hasAttr

builtins.hasAttr

Primop

Docs pulled from | This Revision | about 2 hours ago

Takes 2 arguments

s, set

hasAttr returns true if set has an attribute named s, and false otherwise. This is a dynamic version of the ? operator, since s is an expression rather than an identifier.

This function is not defined in a .nix file. It is likely a builtins function or an alias of a builtins function. builtins functions are predefined functions provided by Nix.

Noogle detected

Aliases

lib.hasAttr
lib.attrsets.hasAttr

Detected Type

hasAttr :: String -> AttrSet -> Bool

Implementation

This function is implemented in c++ and is part of the native nix runtime.