment {
|
|
ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
|
|
};
|
|
|
|
// Flags.
|
|
enum { SIGN_FLAG = 1, PLUS_FLAG = 2, HASH_FLAG = 4 };
|
|
|
|
// An empty format specifier.
|
|
struct EmptySpec {};
|
|
|
|
// A type specifier.
|
|
template <char TYPE>
|
|
struct TypeSpec : EmptySpec {
|
|
Alignment align() const { return ALIGN_DEFAULT; }
|
|
unsigned width() const { return 0; }
|
|
int precision() const { return -1; }
|
|
|
|
bool sign_flag() const { return false; }
|
|
bool plus_flag() const { return false; }
|
|
bool hash_flag() const { return false; }
|
|
|
|
char type() const { return TYPE; }
|
|
char fill() const { return ' '; }
|
|
};
|
|
|
|
// A width specifier.
|
|
struct WidthSpec {
|
|
unsigned width_;
|
|
// Fill is always wchar_t and cast to char if necessary to avoid having
|
|
// two specialization of WidthSpec and its subclasses.
|
|
wchar_t fill_;
|
|
|
|
WidthSpec(unsigned width, wchar_t fill) : width_(width), fill_(fill) {}
|
|
|
|
unsigned width() const { return width_; }
|
|
wchar_t fill() const { return fill_; }
|
|
};
|
|
|
|
// An alignment specifier.
|
|
struct AlignSpec : WidthSpec {
|
|
Alignment align_;
|
|
|
|
AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT)
|
|
: WidthSpec(width, fill), align_(align) {}
|
|
|
|
Alignment align() const { return align_; }
|
|
|
|
int precision() const { return -1; }
|
|
};
|
|
|
|
// An alignment and type specifier.
|
|
template <char TYPE>
|
|
struct AlignTypeSpec : AlignSpec {
|
|
AlignTypeSpec(unsigned width, wchar_t fill) : AlignSpec(width, fill) {}
|
|
|
|
bool sign_flag() const { return false; }
|
|
bool plus_flag() const { return false; }
|
|
bool hash_flag() const { return false; }
|
|
|
|
char type() const { return TYPE; }
|
|
};
|
|
|
|
// A full format specifier.
|
|
struct FormatSpec : AlignSpec {
|
|
unsigned flags_;
|
|
int precision_;
|
|
char type_;
|
|
|
|
FormatSpec(
|
|
unsigned width = 0, char type = 0, wchar_t fill = ' ')
|
|
: AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) {}
|
|
|
|
bool sign_flag() const { return (flags_ & SIGN_FLAG) != 0; }
|
|
bool plus_flag() const { return (flags_ & PLUS_FLAG) != 0; }
|
|
bool hash_flag() const { return (flags_ & HASH_FLAG) != 0; }
|
|
|
|
int precision() const { return precision_; }
|
|
|
|
char type() const { return type_; }
|
|
};
|
|
|
|
// An integer format specifier.
|
|
template <typename T, typename SpecT = TypeSpec<0>, typename Char = char>
|
|
class IntFormatSpec : public SpecT {
|
|
private:
|
|
T value_;
|
|
|
|
public:
|
|
IntFormatSpec(T value, const SpecT &spec = SpecT())
|
|
: SpecT(spec), value_(value) {}
|
|
|
|
T value() const { return value_; }
|
|
};
|
|
|
|
// A string format specifier.
|
|
template <typename T>
|
|
class StrFormatSpec : public AlignSpec {
|
|
private:
|
|
const T *str_;
|
|
|
|
public:
|
|
StrFormatSpec(const T *str, unsigned width, wchar_t fill)
|
|
: AlignSpec(width, fill), str_(str) {}
|
|
|
|
const T *str() const { return str_; }
|
|
};
|
|
|
|
/**
|
|
Returns an integer format specifier to format the value in base 2.
|
|
*/
|
|
IntFormatSpec<int, TypeSpec<'b'> > bin(int value);
|
|
|
|
/**
|
|
Returns an integer format specifier to format the value in base 8.
|
|
*/
|
|
IntFormatSpec<int, TypeSpec<'o'> > oct(int value);
|
|
|
|
/**
|
|
Returns an integer format specifier to format the value in base 16 using
|
|
lower-case letters for the digits above 9.
|
|
*/
|
|
IntFormatSpec<int, TypeSpec<'x'> > hex(int value);
|
|
|
|
/**
|
|
Returns an integer formatter format specifier to format in base 16 using
|
|
upper-case letters for the digits above 9.
|
|
*/
|
|
IntFormatSpec<int, TypeSpec<'X'> > hexu(int value);
|
|
|
|
/**
|
|
\rst
|
|
Returns an integer format specifier to pad the formatted argument with the
|
|
fill character to the specified width using the default (right) numeric
|
|
alignment.
|
|
|
|
**Example**::
|
|
|
|
Writer out;
|
|
out << pad(hex(0xcafe), 8, '0');
|
|
// out.str() == "0000cafe"
|
|
|
|
\endrst
|
|
*/
|
|
template <char TYPE_CODE, typename Char>
|
|
IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad(
|
|
int value, unsigned width, Char fill = ' ');
|
|
|
|
#define FMT_DEFINE_INT_FORMATTERS(TYPE) \
|
|
inline IntFormatSpec<TYPE, TypeSpec<'b'> > bin(TYPE value) { \
|
|
return IntFormatSpec<TYPE, TypeSpec<'b'> >(value, TypeSpec<'b'>()); \
|
|
} \
|
|
\
|
|
inline IntFormatSpec<TYPE, TypeSpec<'o'> > oct(TYPE value) { \
|
|
return IntFormatSpec<TYPE, TypeSpec<'o'> >(value, TypeSpec<'o'>()); \
|
|
} \
|
|
\
|
|
inline IntFormatSpec<TYPE, TypeSpec<'x'> > hex(TYPE value) { \
|
|
return IntFormatSpec<TYPE, TypeSpec<'x'> >(value, TypeSpec<'x'>()); \
|
|
} \
|
|
\
|
|
inline IntFormatSpec<TYPE, TypeSpec<'X'> > hexu(TYPE value) { \
|
|
return IntFormatSpec<TYPE, TypeSpec<'X'> >(value, TypeSpec<'X'>()); \
|
|
} \
|
|
\
|
|
template <char TYPE_CODE> \
|
|
inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> > pad( \
|
|
IntFormatSpec<TYPE, TypeSpec<TYPE_CODE> > f, unsigned width) { \
|
|
return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> >( \
|
|
f.value(), AlignTypeSpec<TYPE_CODE>(width, ' ')); \
|
|
} \
|
|
\
|
|
/* For compatibility with older compilers we provide two overloads for pad, */ \
|
|
/* one that takes a fill character and one that doesn't. In the future this */ \
|
|
/* can be replaced with one overload making the template argument Char */ \
|
|
/* default to char (C++11). */ \
|
|
template <char TYPE_CODE, typename Char> \
|
|
inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char> pad( \
|
|
IntFormatSpec<TYPE, TypeSpec<TYPE_CODE>, Char> f, \
|
|
unsigned width, Char fill) { \
|
|
return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char>( \
|
|
f.value(), AlignTypeSpec<TYPE_CODE>(width, fill)); \
|
|
} \
|
|
\
|
|
inline IntFormatSpec<TYPE, AlignTypeSpec<0> > pad( \
|
|
TYPE value, unsigned width) { \
|
|
return IntFormatSpec<TYPE, AlignTypeSpec<0> >( \
|
|
value, AlignTypeSpec<0>(width, ' ')); \
|
|
} \
|
|
\
|
|
template <typename Char> \
|
|
inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \
|
|
TYPE value, unsigned width, Char fill) { \
|
|
return IntFormatSpec<TYPE, AlignTypeSpec<0>, Char>( \
|
|
value, AlignTypeSpec<0>(width, fill)); \
|
|
}
|
|
|
|
FMT_DEFINE_INT_FORMATTERS(int)
|
|
FMT_DEFINE_INT_FORMATTERS(long)
|
|
FMT_DEFINE_INT_FORMATTERS(unsigned)
|
|
FMT_DEFINE_INT_FORMATTERS(unsigned long)
|
|
FMT_DEFINE_INT_FORMATTERS(LongLong)
|
|
FMT_DEFINE_INT_FORMATTERS(ULongLong)
|
|
|
|
/**
|
|
\rst
|
|
Returns a string formatter that pads the formatted argument with the fill
|
|
character to the specified width using the default (left) string alignment.
|
|
|
|
**Example**::
|
|
|
|
std::string s = str(Writer() << pad("abc", 8));
|
|
// s == "abc "
|
|
|
|
\endrst
|
|
*/
|
|
template <typename Char>
|
|
inline StrFormatSpec<Char> pad(
|
|
const Char *str, unsigned width, Char fill = ' ') {
|
|
return StrFormatSpec<Char>(str, width, fill);
|
|
}
|
|
|
|
inline StrFormatSpec<wchar_t> pad(
|
|
const wchar_t *str, unsigned width, char fill = ' ') {
|
|
return StrFormatSpec<wchar_t>(str, width, fill);
|
|
}
|
|
|
|
// Generates a comma-separated list with results of applying f to numbers 0..n-1.
|
|
# define FMT_GEN(n, f) FMT_GEN##n(f)
|
|
# define FMT_GEN1(f) f(0)
|
|
# define FMT_GEN2(f) FMT_GEN1(f), f(1)
|
|
# define FMT_GEN3(f) FMT_GEN2(f), f(2)
|
|
# define FMT_GEN4(f) FMT_GEN3(f), f(3)
|
|
# define FMT_GEN5(f) FMT_GEN4(f), f(4)
|
|
# define FMT_GEN6(f) FMT_GEN5(f), f(5)
|
|
# define FMT_GEN7(f) FMT_GEN6(f), f(6)
|
|
# define FMT_GEN8(f) FMT_GEN7(f), f(7)
|
|
# define FMT_GEN9(f) FMT_GEN8(f), f(8)
|
|
# define FMT_GEN10(f) FMT_GEN9(f), f(9)
|
|
|
|
# define FMT_MAKE_TEMPLATE_ARG(n) typename T##n
|
|
# define FMT_MAKE_ARG(n) const T##n &v##n
|
|
# define FMT_MAKE_REF_char(n) fmt::internal::MakeArg<char>(v##n)
|
|
# define FMT_MAKE_REF_wchar_t(n) fmt::internal::MakeArg<wchar_t>(v##n)
|
|
|
|
#if FMT_USE_VARIADIC_TEMPLATES
|
|
// Defines a variadic function returning void.
|
|
# define FMT_VARIADIC_VOID(func, arg_type) \
|
|
template<typename... Args> \
|
|
void func(arg_type arg1, const Args & ... args) { \
|
|
using fmt::internal::Arg; \
|
|
const Arg arg_array[fmt::internal::NonZero<sizeof...(Args)>::VALUE] = { \
|
|
fmt::internal::MakeArg<Char>(args)... \
|
|
}; \
|
|
func(arg1, ArgList(arg_array, sizeof...(Args))); \
|
|
}
|
|
|
|
// Defines a variadic constructor.
|
|
# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
|
|
template<typename... Args> \
|
|
ctor(arg0_type arg0, arg1_type arg1, const Args & ... args) { \
|
|
using fmt::internal::Arg; \
|
|
const Arg arg_array[fmt::internal::NonZero<sizeof...(Args)>::VALUE] = { \
|
|
fmt::internal::MakeArg<Char>(args)... \
|
|
}; \
|
|
func(arg0, arg1, ArgList(arg_array, sizeof...(Args))); \
|
|
}
|
|
|
|
#else
|
|
|
|
# define FMT_MAKE_REF(n) fmt::internal::MakeArg<Char>(v##n)
|
|
// Defines a wrapper for a function taking one argument of type arg_type
|
|
// and n additional arguments of arbitrary types.
|
|
# define FMT_WRAP1(func, arg_type, n) \
|
|
template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
|
|
inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
|
|
const fmt::internal::Arg args[] = {FMT_GEN(n, FMT_MAKE_REF)}; \
|
|
func(arg1, fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
|
|
}
|
|
|
|
// Emulates a variadic function returning void on a pre-C++11 compiler.
|
|
# define FMT_VARIADIC_VOID(func, arg_type) \
|
|
FMT_WRAP1(func, arg_type, 1) FMT_WRAP1(func, arg_type, 2) \
|
|
FMT_WRAP1(func, arg_type, 3) FMT_WRAP1(func, arg_type, 4) \
|
|
FMT_WRAP1(func, arg_type, 5) FMT_WRAP1(func, arg_type, 6) \
|
|
FMT_WRAP1(func, arg_type, 7) FMT_WRAP1(func, arg_type, 8) \
|
|
FMT_WRAP1(func, arg_type, 9) FMT_WRAP1(func, arg_type, 10)
|
|
|
|
# define FMT_CTOR(ctor, func, arg0_type, arg1_type, n) \
|
|
template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
|
|
ctor(arg0_type arg0, arg1_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
|
|
const fmt::internal::Arg args[] = {FMT_GEN(n, FMT_MAKE_REF)}; \
|
|
func(arg0, arg1, fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
|
|
}
|
|
|
|
// Emulates a variadic constructor on a pre-C++11 compiler.
|
|
# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 1) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 2) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 3) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 4) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 5) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 6) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 7) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 8) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 9) \
|
|
FMT_CTOR(ctor, func, arg0_type, arg1_type, 10)
|
|
#endif
|
|
|
|
// Generates a comma-separated list with results of applying f to pairs
|
|
// (argument, index).
|
|
#define FMT_FOR_EACH1(f, x0) f(x0, 0)
|
|
#define FMT_FOR_EACH2(f, x0, x1) \
|
|
FMT_FOR_EACH1(f, x0), f(x1, 1)
|
|
#define FMT_FOR_EACH3(f, x0, x1, x2) \
|
|
FMT_FOR_EACH2(f, x0 ,x1), f(x2, 2)
|
|
#define FMT_FOR_EACH4(f, x0, x1, x2, x3) \
|
|
FMT_FOR_EACH3(f, x0, x1, x2), f(x3, 3)
|
|
#define FMT_FOR_EACH5(f, x0, x1, x2, x3, x4) \
|
|
FMT_FOR_EACH4(f, x0, x1, x2, x3), f(x4, 4)
|
|
#define FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5) \
|
|
FMT_FOR_EACH5(f, x0, x1, x2, x3, x4), f(x5, 5)
|
|
#define FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6) \
|
|
FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5), f(x6, 6)
|
|
#define FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7) \
|
|
FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6), f(x7, 7)
|
|
#define FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8) \
|
|
FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7), f(x8, 8)
|
|
#define FMT_FOR_EACH10(f, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9) \
|
|
FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8), f(x9, 9)
|
|
|
|
/**
|
|
An error returned by an operating system or a language runtime,
|
|
for example a file opening error.
|
|
*/
|
|
class SystemError : public internal::RuntimeError {
|
|
private:
|
|
void init(int error_code, StringRef format_str, const ArgList &args);
|
|
|
|
protected:
|
|
int error_code_;
|
|
|
|
typedef char Char; // For FMT_VARIADIC_CTOR.
|
|
|
|
SystemError() {}
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :cpp:class:`fmt::SystemError` object with the description
|
|
of the form "*<message>*: *<system-message>*", where *<message>* is the
|
|
formatted message and *<system-message>* is the system message corresponding
|
|
to the error code.
|
|
*error_code* is a system error code as given by ``errno``.
|
|
\endrst
|
|
*/
|
|
SystemError(int error_code, StringRef message) {
|
|
init(error_code, message, ArgList());
|
|
}
|
|
FMT_VARIADIC_CTOR(SystemError, init, int, StringRef)
|
|
|
|
int error_code() const { return error_code_; }
|
|
};
|
|
|
|
/**
|
|
\rst
|
|
This template provides operations for formatting and writing data into
|
|
a character stream. The output is stored in a memory buffer that grows
|
|
dynamically.
|
|
|
|
You can use one of the following typedefs for common character types:
|
|
|
|
+---------+----------------------+
|
|
| Type | Definition |
|
|
+=========+======================+
|
|
| Writer | BasicWriter<char> |
|
|
+---------+----------------------+
|
|
| WWriter | BasicWriter<wchar_t> |
|
|
+---------+----------------------+
|
|
|
|
**Example**::
|
|
|
|
Writer out;
|
|
out << "The answer is " << 42 << "\n";
|
|
out.write("({:+f}, {:+f})", -3.14, 3.14);
|
|
|
|
This will write the following output to the ``out`` object:
|
|
|
|
.. code-block:: none
|
|
|
|
The answer is 42
|
|
(-3.140000, +3.140000)
|
|
|
|
The output can be converted to an ``std::string`` with ``out.str()`` or
|
|
accessed as a C string with ``out.c_str()``.
|
|
\endrst
|
|
*/
|
|
template <typename Char>
|
|
class BasicWriter {
|
|
private:
|
|
// Output buffer.
|
|
mutable internal::Array<Char, internal::INLINE_BUFFER_SIZE> buffer_;
|
|
|
|
typedef typename internal::CharTraits<Char>::CharPtr CharPtr;
|
|
|
|
#if _SECURE_SCL
|
|
static Char *GetBase(CharPtr p) { return p.base(); }
|
|
#else
|
|
static Char *GetBase(Char *p) { return p; }
|
|
#endif
|
|
|
|
static CharPtr FillPadding(CharPtr buffer,
|
|
unsigned total_size, std::size_t content_size, wchar_t fill);
|
|
|
|
// Grows the buffer by n characters and returns a pointer to the newly
|
|
// allocated area.
|
|
CharPtr GrowBuffer(std::size_t n) {
|
|
std::size_t size = buffer_.size();
|
|
buffer_.resize(size + n);
|
|
return internal::CheckPtr(&buffer_[size], n);
|
|
}
|
|
|
|
// Prepare a buffer for integer formatting.
|
|
CharPtr PrepareBufferForInt(unsigned num_digits,
|
|
const EmptySpec &, const char *prefix, unsigned prefix_size) {
|
|
unsigned size = prefix_size + num_digits;
|
|
CharPtr p = GrowBuffer(size);
|
|
std::copy(prefix, prefix + prefix_size, p);
|
|
return p + size - 1;
|
|
}
|
|
|
|
template <typename Spec>
|
|
CharPtr PrepareBufferForInt(unsigned num_digits,
|
|
const Spec &spec, const char *prefix, unsigned prefix_size);
|
|
|
|
// Formats an integer.
|
|
template <typename T, typename Spec>
|
|
void FormatInt(T value, const Spec &spec);
|
|
|
|
// Formats a floating-point number (double or long double).
|
|
template <typename T>
|
|
void FormatDouble(T value, const FormatSpec &spec);
|
|
|
|
// Writes a formatted string.
|
|
template <typename StringChar>
|
|
CharPtr write_str(
|
|
const StringChar *s, std::size_t size, const AlignSpec &spec);
|
|
|
|
template <typename StringChar>
|
|
void write_str(
|
|
const internal::StringValue<StringChar> &str, const FormatSpec &spec);
|
|
|
|
// This method is private to disallow writing a wide string to a
|
|
// char stream and vice versa. If you want to print a wide string
|
|
// as a pointer as std::ostream does, cast it to const void*.
|
|
// Do not implement!
|
|
void operator<<(typename internal::CharTraits<Char>::UnsupportedStrType);
|
|
|
|
// Format string parser.
|
|
class FormatParser {
|
|
private:
|
|
ArgList args_;
|
|
int next_arg_index_;
|
|
fmt::internal::FormatErrorReporter<Char> report_error_;
|
|
|
|
// Parses argument index and returns an argument with this index.
|
|
const internal::Arg &ParseArgIndex(const Char *&s);
|
|
|
|
void CheckSign(const Char *&s, const internal::Arg &arg);
|
|
|
|
public:
|
|
void Format(BasicWriter<Char> &writer,
|
|
BasicStringRef<Char> format, const ArgList &args);
|
|
};
|
|
|
|
friend class internal::PrintfParser<Char>;
|
|
|
|
public:
|
|
/**
|
|
Constructs a ``BasicWriter`` object.
|
|
*/
|
|
BasicWriter() {}
|
|
|
|
#if FMT_USE_RVALUE_REFERENCES
|
|
/**
|
|
Constructs a ``BasicWriter`` object moving the content of the other
|
|
object to it.
|
|
*/
|
|
BasicWriter(BasicWriter &&other) : buffer_(std::move(other.buffer_)) {}
|
|
|
|
/**
|
|
Moves the content of the other ``BasicWriter`` object to this one.
|
|
*/
|
|
BasicWriter& operator=(BasicWriter &&other) {
|
|
assert(this != &other);
|
|
buffer_ = std::move(other.buffer_);
|
|
return *this;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
Returns the total number of characters written.
|
|
*/
|
|
std::size_t size() const { return buffer_.size(); }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content. No terminating null
|
|
character is appended.
|
|
*/
|
|
const Char *data() const { return &buffer_[0]; }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content with terminating null
|
|
character appended.
|
|
*/
|
|
const Char *c_str() const {
|
|
std::size_t size = buffer_.size();
|
|
buffer_.reserve(size + 1);
|
|
buffer_[size] = '\0';
|
|
return &buffer_[0];
|
|
}
|
|
|
|
/**
|
|
Returns the content of the output buffer as an `std::string`.
|
|
*/
|
|
std::basic_string<Char> str() const {
|
|
return std::basic_string<Char>(&buffer_[0], buffer_.size());
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Writes formatted data.
|
|
|
|
*args* is an argument list representing arbitrary arguments.
|
|
|
|
**Example**::
|
|
|
|
Writer out;
|
|
out.write("Current point:\n");
|
|
out.write("({:+f}, {:+f})", -3.14, 3.14);
|
|
|
|
This will write the following output to the ``out`` object:
|
|
|
|
.. code-block:: none
|
|
|
|
Current point:
|
|
(-3.140000, +3.140000)
|
|
|
|
The output can be accessed using :meth:`data`, :meth:`c_str` or :meth:`str`
|
|
methods.
|
|
|
|
See also `Format String Syntax`_.
|
|
\endrst
|
|
*/
|
|
inline void write(BasicStringRef<Char> format, const ArgList &args) {
|
|
FormatParser().Format(*this, format, args);
|
|
}
|
|
FMT_VARIADIC_VOID(write, fmt::BasicStringRef<Char>)
|
|
|
|
BasicWriter &operator<<(int value) {
|
|
return *this << IntFormatSpec<int>(value);
|
|
}
|
|
BasicWriter &operator<<(unsigned value) {
|
|
return *this << IntFormatSpec<unsigned>(value);
|
|
}
|
|
BasicWriter &operator<<(long value) {
|
|
return *this << IntFormatSpec<long>(value);
|
|
}
|
|
BasicWriter &operator<<(unsigned long value) {
|
|
return *this << IntFormatSpec<unsigned long>(value);
|
|
}
|
|
BasicWriter &operator<<(LongLong value) {
|
|
return *this << IntFormatSpec<LongLong>(value);
|
|
}
|
|
|
|
/**
|
|
Formats *value* and writes it to the stream.
|
|
*/
|
|
BasicWriter &operator<<(ULongLong value) {
|
|
return *this << IntFormatSpec<ULongLong>(value);
|
|
}
|
|
|
|
BasicWriter &operator<<(double value) {
|
|
FormatDouble(value, FormatSpec());
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
Formats *value* using the general format for floating-point numbers
|
|
(``'g'``) and writes it to the stream.
|
|
*/
|
|
BasicWriter &operator<<(long double value) {
|
|
FormatDouble(value, FormatSpec());
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
Writes a character to the stream.
|
|
*/
|
|
BasicWriter &operator<<(char value) {
|
|
*GrowBuffer(1) = value;
|
|
return *this;
|
|
}
|
|
|
|
BasicWriter &operator<<(wchar_t value) {
|
|
*GrowBuffer(1) = internal::CharTraits<Char>::ConvertChar(value);
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
Writes *value* to the stream.
|
|
*/
|
|
BasicWriter &operator<<(const fmt::BasicStringRef<Char> value) {
|
|
const Char *str = value.c_str();
|
|
std::size_t size = value.size();
|
|
std::copy(str, str + size, GrowBuffer(size));
|
|
return *this;
|
|
}
|
|
|
|
template <typename T, typename Spec, typename FillChar>
|
|
BasicWriter &operator<<(const IntFormatSpec<T, Spec, FillChar> &spec) {
|
|
internal::CharTraits<Char>::ConvertChar(FillChar());
|
|
FormatInt(spec.value(), spec);
|
|
return *this;
|
|
}
|
|
|
|
template <typename StringChar>
|
|
BasicWriter &operator<<(const StrFormatSpec<StringChar> &spec) {
|
|
const StringChar *s = spec.str();
|
|
write_str(s, std::char_traits<Char>::length(s), spec);
|
|
return *this;
|
|
}
|
|
|
|
void write_str(const std::basic_string<Char> &s, const FormatSpec &spec) {
|
|
write_str(s.data(), s.size(), spec);
|
|
}
|
|
|
|
void clear() { buffer_.clear(); }
|
|
};
|
|
|
|
template <typename Char>
|
|
template <typename StringChar>
|
|
typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str(
|
|
const StringChar *s, std::size_t size, const AlignSpec &spec) {
|
|
CharPtr out = CharPtr();
|
|
if (spec.width() > size) {
|
|
out = GrowBuffer(spec.width());
|
|
Char fill = static_cast<Char>(spec.fill());
|
|
if (spec.align() == ALIGN_RIGHT) {
|
|
std::fill_n(out, spec.width() - size, fill);
|
|
out += spec.width() - size;
|
|
} else if (spec.align() == ALIGN_CENTER) {
|
|
out = FillPadding(out, spec.width(), size, fill);
|
|
} else {
|
|
std::fill_n(out + size, spec.width() - size, fill);
|
|
}
|
|
} else {
|
|
out = GrowBuffer(size);
|
|
}
|
|
std::copy(s, s + size, out);
|
|
return out;
|
|
}
|
|
|
|
template <typename Char>
|
|
template <typename Spec>
|
|
typename fmt::BasicWriter<Char>::CharPtr
|
|
fmt::BasicWriter<Char>::PrepareBufferForInt(
|
|
unsigned num_digits, const Spec &spec,
|
|
const char *prefix, unsigned prefix_size) {
|
|
unsigned width = spec.width();
|
|
Alignment align = spec.align();
|
|
Char fill = static_cast<Char>(spec.fill());
|
|
if (spec.precision() > static_cast<int>(num_digits)) {
|
|
// Octal prefix '0' is counted as a digit, so ignore it if precision
|
|
// is specified.
|
|
if (prefix_size > 0 && prefix[prefix_size - 1] == '0')
|
|
--prefix_size;
|
|
unsigned number_size = prefix_size + spec.precision();
|
|
AlignSpec subspec(number_size, '0', ALIGN_NUMERIC);
|
|
if (number_size >= width)
|
|
return PrepareBufferForInt(num_digits, subspec, prefix, prefix_size);
|
|
buffer_.reserve(width);
|
|
unsigned fill_size = width - number_size;
|
|
if (align != ALIGN_LEFT) {
|
|
CharPtr p = GrowBuffer(fill_size);
|
|
std::fill(p, p + fill_size, fill);
|
|
}
|
|
CharPtr result = PrepareBufferForInt(num_digits, subspec, prefix, prefix_size);
|
|
if (align == ALIGN_LEFT) {
|
|
CharPtr p = GrowBuffer(fill_size);
|
|
std::fill(p, p + fill_size, fill);
|
|
}
|
|
return result;
|
|
}
|
|
unsigned size = prefix_size + num_digits;
|
|
if (width <= size) {
|
|
CharPtr p = GrowBuffer(size);
|
|
std::copy(prefix, prefix + prefix_size, p);
|
|
return p + size - 1;
|
|
}
|
|
CharPtr p = GrowBuffer(width);
|
|
CharPtr end = p + width;
|
|
// TODO: error if fill is not convertible to Char
|
|
if (align == ALIGN_LEFT) {
|
|
std::copy(prefix, prefix + prefix_size, p);
|
|
p += size;
|
|
std::fill(p, end, fill);
|
|
} else if (align == ALIGN_CENTER) {
|
|
p = FillPadding(p, width, size, fill);
|
|
std::copy(prefix, prefix + prefix_size, p);
|
|
p += size;
|
|
} else {
|
|
if (align == ALIGN_NUMERIC) {
|
|
if (prefix_size != 0) {
|
|
p = std::copy(prefix, prefix + prefix_size, p);
|
|
size -= prefix_size;
|
|
}
|
|
} else {
|
|
std::copy(prefix, prefix + prefix_size, end - size);
|
|
}
|
|
std::fill(p, end - size, fill);
|
|
p = end;
|
|
}
|
|
return p - 1;
|
|
}
|
|
|
|
template <typename Char>
|
|
template <typename T, typename Spec>
|
|
void BasicWriter<Char>::FormatInt(T value, const Spec &spec) {
|
|
unsigned prefix_size = 0;
|
|
typedef typename internal::IntTraits<T>::MainType UnsignedType;
|
|
UnsignedType abs_value = value;
|
|
char prefix[4] = "";
|
|
if (internal::IsNegative(value)) {
|
|
prefix[0] = '-';
|
|
++prefix_size;
|
|
abs_value = 0 - abs_value;
|
|
} else if (spec.sign_flag()) {
|
|
prefix[0] = spec.plus_flag() ? '+' : ' ';
|
|
++prefix_size;
|
|
}
|
|
switch (spec.type()) {
|
|
case 0: case 'd': {
|
|
unsigned num_digits = internal::CountDigits(abs_value);
|
|
CharPtr p = PrepareBufferForInt(
|
|
num_digits, spec, prefix, prefix_size) + 1 - num_digits;
|
|
internal::FormatDecimal(GetBase(p), abs_value, num_digits);
|
|
break;
|
|
}
|
|
case 'x': case 'X': {
|
|
UnsignedType n = abs_value;
|
|
if (spec.hash_flag()) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = spec.type();
|
|
}
|
|
unsigned num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= 4) != 0);
|
|
Char *p = GetBase(PrepareBufferForInt(
|
|
num_digits, spec, prefix, prefix_size));
|
|
n = abs_value;
|
|
const char *digits = spec.type() == 'x' ?
|
|
"0123456789abcdef" : "0123456789ABCDEF";
|
|
do {
|
|
*p-- = digits[n & 0xf];
|
|
} while ((n >>= 4) != 0);
|
|
break;
|
|
}
|
|
case 'b': case 'B': {
|
|
UnsignedType n = abs_value;
|
|
if (spec.hash_flag()) {
|
|
prefix[prefix_size++] = '0';
|
|
prefix[prefix_size++] = spec.type();
|
|
}
|
|
unsigned num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= 1) != 0);
|
|
Char *p = GetBase(PrepareBufferForInt(num_digits, spec, prefix, prefix_size));
|
|
n = abs_value;
|
|
do {
|
|
*p-- = '0' + (n & 1);
|
|
} while ((n >>= 1) != 0);
|
|
break;
|
|
}
|
|
case 'o': {
|
|
UnsignedType n = abs_value;
|
|
if (spec.hash_flag())
|
|
prefix[prefix_size++] = '0';
|
|
unsigned num_digits = 0;
|
|
do {
|
|
++num_digits;
|
|
} while ((n >>= 3) != 0);
|
|
Char *p = GetBase(PrepareBufferForInt(
|
|
num_digits, spec, prefix, prefix_size));
|
|
n = abs_value;
|
|
do {
|
|
*p-- = '0' + (n & 7);
|
|
} while ((n >>= 3) != 0);
|
|
break;
|
|
}
|
|
default:
|
|
internal::ReportUnknownType(spec.type(), "integer");
|
|
break;
|
|
}
|
|
}
|
|
|
|
// The default formatting function.
|
|
template <typename Char, typename T>
|
|
void format(BasicWriter<Char> &w, const FormatSpec &spec, const T &value) {
|
|
std::basic_ostringstream<Char> os;
|
|
os << value;
|
|
w.write_str(os.str(), spec);
|
|
}
|
|
|
|
namespace internal {
|
|
// Formats an argument of a custom type, such as a user-defined class.
|
|
template <typename Char, typename T>
|
|
void FormatCustomArg(void *writer, const void *arg, const FormatSpec &spec) {
|
|
format(*static_cast<BasicWriter<Char>*>(writer),
|
|
spec, *static_cast<const T*>(arg));
|
|
}
|
|
}
|
|
|
|
// Reports a system error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
void ReportSystemError(int error_code, StringRef message) FMT_NOEXCEPT(true);
|
|
|
|
#ifdef _WIN32
|
|
|
|
/**
|
|
A Windows error.
|
|
*/
|
|
class WindowsError : public SystemError {
|
|
private:
|
|
void init(int error_code, StringRef format_str, const ArgList &args);
|
|
|
|
public:
|
|
/**
|
|
\rst
|
|
Constructs a :cpp:class:`fmt::WindowsError` object with the description
|
|
of the form "*<message>*: *<system-message>*", where *<message>* is the
|
|
formatted message and *<system-message>* is the system message corresponding
|
|
to the error code.
|
|
*error_code* is a Windows error code as given by ``GetLastError``.
|
|
\endrst
|
|
*/
|
|
WindowsError(int error_code, StringRef message) {
|
|
init(error_code, message, ArgList());
|
|
}
|
|
FMT_VARIADIC_CTOR(WindowsError, init, int, StringRef)
|
|
};
|
|
|
|
// Reports a Windows error without throwing an exception.
|
|
// Can be used to report errors from destructors.
|
|
void ReportWinError(int error_code, StringRef message) FMT_NOEXCEPT(true);
|
|
|
|
#endif
|
|
|
|
enum Color { BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE };
|
|
|
|
/**
|
|
Formats a string and prints it to stdout using ANSI escape sequences
|
|
to specify color (experimental).
|
|
Example:
|
|
PrintColored(fmt::RED, "Elapsed time: {0:.2f} seconds") << 1.23;
|
|
*/
|
|
void print_colored(Color c, StringRef format, const ArgList &args);
|
|
|
|
/**
|
|
\rst
|
|
Formats a string similarly to Python's `str.format
|
|
<http://docs.python.org/3/library/stdtypes.html#str.format>`__ function
|
|
and returns the result as a string.
|
|
|
|
*format_str* is a format string that contains literal text and replacement
|
|
fields surrounded by braces ``{}``. The fields are replaced with formatted
|
|
arguments in the resulting string.
|
|
|
|
*args* is an argument list representing arbitrary arguments.
|
|
|
|
**Example**::
|
|
|
|
std::string message = format("The answer is {}", 42);
|
|
|
|
See also `Format String Syntax`_.
|
|
\endrst
|
|
*/
|
|
inline std::string format(StringRef format_str, const ArgList &args) {
|
|
Writer w;
|
|
w.write(format_str, args);
|
|
return w.str();
|
|
}
|
|
|
|
inline std::wstring format(WStringRef format, const ArgList &args) {
|
|
WWriter w;
|
|
w.write(format, args);
|
|
return w.str();
|
|
}
|
|
|
|
/**
|
|
\rst
|
|
Prints formatted data to ``stdout``.
|
|
|
|
**Example**::
|
|
|
|
print("Elapsed time: {0:.2f} seconds", 1.23);
|
|
\endrst
|
|
*/
|
|
void print(StringRef format, const ArgList &args);
|
|
|
|
/**
|
|
\rst
|
|
Prints formatted data to a file.
|
|
|
|
**Example**::
|
|
|
|
print(stderr, "Don't {}!", "panic");
|
|
\endrst
|
|
*/
|
|
void print(std::FILE *f, StringRef format, const ArgList &args);
|
|
|
|
template <typename Char>
|
|
void printf(BasicWriter<Char> &w,
|
|
BasicStringRef<Char> format, const ArgList &args) {
|
|
internal::PrintfParser<Char>().Format(w, format, args);
|
|
}
|
|
|
|
inline std::string sprintf(StringRef format, const ArgList &args) {
|
|
Writer w;
|
|
printf(w, format, args);
|
|
return w.str();
|
|
}
|
|
|
|
void printf(StringRef format, const ArgList &args);
|
|
|
|
/**
|
|
Fast integer formatter.
|
|
*/
|
|
class FormatInt {
|
|
private:
|
|
// Buffer should be large enough to hold all digits (digits10 + 1),
|
|
// a sign and a null character.
|
|
enum {BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3};
|
|
mutable char buffer_[BUFFER_SIZE];
|
|
char *str_;
|
|
|
|
// Formats value in reverse and returns the number of digits.
|
|
char *FormatDecimal(ULongLong value) {
|
|
char *buffer_end = buffer_ + BUFFER_SIZE - 1;
|
|
while (value >= 100) {
|
|
// Integer division is slow so do it for a group of two digits instead
|
|
// of for every digit. The idea comes from the talk by Alexandrescu
|
|
// "Three Optimization Tips for C++". See speed-test for a comparison.
|
|
unsigned index = (value % 100) * 2;
|
|
value /= 100;
|
|
*--buffer_end = internal::DIGITS[index + 1];
|
|
*--buffer_end = internal::DIGITS[index];
|
|
}
|
|
if (value < 10) {
|
|
*--buffer_end = static_cast<char>('0' + value);
|
|
return buffer_end;
|
|
}
|
|
unsigned index = static_cast<unsigned>(value * 2);
|
|
*--buffer_end = internal::DIGITS[index + 1];
|
|
*--buffer_end = internal::DIGITS[index];
|
|
return buffer_end;
|
|
}
|
|
|
|
void FormatSigned(LongLong value) {
|
|
ULongLong abs_value = value;
|
|
bool negative = value < 0;
|
|
if (negative)
|
|
abs_value = 0 - value;
|
|
str_ = FormatDecimal(abs_value);
|
|
if (negative)
|
|
*--str_ = '-';
|
|
}
|
|
|
|
public:
|
|
explicit FormatInt(int value) { FormatSigned(value); }
|
|
explicit FormatInt(long value) { FormatSigned(value); }
|
|
explicit FormatInt(LongLong value) { FormatSigned(value); }
|
|
explicit FormatInt(unsigned value) : str_(FormatDecimal(value)) {}
|
|
explicit FormatInt(unsigned long value) : str_(FormatDecimal(value)) {}
|
|
explicit FormatInt(ULongLong value) : str_(FormatDecimal(value)) {}
|
|
|
|
/**
|
|
Returns the number of characters written to the output buffer.
|
|
*/
|
|
std::size_t size() const { return buffer_ - str_ + BUFFER_SIZE - 1; }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content. No terminating null
|
|
character is appended.
|
|
*/
|
|
const char *data() const { return str_; }
|
|
|
|
/**
|
|
Returns a pointer to the output buffer content with terminating null
|
|
character appended.
|
|
*/
|
|
const char *c_str() const {
|
|
buffer_[BUFFER_SIZE - 1] = '\0';
|
|
return str_;
|
|
}
|
|
|
|
/**
|
|
Returns the content of the output buffer as an `std::string`.
|
|
*/
|
|
std::string str() const { return std::string(str_, size()); }
|
|
};
|
|
|
|
// Formats a decimal integer value writing into buffer and returns
|
|
// a pointer to the end of the formatted string. This function doesn't
|
|
// write a terminating null character.
|
|
template <typename T>
|
|
inline void FormatDec(char *&buffer, T value) {
|
|
typename internal::IntTraits<T>::MainType abs_value = value;
|
|
if (internal::IsNegative(value)) {
|
|
*buffer++ = '-';
|
|
abs_value = 0 - abs_value;
|
|
}
|
|
if (abs_value < 100) {
|
|
if (abs_value < 10) {
|
|
*buffer++ = static_cast<char>('0' + abs_value);
|
|
return;
|
|
}
|
|
unsigned index = static_cast<unsigned>(abs_value * 2);
|
|
*buffer++ = internal::DIGITS[index];
|
|
*buffer++ = internal::DIGITS[index + 1];
|
|
return;
|
|
}
|
|
unsigned num_digits = internal::CountDigits(abs_value);
|
|
internal::FormatDecimal(buffer, abs_value, num_digits);
|
|
buffer += num_digits;
|
|
}
|
|
}
|
|
|
|
#if FMT_GCC_VERSION
|
|
// Use the system_header pragma to suppress warnings about variadic macros
|
|
// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't work.
|
|
// It is used at the end because we want to suppress as little warnings as
|
|
// possible.
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
// This is used to work around VC++ bugs in handling variadic macros.
|
|
#define FMT_EXPAND(args) args
|
|
|
|
// Returns the number of arguments.
|
|
// Based on https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s.
|
|
#define FMT_NARG(...) FMT_NARG_(__VA_ARGS__, FMT_RSEQ_N())
|
|
#define FMT_NARG_(...) FMT_EXPAND(FMT_ARG_N(__VA_ARGS__))
|
|
#define FMT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
|
|
#define FMT_RSEQ_N() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
|
|
|
|
#define FMT_CONCAT(a, b) a##b
|
|
#define FMT_FOR_EACH_(N, f, ...) \
|
|
FMT_EXPAND(FMT_CONCAT(FMT_FOR_EACH, N)(f, __VA_ARGS__))
|
|
#define FMT_FOR_EACH(f, ...) \
|
|
FMT_EXPAND(FMT_FOR_EACH_(FMT_NARG(__VA_ARGS__), f, __VA_ARGS__))
|
|
|
|
#define FMT_ADD_ARG_NAME(type, index) type arg##index
|
|
#define FMT_GET_ARG_NAME(type, index) arg##index
|
|
|
|
#if FMT_USE_VARIADIC_TEMPLATES
|
|
# define FMT_VARIADIC_(Char, ReturnType, func, call, ...) \
|
|
template<typename... Args> \
|
|
ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
|
|
const Args & ... args) { \
|
|
using fmt::internal::Arg; \
|
|
const Arg array[fmt::internal::NonZero<sizeof...(Args)>::VALUE] = { \
|
|
fmt::internal::MakeArg<Char>(args)... \
|
|
}; \
|
|
call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
|
|
fmt::ArgList(array, sizeof...(Args))); \
|
|
}
|
|
#else
|
|
// Defines a wrapper for a function taking __VA_ARGS__ arguments
|
|
// and n additional arguments of arbitrary types.
|
|
# define FMT_WRAP(Char, ReturnType, func, call, n, ...) \
|
|
template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
|
|
inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
|
|
FMT_GEN(n, FMT_MAKE_ARG)) { \
|
|
const fmt::internal::Arg args[] = {FMT_GEN(n, FMT_MAKE_REF_##Char)}; \
|
|
call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
|
|
fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
|
|
}
|
|
|
|
# define FMT_VARIADIC_(Char, ReturnType, func, call, ...) \
|
|
inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) { \
|
|
call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList()); \
|
|
} \
|
|
FMT_WRAP(Char, ReturnType, func, call, 1, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 2, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 3, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 4, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 5, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 6, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 7, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 8, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 9, __VA_ARGS__) \
|
|
FMT_WRAP(Char, ReturnType, func, call, 10, __VA_ARGS__)
|
|
#endif // FMT_USE_VARIADIC_TEMPLATES
|
|
|
|
/**
|
|
\rst
|
|
Defines a variadic function with the specified return type, function name
|
|
and argument types passed as variable arguments to this macro.
|
|
|
|
**Example**::
|
|
|
|
void print_error(const char *file, int line, const char *format,
|
|
const fmt::ArgList &args) {
|
|
fmt::print("{}: {}: ", file, line);
|
|
fmt::print(format, args);
|
|
}
|
|
FMT_VARIADIC(void, print_error, const char *, int, const char *)
|
|
\endrst
|
|
*/
|
|
#define FMT_VARIADIC(ReturnType, func, ...) \
|
|
FMT_VARIADIC_(char, ReturnType, func, return func, __VA_ARGS__)
|
|
|
|
#define FMT_VARIADIC_W(ReturnType, func, ...) \
|
|
FMT_VARIADIC_(wchar_t, ReturnType, func, return func, __VA_ARGS__)
|
|
|
|
namespace fmt {
|
|
FMT_VARIADIC(std::string, format, StringRef)
|
|
FMT_VARIADIC_W(std::wstring, format, WStringRef)
|
|
FMT_VARIADIC(void, print, StringRef)
|
|
FMT_VARIADIC(void, print, std::FILE *, StringRef)
|
|
FMT_VARIADIC(void, print_colored, Color, StringRef)
|
|
FMT_VARIADIC(std::string, sprintf, StringRef)
|
|
FMT_VARIADIC(void, printf, StringRef)
|
|
}
|
|
|
|
// Restore warnings.
|
|
#if FMT_GCC_VERSION >= 406
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
#endif // FMT_FORMAT_H_
|