GCC中的元组模板 [英] Tuple templates in GCC
问题描述
我首先在VS2010中用VC ++开发了C ++。我最近发现了一些工作，但我一直在使用RHEL 5和GCC。我的代码大多是本机C ++，但我注意到一件事... ...
GCC似乎没有认出< tuple> 头文件或元组模板。起初，我想也许这只是一个错字，直到我看着cplusplus.com，发现头部确实不是标准库的一部分。
问题是，我喜欢在Visual Studio中编写我的代码，因为环境比eclipse或netbeans环境要优越，美观，而且调试起来很轻松。事情是，我已经写了一大堆代码来使用元组，我非常喜欢我的代码。我应该如何处理这个问题？
以下是我的代码：
使用std :: cout;
使用std :: make_tuple;
使用std :: remove;
使用std :: string;
使用std :: stringstream;
使用std :: tolower;
使用std :: tuple;
使用std :: vector;
//定义三个条件来编码
enum {DONE，OK，EMPTY_LINE};
//包含条件和字符串向量的元组
typedef元组< int，vector< string>>码;
//将别名传递给字符串
//分析传递给它的行
Code ReadAndParse（string& line）
{
/ ******************************************* **** /
/ ****************移除评论**************** /
/ ******************************************* /
// Sentinel标记第一个
的位置//分号和索引位置本身
bool found = false;
size_t semicolonIndex = -1;
//将行转换为小写
for（int i = 0; i< line.length（）; i ++）
{
line [i] = tolower（第[i]行）;
//找到第一个分号
if（line [i] ==';'&&！found）
{
semicolonIndex = i;
//抛出标志
found = true;
//删除任何和分号以忽略注释
if（found！= false）
line.erase（semicolonIndex） ;
/ ************************************* ********** /
/ *****测试并看看有没有剩下的***** /
/ *********** ************************************ /
//要抓取和存储单词
代码;
字符串标记;
stringstream ss（line）;
vector< string>话;
//一个标志确实表明我们是否有任何东西
bool emptyLine = true;
//虽然字符串流传递了任何
，而（ss>>令牌）
{
// //如果我们触及了这一点，一个单词
emptyLine = false;
//将它推到单词vector
words.push_back（token）;
}
//如果我们所得到的只是一个空格，那么它是一个空行
if（emptyLine）
{
code = make_tuple（EMPTY_LINE，words ）;
返回码;
}
//此时它应该是好的
code = make_tuple（OK，words）;
返回码;
}
有没有办法将我的代码从编译器兼容性中解脱出来？
只要它只是一对，您可以使用
typedef pair< int，vector< string>>码;
但我不认为元组是标准的C ++（事实证明它包含在TR1中，标准C ++ 0x）。像往常一样，Boost虽然覆盖了你。所以包括：
$ $ p $ #includeboost / tuple / tuple.hpp
可以在编译器中解决您的问题。
I first started C++ with Microsoft VC++ in VS2010. I recently found some work, but I've been using RHEL 5 with GCC. My code is mostly native C++, but I've noticed one thing...
GCC doesn't appear to recognize the <tuple> header file, or the tuple template. At first I thought maybe it's just a typo, until I looked at cplusplus.com and found that the header is indeed not part of the standard library.
The problem is that I like to write my code in Visual Studio because the environment is way superior and aesthetically pleasing than eclipse or netbeans, and debugging is a breeze. The thing is, I've already written a good chunk of code to use tuples and I really like my code. How am I supposed to deal with this issue?
Here's my code:
using std::cout;
using std::make_tuple;
using std::remove;
using std::string;
using std::stringstream;
using std::tolower;
using std::tuple;
using std::vector;
// Define three conditions to code
enum {DONE, OK, EMPTY_LINE};
// Tuple containing a condition and a string vector
typedef tuple<int,vector<string>> Code;
// Passed an alias to a string
// Parses the line passed to it
Code ReadAndParse(string& line)
{
/***********************************************/
/****************REMOVE COMMENTS****************/
/***********************************************/
// Sentinel to flag down position of first
// semicolon and the index position itself
bool found = false;
size_t semicolonIndex = -1;
// Convert the line to lowercase
for(int i = 0; i < line.length(); i++)
{
line[i] = tolower(line[i]);
// Find first semicolon
if(line[i] == ';' && !found)
{
semicolonIndex = i;
// Throw the flag
found = true;
}
}
// Erase anything to and from semicolon to ignore comments
if(found != false)
line.erase(semicolonIndex);
/***********************************************/
/*****TEST AND SEE IF THERE'S ANYTHING LEFT*****/
/***********************************************/
// To snatch and store words
Code code;
string token;
stringstream ss(line);
vector<string> words;
// A flag do indicate if we have anything
bool emptyLine = true;
// While the string stream is passing anything
while(ss >> token)
{
// If we hit this point, we did find a word
emptyLine = false;
// Push it onto the words vector
words.push_back(token);
}
// If all we got was nothing, it's an empty line
if(emptyLine)
{
code = make_tuple(EMPTY_LINE, words);
return code;
}
// At this point it should be fine
code = make_tuple(OK, words);
return code;
}
Is there anyway to save my code from compiler incompatibility?
As long as it's just a pair you can use
typedef pair<int,vector<string>> Code;
But I don't think tuple is standard C++ (turns out it is included in TR1 and consequently also standard C++0x). As usual Boost has you covered though. So including:
#include "boost/tuple/tuple.hpp"
will solve your problem across compilers.
这篇关于GCC中的元组模板的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
