diff options
| author | Robert Hensing <robert@roberthensing.nl> | 2022-01-24 16:27:41 +0100 |
|---|---|---|
| committer | Robert Hensing <robert@roberthensing.nl> | 2022-01-24 16:31:59 +0100 |
| commit | 48dbe26229124114f26cfe0eec32866a47888452 (patch) | |
| tree | 6a5c863598baccf7fb95520bc3a670e47acb677a /nixos/doc/manual/development/option-types.section.md | |
| parent | 8691ab3d47f1f9f94b51357fba7b8133cc8bcd88 (diff) | |
| download | nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar.gz nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar.bz2 nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar.lz nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar.xz nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.tar.zst nixpkgs-48dbe26229124114f26cfe0eec32866a47888452.zip | |
nixos/doc: Document types.unique
Diffstat (limited to 'nixos/doc/manual/development/option-types.section.md')
| -rw-r--r-- | nixos/doc/manual/development/option-types.section.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/nixos/doc/manual/development/option-types.section.md b/nixos/doc/manual/development/option-types.section.md index ed557206659..56ffa8e9d79 100644 --- a/nixos/doc/manual/development/option-types.section.md +++ b/nixos/doc/manual/development/option-types.section.md @@ -250,6 +250,12 @@ Composed types are types that take a type as parameter. `listOf : Ensures that type *`t`* cannot be merged. It is used to ensure option definitions are declared only once. +`types.unique` `{ message = m }` *`t`* + +: Ensures that type *`t`* cannot be merged. Prints the message *`m`*, after + the line `The option <option path> is defined multiple times.` and before + a list of definition locations. + `types.either` *`t1 t2`* : Type *`t1`* or type *`t2`*, e.g. `with types; either int str`. |