edgedb-derive 0.5.1

Derive macros for EdgeDB database client.
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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111

use syn::punctuated::Punctuated;
use syn::parse::{Parse, ParseStream};

#[derive(Debug)]
enum FieldAttr {
    Json,
}

#[derive(Debug)]
enum ContainerAttr {
    Json,
}

struct FieldAttrList(pub Punctuated<FieldAttr, syn::Token![,]>);
struct ContainerAttrList(pub Punctuated<ContainerAttr, syn::Token![,]>);

pub struct FieldAttrs {
    pub json: bool,
}

pub struct ContainerAttrs {
    pub json: bool,
}

mod kw {
    syn::custom_keyword!(json);
}

impl Parse for FieldAttr {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        let lookahead = input.lookahead1();
        if lookahead.peek(kw::json) {
            let _ident: syn::Ident = input.parse()?;
            Ok(FieldAttr::Json)
        } else {
            Err(lookahead.error())
        }
    }
}

impl Parse for ContainerAttr {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        let lookahead = input.lookahead1();
        if lookahead.peek(kw::json) {
            let _ident: syn::Ident = input.parse()?;
            Ok(ContainerAttr::Json)
        } else {
            Err(lookahead.error())
        }
    }
}

impl Parse for ContainerAttrList {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        Punctuated::parse_terminated(input).map(ContainerAttrList)
    }
}

impl Parse for FieldAttrList {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        Punctuated::parse_terminated(input).map(FieldAttrList)
    }
}

impl FieldAttrs {
    fn default() -> FieldAttrs{
        FieldAttrs {
            json: false,
        }
    }
    pub fn from_syn(attrs: &[syn::Attribute]) -> syn::Result<FieldAttrs> {
        let mut res = FieldAttrs::default();
        for attr in attrs {
            if matches!(attr.style, syn::AttrStyle::Outer) &&
                attr.path().is_ident("edgedb")
            {
                let chunk: FieldAttrList = attr.parse_args()?;
                for item in chunk.0 {
                    match item {
                        FieldAttr::Json => res.json = true,
                    }
                }
            }
        }
        Ok(res)
    }
}

impl ContainerAttrs {
    fn default() -> ContainerAttrs{
        ContainerAttrs {
            json: false,
        }
    }
    pub fn from_syn(attrs: &[syn::Attribute]) -> syn::Result<ContainerAttrs> {
        let mut res = ContainerAttrs::default();
        for attr in attrs {
            if matches!(attr.style, syn::AttrStyle::Outer) &&
                attr.path().is_ident("edgedb")
            {
                let chunk: ContainerAttrList = attr.parse_args()?;
                for item in chunk.0 {
                    match item {
                        ContainerAttr::Json => res.json = true,
                    }
                }
            }
        }
        Ok(res)
    }
}