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allow mut to take pipelines (#9658)
# Description This extends the syntax fix for `let` (#9589) to `mut` as well. Example: `mut x = "hello world" | str length; print $x` closes #9634 # User-Facing Changes `mut` now joins `let` in being able to be assigned from a pipeline # Tests + Formatting <!-- Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect -A clippy::result_large_err` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass - `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the standard library > **Note** > from `nushell` you can also use the `toolkit` as follows > ```bash > use toolkit.nu # or use an `env_change` hook to activate it automatically > toolkit check pr > ``` --> # After Submitting <!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. -->
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@ -50,6 +50,30 @@ fn let_pipeline_allows_in() {
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assert_eq!(actual.out, "21");
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}
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#[test]
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fn mut_takes_pipeline() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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mut x = "hello world" | str length; print $x
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"#
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));
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assert_eq!(actual.out, "11");
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}
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#[test]
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fn mut_pipeline_allows_in() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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def foo [] { mut x = $in | str length; print ($x + 10) }; "hello world" | foo
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"#
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));
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assert_eq!(actual.out, "21");
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}
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#[ignore]
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#[test]
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fn let_with_external_failed() {
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