为size_t是在实践指针大小 [英] size_t is pointer size in practice

问题描述

首先，我要澄清的是，我现在非常熟悉的为size_t 和使用intptr_t ，和我不定义不想他们完成的任何重复。

Let me first clarify that I am by now very familiar with definitions of size_t and intptr_t, and I don't want any repetitions of what they accomplish.

相反，我想知道以下几点。你知道任何的平台，除了的的x86 / DOS（其难以承受的内存模型），其中投

Instead I would like to know the following. Do you know of any platform, except x86/DOS (with its unbearable memory models) where the cast

void* a = ...;
size_t b = (size_t)a;

的实际的丢失位或字节？

谢谢！

推荐答案

据我所知，在 AS / 400 指针是128位，但是为size_t被定义为32位的

AFAIK, on AS/400 pointers are 128-bit, but size_t is defined to be 32-bit.

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