mirror of
https://github.com/nushell/nushell
synced 2024-12-28 14:03:09 +00:00
62e34b69b3
# Description
This adds `break`, `continue`, `return`, and `loop`.
* `break` - breaks out a loop
* `continue` - continues a loop at the next iteration
* `return` - early return from a function call
* `loop` - loop forever (until the loop hits a break)
Examples:
```
for i in 1..10 {
if $i == 5 {
continue
}
print $i
}
```
```
for i in 1..10 {
if $i == 5 {
break
}
print $i
}
```
```
def foo [x] {
if true {
return 2
}
$x
}
foo 100
```
```
loop { print "hello, forever" }
```
```
[1, 2, 3, 4, 5] | each {|x|
if $x > 3 { break }
$x
}
```
# User-Facing Changes
Adds the above commands.
# 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` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass
# 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.
37 lines
666 B
Rust
37 lines
666 B
Rust
use nu_test_support::{nu, pipeline};
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#[test]
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fn break_for_loop() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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for i in 1..10 { if $i == 2 { break }; print $i }
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"#
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));
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assert_eq!(actual.out, r#"1"#);
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}
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#[test]
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fn break_while_loop() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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while true { break }; print "hello"
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"#
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));
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assert_eq!(actual.out, r#"hello"#);
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}
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#[test]
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fn break_each() {
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let actual = nu!(
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cwd: ".", pipeline(
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r#"
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[1, 2, 3, 4, 5] | each {|x| if $x > 3 { break }; $x} | math sum
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"#
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));
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assert_eq!(actual.out, r#"6"#);
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}
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