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manual: set -> attribute set

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reword description to have shorter sentences.
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Valentin Gagarin 2022-07-28 16:10:22 +02:00
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22
doc/manual/src/expressions/language-values.md
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@ -172,25 +172,27 @@ function and the fifth being a set.
Note that lists are only lazy in values, and they are strict in length. Note that lists are only lazy in values, and they are strict in length.
## Sets ## Attribute Sets
Sets are really the core of the language, since ultimately the Nix Attribute sets are collections of name-value-pairs (called *attributes*) enclosed in curly brackets (`{ }`).
language is all about creating derivations, which are really just sets
of attributes to be passed to build scripts.
Sets are just a list of name/value pairs (called *attributes*) enclosed Names and values are separated by an equal sign (`=`).
in curly brackets, where each value is an arbitrary expression Each value is an arbitrary expression terminated by a semicolon (`;`).
terminated by a semicolon. For example:
Attributes can appear in any order.
An attribute name may only occur once.
Example:
```nix ```nix
{ x = 123; {
x = 123;
text = "Hello"; text = "Hello";
y = f { bla = 456; }; y = f { bla = 456; };
} }
``` ```
This defines a set with attributes named `x`, `text`, `y`. The order of This defines a set with attributes named `x`, `text`, `y`.
the attributes is irrelevant. An attribute name may only occur once.
Attributes can be selected from a set using the `.` operator. For Attributes can be selected from a set using the `.` operator. For
instance, instance,