小编Mit*_*vec的帖子

我正在尝试将Google Test(gtest)代码移植到VxWorks 5.5.严重的缺点是开发环境Tornado 2.2使用古老的GCC编译器版本2.96.

在分析代码时,我找到了部分代码,gtest.h我不明白!这个C++模板类是如何运作的？

// ImplicitlyConvertible<From, To>::value is a compile-time bool
// constant that's true iff type From can be implicitly converted to
// type To.
template <typename From, typename To>
class ImplicitlyConvertible {
 private:
  // We need the following helper functions only for their types.
  // They have no implementations.

  // MakeFrom() is an expression whose type is From.  We cannot simply
  // use From(), as the type From may not have …