I have the following:
#[derive(Debug, Copy, Clone, FromMeta)]
pub enum RenameCase {
#[darling(rename = "lowercase")]
Lower,
#[darling(rename = "UPPERCASE")]
Upper,
#[darling(rename = "PascalCase")]
Pascal,
#[darling(rename = "camelCase")]
Camel,
#[darling(rename = "snake_case")]
Snake,
#[darling(rename = "SCREAMING_SNAKE_CASE")]
ScreamingSnake,
#[darling(rename = "kebab-case")]
Kebab,
#[darling(rename = "SCREAMING-KEBAB-CASE")]
ScreamingKebab,
#[darling(rename = "Train-Case")]
Train,
#[darling(rename = "Title Case")]
Title,
}When the user misspells a word, they should see a list of suggestions. Currently, they will see an unhelpful message:
Error
rename_all = "unknown")]
├─Unknown literal value `unknown`
It would be nice if darling automatically showed what the possible variants are.
In my derive macro, I work around this by manually implementing the FromMeta trait and have to duplicate all of the strings.
impl FromMeta for RenameCase {
fn from_string(value: &str) -> darling::Result<Self> {
Ok(match value {
"lowercase" => Self::Lower,
"UPPERCASE" => Self::Upper,
"PascalCase" => Self::Pascal,
"camelCase" => Self::Camel,
"snake_case" => Self::Snake,
"SCREAMING_SNAKE_CASE" => Self::ScreamingSnake,
"kebab-case" => Self::Kebab,
"SCREAMING-KEBAB-CASE" => Self::ScreamingKebab,
"Train-Case" => Self::Train,
"Title Case" => Self::Title,
_ => {
return Err(darling::Error::custom(
r#"expected one of:
- "lowercase"
- "UPPERCASE"
- "PascalCase"
- "camelCase"
- "snake_case"
- "SCREAMING_SNAKE_CASE"
- "kebab-case"
- "SCREAMING-KEBAB-CASE"
- "Train-Case"
- "Title Case""#,
));
}
})
}
}This gives me the following helpful message:
rename_all = "unknown")]
├─expected one of:
│ - "lowercase"
│ - "UPPERCASE"
│ - "PascalCase"
│ - "camelCase"
│ - "snake_case"
│ - "SCREAMING_SNAKE_CASE"
│ - "kebab-case"
│ - "SCREAMING-KEBAB-CASE"
│ - "Train-Case"
│ - "Title Case"
It could be possible do define them in 1 place with strum but it'd be unfortunate to have to bring in a new dependency for this
I would really appreciate it if darling could provide this, e.g. with an attribute or (even better!) out of the box
Even better: Would be fantastic to provide an "did you mean:" option
I have the following:
When the user misspells a word, they should see a list of suggestions. Currently, they will see an unhelpful message:
Error
It would be nice if
darlingautomatically showed what the possible variants are.In my derive macro, I work around this by manually implementing the
FromMetatrait and have to duplicate all of the strings.This gives me the following helpful message:
It could be possible do define them in 1 place with
strumbut it'd be unfortunate to have to bring in a new dependency for thisI would really appreciate it if
darlingcould provide this, e.g. with an attribute or (even better!) out of the boxEven better: Would be fantastic to provide an "did you mean:" option