# How to overwrite a Base.macro?

**URL:** <https://discourse.julialang.org/t/how-to-overwrite-a-base-macro/60043>\
**Category:** General Usage\
**Created:** [April 26, 2021, 4:46pm UTC](https://discourse.julialang.org/t/how-to-overwrite-a-base-macro/60043 "2021-04-26T16:46:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![qsong](https://avatars.discourse-cdn.com/v4/letter/q/d07c76/32.png) [@qsong](https://discourse.julialang.org/u/qsong)\
**Post date:** [April 26, 2021, 4:46pm UTC](https://discourse.julialang.org/t/how-to-overwrite-a-base-macro/60043/1 "2021-04-26T16:46:53Z")

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I got a good reason, which I will post later, to overwrite Base.@cmd. Is it possible? Thanks.

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**Author:** ![gustaphe](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gustaphe/32/18174_2.png) [@gustaphe](https://discourse.julialang.org/u/gustaphe)\
**Post date:** [April 26, 2021, 5:11pm UTC](https://discourse.julialang.org/t/how-to-overwrite-a-base-macro/60043/2 "2021-04-26T17:11:16Z")

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Sure.

```julia
import Base: @cmd

macro cmd(str)
...
end

```

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<div class="post-metadata">

**Author:** ![qsong](https://avatars.discourse-cdn.com/v4/letter/q/d07c76/32.png) [@qsong](https://discourse.julialang.org/u/qsong)\
**Post date:** [April 26, 2021, 5:59pm UTC](https://discourse.julialang.org/t/how-to-overwrite-a-base-macro/60043/3 "2021-04-26T17:59:37Z")

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My motivation is to prototype [curry underscore arguments to create anonymous functions](https://github.com/JuliaLang/julia/pull/24990#issuecomment-826249910). Thanks again.