darling_core/
from_attributes.rs

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1use syn::Attribute;
2
3use crate::Result;
4
5/// Create an instance by parsing a list of attributes.
6///
7/// This trait is useful when dealing with items such as traits on traits and impl blocks,
8/// for which `darling` does not provide dedicated traits.
9pub trait FromAttributes: Sized {
10    /// Create an instance by parsing a list of attributes.
11    ///
12    /// By convention, `FromAttributes` implementations should merge item
13    /// declarations across attributes, so that the following forms are
14    /// equivalent:
15    ///
16    /// ```rust,ignore
17    /// #[derive(Serialize)]
18    /// #[serde(rename_all = "camel_case")]
19    /// #[serde(borrow)]
20    /// pub struct SplitExample {}
21    ///
22    /// #[derive(Serialize)]
23    /// #[serde(borrow, rename_all = "camel_case")]
24    /// pub struct JoinedExample {}
25    /// ```
26    fn from_attributes(attrs: &[Attribute]) -> Result<Self>;
27}
darling_core/from_attributes.rs

darling_core/
from_attributes.rs
