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HappyFace
Asked: 2018-10-19 04:31:46 +0800 CST

`==` 在 zsh 扩展中做了什么？

  • 772

我遇到了这段代码：

map () {
    eval "$initDocs"
    usage "<lambda-function> [<item>...]"
    example "'<--- \$1 --->'" a b c d
    eval "$doneDocs"
    typeset f="$1"
    shift
    map_ () {
        echo ${(e)==f}
    }
    eval "$loopNow" map_
}

${(e)f}我不明白和之间有什么区别${(e)==f}。

zsh

1 个回答

  1. Best Answer

    来自zshexpn(1)：

    ${=spec}

    Perform word splitting using the rules for SH_WORD_SPLIT during the
    evaluation of spec, but regardless of whether the parameter appears
    in double quotes; if the `=' is doubled, turn it off.

    换句话说，无论它是否在全球范围内处于活动状态，都${==f}明确指定关闭此单个扩展。SH_WORD_SPLIT

    • 1

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