hasContext

builtins.hasContext

Primop

Docs pulled from | This Revision | about 13 hours ago

Takes 1 arguments

Return true if string s has a non-empty context. The context can be obtained with getContext.

Example

Many operations require a string context to be empty because they are intended only to work with "regular" strings, and also to help users avoid unintentionally loosing track of string context elements. builtins.hasContext can help create better domain-specific errors in those case.
name: meta:

if builtins.hasContext name
then throw "package name cannot contain string context"
else { ${name} = meta; }

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.pathHasContext
lib.sources.pathHasContext

Implementation

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