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Difference between revisions of "cpp/header/charconv"

From cppreference.com
< cpp‎ | header
m (link to ja)
(indent)
Line 18: Line 18:
  
 
namespace std {
 
namespace std {
−
  // floating-point format for primitive numerical conversion
+
    // floating-point format for primitive numerical conversion
−
  enum class chars_format {
+
    enum class chars_format {
−
    scientific = /*unspecified*/ ,
+
        scientific = /*unspecified*/ ,
−
    fixed = /*unspecified*/ ,
+
        fixed = /*unspecified*/ ,
−
    hex = /*unspecified*/ ,
+
        hex = /*unspecified*/ ,
−
    general = fixed {{!}} scientific
+
        general = fixed {{!}} scientific
−
  };
+
    };
−
  // primitive numerical output conversion
+
    // primitive numerical output conversion
−
  struct to_chars_result {
+
    struct to_chars_result {
−
    char* ptr;
+
        char* ptr;
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    errc ec;
+
        errc ec;
−
  };
+
    };
−
  to_chars_result to_chars(char* first, char* last, /*see description*/ value, int base = 10);
+
    to_chars_result to_chars(char* first, char* last, /*see description*/ value, int base = 10);
−
  to_chars_result to_chars(char* first, char* last, float value);
+
    to_chars_result to_chars(char* first, char* last, float value);
−
  to_chars_result to_chars(char* first, char* last, double value);
+
    to_chars_result to_chars(char* first, char* last, double value);
−
  to_chars_result to_chars(char* first, char* last, long double value);
+
    to_chars_result to_chars(char* first, char* last, long double value);
−
  to_chars_result to_chars(char* first, char* last, float value, chars_format fmt);
+
    to_chars_result to_chars(char* first, char* last, float value, chars_format fmt);
−
  to_chars_result to_chars(char* first, char* last, double value, chars_format fmt);
+
    to_chars_result to_chars(char* first, char* last, double value, chars_format fmt);
−
  to_chars_result to_chars(char* first, char* last, long double value, chars_format fmt);
+
    to_chars_result to_chars(char* first, char* last, long double value, chars_format fmt);
−
  to_chars_result to_chars(char* first, char* last, float value,
+
    to_chars_result to_chars(char* first, char* last, float value,
−
                          chars_format fmt, int precision);
+
                            chars_format fmt, int precision);
−
  to_chars_result to_chars(char* first, char* last, double value,
+
    to_chars_result to_chars(char* first, char* last, double value,
−
                          chars_format fmt, int precision);
+
                            chars_format fmt, int precision);
−
  to_chars_result to_chars(char* first, char* last, long double value,
+
    to_chars_result to_chars(char* first, char* last, long double value,
−
                          chars_format fmt, int precision);
+
                            chars_format fmt, int precision);
−
  // primitive numerical input conversion
+
    // primitive numerical input conversion
−
  struct from_chars_result {
+
    struct from_chars_result {
−
    const char* ptr;
+
        const char* ptr;
−
    errc ec;
+
        errc ec;
−
  };
+
    };
−
  from_chars_result from_chars(const char* first, const char* last,
+
    from_chars_result from_chars(const char* first, const char* last,
−
                              /*see description*/ & value, int base = 10);
+
                                /*see description*/ & value, int base = 10);
−
  from_chars_result from_chars(const char* first, const char* last, float& value,
+
    from_chars_result from_chars(const char* first, const char* last, float& value,
−
                              chars_format fmt = chars_format::general);
+
                                chars_format fmt = chars_format::general);
−
  from_chars_result from_chars(const char* first, const char* last, double& value,
+
    from_chars_result from_chars(const char* first, const char* last, double& value,
−
                              chars_format fmt = chars_format::general);
+
                                chars_format fmt = chars_format::general);
−
  from_chars_result from_chars(const char* first, const char* last, long double& value,
+
    from_chars_result from_chars(const char* first, const char* last, long double& value,
−
                              chars_format fmt = chars_format::general);
+
                                chars_format fmt = chars_format::general);
 
}
 
}
 
}}
 
}}
  
 
{{langlinks|ja|zh}}
 
{{langlinks|ja|zh}}

Revision as of 01:25, 10 August 2019

 
C++
 
Standard library headers
General utilities
<any> (C++17)
<bitset>
<bit> (C++20)
<charconv> (C++17)
<expected> (C++23)
<format> (C++20)
<functional>
<optional> (C++17)
<tuple> (C++11)
<typeindex> (C++11)
<utility>
<variant> (C++17)
Containers
<array> (C++11)
<deque>
<flat_map> (C++23)
<flat_set> (C++23)
<forward_list> (C++11)
<inplace_vector> (C++26)   
<list>
<map>
<mdspan> (C++23)
<queue>
<set>
<span> (C++20)
<stack>
<unordered_map> (C++11)
<unordered_set> (C++11)
<vector>
Iterators
<iterator>
Ranges
<generator> (C++23)
<ranges> (C++20)
 

Classes

(C++17)
 specifies formatting for std::to_chars and std::from_chars
(enum) [edit]

Functions

(C++17)
 converts a character sequence to an integer or floating-point value
(function) [edit]
(C++17)
 converts an integer or floating-point value to a character sequence
(function) [edit]

Synopsis

namespace std {
    // floating-point format for primitive numerical conversion
    enum class chars_format {
        scientific = /*unspecified*/ ,
        fixed = /*unspecified*/ ,
        hex = /*unspecified*/ ,
        general = fixed | scientific
    };
    // primitive numerical output conversion
    struct to_chars_result {
        char* ptr;
        errc ec;
    };
    to_chars_result to_chars(char* first, char* last, /*see description*/ value, int base = 10);
    to_chars_result to_chars(char* first, char* last, float value);
    to_chars_result to_chars(char* first, char* last, double value);
    to_chars_result to_chars(char* first, char* last, long double value);
    to_chars_result to_chars(char* first, char* last, float value, chars_format fmt);
    to_chars_result to_chars(char* first, char* last, double value, chars_format fmt);
    to_chars_result to_chars(char* first, char* last, long double value, chars_format fmt);
    to_chars_result to_chars(char* first, char* last, float value,
                             chars_format fmt, int precision);
    to_chars_result to_chars(char* first, char* last, double value,
                             chars_format fmt, int precision);
    to_chars_result to_chars(char* first, char* last, long double value,
                             chars_format fmt, int precision);
    // primitive numerical input conversion
    struct from_chars_result {
        const char* ptr;
        errc ec;
    };
    from_chars_result from_chars(const char* first, const char* last,
                                 /*see description*/ & value, int base = 10);
    from_chars_result from_chars(const char* first, const char* last, float& value,
                                 chars_format fmt = chars_format::general);
    from_chars_result from_chars(const char* first, const char* last, double& value,
                                 chars_format fmt = chars_format::general);
    from_chars_result from_chars(const char* first, const char* last, long double& value,
                                 chars_format fmt = chars_format::general);
}
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