Docs / Language Manual / Reserved Keyword
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You are currently looking at the v11.0 docs, which are still a work in progress. If you miss anything, you may find it in the older v10.0 docs here.

Reserved Keywords

Note: Some of these words are reserved purely for backward compatibility.

If you need to use one of these names as binding and/or field name, see Use Illegal Identifier Names.

  • and

  • as

  • assert

  • constraint

  • else

  • exception

  • external

  • false

  • for

  • if

  • in

  • include

  • lazy

  • let

  • module

  • mutable

  • of

  • open

  • rec

  • switch

  • true

  • try

  • type

  • when

  • while

  • with

Attribute (Decorator)Extensible Variant