Struct NixOptionalHelper 

pub struct NixOptionalHelper;

Helpers for generating Nix expressions dealing with nullable/optional values.

Implementations

impl NixOptionalHelper

pub fn map_nullable(value: NixExpr, default: NixExpr, f: NixExpr) -> NixExpr

Generate if x == null then default else f x.

pub fn fmap_nullable(value: NixExpr, f: NixExpr) -> NixExpr

Generate if x == null then null else f x.

pub fn with_default(base: NixExpr, attr: &str, default: NixExpr) -> NixExpr

Generate x or default (attribute access with fallback).

pub fn optionals(cond: NixExpr, list: NixExpr) -> NixExpr

Generate lib.optionals cond list.

pub fn optional(cond: NixExpr, value: NixExpr) -> NixExpr

Generate lib.optional cond value.