nushell/crates/nu-command/src/core_commands/overlay
JT eaec480f42
Improve empty pipelines (#7383)
# Description

This fix changes pipelines to allow them to actually be empty. Mapping
over empty pipelines gives empty pipelines. Empty pipelines immediately
return `None` when iterated.

This removes a some of where `Span::new(0, 0)` was coming from, though
there are other cases where we still use it.

# User-Facing Changes

None

# 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.
2022-12-08 07:31:57 +13:00
..
command.rs add signature information when get help on one command (#7079) 2022-11-20 07:22:42 -06:00
hide.rs Improve empty pipelines (#7383) 2022-12-08 07:31:57 +13:00
list.rs Fix scoped overlay use not finding a module (#6474) 2022-09-04 18:36:42 +03:00
mod.rs Rename overlay commands (#6375) 2022-08-21 17:27:56 +03:00
new.rs Improve empty pipelines (#7383) 2022-12-08 07:31:57 +13:00
use_.rs Improve empty pipelines (#7383) 2022-12-08 07:31:57 +13:00