rustiful-derive 0.1.0

This is the derive crate, intended to be used with the rustiful crate.
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

#![crate_type = "proc-macro"]
#![recursion_limit = "512"]
#![cfg_attr(feature = "dev", allow(unstable_features))]
#![cfg_attr(feature = "dev", feature(plugin))]
#![cfg_attr(feature = "dev", plugin(clippy))]
#![warn(missing_debug_implementations, missing_copy_implementations, trivial_casts,
trivial_numeric_casts, unused_import_braces, unused_qualifications)]

#[macro_use]
extern crate quote;

extern crate syn;
extern crate proc_macro;

mod util;
mod json;
mod params;
mod builder;

use proc_macro::TokenStream;
use syn::DeriveInput;

#[proc_macro_derive(JsonApi, attributes(JsonApiId))]
pub fn generate_json_api(input: TokenStream) -> TokenStream {

    let source = parse_derive_input(&input);
    let name = &source.ident;
    let pair = util::get_attrs_and_id(source.body);

    // Build the output
    let mut expanded = builder::expand_json_api_builders(name, &pair);
    expanded.append(params::expand_json_api_fields(name, &source.attrs, &pair).as_str());
    expanded.append(json::expand_json_api_models(name, &pair).as_str());

    // Return the generated impl as a TokenStream
    expanded.parse().unwrap()
}

#[proc_macro_derive(JsonApiResource, attributes(JsonApiId))]
pub fn generate_json_api_models(input: TokenStream) -> TokenStream {
    let source = parse_derive_input(&input);
    let name = &source.ident;
    let pair = util::get_attrs_and_id(source.body);
    json::expand_json_api_models(name, &pair).parse().unwrap()
}

#[proc_macro_derive(JsonApiBuilder, attributes(JsonApiId))]
pub fn generate_json_api_builders(input: TokenStream) -> TokenStream {
    let source = parse_derive_input(&input);
    let name = &source.ident;
    let pair = util::get_attrs_and_id(source.body);
    builder::expand_json_api_builders(name, &pair).parse().unwrap()
}

#[proc_macro_derive(JsonApiParams)]
pub fn generate_json_api_request_parameters(input: TokenStream) -> TokenStream {
    let source = parse_derive_input(&input);
    let name = &source.ident;
    let pair = util::get_attrs_and_id(source.body);
    params::expand_json_api_fields(name, &source.attrs, &pair).parse().unwrap()
}

fn parse_derive_input(input: &TokenStream) -> DeriveInput {
    let source = input.to_string();

    // Parse the string representation into a syntax tree
    syn::parse_derive_input(&source).unwrap()
}