新的C ++ 11范围为（foreach）语法：哪些编译器支持它？ [英] New C++11 range-for (foreach) syntax: which compilers support it?

问题描述

我在这篇由Jeremy Siek发表的BoostCon演示文稿中看到了这个c ++ 11代码片段：

I saw this c++11 code fragment in this BoostCon presentation by Jeremy Siek:

deque<int> topo_order;
topological_sort(g, front_inserter(topo_order));

for (int v : topo_order){ //line 39
    cout << tasks[v] << endl;
}

尝试在gcc中编译时会出现以下错误：

Upon trying to compile in gcc there is the following error:

main.cpp:39: error: expected initializer before ‘:’ token

推荐答案

那么我想知道哪些编译器实际上支持这种语法？ p>至少GCC 支持4.6 （功能被称为基于范围的）。如果您已经有最新版本，不要忘记添加 -std = c ++ 0x 选项。

Well, at least GCC supports it in 4.6 (feature is called "Range-based for"). If you already have the latest version, don't forget to add the -std=c++0x option.

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