GCC 4.2模板奇怪的错误 [英] GCC 4.2 Template strange error

问题描述

我有使用GCC 4.2 / XCode编译的以下代码。

i have the following code compiled with GCC 4.2 / XCode.

template <typename T>
class irrProcessBufferAllocator
{
public:

    T* allocate(size_t cnt)
    {
        return allocProcessBufferOfType<T>(cnt);
    }

    void deallocate(T* ptr)
    {
        if (ptr)
        {
            releaseProcessBuffer(ptr);
        }
    }

    void construct(T* ptr, const T& e)
    {
        new ((void*)ptr) T(e);//"error: expected type-specifier before 'e' " and
//error: expected `;' before 'e'
    }

    void destruct(T* ptr)
    {
        ptr->~T();//error: expected class-name before ';' token
    }

};

我真的不知道如何解决错误。
请帮助，

i really can't figure out how to fix the errors. please help,

感谢。

推荐答案

确保你不缺少必要的包括：< cstddef> for std :: size_t 和< new> for placement new？

Just to make sure, you are not missing necessary includes: <cstddef> for std::size_t and <new> for placement new?

否则，这些函数看起来是正确的。如果这是整个分配器，它有其他缺陷，如缺少必需的typedef， address（）和 max_size（）方法，以及 rebind 模板。

Otherwise those functions would appear to be correct. If that is the entire allocator, it has other flaws, such as missing required typedefs, address() and max_size() methods, as well as a rebind template.

：错误的唯一原因可能是你定义了一个函数式宏T。

The only cause for the error could be that you have a function-style macro T defined.

#define T(z) zzz

会使预处理器替换所有 T（）它遇到，但留下 T s后面没有括号。

would make the preprocessor replace all T()'s it encounters, but leave the Ts not followed by brackets.

您可以重命名模板参数。

You could just rename the template argument.

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