optional

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optional 是什么意思

中文释义

a. 可选择的, 随意的

[化] 选购的

英文释义

a. possible but not necessary; left to personal choice

optional 的真实例句

以下例句摘自真实英文文章，看看 optional 在自然语境里怎么用：

In Fil-C++, the std::optional needs to be heap allocated because of a compiler pathology involving unions.

—— How to make a fast dynamic language interpreter

So, this change avoids a code path that leads to std::optional on a hot path.

—— How to make a fast dynamic language interpreter

A lot of this change is just changing function signatures to take Arguments instead of the optional vectors.

—— How to make a fast dynamic language interpreter

Some reluctant performers, in response to the endless exposure, have been looking for ways to make celebrity optional again.

—— The New Age of Performance Anxiety

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