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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
extern crate proc_macro;
extern crate syn;
#[macro_use]
extern crate quote;
use proc_macro::TokenStream;
#[proc_macro_derive(TypeScriptify)]
pub fn hello_world(input: TokenStream) -> TokenStream {
// Construct a string representation of the type definition
let s = input.to_string();
// Parse the string representation
let ast = syn::parse_derive_input(&s).unwrap();
// Build the impl
let gen = impl_hello_world(&ast);
// Return the generated impl
gen.parse().unwrap()
}
fn impl_hello_world(ast: &syn::DeriveInput) -> quote::Tokens {
let name = &ast.ident;
let structname = name.to_string();
let _body = &ast.body;
let mut complete_string: String = "".to_string();
let _n = match ast.body {
syn::Body::Struct(ref data) => {
let mut fieldlines: Vec<String> = vec![];
for field in data.fields() {
//field.ty; //type of the field
//field.ident; //name (tuple struct fields have none here)
//field.vis; //visibility
//field.attrs; //attributes
//println!("Fieldtype = {:?} and Name = {:?}", field.ty, field.ident);
let fieldname: String = format!("{}", field.ident.clone().unwrap().to_string());
match field.ty {
syn::Ty::Array(ref _b, ref _c) => {
unimplemented!()
}
syn::Ty::Ptr(ref _p) => {
unimplemented!()
}
syn::Ty::Path(ref _qselfopt, ref path) => {
let intype = format!("{}", path.segments.last().unwrap().ident);
let generic_params_unformated = &path.segments.last().clone().unwrap().parameters;
let mut generics_parameters: Vec<String> = Vec::new();
match generic_params_unformated {
&syn::PathParameters::AngleBracketed(ref angle_bracketed_parameter_data) => {
for ty in &angle_bracketed_parameter_data.types {
match ty {
&syn::Ty::Path(ref _qotherself, ref qotherpath) => {
generics_parameters.push(format!("{}", qotherpath.segments.last().unwrap().ident));
}
_ => unimplemented!(),
}
}
}
_ => unimplemented!(),
};
//treat option special, as types in typescript are already nullable
let mtyp: String = if intype.eq("Option") {
(match generics_parameters.first().unwrap().as_ref() {
"i8" => "number",
"i16" => "number",
"i32" => "number",
"i64" => "number",
"u8" => "number",
"u16" => "number",
"u32" => "number",
"u64" => "number",
"usize" => "number",
"bool" => "boolean",
"String" => "string",
"f32" => "number",
"f64" => "number",
"HashMap" => "Map",
"Vec" => "Array",
"HashSet" => "Array",
"Value" => "any",
a @ _ => a,
}).to_string()
} else {
let mut generic_term_in_angle_brackets: String = if generics_parameters.is_empty() { "".to_string() } else { "<".to_string() };
for gen in &generics_parameters {
if generic_term_in_angle_brackets.len() > 1 {
generic_term_in_angle_brackets = generic_term_in_angle_brackets + ", ";
}
generic_term_in_angle_brackets = generic_term_in_angle_brackets + match gen.as_ref() {
"i8" => "number",
"i16" => "number",
"i32" => "number",
"i64" => "number",
"u8" => "number",
"u16" => "number",
"u32" => "number",
"u64" => "number",
"usize" => "number",
"bool" => "boolean",
"String" => "string",
"f32" => "number",
"f64" => "number",
"HashMap" => "Map",
"Vec" => "Array",
"HashSet" => "Array",
"Value" => "any",
a @ _ => a,
};
}
if !generics_parameters.is_empty() {
generic_term_in_angle_brackets = generic_term_in_angle_brackets + ">";
}
(match intype.as_ref() {
"i8" => "number".to_string(),
"i16" => "number".to_string(),
"i32" => "number".to_string(),
"i64" => "number".to_string(),
"u8" => "number".to_string(),
"u16" => "number".to_string(),
"u32" => "number".to_string(),
"u64" => "number".to_string(),
"usize" => "number".to_string(),
"bool" => "boolean".to_string(),
"String" => "string".to_string(),
"f32" => "number".to_string(),
"f64" => "number".to_string(),
"HashMap" => "Map".to_string(),
"Vec" => "Array".to_string(),
"HashSet" => "Array".to_string(),
"Value" => "any".to_string(),
a @ _ => a.to_string(),
} + &generic_term_in_angle_brackets)
};
fieldlines.push(format!("{}: {};", fieldname, mtyp));
}
_ => unimplemented!(),
}
}
let mut s = "".to_string();
for fieldline in fieldlines {
s = s + " " + &fieldline + "\n";
}
complete_string = format!("export interface {} {{\n{}}}", structname, s);
data.fields().len()
}
syn::Body::Enum(ref variant_vec) => {
let k = variant_vec.len();
let enum_name = format!("{}", name);
let mut variants: Vec<String> = Vec::new();
for variant in variant_vec {
let mut fieldlines: Vec<String> = vec![];
let variant_name = format!("{}", variant.ident);
variants.push(variant_name.to_string());
let data = &variant.data;
//add each variant as a field with the variant name as field name, and also its type
for field in data.fields() {
//field.ty; //type of the field
//field.ident; //name (tuple struct fields have none here)
//field.vis; //visibility
//field.attrs; //attributes
//println!("Fieldtype = {:?} and Name = {:?}", field.ty, field.ident);
let fieldname: String = format!("{}", field.ident.clone().unwrap().to_string());
match field.ty {
syn::Ty::Array(ref _b, ref _c) => {
unimplemented!()
}
syn::Ty::Ptr(ref _p) => {
unimplemented!()
}
syn::Ty::Path(ref _qselfopt, ref path) => {
let intype = format!("{}", path.segments.last().unwrap().ident);
let generic_params_unformated = &path.segments.last().clone().unwrap().parameters;
let mut generics_parameters: Vec<String> = Vec::new();
match generic_params_unformated {
&syn::PathParameters::AngleBracketed(ref angle_bracketed_parameter_data) => {
for ty in &angle_bracketed_parameter_data.types {
match ty {
&syn::Ty::Path(ref _qotherself, ref qotherpath) => {
generics_parameters.push(format!("{}", qotherpath.segments.last().unwrap().ident));
}
_ => unimplemented!(),
}
}
}
_ => unimplemented!(),
};
//treat option special, as types in typescript are already nullable
let mtyp: String = if intype.eq("Option") {
(match generics_parameters.first().unwrap().as_ref() {
"i8" => "number",
"i16" => "number",
"i32" => "number",
"i64" => "number",
"u8" => "number",
"u16" => "number",
"u32" => "number",
"u64" => "number",
"usize" => "number",
"bool" => "boolean",
"String" => "string",
"f32" => "number",
"f64" => "number",
"HashMap" => "Map",
"Vec" => "Array",
"HashSet" => "Array",
"Value" => "any",
a @ _ => a,
}).to_string()
} else {
let mut generic_term_in_angle_brackets: String = if generics_parameters.is_empty() { "".to_string() } else { "<".to_string() };
for gen in &generics_parameters {
if generic_term_in_angle_brackets.len() > 1 {
generic_term_in_angle_brackets = generic_term_in_angle_brackets + ", ";
}
generic_term_in_angle_brackets = generic_term_in_angle_brackets + match gen.as_ref() {
"i8" => "number",
"i16" => "number",
"i32" => "number",
"i64" => "number",
"u8" => "number",
"u16" => "number",
"u32" => "number",
"u64" => "number",
"usize" => "number",
"bool" => "boolean",
"String" => "string",
"f32" => "number",
"f64" => "number",
"HashMap" => "Map",
"Vec" => "Array",
"HashSet" => "Array",
"Value" => "any",
a @ _ => a,
};
}
if !generics_parameters.is_empty() {
generic_term_in_angle_brackets = generic_term_in_angle_brackets + ">";
}
(match intype.as_ref() {
"i8" => "number".to_string(),
"i16" => "number".to_string(),
"i32" => "number".to_string(),
"i64" => "number".to_string(),
"u8" => "number".to_string(),
"u16" => "number".to_string(),
"u32" => "number".to_string(),
"u64" => "number".to_string(),
"usize" => "number".to_string(),
"bool" => "boolean".to_string(),
"String" => "string".to_string(),
"f32" => "number".to_string(),
"f64" => "number".to_string(),
"HashMap" => "Map".to_string(),
"Vec" => "Array".to_string(),
"HashSet" => "Array".to_string(),
"Value" => "any".to_string(),
a @ _ => a.to_string(),
} + &generic_term_in_angle_brackets)
};
fieldlines.push(format!("{}: {};", fieldname, mtyp));
}
_ => unimplemented!(),
}
}
let mut s = "".to_string();
for fieldline in &fieldlines {
s = s + " " + fieldline.as_ref() + "\n";
}
complete_string = complete_string + &format!("export interface {} {{\n{}}}\n\n", variant_name, s);
}
//Add final enum interface:
let mut s = "".to_string();
for v in variants {
s = s + " " + v.as_ref() + ": " + v.as_ref() + ";\n";
}
complete_string = complete_string + &format!("export interface {} {{\n{}}}\n\n", enum_name, s);
k
}
};
quote! {
impl TypeScriptifyTrait for #name {
fn type_script_ify() -> String {
format!("{}\n", #complete_string)
}
}
}
}