ruma_macros/api/
attribute.rs

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1//! Details of the `#[ruma_api(...)]` attributes.
2
3use syn::{
4    parse::{Parse, ParseStream},
5    Ident, Token, Type,
6};
7
8mod kw {
9    syn::custom_keyword!(body);
10    syn::custom_keyword!(raw_body);
11    syn::custom_keyword!(path);
12    syn::custom_keyword!(query);
13    syn::custom_keyword!(query_all);
14    syn::custom_keyword!(header);
15    syn::custom_keyword!(error);
16    syn::custom_keyword!(manual_body_serde);
17    syn::custom_keyword!(status);
18}
19
20pub enum RequestMeta {
21    NewtypeBody,
22    RawBody,
23    Path,
24    Query,
25    QueryAll,
26    Header(Ident),
27}
28
29impl Parse for RequestMeta {
30    fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
31        let lookahead = input.lookahead1();
32        if lookahead.peek(kw::body) {
33            let _: kw::body = input.parse()?;
34            Ok(Self::NewtypeBody)
35        } else if lookahead.peek(kw::raw_body) {
36            let _: kw::raw_body = input.parse()?;
37            Ok(Self::RawBody)
38        } else if lookahead.peek(kw::path) {
39            let _: kw::path = input.parse()?;
40            Ok(Self::Path)
41        } else if lookahead.peek(kw::query) {
42            let _: kw::query = input.parse()?;
43            Ok(Self::Query)
44        } else if lookahead.peek(kw::query_all) {
45            let _: kw::query_all = input.parse()?;
46            Ok(Self::QueryAll)
47        } else if lookahead.peek(kw::header) {
48            let _: kw::header = input.parse()?;
49            let _: Token![=] = input.parse()?;
50            input.parse().map(Self::Header)
51        } else {
52            Err(lookahead.error())
53        }
54    }
55}
56
57pub enum DeriveRequestMeta {
58    Error(Type),
59}
60
61impl Parse for DeriveRequestMeta {
62    fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
63        let lookahead = input.lookahead1();
64        if lookahead.peek(kw::error) {
65            let _: kw::error = input.parse()?;
66            let _: Token![=] = input.parse()?;
67            input.parse().map(Self::Error)
68        } else {
69            Err(lookahead.error())
70        }
71    }
72}
73
74pub enum ResponseMeta {
75    NewtypeBody,
76    RawBody,
77    Header(Ident),
78}
79
80impl Parse for ResponseMeta {
81    fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
82        let lookahead = input.lookahead1();
83        if lookahead.peek(kw::body) {
84            let _: kw::body = input.parse()?;
85            Ok(Self::NewtypeBody)
86        } else if lookahead.peek(kw::raw_body) {
87            let _: kw::raw_body = input.parse()?;
88            Ok(Self::RawBody)
89        } else if lookahead.peek(kw::header) {
90            let _: kw::header = input.parse()?;
91            let _: Token![=] = input.parse()?;
92            input.parse().map(Self::Header)
93        } else {
94            Err(lookahead.error())
95        }
96    }
97}
98
99#[allow(clippy::large_enum_variant)]
100pub enum DeriveResponseMeta {
101    ManualBodySerde,
102    Error(Type),
103    Status(Ident),
104}
105
106impl Parse for DeriveResponseMeta {
107    fn parse(input: ParseStream<'_>) -> syn::Result<Self> {
108        let lookahead = input.lookahead1();
109        if lookahead.peek(kw::manual_body_serde) {
110            let _: kw::manual_body_serde = input.parse()?;
111            Ok(Self::ManualBodySerde)
112        } else if lookahead.peek(kw::error) {
113            let _: kw::error = input.parse()?;
114            let _: Token![=] = input.parse()?;
115            input.parse().map(Self::Error)
116        } else if lookahead.peek(kw::status) {
117            let _: kw::status = input.parse()?;
118            let _: Token![=] = input.parse()?;
119            input.parse().map(Self::Status)
120        } else {
121            Err(lookahead.error())
122        }
123    }
124}
ruma_macros/api/attribute.rs

ruma_macros/api/
attribute.rs
