# "Extension types" for Kotlin

**URL:** <https://discuss.kotlinlang.org/t/extension-types-for-kotlin/1390>\
**Category:** Language Design\
**Created:** [January 2, 2016, 12:36am UTC](https://discuss.kotlinlang.org/t/extension-types-for-kotlin/1390 "2016-01-02T00:36:25Z")\
**Posts on this page:** 1\
**Showing post:** 20

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**Author:** ![yole](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.kotlinlang.org/yole/32/1425_2.png) [@yole](https://discuss.kotlinlang.org/u/yole)\
**Post date:** [June 20, 2016, 12:37pm UTC](https://discuss.kotlinlang.org/t/extension-types-for-kotlin/1390/20 "2016-06-20T12:37:17Z")

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The idea is indeed very similar to implicit conversions, for which we’ve made an explicit decision not to include them in the language.

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_[View the full topic](https://discuss.kotlinlang.org/t/extension-types-for-kotlin/1390)._