doku-derive 0.21.2

A framework for building documentation (internal macro)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73

use crate::prelude::*;
use darling::FromMeta;

/// Models the `#[serde]` attribute for fields:
///
/// ```ignore
/// struct Foo {
///     #[serde(flatten)]
///     field: Bar,
/// }
/// ````
#[derive(Clone, Debug, Default, FromMeta)]
#[allow(dead_code)]
pub struct SerdeField {
    #[darling(default, multiple)]
    pub alias: Vec<syn::LitStr>,

    #[darling(default)]
    pub default: Option<syn::Meta>,

    #[darling(default)]
    pub deserialize_with: Option<syn::Meta>,

    #[darling(default)]
    pub flatten: Option<bool>,

    #[darling(default)]
    pub rename: Option<syn::LitStr>,

    #[darling(default)]
    pub serialize_with: Option<syn::Meta>,

    #[darling(default)]
    pub skip: Option<bool>,

    #[darling(default)]
    pub skip_deserializing: Option<bool>,

    #[darling(default)]
    pub skip_serializing: Option<bool>,

    #[darling(default)]
    pub skip_serializing_if: Option<syn::Meta>,

    #[darling(default)]
    pub with: Option<syn::Meta>,
}

impl SerdeField {
    pub fn from_ast(attrs: &[syn::Attribute]) -> Result<Self> {
        attrs::from_ast(attrs, "serde")
            .map(|attrs| attrs.fold(Self::default(), Self::merge))
    }

    pub fn merge(mut self, mut other: Self) -> Self {
        self.alias.append(&mut other.alias);
        Self {
            alias: self.alias,
            default: None,          // it's a no-op for us
            deserialize_with: None, // it's a no-op for us
            flatten: other.flatten.or(self.flatten),
            rename: other.rename.or(self.rename),
            serialize_with: None, // it's a no-op for us
            skip: other.skip.or(self.skip),
            skip_deserializing: other
                .skip_deserializing
                .or(self.skip_deserializing),
            skip_serializing: other.skip_serializing.or(self.skip_serializing),
            skip_serializing_if: None, // it's a no-op for us
            with: None,                // it's a no-op for us
        }
    }
}