标准C++库标头中的泛型“在此范围内未声明”错误
标准C++库标头中的泛型“在此范围内未声明”错误
提问于 2021-07-07 09:08:14
最近，我无意中遇到了“在此范围内未声明”的多次错误，如下所示：
/usr/include/c++/9/ext/string_conversions.h:84:25: error: ‘ERANGE’ was not declared in this scope
84 | else if (errno == ERANGE
| ^~~~~~
In file included from /usr/include/c++/9/system_error:39,
from /usr/include/c++/9/bits/ios_base.h:46,
from /usr/include/c++/9/ios:42,
from /usr/include/c++/9/istream:38,
from /usr/include/c++/9/fstream:38,
from myproject/main.cpp:3:
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h: At global scope:
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:42:40: error: ‘EAFNOSUPPORT’ was not declared in this scope
42 | address_family_not_supported = EAFNOSUPPORT,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:43:28: error: ‘EADDRINUSE’ was not declared in this scope
43 | address_in_use = EADDRINUSE,
| ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:44:34: error: ‘EADDRNOTAVAIL’ was not declared in this scope
44 | address_not_available = EADDRNOTAVAIL,
| ^~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:45:30: error: ‘EISCONN’ was not declared in this scope
45 | already_connected = EISCONN,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:46:35: error: ‘E2BIG’ was not declared in this scope
46 | argument_list_too_long = E2BIG,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:47:35: error: ‘EDOM’ was not declared in this scope
47 | argument_out_of_domain = EDOM,
| ^~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:48:25: error: ‘EFAULT’ was not declared in this scope
48 | bad_address = EFAULT,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:49:32: error: ‘EBADF’ was not declared in this scope
49 | bad_file_descriptor = EBADF,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:52:25: error: ‘EBADMSG’ was not declared in this scope
52 | bad_message = EBADMSG,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:55:25: error: ‘EPIPE’ was not declared in this scope
55 | broken_pipe = EPIPE,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:56:31: error: ‘ECONNABORTED’ was not declared in this scope
56 | connection_aborted = ECONNABORTED,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:57:42: error: ‘EALREADY’ was not declared in this scope
57 | connection_already_in_progress = EALREADY,
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:58:31: error: ‘ECONNREFUSED’ was not declared in this scope
58 | connection_refused = ECONNREFUSED,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:59:29: error: ‘ECONNRESET’ was not declared in this scope
59 | connection_reset = ECONNRESET,
| ^~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:60:30: error: ‘EXDEV’ was not declared in this scope
60 | cross_device_link = EXDEV,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:61:40: error: ‘EDESTADDRREQ’ was not declared in this scope
61 | destination_address_required = EDESTADDRREQ,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:62:35: error: ‘EBUSY’ was not declared in this scope
62 | device_or_resource_busy = EBUSY,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:63:32: error: ‘ENOTEMPTY’ was not declared in this scope
63 | directory_not_empty = ENOTEMPTY,
| ^~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:64:35: error: ‘ENOEXEC’ was not declared in this scope
64 | executable_format_error = ENOEXEC,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:65:32: error: ‘EEXIST’ was not declared in this scope
65 | file_exists = EEXIST,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:66:28: error: ‘EFBIG’ was not declared in this scope
66 | file_too_large = EFBIG,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:67:30: error: ‘ENAMETOOLONG’ was not declared in this scope
67 | filename_too_long = ENAMETOOLONG,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:68:35: error: ‘ENOSYS’ was not declared in this scope
68 | function_not_supported = ENOSYS,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:69:29: error: ‘EHOSTUNREACH’ was not declared in this scope
69 | host_unreachable = EHOSTUNREACH,
| ^~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:72:31: error: ‘EIDRM’ was not declared in this scope
72 | identifier_removed = EIDRM,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:75:34: error: ‘EILSEQ’ was not declared in this scope
75 | illegal_byte_sequence = EILSEQ,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:76:45: error: ‘ENOTTY’ was not declared in this scope
76 | inappropriate_io_control_operation = ENOTTY,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:77:25: error: ‘EINTR’ was not declared in this scope
77 | interrupted = EINTR,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:79:26: error: ‘ESPIPE’ was not declared in this scope
79 | invalid_seek = ESPIPE,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:80:22: error: ‘EIO’ was not declared in this scope
80 | io_error = EIO,
| ^~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:81:28: error: ‘EISDIR’ was not declared in this scope
81 | is_a_directory = EISDIR,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:82:26: error: ‘EMSGSIZE’ was not declared in this scope
82 | message_size = EMSGSIZE,
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:83:26: error: ‘ENETDOWN’ was not declared in this scope
83 | network_down = ENETDOWN,
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:84:27: error: ‘ENETRESET’ was not declared in this scope
84 | network_reset = ENETRESET,
| ^~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:85:32: error: ‘ENETUNREACH’ was not declared in this scope
85 | network_unreachable = ENETUNREACH,
| ^~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:86:28: error: ‘ENOBUFS’ was not declared in this scope
86 | no_buffer_space = ENOBUFS,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:87:29: error: ‘ECHILD’ was not declared in this scope
87 | no_child_process = ECHILD,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:90:21: error: ‘ENOLINK’ was not declared in this scope
90 | no_link = ENOLINK,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:93:30: error: ‘ENOLCK’ was not declared in this scope
93 | no_lock_available = ENOLCK,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:96:33: error: ‘ENODATA’ was not declared in this scope
96 | no_message_available = ENODATA,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:99:24: error: ‘ENOMSG’ was not declared in this scope
99 | no_message = ENOMSG,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:100:31: error: ‘ENOPROTOOPT’ was not declared in this scope
100 | no_protocol_option = ENOPROTOOPT,
| ^~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:101:31: error: ‘ENOSPC’ was not declared in this scope
101 | no_space_on_device = ENOSPC,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:104:32: error: ‘ENOSR’ was not declared in this scope
104 | no_stream_resources = ENOSR,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:107:37: error: ‘ENXIO’ was not declared in this scope
107 | no_such_device_or_address = ENXIO,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:108:28: error: ‘ENODEV’ was not declared in this scope
108 | no_such_device = ENODEV,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:109:37: error: ‘ENOENT’ was not declared in this scope
109 | no_such_file_or_directory = ENOENT,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:110:28: error: ‘ESRCH’ was not declared in this scope
110 | no_such_process = ESRCH,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:111:28: error: ‘ENOTDIR’ was not declared in this scope
111 | not_a_directory = ENOTDIR,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:112:26: error: ‘ENOTSOCK’ was not declared in this scope
112 | not_a_socket = ENOTSOCK,
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:115:26: error: ‘ENOSTR’ was not declared in this scope
115 | not_a_stream = ENOSTR,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:118:27: error: ‘ENOTCONN’ was not declared in this scope
118 | not_connected = ENOTCONN,
| ^~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:119:30: error: ‘ENOMEM’ was not declared in this scope
119 | not_enough_memory = ENOMEM,
| ^~~~~~
In file included from /usr/include/errno.h:28,
from /usr/include/c++/9/cerrno:42,
from /usr/include/c++/9/ext/string_conversions.h:44,
from /usr/include/c++/9/bits/basic_string.h:6493,
from /usr/include/c++/9/string:55,
from /usr/include/c++/9/bits/locale_classes.h:40,
from /usr/include/c++/9/bits/ios_base.h:41,
from /usr/include/c++/9/ios:42,
from /usr/include/c++/9/istream:38,
from /usr/include/c++/9/fstream:38,
from myproject/main.cpp:3:
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:122:27: error: ‘EOPNOTSUPP’ was not declared in this scope; did you mean ‘ENOTSUP’?
122 | not_supported = ENOTSUP,
| ^~~~~~~
In file included from /usr/include/c++/9/system_error:39,
from /usr/include/c++/9/bits/ios_base.h:46,
from /usr/include/c++/9/ios:42,
from /usr/include/c++/9/istream:38,
from /usr/include/c++/9/fstream:38,
from Pyfhel/Afhel/Afseal.cpp:34:
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:129:34: error: ‘EINPROGRESS’ was not declared in this scope
129 | operation_in_progress = EINPROGRESS,
| ^~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:130:35: error: ‘EPERM’ was not declared in this scope
130 | operation_not_permitted = EPERM,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:131:35: error: ‘EOPNOTSUPP’ was not declared in this scope; did you mean ‘ENOTSUP’?
131 | operation_not_supported = EOPNOTSUPP,
| ^~~~~~~~~~
| ENOTSUP
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:132:34: error: ‘EWOULDBLOCK’ was not declared in this scope
132 | operation_would_block = EWOULDBLOCK,
| ^~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:138:30: error: ‘EACCES’ was not declared in this scope
138 | permission_denied = EACCES,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:141:28: error: ‘EPROTO’ was not declared in this scope
141 | protocol_error = EPROTO,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:144:35: error: ‘EPROTONOSUPPORT’ was not declared in this scope
144 | protocol_not_supported = EPROTONOSUPPORT,
| ^~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:145:34: error: ‘EROFS’ was not declared in this scope; did you mean ‘EOF’?
145 | read_only_file_system = EROFS,
| ^~~~~
| EOF
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:146:41: error: ‘EDEADLK’ was not declared in this scope
146 | resource_deadlock_would_occur = EDEADLK,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:147:42: error: ‘EAGAIN’ was not declared in this scope
147 | resource_unavailable_try_again = EAGAIN,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:148:32: error: ‘ERANGE’ was not declared in this scope
148 | result_out_of_range = ERANGE,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:155:28: error: ‘ETIME’ was not declared in this scope
155 | stream_timeout = ETIME,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:159:28: error: ‘ETXTBSY’ was not declared in this scope
159 | text_file_busy = ETXTBSY,
| ^~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:162:23: error: ‘ETIMEDOUT’ was not declared in this scope
162 | timed_out = ETIMEDOUT,
| ^~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:163:41: error: ‘ENFILE’ was not declared in this scope; did you mean FILE’?
163 | too_many_files_open_in_system = ENFILE,
| ^~~~~~
| FILE
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:164:32: error: ‘EMFILE’ was not declared in this scope; did you mean FILE’?
164 | too_many_files_open = EMFILE,
| ^~~~~~
| FILE
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:165:28: error: ‘EMLINK’ was not declared in this scope
165 | too_many_links = EMLINK,
| ^~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:166:41: error: ‘ELOOP’ was not declared in this scope
166 | too_many_symbolic_link_levels = ELOOP,
| ^~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:169:28: error: ‘EOVERFLOW’ was not declared in this scope
169 | value_too_large = EOVERFLOW,
| ^~~~~~~~~
/usr/include/x86_64-linux-gnu/c++/9/bits/error_constants.h:172:32: error: ‘EPROTOTYPE’ was not declared in this scope
172 | wrong_protocol_type = EPROTOTYPE
| ^~~~~~~~~~
In file included from myproject/main.cpp:4:
/usr/include/c++/9/thread: In function ‘void std::this_thread::sleep_for(const std::chrono::duration<_Rep1, _Period1>&)’:
/usr/include/c++/9/thread:378:53: error: ‘EINTR’ was not declared in this scope
378 | while (::nanosleep(&__ts, &__ts) == -1 && errno == EINTR)
| ^~~~~产生于单个.cpp编译：
gcc -Imyproject/include1 -Imyproject/include2 -Imyproject/include3 -c myproject/main.cpp -o myproject/main.o.cpp文件并没有做什么特别的事情：
// main.cpp
#include <iostream> /* Print in std::cout */
#include <fstream> /* file management */
#include <thread> /* memory pools, multithread*/
#include "myheader1.h"
int main(int argc, char** argv) {
std::cout << "Have " << argc << " arguments:" << std::endl;
for (int i = 0; i < argc; ++i) {
std::cout << argv[i] << std::endl;
}
}而myheader.h是空的。
造成这一错误的原因是什么，如何解决？
注意:抛出的所有错误行都属于标准库中的问题，切换到g++没有任何影响。
回答 1
Stack Overflow用户
回答已采纳
发布于 2021-07-07 09:14:42
由于我们非常确定我们没有有意地访问标准库，而且这不是C++版本的问题(已经尝试添加-std=c++17并与编译的args类似，但没有效果)，因此此错误意味着我们意外地使用了标准的.h头。
造成这一错误的原因是什么？
include目录中至少有一个头文件(本例中为myproject/include1、myproject/include2、myproject/include3 )重载了C++ stdlib模块的名称，导致其中断。
如何解决这个问题？
删除冲突的头文件(如果您检测到的话)，将您包含的所有头文件重命名为具有非标准名称(避免vector.h、memory.h和排序)，或者只包括编译所需的文件和目录，忽略冲突的文件。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68283147
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