[英]C++: Error with Boost Filesystem copy_file
I'm running into some trouble with the copy_file function. 我在使用copy_file函数时遇到了一些麻烦。 My program is very simple, I'm just attempting to copy a text file from one spot to another. 我的程序非常简单,我只是尝试将文本文件从一个位置复制到另一个位置。
The following code brings up a "Debug Error!" 以下代码显示“调试错误!” because abort() was called. 因为调用了abort()。
int main()
{
path src_path = "C:\\src.txt";
path dst_path = "C:\\dst.txt";
cout << "src exists = " << exists( src_path ) << endl; // Prints True
boost::filesystem::copy_file( src_path, dst_path );
return 0;
}
If I look at some other examples of code on Stackoverflow I cannot notice what I'm doing wrong. 如果我看一下Stackoverflow上的其他一些代码示例,则不会注意到我做错了什么。 I feel like I'm missing something obvious here. 我觉得这里缺少明显的东西。
I have Boost v1.47 installed and I'm using Visual C++ 2010. 我已经安装了Boost v1.47,并且正在使用Visual C ++ 2010。
I'm guessing that the target file exists. 我猜目标文件存在。
template <class Path1, class Path2> void copy_file(const Path1& from_fp, const Path2& to_fp);
Requires :
Path1::external_string_type
andPath2::external_string_type
are the same type. 要求 :Path1::external_string_type
和Path2::external_string_type
是同一类型。Effects : The contents and attributes of the file from_fp resolves to are copied to the file to_fp resolves to. 效果 :将from_fp解析为的文件的内容和属性复制到to_fp解析为的文件。 Throws :
basic_filesystem_error<Path>
iffrom_fp.empty()
||
抛出 :basic_filesystem_error<Path>
如果from_fp.empty()
||
to_fp.empty()
||
to_fp.empty()
||
!exists(from_fp)
||
!exists(from_fp)
||
!is_regular_file(from_fp)
||
!is_regular_file(from_fp)
||
exists(to_fp)
A simple test like so: 像这样的简单测试:
#include <iostream>
#include <boost/filesystem.hpp>
int main()
{
using namespace boost::filesystem;
path src_path = "test.in";
path dst_path = "test.out";
std::cout << "src exists = " << std::boolalpha << exists( src_path ) << std::endl; // Prints true
try
{
boost::filesystem::copy_file( src_path, dst_path );
} catch (const boost::filesystem::filesystem_error& e)
{
std::cerr << "Error: " << e.what() << std::endl;
}
return 0;
}
Prints: 印刷品:
src exists = true
Error: boost::filesystem::copy_file: File exists: "test.in", "test.out"
on the second run :) 在第二次运行:)
I think if you are using boost::filesystem2 it should be boost::filesystem2::copy(src_path,dest_path); 我认为如果您使用boost :: filesystem2,则应该使用boost :: filesystem2 :: copy(src_path,dest_path); copy_file should have been deprecated. copy_file应该已被弃用。
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