使用 std::find 没有匹配的函数调用错误
no matching function call error using std::find
我有以下功能(用于测试):
static bool foo(void)
{
std::string name = "name";
std::vector<std::string> test;
std::vector<std::string>::iterator vStart = test.begin();
std::vector<std::string>::iterator vEnd = test.end();
return (std::find(vStart, vEnd, name) == vEnd);
}
然后出现编译错误:
/data/src/fiware-orion/src/lib/common/string.cpp: In function 'bool foo()':
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: error: no matching function for call to 'find(std::vector<std::basic_string<char> >::iterator&, std::vector<std::basic_string<char> >::iterator&, std::string&)'
return (std::find(vStart, vEnd, name) == vEnd);
^
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: note: candidate is:
In file included from /usr/include/c++/4.9/bits/locale_facets.h:48:0,
from /usr/include/c++/4.9/bits/basic_ios.h:37,
from /usr/include/c++/4.9/ios:44,
from /usr/include/c++/4.9/istream:38,
from /usr/include/c++/4.9/sstream:38,
from /data/src/fiware-orion/src/lib/common/string.cpp:31:
/usr/include/c++/4.9/bits/streambuf_iterator.h:369:5: note: template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(std::istreambuf_iterator<_CharT>, std::istreambuf_iterator<_CharT>, const _CharT2&)
find(istreambuf_iterator<_CharT> __first,
^
/usr/include/c++/4.9/bits/streambuf_iterator.h:369:5: note: template argument deduction/substitution failed:
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: note: '__gnu_cxx::__normal_iterator<std::basic_string<char>*, std::vector<std::basic_string<char> > >' is not derived from 'std::istreambuf_iterator<_CharT>'
return (std::find(vStart, vEnd, name) == vEnd);
可能指向问题的消息是这样的:
template argument deduction/substitution failed:
但据我了解,在 find() 函数参数(std::vector<std::string>::iterator
、std::vector<std::string>::iterator
和 std::string
)中使用的具体 类 是清楚的。
让我特别惊讶的是,foo() 函数的相同代码片段在我代码的其他部分(即其他 .cpp 文件)中逐字工作,所以它可能与 #include
链有某种关联在某种程度上我无法推断或追踪...
欢迎任何帮助!
您正在返回一个迭代器,但您的函数声明是 'void'
错误信息中没有#include <algorithm>
中的find
,只有streambuf_iterator.h
中的find
。添加 #include <algorithm>
.
我想你忘了包括 <algorithm>
请添加这个#include <algorithm>
我有以下功能(用于测试):
static bool foo(void)
{
std::string name = "name";
std::vector<std::string> test;
std::vector<std::string>::iterator vStart = test.begin();
std::vector<std::string>::iterator vEnd = test.end();
return (std::find(vStart, vEnd, name) == vEnd);
}
然后出现编译错误:
/data/src/fiware-orion/src/lib/common/string.cpp: In function 'bool foo()':
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: error: no matching function for call to 'find(std::vector<std::basic_string<char> >::iterator&, std::vector<std::basic_string<char> >::iterator&, std::string&)'
return (std::find(vStart, vEnd, name) == vEnd);
^
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: note: candidate is:
In file included from /usr/include/c++/4.9/bits/locale_facets.h:48:0,
from /usr/include/c++/4.9/bits/basic_ios.h:37,
from /usr/include/c++/4.9/ios:44,
from /usr/include/c++/4.9/istream:38,
from /usr/include/c++/4.9/sstream:38,
from /data/src/fiware-orion/src/lib/common/string.cpp:31:
/usr/include/c++/4.9/bits/streambuf_iterator.h:369:5: note: template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(std::istreambuf_iterator<_CharT>, std::istreambuf_iterator<_CharT>, const _CharT2&)
find(istreambuf_iterator<_CharT> __first,
^
/usr/include/c++/4.9/bits/streambuf_iterator.h:369:5: note: template argument deduction/substitution failed:
/data/src/fiware-orion/src/lib/common/string.cpp:167:39: note: '__gnu_cxx::__normal_iterator<std::basic_string<char>*, std::vector<std::basic_string<char> > >' is not derived from 'std::istreambuf_iterator<_CharT>'
return (std::find(vStart, vEnd, name) == vEnd);
可能指向问题的消息是这样的:
template argument deduction/substitution failed:
但据我了解,在 find() 函数参数(std::vector<std::string>::iterator
、std::vector<std::string>::iterator
和 std::string
)中使用的具体 类 是清楚的。
让我特别惊讶的是,foo() 函数的相同代码片段在我代码的其他部分(即其他 .cpp 文件)中逐字工作,所以它可能与 #include
链有某种关联在某种程度上我无法推断或追踪...
欢迎任何帮助!
您正在返回一个迭代器,但您的函数声明是 'void'
错误信息中没有#include <algorithm>
中的find
,只有streambuf_iterator.h
中的find
。添加 #include <algorithm>
.
我想你忘了包括 <algorithm>
请添加这个#include <algorithm>