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docs: make sample code valid Nix expressions

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This commit is contained in:
Valentin Gagarin
2024-11-08 22:38:34 +01:00
parent 73794b4d2d
commit 317f7f1a4c
1 changed files with 18 additions and 6 deletions
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24
lib/fixed-points.nix
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@@ -160,7 +160,9 @@ rec {
A fixed-point function returning an attribute set has the form
```nix
final: { # attributes }
final: {
# attributes
}
```
where `final` refers to the lazily evaluated attribute set returned by the fixed-point function.
@@ -168,7 +170,9 @@ rec {
An overlay to such a fixed-point function has the form
```nix
final: prev: { # attributes }
final: prev: {
# attributes
}
```
where `prev` refers to the result of the original function to `final`, and `final` is the result of the composition of the overlay and the original function.
@@ -177,8 +181,12 @@ rec {
```nix
let
f = final: { # attributes };
overlay = final: prev: { # attributes };
f = final: {
# attributes
};
overlay = final: prev: {
# attributes
};
in extends overlay f;
```
@@ -186,8 +194,12 @@ rec {
```nix
let
f = final: { # attributes };
overlay = final: prev: { # attributes };
f = final: {
# attributes
};
overlay = final: prev: {
# attributes
};
g = extends overlay f;
in fix g
```