mirror of
https://github.com/nushell/nushell.git
synced 2025-02-16 18:41:44 +01:00
1c49ca503a
# Description This PR renames the conversion functions on `Value` to be more consistent. It follows the Rust [API guidelines](https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv) for ad-hoc conversions. The conversion functions on `Value` now come in a few forms: - `coerce_{type}` takes a `&Value` and attempts to convert the value to `type` (e.g., `i64` are converted to `f64`). This is the old behavior of some of the `as_{type}` functions -- these functions have simply been renamed to better reflect what they do. - The new `as_{type}` functions take a `&Value` and returns an `Ok` result only if the value is of `type` (no conversion is attempted). The returned value will be borrowed if `type` is non-`Copy`, otherwise an owned value is returned. - `into_{type}` exists for non-`Copy` types, but otherwise does not attempt conversion just like `as_type`. It takes an owned `Value` and always returns an owned result. - `coerce_into_{type}` has the same relationship with `coerce_{type}` as `into_{type}` does with `as_{type}`. - `to_{kind}_string`: conversion to different string formats (debug, abbreviated, etc.). Only two of the old string conversion functions were removed, the rest have been renamed only. - `to_{type}`: other conversion functions. Currently, only `to_path` exists. (And `to_string` through `Display`.) This table summaries the above: | Form | Cost | Input Ownership | Output Ownership | Converts `Value` case/`type` | | ---------------------------- | ----- | --------------- | ---------------- | -------- | | `as_{type}` | Cheap | Borrowed | Borrowed/Owned | No | | `into_{type}` | Cheap | Owned | Owned | No | | `coerce_{type}` | Cheap | Borrowed | Borrowed/Owned | Yes | | `coerce_into_{type}` | Cheap | Owned | Owned | Yes | | `to_{kind}_string` | Expensive | Borrowed | Owned | Yes | | `to_{type}` | Expensive | Borrowed | Owned | Yes | # User-Facing Changes Breaking API change for `Value` in `nu-protocol` which is exposed as part of the plugin API. |
||
|---|---|---|
| .. | ||
| ast | ||
| config | ||
| engine | ||
| value | ||
| alias.rs | ||
| cli_error.rs | ||
| did_you_mean.rs | ||
| eval_base.rs | ||
| eval_const.rs | ||
| example.rs | ||
| exportable.rs | ||
| id.rs | ||
| lev_distance.rs | ||
| lib.rs | ||
| module.rs | ||
| parse_error.rs | ||
| parse_warning.rs | ||
| pipeline_data.rs | ||
| plugin_signature.rs | ||
| shell_error.rs | ||
| signature.rs | ||
| span.rs | ||
| syntax_shape.rs | ||
| ty.rs | ||
| util.rs | ||
| variable.rs | ||