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Reference

C library:
- <cassert> (assert.h)
- <cctype> (ctype.h)
- <cerrno> (errno.h)
- C++11
  <cfenv> (fenv.h)
- <cfloat> (float.h)
- C++11
  <cinttypes> (inttypes.h)
- <ciso646> (iso646.h)
- <climits> (limits.h)
- <clocale> (locale.h)
- <cmath> (math.h)
- <csetjmp> (setjmp.h)
- <csignal> (signal.h)
- <cstdarg> (stdarg.h)
- C++11
  <cstdbool> (stdbool.h)
- <cstddef> (stddef.h)
- C++11
  <cstdint> (stdint.h)
- <cstdio> (stdio.h)
- <cstdlib> (stdlib.h)
- <cstring> (string.h)
- C++11
  <ctgmath> (tgmath.h)
- <ctime> (time.h)
- C++11
  <cuchar> (uchar.h)
- <cwchar> (wchar.h)
- <cwctype> (wctype.h)
Containers:
- C++11
  <array>
- <deque>
- C++11
  <forward_list>
- <list>
- <map>
- <queue>
- <set>
- <stack>
- C++11
  <unordered_map>
- C++11
  <unordered_set>
- <vector>
Input/Output:
- <fstream>
- <iomanip>
- <ios>
- <iosfwd>
- <iostream>
- <istream>
- <ostream>
- <sstream>
- <streambuf>
Multi-threading:
- C++11
  <atomic>
- C++11
  <condition_variable>
- C++11
  <future>
- C++11
  <mutex>
- C++11
  <thread>
Other:
- <algorithm>
- <bitset>
- C++11
  <chrono>
- C++11
  <codecvt>
- <complex>
- <exception>
- <functional>
- C++11
  <initializer_list>
- <iterator>
- <limits>
- <locale>
- <memory>
- <new>
- <numeric>
- C++11
  <random>
- C++11
  <ratio>
- C++11
  <regex>
- <stdexcept>
- <string>
- C++11
  <system_error>
- C++11
  <tuple>
- C++11
  <type_traits>
- C++11
  <typeindex>
- <typeinfo>
- <utility>
- <valarray>

<system_error>

classes
- C++11
  error_category
- C++11
  error_code
- C++11
  error_condition
- C++11
  is_error_code_enum
- C++11
  is_error_condition_enum
- C++11
  system_error
enum classes
- C++11
  errc
functions
- C++11
  generic_category
- C++11
  make_error_code
- C++11
  make_error_condition
- C++11
  system_category

Reference
<system_error>
make_error_code

function

<system_error>

std::make_error_code

error_code make_error_code (errc e) noexcept;

Make error code

Creates an error_code object (of the generic_category) from the errc enum value e.

It returns the same as

`1`	`error_code(static_cast<int>(e),generic_category());`

This function is called by error_code's constructor for error code enum types, and should be overloaded for all custom error code enum types defined in order to provide a mechanism to generate the appropriate error_code objects from them.

The standard library overloads this function for the io_errc and future_errc types: see make_error_code(io_errc) and make_error_code(future_errc).

Parameters

e: An enum value of type errc (see errc).

Return value

An error_code object representing the enum value e.

classes

enum classes

functions

std::make_error_code

Parameters

Return value

See also