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

//! # Derive macros

extern crate proc_macro;
#[macro_use]
extern crate quote;

use proc_macro::TokenStream;

#[proc_macro_derive(ToErrorMessage)]
pub fn to_error_message(input: TokenStream) -> TokenStream {
  let input = syn::parse_macro_input!(input as syn::DeriveInput);
  let name = &input.ident;
  let expanded = quote! {
    impl ToErrorMessage for #name {
      fn message(self) -> String {
        self.0
      }
    }
  };
  TokenStream::from(expanded)
}

#[proc_macro_derive(DmnElement)]
pub fn dmn_element(input: TokenStream) -> TokenStream {
  let input = syn::parse_macro_input!(input as syn::DeriveInput);
  let name = &input.ident;
  let expanded = quote! {
    impl DmnElement for #name {
      fn namespace(&self) -> &str {
        &self.namespace
      }
      fn id(&self) -> &String {
        match &self.id {
          DmnId::Provided(id) => id,
          DmnId::Generated(id) => id,
        }
      }
      fn opt_id(&self) -> Option<&String> {
        match &self.id {
          DmnId::Provided(id) => Some(&id),
          DmnId::Generated(_) => None,
        }
      }
      fn description(&self) -> &Option<String> {
        &self.description
      }
      fn label(&self) -> &Option<String> {
        &self.label
      }
      fn extension_elements(&self) -> &Vec<ExtensionElement> {
        &self.extension_elements
      }
      fn extension_attributes(&self) -> &Vec<ExtensionAttribute> {
        &self.extension_attributes
      }
    }
  };
  TokenStream::from(expanded)
}

#[proc_macro_derive(NamedElement)]
pub fn named_element(input: TokenStream) -> TokenStream {
  let input = syn::parse_macro_input!(input as syn::DeriveInput);
  let name = &input.ident;
  let expanded = quote! {
    impl NamedElement for #name {
      fn name(&self) -> &str {
        &self.name
      }
      fn feel_name(&self) -> &Name {
        &self.feel_name
      }
    }
  };
  TokenStream::from(expanded)
}

#[proc_macro_derive(BusinessContextElement)]
pub fn business_context_element(input: TokenStream) -> TokenStream {
  let input = syn::parse_macro_input!(input as syn::DeriveInput);
  let name = &input.ident;
  let expanded = quote! {
    impl BusinessContextElement for #name {
      fn uri(&self) -> &Option<String> {
        &self.uri
      }
    }
  };
  TokenStream::from(expanded)
}

#[proc_macro_derive(Expression)]
pub fn expression(input: TokenStream) -> TokenStream {
  let input = syn::parse_macro_input!(input as syn::DeriveInput);
  let name = &input.ident;
  let expanded = quote! {
    impl Expression for #name {
      fn type_ref(&self) -> &Option<String> {
        &self.type_ref
      }
    }
  };
  TokenStream::from(expanded)
}