C ++标准中Should和Shall的确切含义 [英] Exact meanings of Should and Shall in the C++ standard

问题描述

我一直在审查C ++标准03版本.我开始对 应该 和 应该 这两个词的含义感到困惑.

I've been reviewing the C++ standard 03 version. And I'm beginning to get confused with the meanings of the words Should and Shall.

应 似乎表示强制性要求(必须具备)，而标准中的应该似乎指示了可选要求(必须具有).用英语， 应该 表示期望，我误解了意思吗? 可以 代替吗?

Shall in the standard seems to indicate a compulsory requirement (will-have), where as Should in the standard seems to indicate an optional requirement (could-have). In English, Should implies an expectation, have I misunderstood the meaning? shouldn't Could be used instead?

推荐答案

从ISO TR 10176开始，信息技术–编写编程语言标准的指南:

From ISO TR 10176, Information technology – Guidelines for the preparation of programming language standards:

3.7 本文中使用的辅助动词

3.7.1 应:
表示对编程语言标准或处理器的要求.

3.7.1 shall:
An indication of a requirement on programming language standard or processors.

3.7.2 应该:
指示对编程语言标准或处理器的建议.

3.7.2 should:
An indication of a recommendation to programming language standard or processors.

3.7.3 可能:
指示编程语言标准或处理器的可选功能.当本技术报告向支持特定可选功能的编程语言标准提供建议时，在说明条件的句子中使用辅助动词"may".

3.7.3 may:
An indication of an optional feature of programming language standard or processors. When this Technical Report provides a recommendation to the programming language standard that supports a specific optional feature, the auxiliary verb "may" is used in the sentence explaining the condition.

这是从2002修订版开始的，当前的修订版是2003，但是我认为它并没有太大变化.(当前修订版的价格似乎为150欧元，有点陡峭.我在这里找到了2002修订版:

This is from the 2002 revision, the current revision is 2003, but I assume it hasn't changed much. (The current revision appears to be available for 150 euros, a bit steep. I found the 2002 revision here: http://std.dkuug.dk/jtc1/sc22/wg20/docs/n970-tr10176-2002.pdf.)

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