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The expression `with E1; E2' evaluates to E2 with all bindings in the attribute set E1 substituted. E.g., with {x = 123;}; x evaluates to 123. That is, the attribute set E1 is in scope in E2. This is particularly useful when importing files containing lots definitions. E.g., instead of let { inherit (import ./foo.nix) a b c d e f; body = ... a ... f ...; } we can now say with import ./foo.nix; ... a ... f ... I.e., we don't have to say what variables should be brought into scope. |
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.. | ||
bugs.xml | ||
installation.xml | ||
introduction.xml | ||
Makefile.am | ||
manual.xml | ||
nix-collect-garbage.xml | ||
nix-env.xml | ||
nix-instantiate.xml | ||
nix-lang-ref.xml | ||
nix-prefetch-url.xml | ||
nix-pull.xml | ||
nix-push.xml | ||
nix-store.xml | ||
opt-common-syn.xml | ||
opt-common.xml | ||
package-management.xml | ||
quick-start.xml | ||
schemas.xml | ||
style.css | ||
troubleshooting.xml | ||
writing-nix-expressions.xml |