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nix/doc/manual/src/language/index.md
Valentin Gagarin 703b335c1d reword description of language properties
the list style is supposed to give more structure.
each property is explained as concisely as possible while trying not to
sound too fancy.
2022-08-15 11:34:39 +02:00

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# Nix Language
The Nix language is
- *domain-specific*
It only exists for the Nix package manager:
to describe packages and configurations as well as their variants and compositions.
It is not intended for general purpose use.
- *declarative*
There is no notion of executing sequential steps.
Dependencies between operations are established only through data.
- *pure*
Values cannot change during computation.
Functions always produce the same output if their input does not change.
- *functional*
Functions are like any other value.
Functions can be assigned to names, taken as arguments, or returned by functions.
- *lazy*
Expressions are only evaluated when their value is needed.
- *dynamically typed*
Type errors are only detected when expressions are evaluated.