forked from extern/nushell
8da27a1a09
# Description
This PR creates a new `Record` type to reduce duplicate code and
possibly bugs as well. (This is an edited version of #9648.)
- `Record` implements `FromIterator` and `IntoIterator` and so can be
iterated over or collected into. For example, this helps with
conversions to and from (hash)maps. (Also, no more
`cols.iter().zip(vals)`!)
- `Record` has a `push(col, val)` function to help insure that the
number of columns is equal to the number of values. I caught a few
potential bugs thanks to this (e.g. in the `ls` command).
- Finally, this PR also adds a `record!` macro that helps simplify
record creation. It is used like so:
```rust
record! {
"key1" => some_value,
"key2" => Value::string("text", span),
"key3" => Value::int(optional_int.unwrap_or(0), span),
"key4" => Value::bool(config.setting, span),
}
```
Since macros hinder formatting, etc., the right hand side values should
be relatively short and sweet like the examples above.
Where possible, prefer `record!` or `.collect()` on an iterator instead
of multiple `Record::push`s, since the first two automatically set the
record capacity and do less work overall.
# User-Facing Changes
Besides the changes in `nu-protocol` the only other breaking changes are
to `nu-table::{ExpandedTable::build_map, JustTable::kv_table}`.
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|---|---|---|
| .. | ||
| ast | ||
| engine | ||
| value | ||
| alias.rs | ||
| cli_error.rs | ||
| config.rs | ||
| did_you_mean.rs | ||
| example.rs | ||
| exportable.rs | ||
| id.rs | ||
| lev_distance.rs | ||
| lib.rs | ||
| module.rs | ||
| parse_error.rs | ||
| pipeline_data.rs | ||
| plugin_signature.rs | ||
| shell_error.rs | ||
| signature.rs | ||
| span.rs | ||
| syntax_shape.rs | ||
| ty.rs | ||
| util.rs | ||
| variable.rs | ||