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041b39d2 XL |
1 | use lib::*; |
2 | ||
8faf50e0 XL |
3 | use de::{ |
4 | Deserialize, Deserializer, EnumAccess, Error, SeqAccess, Unexpected, VariantAccess, Visitor, | |
5 | }; | |
041b39d2 | 6 | |
8faf50e0 | 7 | #[cfg(any(core_duration, feature = "std", feature = "alloc"))] |
041b39d2 XL |
8 | use de::MapAccess; |
9 | ||
10 | use de::from_primitive::FromPrimitive; | |
ff7c6d11 | 11 | use private::de::InPlaceSeed; |
041b39d2 XL |
12 | |
13 | #[cfg(any(feature = "std", feature = "alloc"))] | |
14 | use private::de::size_hint; | |
15 | ||
16 | //////////////////////////////////////////////////////////////////////////////// | |
17 | ||
18 | struct UnitVisitor; | |
19 | ||
20 | impl<'de> Visitor<'de> for UnitVisitor { | |
21 | type Value = (); | |
22 | ||
23 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
24 | formatter.write_str("unit") | |
25 | } | |
26 | ||
8faf50e0 | 27 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
28 | where |
29 | E: Error, | |
30 | { | |
31 | Ok(()) | |
32 | } | |
33 | } | |
34 | ||
35 | impl<'de> Deserialize<'de> for () { | |
8faf50e0 | 36 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
37 | where |
38 | D: Deserializer<'de>, | |
39 | { | |
40 | deserializer.deserialize_unit(UnitVisitor) | |
41 | } | |
42 | } | |
43 | ||
8faf50e0 XL |
44 | #[cfg(feature = "unstable")] |
45 | impl<'de> Deserialize<'de> for ! { | |
46 | fn deserialize<D>(_deserializer: D) -> Result<Self, D::Error> | |
47 | where | |
48 | D: Deserializer<'de>, | |
49 | { | |
50 | Err(Error::custom("cannot deserialize `!`")) | |
51 | } | |
52 | } | |
53 | ||
041b39d2 XL |
54 | //////////////////////////////////////////////////////////////////////////////// |
55 | ||
56 | struct BoolVisitor; | |
57 | ||
58 | impl<'de> Visitor<'de> for BoolVisitor { | |
59 | type Value = bool; | |
60 | ||
61 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
62 | formatter.write_str("a boolean") | |
63 | } | |
64 | ||
8faf50e0 | 65 | fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E> |
041b39d2 XL |
66 | where |
67 | E: Error, | |
68 | { | |
69 | Ok(v) | |
70 | } | |
71 | } | |
72 | ||
73 | impl<'de> Deserialize<'de> for bool { | |
8faf50e0 | 74 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
75 | where |
76 | D: Deserializer<'de>, | |
77 | { | |
78 | deserializer.deserialize_bool(BoolVisitor) | |
79 | } | |
80 | } | |
81 | ||
82 | //////////////////////////////////////////////////////////////////////////////// | |
83 | ||
84 | macro_rules! visit_integer_method { | |
85 | ($src_ty:ident, $method:ident, $from_method:ident, $group:ident, $group_ty:ident) => { | |
86 | #[inline] | |
87 | fn $method<E>(self, v: $src_ty) -> Result<Self::Value, E> | |
88 | where | |
89 | E: Error, | |
90 | { | |
91 | match FromPrimitive::$from_method(v) { | |
92 | Some(v) => Ok(v), | |
93 | None => Err(Error::invalid_value(Unexpected::$group(v as $group_ty), &self)), | |
94 | } | |
95 | } | |
96 | } | |
97 | } | |
98 | ||
99 | macro_rules! visit_float_method { | |
100 | ($src_ty:ident, $method:ident) => { | |
101 | #[inline] | |
102 | fn $method<E>(self, v: $src_ty) -> Result<Self::Value, E> | |
103 | where | |
104 | E: Error, | |
105 | { | |
106 | Ok(v as Self::Value) | |
107 | } | |
108 | } | |
109 | } | |
110 | ||
111 | macro_rules! impl_deserialize_num { | |
112 | ($ty:ident, $method:ident, $($visit:ident),*) => { | |
113 | impl<'de> Deserialize<'de> for $ty { | |
114 | #[inline] | |
8faf50e0 | 115 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
116 | where |
117 | D: Deserializer<'de>, | |
118 | { | |
119 | struct PrimitiveVisitor; | |
120 | ||
121 | impl<'de> Visitor<'de> for PrimitiveVisitor { | |
122 | type Value = $ty; | |
123 | ||
124 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
125 | formatter.write_str(stringify!($ty)) | |
126 | } | |
127 | ||
128 | $( | |
129 | impl_deserialize_num!($visit $ty); | |
130 | )* | |
131 | } | |
132 | ||
133 | deserializer.$method(PrimitiveVisitor) | |
134 | } | |
135 | } | |
136 | }; | |
137 | ||
138 | (integer $ty:ident) => { | |
139 | visit_integer_method!(i8, visit_i8, from_i8, Signed, i64); | |
140 | visit_integer_method!(i16, visit_i16, from_i16, Signed, i64); | |
141 | visit_integer_method!(i32, visit_i32, from_i32, Signed, i64); | |
142 | visit_integer_method!(i64, visit_i64, from_i64, Signed, i64); | |
143 | ||
144 | visit_integer_method!(u8, visit_u8, from_u8, Unsigned, u64); | |
145 | visit_integer_method!(u16, visit_u16, from_u16, Unsigned, u64); | |
146 | visit_integer_method!(u32, visit_u32, from_u32, Unsigned, u64); | |
147 | visit_integer_method!(u64, visit_u64, from_u64, Unsigned, u64); | |
148 | }; | |
149 | ||
150 | (float $ty:ident) => { | |
151 | visit_float_method!(f32, visit_f32); | |
152 | visit_float_method!(f64, visit_f64); | |
153 | }; | |
154 | } | |
155 | ||
156 | impl_deserialize_num!(i8, deserialize_i8, integer); | |
157 | impl_deserialize_num!(i16, deserialize_i16, integer); | |
158 | impl_deserialize_num!(i32, deserialize_i32, integer); | |
159 | impl_deserialize_num!(i64, deserialize_i64, integer); | |
160 | impl_deserialize_num!(isize, deserialize_i64, integer); | |
161 | ||
162 | impl_deserialize_num!(u8, deserialize_u8, integer); | |
163 | impl_deserialize_num!(u16, deserialize_u16, integer); | |
164 | impl_deserialize_num!(u32, deserialize_u32, integer); | |
165 | impl_deserialize_num!(u64, deserialize_u64, integer); | |
166 | impl_deserialize_num!(usize, deserialize_u64, integer); | |
167 | ||
168 | impl_deserialize_num!(f32, deserialize_f32, integer, float); | |
169 | impl_deserialize_num!(f64, deserialize_f64, integer, float); | |
170 | ||
8faf50e0 XL |
171 | serde_if_integer128! { |
172 | impl<'de> Deserialize<'de> for i128 { | |
173 | #[inline] | |
174 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
175 | where | |
176 | D: Deserializer<'de>, | |
177 | { | |
178 | struct PrimitiveVisitor; | |
179 | ||
180 | impl<'de> Visitor<'de> for PrimitiveVisitor { | |
181 | type Value = i128; | |
182 | ||
183 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
184 | formatter.write_str("i128") | |
185 | } | |
186 | ||
187 | impl_deserialize_num!(integer i128); | |
188 | ||
189 | #[inline] | |
190 | fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E> | |
191 | where | |
192 | E: Error, | |
193 | { | |
194 | Ok(v) | |
195 | } | |
196 | ||
197 | #[inline] | |
198 | fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E> | |
199 | where | |
200 | E: Error, | |
201 | { | |
202 | if v <= i128::max_value() as u128 { | |
203 | Ok(v as i128) | |
204 | } else { | |
205 | Err(Error::invalid_value(Unexpected::Other("u128"), &self)) | |
206 | } | |
207 | } | |
208 | } | |
209 | ||
210 | deserializer.deserialize_i128(PrimitiveVisitor) | |
211 | } | |
212 | } | |
213 | ||
214 | impl<'de> Deserialize<'de> for u128 { | |
215 | #[inline] | |
216 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
217 | where | |
218 | D: Deserializer<'de>, | |
219 | { | |
220 | struct PrimitiveVisitor; | |
221 | ||
222 | impl<'de> Visitor<'de> for PrimitiveVisitor { | |
223 | type Value = u128; | |
224 | ||
225 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
226 | formatter.write_str("u128") | |
227 | } | |
228 | ||
229 | impl_deserialize_num!(integer u128); | |
230 | ||
231 | #[inline] | |
232 | fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E> | |
233 | where | |
234 | E: Error, | |
235 | { | |
236 | if v >= 0 { | |
237 | Ok(v as u128) | |
238 | } else { | |
239 | Err(Error::invalid_value(Unexpected::Other("i128"), &self)) | |
240 | } | |
241 | } | |
242 | ||
243 | #[inline] | |
244 | fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E> | |
245 | where | |
246 | E: Error, | |
247 | { | |
248 | Ok(v) | |
249 | } | |
250 | } | |
251 | ||
252 | deserializer.deserialize_u128(PrimitiveVisitor) | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
041b39d2 XL |
257 | //////////////////////////////////////////////////////////////////////////////// |
258 | ||
259 | struct CharVisitor; | |
260 | ||
261 | impl<'de> Visitor<'de> for CharVisitor { | |
262 | type Value = char; | |
263 | ||
264 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
265 | formatter.write_str("a character") | |
266 | } | |
267 | ||
268 | #[inline] | |
8faf50e0 | 269 | fn visit_char<E>(self, v: char) -> Result<Self::Value, E> |
041b39d2 XL |
270 | where |
271 | E: Error, | |
272 | { | |
273 | Ok(v) | |
274 | } | |
275 | ||
276 | #[inline] | |
8faf50e0 | 277 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
278 | where |
279 | E: Error, | |
280 | { | |
281 | let mut iter = v.chars(); | |
282 | match (iter.next(), iter.next()) { | |
283 | (Some(c), None) => Ok(c), | |
284 | _ => Err(Error::invalid_value(Unexpected::Str(v), &self)), | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | impl<'de> Deserialize<'de> for char { | |
290 | #[inline] | |
8faf50e0 | 291 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
292 | where |
293 | D: Deserializer<'de>, | |
294 | { | |
295 | deserializer.deserialize_char(CharVisitor) | |
296 | } | |
297 | } | |
298 | ||
299 | //////////////////////////////////////////////////////////////////////////////// | |
300 | ||
301 | #[cfg(any(feature = "std", feature = "alloc"))] | |
302 | struct StringVisitor; | |
ff7c6d11 XL |
303 | #[cfg(any(feature = "std", feature = "alloc"))] |
304 | struct StringInPlaceVisitor<'a>(&'a mut String); | |
041b39d2 XL |
305 | |
306 | #[cfg(any(feature = "std", feature = "alloc"))] | |
307 | impl<'de> Visitor<'de> for StringVisitor { | |
308 | type Value = String; | |
309 | ||
310 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
311 | formatter.write_str("a string") | |
312 | } | |
313 | ||
8faf50e0 | 314 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
315 | where |
316 | E: Error, | |
317 | { | |
318 | Ok(v.to_owned()) | |
319 | } | |
320 | ||
8faf50e0 | 321 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
322 | where |
323 | E: Error, | |
324 | { | |
325 | Ok(v) | |
326 | } | |
327 | ||
8faf50e0 | 328 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
329 | where |
330 | E: Error, | |
331 | { | |
332 | match str::from_utf8(v) { | |
333 | Ok(s) => Ok(s.to_owned()), | |
334 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
335 | } | |
336 | } | |
337 | ||
8faf50e0 | 338 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
041b39d2 XL |
339 | where |
340 | E: Error, | |
341 | { | |
342 | match String::from_utf8(v) { | |
343 | Ok(s) => Ok(s), | |
ff7c6d11 XL |
344 | Err(e) => Err(Error::invalid_value( |
345 | Unexpected::Bytes(&e.into_bytes()), | |
346 | &self, | |
347 | )), | |
348 | } | |
349 | } | |
350 | } | |
351 | ||
352 | #[cfg(any(feature = "std", feature = "alloc"))] | |
353 | impl<'a, 'de> Visitor<'de> for StringInPlaceVisitor<'a> { | |
354 | type Value = (); | |
355 | ||
356 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
357 | formatter.write_str("a string") | |
358 | } | |
359 | ||
8faf50e0 | 360 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
ff7c6d11 XL |
361 | where |
362 | E: Error, | |
363 | { | |
364 | self.0.clear(); | |
365 | self.0.push_str(v); | |
366 | Ok(()) | |
367 | } | |
368 | ||
8faf50e0 | 369 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
ff7c6d11 XL |
370 | where |
371 | E: Error, | |
372 | { | |
373 | *self.0 = v; | |
374 | Ok(()) | |
375 | } | |
376 | ||
8faf50e0 | 377 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
ff7c6d11 XL |
378 | where |
379 | E: Error, | |
380 | { | |
381 | match str::from_utf8(v) { | |
382 | Ok(s) => { | |
383 | self.0.clear(); | |
384 | self.0.push_str(s); | |
385 | Ok(()) | |
386 | } | |
387 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
388 | } | |
389 | } | |
390 | ||
8faf50e0 | 391 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
ff7c6d11 XL |
392 | where |
393 | E: Error, | |
394 | { | |
395 | match String::from_utf8(v) { | |
396 | Ok(s) => { | |
397 | *self.0 = s; | |
398 | Ok(()) | |
399 | } | |
400 | Err(e) => Err(Error::invalid_value( | |
401 | Unexpected::Bytes(&e.into_bytes()), | |
402 | &self, | |
403 | )), | |
041b39d2 XL |
404 | } |
405 | } | |
406 | } | |
407 | ||
408 | #[cfg(any(feature = "std", feature = "alloc"))] | |
409 | impl<'de> Deserialize<'de> for String { | |
8faf50e0 | 410 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
411 | where |
412 | D: Deserializer<'de>, | |
413 | { | |
414 | deserializer.deserialize_string(StringVisitor) | |
415 | } | |
ff7c6d11 XL |
416 | |
417 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
418 | where | |
419 | D: Deserializer<'de>, | |
420 | { | |
421 | deserializer.deserialize_string(StringInPlaceVisitor(place)) | |
422 | } | |
041b39d2 XL |
423 | } |
424 | ||
425 | //////////////////////////////////////////////////////////////////////////////// | |
426 | ||
427 | struct StrVisitor; | |
428 | ||
429 | impl<'a> Visitor<'a> for StrVisitor { | |
430 | type Value = &'a str; | |
431 | ||
432 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
433 | formatter.write_str("a borrowed string") | |
434 | } | |
435 | ||
436 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
437 | where | |
438 | E: Error, | |
439 | { | |
440 | Ok(v) // so easy | |
441 | } | |
442 | ||
443 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
444 | where | |
445 | E: Error, | |
446 | { | |
447 | str::from_utf8(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
448 | } | |
449 | } | |
450 | ||
451 | impl<'de: 'a, 'a> Deserialize<'de> for &'a str { | |
452 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
453 | where | |
454 | D: Deserializer<'de>, | |
455 | { | |
456 | deserializer.deserialize_str(StrVisitor) | |
457 | } | |
458 | } | |
459 | ||
460 | //////////////////////////////////////////////////////////////////////////////// | |
461 | ||
462 | struct BytesVisitor; | |
463 | ||
464 | impl<'a> Visitor<'a> for BytesVisitor { | |
465 | type Value = &'a [u8]; | |
466 | ||
467 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
468 | formatter.write_str("a borrowed byte array") | |
469 | } | |
470 | ||
471 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
472 | where | |
473 | E: Error, | |
474 | { | |
475 | Ok(v) | |
476 | } | |
477 | ||
478 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
479 | where | |
480 | E: Error, | |
481 | { | |
482 | Ok(v.as_bytes()) | |
483 | } | |
484 | } | |
485 | ||
486 | impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] { | |
487 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
488 | where | |
489 | D: Deserializer<'de>, | |
490 | { | |
491 | deserializer.deserialize_bytes(BytesVisitor) | |
492 | } | |
493 | } | |
494 | ||
495 | //////////////////////////////////////////////////////////////////////////////// | |
496 | ||
497 | #[cfg(feature = "std")] | |
498 | struct CStringVisitor; | |
499 | ||
500 | #[cfg(feature = "std")] | |
501 | impl<'de> Visitor<'de> for CStringVisitor { | |
502 | type Value = CString; | |
503 | ||
504 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
505 | formatter.write_str("byte array") | |
506 | } | |
507 | ||
8faf50e0 | 508 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
509 | where |
510 | A: SeqAccess<'de>, | |
511 | { | |
512 | let len = size_hint::cautious(seq.size_hint()); | |
513 | let mut values = Vec::with_capacity(len); | |
514 | ||
515 | while let Some(value) = try!(seq.next_element()) { | |
516 | values.push(value); | |
517 | } | |
518 | ||
519 | CString::new(values).map_err(Error::custom) | |
520 | } | |
521 | ||
8faf50e0 | 522 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
523 | where |
524 | E: Error, | |
525 | { | |
526 | CString::new(v).map_err(Error::custom) | |
527 | } | |
528 | ||
8faf50e0 | 529 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
041b39d2 XL |
530 | where |
531 | E: Error, | |
532 | { | |
533 | CString::new(v).map_err(Error::custom) | |
534 | } | |
535 | ||
8faf50e0 | 536 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
537 | where |
538 | E: Error, | |
539 | { | |
540 | CString::new(v).map_err(Error::custom) | |
541 | } | |
542 | ||
8faf50e0 | 543 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
544 | where |
545 | E: Error, | |
546 | { | |
547 | CString::new(v).map_err(Error::custom) | |
548 | } | |
549 | } | |
550 | ||
551 | #[cfg(feature = "std")] | |
552 | impl<'de> Deserialize<'de> for CString { | |
8faf50e0 | 553 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
554 | where |
555 | D: Deserializer<'de>, | |
556 | { | |
557 | deserializer.deserialize_byte_buf(CStringVisitor) | |
558 | } | |
559 | } | |
560 | ||
3b2f2976 | 561 | macro_rules! forwarded_impl { |
83c7162d XL |
562 | ( |
563 | $(#[doc = $doc:tt])* | |
564 | ( $($id: ident),* ), $ty: ty, $func: expr | |
565 | ) => { | |
566 | $(#[doc = $doc])* | |
3b2f2976 XL |
567 | impl<'de $(, $id : Deserialize<'de>,)*> Deserialize<'de> for $ty { |
568 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
569 | where | |
570 | D: Deserializer<'de>, | |
571 | { | |
572 | Deserialize::deserialize(deserializer).map($func) | |
573 | } | |
574 | } | |
041b39d2 XL |
575 | } |
576 | } | |
577 | ||
8faf50e0 | 578 | #[cfg(all(feature = "std", de_boxed_c_str))] |
3b2f2976 XL |
579 | forwarded_impl!((), Box<CStr>, CString::into_boxed_c_str); |
580 | ||
041b39d2 XL |
581 | //////////////////////////////////////////////////////////////////////////////// |
582 | ||
583 | struct OptionVisitor<T> { | |
584 | marker: PhantomData<T>, | |
585 | } | |
586 | ||
587 | impl<'de, T> Visitor<'de> for OptionVisitor<T> | |
588 | where | |
589 | T: Deserialize<'de>, | |
590 | { | |
591 | type Value = Option<T>; | |
592 | ||
593 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
594 | formatter.write_str("option") | |
595 | } | |
596 | ||
597 | #[inline] | |
8faf50e0 | 598 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
599 | where |
600 | E: Error, | |
601 | { | |
602 | Ok(None) | |
603 | } | |
604 | ||
605 | #[inline] | |
8faf50e0 | 606 | fn visit_none<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
607 | where |
608 | E: Error, | |
609 | { | |
610 | Ok(None) | |
611 | } | |
612 | ||
613 | #[inline] | |
8faf50e0 | 614 | fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> |
041b39d2 XL |
615 | where |
616 | D: Deserializer<'de>, | |
617 | { | |
618 | T::deserialize(deserializer).map(Some) | |
619 | } | |
8faf50e0 XL |
620 | |
621 | #[doc(hidden)] | |
622 | fn __private_visit_untagged_option<D>(self, deserializer: D) -> Result<Self::Value, ()> | |
623 | where | |
624 | D: Deserializer<'de>, | |
625 | { | |
626 | Ok(T::deserialize(deserializer).ok()) | |
627 | } | |
041b39d2 XL |
628 | } |
629 | ||
630 | impl<'de, T> Deserialize<'de> for Option<T> | |
631 | where | |
632 | T: Deserialize<'de>, | |
633 | { | |
8faf50e0 | 634 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
635 | where |
636 | D: Deserializer<'de>, | |
637 | { | |
ff7c6d11 XL |
638 | deserializer.deserialize_option(OptionVisitor { |
639 | marker: PhantomData, | |
640 | }) | |
041b39d2 | 641 | } |
ff7c6d11 XL |
642 | |
643 | // The Some variant's repr is opaque, so we can't play cute tricks with its | |
644 | // tag to have deserialize_in_place build the content in place unconditionally. | |
645 | // | |
646 | // FIXME: investigate whether branching on the old value being Some to | |
647 | // deserialize_in_place the value is profitable (probably data-dependent?) | |
041b39d2 XL |
648 | } |
649 | ||
650 | //////////////////////////////////////////////////////////////////////////////// | |
651 | ||
2c00a5a8 | 652 | struct PhantomDataVisitor<T: ?Sized> { |
041b39d2 XL |
653 | marker: PhantomData<T>, |
654 | } | |
655 | ||
2c00a5a8 | 656 | impl<'de, T: ?Sized> Visitor<'de> for PhantomDataVisitor<T> { |
041b39d2 XL |
657 | type Value = PhantomData<T>; |
658 | ||
659 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
660 | formatter.write_str("unit") | |
661 | } | |
662 | ||
663 | #[inline] | |
8faf50e0 | 664 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
665 | where |
666 | E: Error, | |
667 | { | |
668 | Ok(PhantomData) | |
669 | } | |
670 | } | |
671 | ||
2c00a5a8 | 672 | impl<'de, T: ?Sized> Deserialize<'de> for PhantomData<T> { |
8faf50e0 | 673 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
674 | where |
675 | D: Deserializer<'de>, | |
676 | { | |
ff7c6d11 XL |
677 | let visitor = PhantomDataVisitor { |
678 | marker: PhantomData, | |
679 | }; | |
041b39d2 XL |
680 | deserializer.deserialize_unit_struct("PhantomData", visitor) |
681 | } | |
682 | } | |
683 | ||
684 | //////////////////////////////////////////////////////////////////////////////// | |
685 | ||
686 | #[cfg(any(feature = "std", feature = "alloc"))] | |
687 | macro_rules! seq_impl { | |
688 | ( | |
689 | $ty:ident < T $(: $tbound1:ident $(+ $tbound2:ident)*)* $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
690 | $access:ident, | |
ff7c6d11 | 691 | $clear:expr, |
041b39d2 | 692 | $with_capacity:expr, |
ff7c6d11 | 693 | $reserve:expr, |
041b39d2 XL |
694 | $insert:expr |
695 | ) => { | |
696 | impl<'de, T $(, $typaram)*> Deserialize<'de> for $ty<T $(, $typaram)*> | |
697 | where | |
698 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
699 | $($typaram: $bound1 $(+ $bound2)*,)* | |
700 | { | |
701 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
702 | where | |
703 | D: Deserializer<'de>, | |
704 | { | |
705 | struct SeqVisitor<T $(, $typaram)*> { | |
706 | marker: PhantomData<$ty<T $(, $typaram)*>>, | |
707 | } | |
708 | ||
709 | impl<'de, T $(, $typaram)*> Visitor<'de> for SeqVisitor<T $(, $typaram)*> | |
710 | where | |
711 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
712 | $($typaram: $bound1 $(+ $bound2)*,)* | |
713 | { | |
714 | type Value = $ty<T $(, $typaram)*>; | |
715 | ||
716 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
717 | formatter.write_str("a sequence") | |
718 | } | |
719 | ||
720 | #[inline] | |
721 | fn visit_seq<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
722 | where | |
723 | A: SeqAccess<'de>, | |
724 | { | |
725 | let mut values = $with_capacity; | |
726 | ||
727 | while let Some(value) = try!($access.next_element()) { | |
728 | $insert(&mut values, value); | |
729 | } | |
730 | ||
731 | Ok(values) | |
732 | } | |
733 | } | |
734 | ||
735 | let visitor = SeqVisitor { marker: PhantomData }; | |
736 | deserializer.deserialize_seq(visitor) | |
737 | } | |
ff7c6d11 XL |
738 | |
739 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
740 | where | |
741 | D: Deserializer<'de>, | |
742 | { | |
743 | struct SeqInPlaceVisitor<'a, T: 'a $(, $typaram: 'a)*>(&'a mut $ty<T $(, $typaram)*>); | |
744 | ||
745 | impl<'a, 'de, T $(, $typaram)*> Visitor<'de> for SeqInPlaceVisitor<'a, T $(, $typaram)*> | |
746 | where | |
747 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
748 | $($typaram: $bound1 $(+ $bound2)*,)* | |
749 | { | |
750 | type Value = (); | |
751 | ||
752 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
753 | formatter.write_str("a sequence") | |
754 | } | |
755 | ||
756 | #[inline] | |
8faf50e0 | 757 | fn visit_seq<A>(mut self, mut $access: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
758 | where |
759 | A: SeqAccess<'de>, | |
760 | { | |
761 | $clear(&mut self.0); | |
762 | $reserve(&mut self.0, size_hint::cautious($access.size_hint())); | |
763 | ||
764 | // FIXME: try to overwrite old values here? (Vec, VecDeque, LinkedList) | |
765 | while let Some(value) = try!($access.next_element()) { | |
766 | $insert(&mut self.0, value); | |
767 | } | |
768 | ||
769 | Ok(()) | |
770 | } | |
771 | } | |
772 | ||
773 | deserializer.deserialize_seq(SeqInPlaceVisitor(place)) | |
774 | } | |
041b39d2 XL |
775 | } |
776 | } | |
777 | } | |
778 | ||
ff7c6d11 XL |
779 | // Dummy impl of reserve |
780 | #[cfg(any(feature = "std", feature = "alloc"))] | |
781 | fn nop_reserve<T>(_seq: T, _n: usize) {} | |
782 | ||
041b39d2 XL |
783 | #[cfg(any(feature = "std", feature = "alloc"))] |
784 | seq_impl!( | |
785 | BinaryHeap<T: Ord>, | |
786 | seq, | |
ff7c6d11 | 787 | BinaryHeap::clear, |
041b39d2 | 788 | BinaryHeap::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 | 789 | BinaryHeap::reserve, |
041b39d2 XL |
790 | BinaryHeap::push); |
791 | ||
792 | #[cfg(any(feature = "std", feature = "alloc"))] | |
793 | seq_impl!( | |
794 | BTreeSet<T: Eq + Ord>, | |
795 | seq, | |
ff7c6d11 | 796 | BTreeSet::clear, |
041b39d2 | 797 | BTreeSet::new(), |
ff7c6d11 | 798 | nop_reserve, |
041b39d2 XL |
799 | BTreeSet::insert); |
800 | ||
801 | #[cfg(any(feature = "std", feature = "alloc"))] | |
802 | seq_impl!( | |
803 | LinkedList<T>, | |
804 | seq, | |
ff7c6d11 | 805 | LinkedList::clear, |
041b39d2 | 806 | LinkedList::new(), |
ff7c6d11 XL |
807 | nop_reserve, |
808 | LinkedList::push_back | |
809 | ); | |
041b39d2 XL |
810 | |
811 | #[cfg(feature = "std")] | |
812 | seq_impl!( | |
813 | HashSet<T: Eq + Hash, S: BuildHasher + Default>, | |
814 | seq, | |
ff7c6d11 | 815 | HashSet::clear, |
041b39d2 | 816 | HashSet::with_capacity_and_hasher(size_hint::cautious(seq.size_hint()), S::default()), |
ff7c6d11 | 817 | HashSet::reserve, |
041b39d2 XL |
818 | HashSet::insert); |
819 | ||
041b39d2 XL |
820 | #[cfg(any(feature = "std", feature = "alloc"))] |
821 | seq_impl!( | |
822 | VecDeque<T>, | |
823 | seq, | |
ff7c6d11 | 824 | VecDeque::clear, |
041b39d2 | 825 | VecDeque::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 XL |
826 | VecDeque::reserve, |
827 | VecDeque::push_back | |
828 | ); | |
041b39d2 XL |
829 | |
830 | //////////////////////////////////////////////////////////////////////////////// | |
831 | ||
0731742a XL |
832 | #[cfg(any(feature = "std", feature = "alloc"))] |
833 | impl<'de, T> Deserialize<'de> for Vec<T> | |
834 | where | |
835 | T: Deserialize<'de>, | |
836 | { | |
837 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
838 | where | |
839 | D: Deserializer<'de>, | |
840 | { | |
841 | struct VecVisitor<T> { | |
842 | marker: PhantomData<T>, | |
843 | } | |
844 | ||
845 | impl<'de, T> Visitor<'de> for VecVisitor<T> | |
846 | where | |
847 | T: Deserialize<'de>, | |
848 | { | |
849 | type Value = Vec<T>; | |
850 | ||
851 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
852 | formatter.write_str("a sequence") | |
853 | } | |
854 | ||
855 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> | |
856 | where | |
857 | A: SeqAccess<'de>, | |
858 | { | |
859 | let mut values = Vec::with_capacity(size_hint::cautious(seq.size_hint())); | |
860 | ||
861 | while let Some(value) = try!(seq.next_element()) { | |
862 | values.push(value); | |
863 | } | |
864 | ||
865 | Ok(values) | |
866 | } | |
867 | } | |
868 | ||
869 | let visitor = VecVisitor { | |
870 | marker: PhantomData, | |
871 | }; | |
872 | deserializer.deserialize_seq(visitor) | |
873 | } | |
874 | ||
875 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
876 | where | |
877 | D: Deserializer<'de>, | |
878 | { | |
879 | struct VecInPlaceVisitor<'a, T: 'a>(&'a mut Vec<T>); | |
880 | ||
881 | impl<'a, 'de, T> Visitor<'de> for VecInPlaceVisitor<'a, T> | |
882 | where | |
883 | T: Deserialize<'de>, | |
884 | { | |
885 | type Value = (); | |
886 | ||
887 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
888 | formatter.write_str("a sequence") | |
889 | } | |
890 | ||
891 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> | |
892 | where | |
893 | A: SeqAccess<'de>, | |
894 | { | |
895 | let hint = size_hint::cautious(seq.size_hint()); | |
896 | if let Some(additional) = hint.checked_sub(self.0.len()) { | |
897 | self.0.reserve(additional); | |
898 | } | |
899 | ||
900 | for i in 0..self.0.len() { | |
901 | let next = { | |
902 | let next_place = InPlaceSeed(&mut self.0[i]); | |
903 | try!(seq.next_element_seed(next_place)) | |
904 | }; | |
905 | if next.is_none() { | |
906 | self.0.truncate(i); | |
907 | return Ok(()); | |
908 | } | |
909 | } | |
910 | ||
911 | while let Some(value) = try!(seq.next_element()) { | |
912 | self.0.push(value); | |
913 | } | |
914 | ||
915 | Ok(()) | |
916 | } | |
917 | } | |
918 | ||
919 | deserializer.deserialize_seq(VecInPlaceVisitor(place)) | |
920 | } | |
921 | } | |
922 | ||
923 | //////////////////////////////////////////////////////////////////////////////// | |
924 | ||
041b39d2 XL |
925 | struct ArrayVisitor<A> { |
926 | marker: PhantomData<A>, | |
927 | } | |
ff7c6d11 | 928 | struct ArrayInPlaceVisitor<'a, A: 'a>(&'a mut A); |
041b39d2 XL |
929 | |
930 | impl<A> ArrayVisitor<A> { | |
931 | fn new() -> Self { | |
ff7c6d11 XL |
932 | ArrayVisitor { |
933 | marker: PhantomData, | |
934 | } | |
041b39d2 XL |
935 | } |
936 | } | |
937 | ||
938 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; 0]> { | |
939 | type Value = [T; 0]; | |
940 | ||
941 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
942 | formatter.write_str("an empty array") | |
943 | } | |
944 | ||
945 | #[inline] | |
8faf50e0 | 946 | fn visit_seq<A>(self, _: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
947 | where |
948 | A: SeqAccess<'de>, | |
949 | { | |
950 | Ok([]) | |
951 | } | |
952 | } | |
953 | ||
954 | // Does not require T: Deserialize<'de>. | |
955 | impl<'de, T> Deserialize<'de> for [T; 0] { | |
8faf50e0 | 956 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
957 | where |
958 | D: Deserializer<'de>, | |
959 | { | |
960 | deserializer.deserialize_tuple(0, ArrayVisitor::<[T; 0]>::new()) | |
961 | } | |
962 | } | |
963 | ||
964 | macro_rules! array_impls { | |
965 | ($($len:expr => ($($n:tt $name:ident)+))+) => { | |
966 | $( | |
967 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; $len]> | |
968 | where | |
969 | T: Deserialize<'de>, | |
970 | { | |
971 | type Value = [T; $len]; | |
972 | ||
973 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
974 | formatter.write_str(concat!("an array of length ", $len)) | |
975 | } | |
976 | ||
977 | #[inline] | |
8faf50e0 | 978 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
979 | where |
980 | A: SeqAccess<'de>, | |
981 | { | |
982 | $( | |
983 | let $name = match try!(seq.next_element()) { | |
984 | Some(val) => val, | |
985 | None => return Err(Error::invalid_length($n, &self)), | |
986 | }; | |
987 | )+ | |
988 | ||
989 | Ok([$($name),+]) | |
990 | } | |
991 | } | |
992 | ||
ff7c6d11 XL |
993 | impl<'a, 'de, T> Visitor<'de> for ArrayInPlaceVisitor<'a, [T; $len]> |
994 | where | |
995 | T: Deserialize<'de>, | |
996 | { | |
997 | type Value = (); | |
998 | ||
999 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1000 | formatter.write_str(concat!("an array of length ", $len)) | |
1001 | } | |
1002 | ||
1003 | #[inline] | |
8faf50e0 | 1004 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1005 | where |
1006 | A: SeqAccess<'de>, | |
1007 | { | |
1008 | let mut fail_idx = None; | |
1009 | for (idx, dest) in self.0[..].iter_mut().enumerate() { | |
1010 | if try!(seq.next_element_seed(InPlaceSeed(dest))).is_none() { | |
1011 | fail_idx = Some(idx); | |
1012 | break; | |
1013 | } | |
1014 | } | |
1015 | if let Some(idx) = fail_idx { | |
1016 | return Err(Error::invalid_length(idx, &self)); | |
1017 | } | |
1018 | Ok(()) | |
1019 | } | |
1020 | } | |
1021 | ||
041b39d2 XL |
1022 | impl<'de, T> Deserialize<'de> for [T; $len] |
1023 | where | |
1024 | T: Deserialize<'de>, | |
1025 | { | |
8faf50e0 | 1026 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1027 | where |
1028 | D: Deserializer<'de>, | |
1029 | { | |
1030 | deserializer.deserialize_tuple($len, ArrayVisitor::<[T; $len]>::new()) | |
1031 | } | |
ff7c6d11 XL |
1032 | |
1033 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
1034 | where | |
1035 | D: Deserializer<'de>, | |
1036 | { | |
1037 | deserializer.deserialize_tuple($len, ArrayInPlaceVisitor(place)) | |
1038 | } | |
041b39d2 XL |
1039 | } |
1040 | )+ | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | array_impls! { | |
1045 | 1 => (0 a) | |
1046 | 2 => (0 a 1 b) | |
1047 | 3 => (0 a 1 b 2 c) | |
1048 | 4 => (0 a 1 b 2 c 3 d) | |
1049 | 5 => (0 a 1 b 2 c 3 d 4 e) | |
1050 | 6 => (0 a 1 b 2 c 3 d 4 e 5 f) | |
1051 | 7 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g) | |
1052 | 8 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h) | |
1053 | 9 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i) | |
1054 | 10 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j) | |
1055 | 11 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k) | |
1056 | 12 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l) | |
1057 | 13 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m) | |
1058 | 14 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n) | |
1059 | 15 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o) | |
1060 | 16 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p) | |
1061 | 17 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q) | |
1062 | 18 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r) | |
1063 | 19 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s) | |
1064 | 20 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t) | |
1065 | 21 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u) | |
1066 | 22 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v) | |
1067 | 23 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w) | |
1068 | 24 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x) | |
1069 | 25 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y) | |
1070 | 26 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z) | |
1071 | 27 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa) | |
1072 | 28 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab) | |
1073 | 29 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac) | |
1074 | 30 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac 29 ad) | |
1075 | 31 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac 29 ad 30 ae) | |
1076 | 32 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k 11 l 12 m 13 n 14 o 15 p 16 q 17 r 18 s 19 t 20 u 21 v 22 w 23 x 24 y 25 z 26 aa 27 ab 28 ac 29 ad 30 ae 31 af) | |
1077 | } | |
1078 | ||
1079 | //////////////////////////////////////////////////////////////////////////////// | |
1080 | ||
1081 | macro_rules! tuple_impls { | |
ff7c6d11 | 1082 | ($($len:tt => ($($n:tt $name:ident)+))+) => { |
041b39d2 | 1083 | $( |
ff7c6d11 XL |
1084 | impl<'de, $($name: Deserialize<'de>),+> Deserialize<'de> for ($($name,)+) { |
1085 | #[inline] | |
8faf50e0 | 1086 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
ff7c6d11 XL |
1087 | where |
1088 | D: Deserializer<'de>, | |
1089 | { | |
1090 | struct TupleVisitor<$($name,)+> { | |
1091 | marker: PhantomData<($($name,)+)>, | |
1092 | } | |
041b39d2 | 1093 | |
ff7c6d11 XL |
1094 | impl<'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleVisitor<$($name,)+> { |
1095 | type Value = ($($name,)+); | |
041b39d2 | 1096 | |
ff7c6d11 XL |
1097 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1098 | formatter.write_str(concat!("a tuple of size ", $len)) | |
1099 | } | |
041b39d2 | 1100 | |
ff7c6d11 XL |
1101 | #[inline] |
1102 | #[allow(non_snake_case)] | |
8faf50e0 | 1103 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1104 | where |
1105 | A: SeqAccess<'de>, | |
1106 | { | |
1107 | $( | |
1108 | let $name = match try!(seq.next_element()) { | |
1109 | Some(value) => value, | |
1110 | None => return Err(Error::invalid_length($n, &self)), | |
1111 | }; | |
1112 | )+ | |
041b39d2 | 1113 | |
ff7c6d11 XL |
1114 | Ok(($($name,)+)) |
1115 | } | |
1116 | } | |
041b39d2 | 1117 | |
ff7c6d11 | 1118 | deserializer.deserialize_tuple($len, TupleVisitor { marker: PhantomData }) |
041b39d2 | 1119 | } |
041b39d2 | 1120 | |
041b39d2 | 1121 | #[inline] |
ff7c6d11 | 1122 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
041b39d2 XL |
1123 | where |
1124 | D: Deserializer<'de>, | |
1125 | { | |
ff7c6d11 XL |
1126 | struct TupleInPlaceVisitor<'a, $($name: 'a,)+>(&'a mut ($($name,)+)); |
1127 | ||
1128 | impl<'a, 'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleInPlaceVisitor<'a, $($name,)+> { | |
1129 | type Value = (); | |
1130 | ||
1131 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1132 | formatter.write_str(concat!("a tuple of size ", $len)) | |
1133 | } | |
1134 | ||
1135 | #[inline] | |
1136 | #[allow(non_snake_case)] | |
8faf50e0 | 1137 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1138 | where |
1139 | A: SeqAccess<'de>, | |
1140 | { | |
1141 | $( | |
1142 | if try!(seq.next_element_seed(InPlaceSeed(&mut (self.0).$n))).is_none() { | |
1143 | return Err(Error::invalid_length($n, &self)); | |
1144 | } | |
1145 | )+ | |
1146 | ||
1147 | Ok(()) | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | deserializer.deserialize_tuple($len, TupleInPlaceVisitor(place)) | |
041b39d2 XL |
1152 | } |
1153 | } | |
1154 | )+ | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | tuple_impls! { | |
ff7c6d11 XL |
1159 | 1 => (0 T0) |
1160 | 2 => (0 T0 1 T1) | |
1161 | 3 => (0 T0 1 T1 2 T2) | |
1162 | 4 => (0 T0 1 T1 2 T2 3 T3) | |
1163 | 5 => (0 T0 1 T1 2 T2 3 T3 4 T4) | |
1164 | 6 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5) | |
1165 | 7 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6) | |
1166 | 8 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7) | |
1167 | 9 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8) | |
1168 | 10 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9) | |
1169 | 11 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10) | |
1170 | 12 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11) | |
1171 | 13 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12) | |
1172 | 14 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13) | |
1173 | 15 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14) | |
1174 | 16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15) | |
041b39d2 XL |
1175 | } |
1176 | ||
1177 | //////////////////////////////////////////////////////////////////////////////// | |
1178 | ||
1179 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1180 | macro_rules! map_impl { | |
1181 | ( | |
1182 | $ty:ident < K $(: $kbound1:ident $(+ $kbound2:ident)*)*, V $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
1183 | $access:ident, | |
041b39d2 XL |
1184 | $with_capacity:expr |
1185 | ) => { | |
1186 | impl<'de, K, V $(, $typaram)*> Deserialize<'de> for $ty<K, V $(, $typaram)*> | |
1187 | where | |
1188 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1189 | V: Deserialize<'de>, | |
1190 | $($typaram: $bound1 $(+ $bound2)*),* | |
1191 | { | |
1192 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1193 | where | |
1194 | D: Deserializer<'de>, | |
1195 | { | |
1196 | struct MapVisitor<K, V $(, $typaram)*> { | |
1197 | marker: PhantomData<$ty<K, V $(, $typaram)*>>, | |
1198 | } | |
1199 | ||
1200 | impl<'de, K, V $(, $typaram)*> Visitor<'de> for MapVisitor<K, V $(, $typaram)*> | |
1201 | where | |
1202 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1203 | V: Deserialize<'de>, | |
1204 | $($typaram: $bound1 $(+ $bound2)*),* | |
1205 | { | |
1206 | type Value = $ty<K, V $(, $typaram)*>; | |
1207 | ||
1208 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1209 | formatter.write_str("a map") | |
1210 | } | |
1211 | ||
1212 | #[inline] | |
1213 | fn visit_map<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
1214 | where | |
1215 | A: MapAccess<'de>, | |
1216 | { | |
1217 | let mut values = $with_capacity; | |
1218 | ||
1219 | while let Some((key, value)) = try!($access.next_entry()) { | |
1220 | values.insert(key, value); | |
1221 | } | |
1222 | ||
1223 | Ok(values) | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | let visitor = MapVisitor { marker: PhantomData }; | |
1228 | deserializer.deserialize_map(visitor) | |
1229 | } | |
1230 | } | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1235 | map_impl!( | |
1236 | BTreeMap<K: Ord, V>, | |
1237 | map, | |
041b39d2 XL |
1238 | BTreeMap::new()); |
1239 | ||
1240 | #[cfg(feature = "std")] | |
1241 | map_impl!( | |
1242 | HashMap<K: Eq + Hash, V, S: BuildHasher + Default>, | |
1243 | map, | |
041b39d2 XL |
1244 | HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default())); |
1245 | ||
1246 | //////////////////////////////////////////////////////////////////////////////// | |
1247 | ||
1248 | #[cfg(feature = "std")] | |
abe05a73 | 1249 | macro_rules! parse_ip_impl { |
8faf50e0 | 1250 | ($expecting:tt $ty:ty; $size:tt) => { |
041b39d2 XL |
1251 | impl<'de> Deserialize<'de> for $ty { |
1252 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1253 | where | |
1254 | D: Deserializer<'de>, | |
1255 | { | |
abe05a73 | 1256 | if deserializer.is_human_readable() { |
8faf50e0 XL |
1257 | struct IpAddrVisitor; |
1258 | ||
1259 | impl<'de> Visitor<'de> for IpAddrVisitor { | |
1260 | type Value = $ty; | |
1261 | ||
1262 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1263 | formatter.write_str($expecting) | |
1264 | } | |
1265 | ||
1266 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
1267 | where | |
1268 | E: Error, | |
1269 | { | |
1270 | s.parse().map_err(Error::custom) | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | deserializer.deserialize_str(IpAddrVisitor) | |
abe05a73 XL |
1275 | } else { |
1276 | <[u8; $size]>::deserialize(deserializer).map(<$ty>::from) | |
1277 | } | |
1278 | } | |
1279 | } | |
83c7162d | 1280 | }; |
abe05a73 XL |
1281 | } |
1282 | ||
1283 | #[cfg(feature = "std")] | |
1284 | macro_rules! variant_identifier { | |
1285 | ( | |
1286 | $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1287 | $expecting_message: expr, | |
1288 | $variants_name: ident | |
1289 | ) => { | |
1290 | enum $name_kind { | |
1291 | $( $variant ),* | |
1292 | } | |
1293 | ||
1294 | static $variants_name: &'static [&'static str] = &[ $( stringify!($variant) ),*]; | |
1295 | ||
1296 | impl<'de> Deserialize<'de> for $name_kind { | |
1297 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1298 | where | |
1299 | D: Deserializer<'de>, | |
1300 | { | |
1301 | struct KindVisitor; | |
1302 | ||
1303 | impl<'de> Visitor<'de> for KindVisitor { | |
1304 | type Value = $name_kind; | |
1305 | ||
1306 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1307 | formatter.write_str($expecting_message) | |
1308 | } | |
1309 | ||
1310 | fn visit_u32<E>(self, value: u32) -> Result<Self::Value, E> | |
1311 | where | |
1312 | E: Error, | |
1313 | { | |
1314 | match value { | |
1315 | $( | |
1316 | $index => Ok($name_kind :: $variant), | |
1317 | )* | |
1318 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value as u64), &self),), | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
1323 | where | |
1324 | E: Error, | |
1325 | { | |
1326 | match value { | |
1327 | $( | |
1328 | stringify!($variant) => Ok($name_kind :: $variant), | |
1329 | )* | |
1330 | _ => Err(Error::unknown_variant(value, $variants_name)), | |
1331 | } | |
1332 | } | |
1333 | ||
1334 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> | |
1335 | where | |
1336 | E: Error, | |
1337 | { | |
1338 | match value { | |
1339 | $( | |
1340 | $bytes => Ok($name_kind :: $variant), | |
1341 | )* | |
1342 | _ => { | |
1343 | match str::from_utf8(value) { | |
1344 | Ok(value) => Err(Error::unknown_variant(value, $variants_name)), | |
1345 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(value), &self)), | |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | deserializer.deserialize_identifier(KindVisitor) | |
1353 | } | |
1354 | } | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | #[cfg(feature = "std")] | |
1359 | macro_rules! deserialize_enum { | |
1360 | ( | |
1361 | $name: ident $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1362 | $expecting_message: expr, | |
1363 | $deserializer: expr | |
1364 | ) => { | |
1365 | variant_identifier!{ | |
1366 | $name_kind ( $($variant; $bytes; $index),* ) | |
1367 | $expecting_message, | |
1368 | VARIANTS | |
1369 | } | |
1370 | ||
1371 | struct EnumVisitor; | |
1372 | impl<'de> Visitor<'de> for EnumVisitor { | |
1373 | type Value = $name; | |
1374 | ||
1375 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1376 | formatter.write_str(concat!("a ", stringify!($name))) | |
1377 | } | |
1378 | ||
1379 | ||
1380 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> | |
1381 | where | |
1382 | A: EnumAccess<'de>, | |
1383 | { | |
1384 | match try!(data.variant()) { | |
1385 | $( | |
1386 | ($name_kind :: $variant, v) => v.newtype_variant().map($name :: $variant), | |
1387 | )* | |
1388 | } | |
1389 | } | |
1390 | } | |
1391 | $deserializer.deserialize_enum(stringify!($name), VARIANTS, EnumVisitor) | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | #[cfg(feature = "std")] | |
1396 | impl<'de> Deserialize<'de> for net::IpAddr { | |
1397 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1398 | where | |
1399 | D: Deserializer<'de>, | |
1400 | { | |
1401 | if deserializer.is_human_readable() { | |
8faf50e0 XL |
1402 | struct IpAddrVisitor; |
1403 | ||
1404 | impl<'de> Visitor<'de> for IpAddrVisitor { | |
1405 | type Value = net::IpAddr; | |
1406 | ||
1407 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1408 | formatter.write_str("IP address") | |
1409 | } | |
1410 | ||
1411 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
1412 | where | |
1413 | E: Error, | |
1414 | { | |
1415 | s.parse().map_err(Error::custom) | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | deserializer.deserialize_str(IpAddrVisitor) | |
abe05a73 XL |
1420 | } else { |
1421 | use lib::net::IpAddr; | |
0731742a | 1422 | deserialize_enum! { |
abe05a73 XL |
1423 | IpAddr IpAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) |
1424 | "`V4` or `V6`", | |
1425 | deserializer | |
041b39d2 XL |
1426 | } |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | #[cfg(feature = "std")] | |
8faf50e0 | 1432 | parse_ip_impl!("IPv4 address" net::Ipv4Addr; 4); |
041b39d2 XL |
1433 | |
1434 | #[cfg(feature = "std")] | |
8faf50e0 | 1435 | parse_ip_impl!("IPv6 address" net::Ipv6Addr; 16); |
041b39d2 XL |
1436 | |
1437 | #[cfg(feature = "std")] | |
abe05a73 | 1438 | macro_rules! parse_socket_impl { |
8faf50e0 | 1439 | ($expecting:tt $ty:ty, $new:expr) => { |
abe05a73 XL |
1440 | impl<'de> Deserialize<'de> for $ty { |
1441 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1442 | where | |
1443 | D: Deserializer<'de>, | |
1444 | { | |
1445 | if deserializer.is_human_readable() { | |
8faf50e0 XL |
1446 | struct SocketAddrVisitor; |
1447 | ||
1448 | impl<'de> Visitor<'de> for SocketAddrVisitor { | |
1449 | type Value = $ty; | |
1450 | ||
1451 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1452 | formatter.write_str($expecting) | |
1453 | } | |
1454 | ||
1455 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
1456 | where | |
1457 | E: Error, | |
1458 | { | |
1459 | s.parse().map_err(Error::custom) | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | deserializer.deserialize_str(SocketAddrVisitor) | |
abe05a73 XL |
1464 | } else { |
1465 | <(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port)) | |
1466 | } | |
1467 | } | |
1468 | } | |
83c7162d | 1469 | }; |
abe05a73 | 1470 | } |
041b39d2 XL |
1471 | |
1472 | #[cfg(feature = "std")] | |
abe05a73 XL |
1473 | impl<'de> Deserialize<'de> for net::SocketAddr { |
1474 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1475 | where | |
1476 | D: Deserializer<'de>, | |
1477 | { | |
1478 | if deserializer.is_human_readable() { | |
8faf50e0 XL |
1479 | struct SocketAddrVisitor; |
1480 | ||
1481 | impl<'de> Visitor<'de> for SocketAddrVisitor { | |
1482 | type Value = net::SocketAddr; | |
1483 | ||
1484 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1485 | formatter.write_str("socket address") | |
1486 | } | |
1487 | ||
1488 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
1489 | where | |
1490 | E: Error, | |
1491 | { | |
1492 | s.parse().map_err(Error::custom) | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | deserializer.deserialize_str(SocketAddrVisitor) | |
abe05a73 XL |
1497 | } else { |
1498 | use lib::net::SocketAddr; | |
0731742a | 1499 | deserialize_enum! { |
abe05a73 XL |
1500 | SocketAddr SocketAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) |
1501 | "`V4` or `V6`", | |
1502 | deserializer | |
1503 | } | |
1504 | } | |
1505 | } | |
1506 | } | |
041b39d2 XL |
1507 | |
1508 | #[cfg(feature = "std")] | |
8faf50e0 | 1509 | parse_socket_impl!("IPv4 socket address" net::SocketAddrV4, net::SocketAddrV4::new); |
041b39d2 XL |
1510 | |
1511 | #[cfg(feature = "std")] | |
8faf50e0 | 1512 | parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |ip, port| net::SocketAddrV6::new( |
83c7162d | 1513 | ip, port, 0, 0 |
ff7c6d11 | 1514 | )); |
041b39d2 XL |
1515 | |
1516 | //////////////////////////////////////////////////////////////////////////////// | |
1517 | ||
1518 | #[cfg(feature = "std")] | |
1519 | struct PathVisitor; | |
1520 | ||
1521 | #[cfg(feature = "std")] | |
1522 | impl<'a> Visitor<'a> for PathVisitor { | |
1523 | type Value = &'a Path; | |
1524 | ||
1525 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1526 | formatter.write_str("a borrowed path") | |
1527 | } | |
1528 | ||
1529 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
1530 | where | |
1531 | E: Error, | |
1532 | { | |
1533 | Ok(v.as_ref()) | |
1534 | } | |
1535 | ||
1536 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
1537 | where | |
1538 | E: Error, | |
1539 | { | |
1540 | str::from_utf8(v) | |
1541 | .map(AsRef::as_ref) | |
1542 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | #[cfg(feature = "std")] | |
1547 | impl<'de: 'a, 'a> Deserialize<'de> for &'a Path { | |
1548 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1549 | where | |
1550 | D: Deserializer<'de>, | |
1551 | { | |
1552 | deserializer.deserialize_str(PathVisitor) | |
1553 | } | |
1554 | } | |
1555 | ||
1556 | #[cfg(feature = "std")] | |
1557 | struct PathBufVisitor; | |
1558 | ||
1559 | #[cfg(feature = "std")] | |
1560 | impl<'de> Visitor<'de> for PathBufVisitor { | |
1561 | type Value = PathBuf; | |
1562 | ||
1563 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1564 | formatter.write_str("path string") | |
1565 | } | |
1566 | ||
8faf50e0 | 1567 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
1568 | where |
1569 | E: Error, | |
1570 | { | |
1571 | Ok(From::from(v)) | |
1572 | } | |
1573 | ||
8faf50e0 | 1574 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
1575 | where |
1576 | E: Error, | |
1577 | { | |
1578 | Ok(From::from(v)) | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | #[cfg(feature = "std")] | |
1583 | impl<'de> Deserialize<'de> for PathBuf { | |
8faf50e0 | 1584 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1585 | where |
1586 | D: Deserializer<'de>, | |
1587 | { | |
1588 | deserializer.deserialize_string(PathBufVisitor) | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | //////////////////////////////////////////////////////////////////////////////// | |
1593 | ||
1594 | // If this were outside of the serde crate, it would just use: | |
1595 | // | |
1596 | // #[derive(Deserialize)] | |
1597 | // #[serde(variant_identifier)] | |
1598 | #[cfg(all(feature = "std", any(unix, windows)))] | |
0731742a | 1599 | variant_identifier! { |
abe05a73 XL |
1600 | OsStringKind (Unix; b"Unix"; 0, Windows; b"Windows"; 1) |
1601 | "`Unix` or `Windows`", | |
1602 | OSSTR_VARIANTS | |
041b39d2 XL |
1603 | } |
1604 | ||
1605 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1606 | struct OsStringVisitor; | |
1607 | ||
1608 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1609 | impl<'de> Visitor<'de> for OsStringVisitor { | |
1610 | type Value = OsString; | |
1611 | ||
1612 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1613 | formatter.write_str("os string") | |
1614 | } | |
1615 | ||
1616 | #[cfg(unix)] | |
8faf50e0 | 1617 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1618 | where |
1619 | A: EnumAccess<'de>, | |
1620 | { | |
1621 | use std::os::unix::ffi::OsStringExt; | |
1622 | ||
1623 | match try!(data.variant()) { | |
1624 | (OsStringKind::Unix, v) => v.newtype_variant().map(OsString::from_vec), | |
ff7c6d11 XL |
1625 | (OsStringKind::Windows, _) => Err(Error::custom( |
1626 | "cannot deserialize Windows OS string on Unix", | |
1627 | )), | |
041b39d2 XL |
1628 | } |
1629 | } | |
1630 | ||
1631 | #[cfg(windows)] | |
8faf50e0 | 1632 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1633 | where |
1634 | A: EnumAccess<'de>, | |
1635 | { | |
1636 | use std::os::windows::ffi::OsStringExt; | |
1637 | ||
1638 | match try!(data.variant()) { | |
8faf50e0 XL |
1639 | (OsStringKind::Windows, v) => v |
1640 | .newtype_variant::<Vec<u16>>() | |
ff7c6d11 XL |
1641 | .map(|vec| OsString::from_wide(&vec)), |
1642 | (OsStringKind::Unix, _) => Err(Error::custom( | |
1643 | "cannot deserialize Unix OS string on Windows", | |
1644 | )), | |
041b39d2 XL |
1645 | } |
1646 | } | |
1647 | } | |
1648 | ||
1649 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1650 | impl<'de> Deserialize<'de> for OsString { | |
8faf50e0 | 1651 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1652 | where |
1653 | D: Deserializer<'de>, | |
1654 | { | |
1655 | deserializer.deserialize_enum("OsString", OSSTR_VARIANTS, OsStringVisitor) | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | //////////////////////////////////////////////////////////////////////////////// | |
1660 | ||
1661 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1662 | forwarded_impl!((T), Box<T>, Box::new); |
041b39d2 XL |
1663 | |
1664 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1665 | forwarded_impl!((T), Box<[T]>, Vec::into_boxed_slice); |
041b39d2 XL |
1666 | |
1667 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1668 | forwarded_impl!((), Box<str>, String::into_boxed_str); |
041b39d2 | 1669 | |
b7449926 XL |
1670 | #[cfg(all( |
1671 | not(de_rc_dst), | |
1672 | feature = "rc", | |
1673 | any(feature = "std", feature = "alloc") | |
1674 | ))] | |
83c7162d XL |
1675 | forwarded_impl! { |
1676 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1677 | /// | |
1678 | /// Deserializing a data structure containing `Arc` will not attempt to | |
1679 | /// deduplicate `Arc` references to the same data. Every deserialized `Arc` | |
1680 | /// will end up with a strong count of 1. | |
1681 | /// | |
1682 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1683 | (T), Arc<T>, Arc::new | |
1684 | } | |
041b39d2 | 1685 | |
b7449926 XL |
1686 | #[cfg(all( |
1687 | not(de_rc_dst), | |
1688 | feature = "rc", | |
1689 | any(feature = "std", feature = "alloc") | |
1690 | ))] | |
83c7162d XL |
1691 | forwarded_impl! { |
1692 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1693 | /// | |
1694 | /// Deserializing a data structure containing `Rc` will not attempt to | |
1695 | /// deduplicate `Rc` references to the same data. Every deserialized `Rc` | |
1696 | /// will end up with a strong count of 1. | |
1697 | /// | |
1698 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1699 | (T), Rc<T>, Rc::new | |
1700 | } | |
041b39d2 XL |
1701 | |
1702 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1703 | impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T> | |
1704 | where | |
1705 | T: ToOwned, | |
1706 | T::Owned: Deserialize<'de>, | |
1707 | { | |
1708 | #[inline] | |
8faf50e0 | 1709 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1710 | where |
1711 | D: Deserializer<'de>, | |
1712 | { | |
1713 | T::Owned::deserialize(deserializer).map(Cow::Owned) | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | //////////////////////////////////////////////////////////////////////////////// | |
ea8adc8c | 1718 | |
8faf50e0 XL |
1719 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting |
1720 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. | |
1721 | /// | |
1722 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1723 | #[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))] | |
1724 | impl<'de, T: ?Sized> Deserialize<'de> for RcWeak<T> | |
1725 | where | |
1726 | T: Deserialize<'de>, | |
1727 | { | |
1728 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1729 | where | |
1730 | D: Deserializer<'de>, | |
1731 | { | |
1732 | try!(Option::<T>::deserialize(deserializer)); | |
1733 | Ok(RcWeak::new()) | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting | |
1738 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. | |
1739 | /// | |
1740 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1741 | #[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))] | |
1742 | impl<'de, T: ?Sized> Deserialize<'de> for ArcWeak<T> | |
1743 | where | |
1744 | T: Deserialize<'de>, | |
1745 | { | |
1746 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1747 | where | |
1748 | D: Deserializer<'de>, | |
1749 | { | |
1750 | try!(Option::<T>::deserialize(deserializer)); | |
1751 | Ok(ArcWeak::new()) | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | //////////////////////////////////////////////////////////////////////////////// | |
1756 | ||
0731742a | 1757 | #[cfg(all(de_rc_dst, feature = "rc", any(feature = "std", feature = "alloc")))] |
ea8adc8c | 1758 | macro_rules! box_forwarded_impl { |
83c7162d XL |
1759 | ( |
1760 | $(#[doc = $doc:tt])* | |
1761 | $t:ident | |
1762 | ) => { | |
1763 | $(#[doc = $doc])* | |
ea8adc8c XL |
1764 | impl<'de, T: ?Sized> Deserialize<'de> for $t<T> |
1765 | where | |
1766 | Box<T>: Deserialize<'de>, | |
1767 | { | |
1768 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1769 | where | |
1770 | D: Deserializer<'de>, | |
1771 | { | |
1772 | Box::deserialize(deserializer).map(Into::into) | |
1773 | } | |
1774 | } | |
83c7162d | 1775 | }; |
ea8adc8c XL |
1776 | } |
1777 | ||
0731742a | 1778 | #[cfg(all(de_rc_dst, feature = "rc", any(feature = "std", feature = "alloc")))] |
83c7162d XL |
1779 | box_forwarded_impl! { |
1780 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1781 | /// | |
1782 | /// Deserializing a data structure containing `Rc` will not attempt to | |
1783 | /// deduplicate `Rc` references to the same data. Every deserialized `Rc` | |
1784 | /// will end up with a strong count of 1. | |
1785 | /// | |
1786 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1787 | Rc | |
1788 | } | |
ea8adc8c | 1789 | |
0731742a | 1790 | #[cfg(all(de_rc_dst, feature = "rc", any(feature = "std", feature = "alloc")))] |
83c7162d XL |
1791 | box_forwarded_impl! { |
1792 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1793 | /// | |
1794 | /// Deserializing a data structure containing `Arc` will not attempt to | |
1795 | /// deduplicate `Arc` references to the same data. Every deserialized `Arc` | |
1796 | /// will end up with a strong count of 1. | |
1797 | /// | |
1798 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1799 | Arc | |
1800 | } | |
ea8adc8c XL |
1801 | |
1802 | //////////////////////////////////////////////////////////////////////////////// | |
041b39d2 XL |
1803 | |
1804 | impl<'de, T> Deserialize<'de> for Cell<T> | |
1805 | where | |
1806 | T: Deserialize<'de> + Copy, | |
1807 | { | |
8faf50e0 | 1808 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1809 | where |
1810 | D: Deserializer<'de>, | |
1811 | { | |
1812 | T::deserialize(deserializer).map(Cell::new) | |
1813 | } | |
1814 | } | |
1815 | ||
3b2f2976 | 1816 | forwarded_impl!((T), RefCell<T>, RefCell::new); |
041b39d2 XL |
1817 | |
1818 | #[cfg(feature = "std")] | |
3b2f2976 | 1819 | forwarded_impl!((T), Mutex<T>, Mutex::new); |
041b39d2 XL |
1820 | |
1821 | #[cfg(feature = "std")] | |
3b2f2976 | 1822 | forwarded_impl!((T), RwLock<T>, RwLock::new); |
041b39d2 XL |
1823 | |
1824 | //////////////////////////////////////////////////////////////////////////////// | |
1825 | ||
1826 | // This is a cleaned-up version of the impl generated by: | |
1827 | // | |
1828 | // #[derive(Deserialize)] | |
1829 | // #[serde(deny_unknown_fields)] | |
1830 | // struct Duration { | |
1831 | // secs: u64, | |
1832 | // nanos: u32, | |
1833 | // } | |
8faf50e0 | 1834 | #[cfg(any(core_duration, feature = "std"))] |
041b39d2 XL |
1835 | impl<'de> Deserialize<'de> for Duration { |
1836 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1837 | where | |
1838 | D: Deserializer<'de>, | |
1839 | { | |
1840 | // If this were outside of the serde crate, it would just use: | |
1841 | // | |
1842 | // #[derive(Deserialize)] | |
1843 | // #[serde(field_identifier, rename_all = "lowercase")] | |
1844 | enum Field { | |
1845 | Secs, | |
1846 | Nanos, | |
1847 | }; | |
1848 | ||
1849 | impl<'de> Deserialize<'de> for Field { | |
8faf50e0 | 1850 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1851 | where |
1852 | D: Deserializer<'de>, | |
1853 | { | |
1854 | struct FieldVisitor; | |
1855 | ||
1856 | impl<'de> Visitor<'de> for FieldVisitor { | |
1857 | type Value = Field; | |
1858 | ||
1859 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1860 | formatter.write_str("`secs` or `nanos`") | |
1861 | } | |
1862 | ||
8faf50e0 | 1863 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
1864 | where |
1865 | E: Error, | |
1866 | { | |
1867 | match value { | |
1868 | "secs" => Ok(Field::Secs), | |
1869 | "nanos" => Ok(Field::Nanos), | |
1870 | _ => Err(Error::unknown_field(value, FIELDS)), | |
1871 | } | |
1872 | } | |
1873 | ||
8faf50e0 | 1874 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
1875 | where |
1876 | E: Error, | |
1877 | { | |
1878 | match value { | |
1879 | b"secs" => Ok(Field::Secs), | |
1880 | b"nanos" => Ok(Field::Nanos), | |
1881 | _ => { | |
8faf50e0 | 1882 | let value = ::export::from_utf8_lossy(value); |
041b39d2 XL |
1883 | Err(Error::unknown_field(&value, FIELDS)) |
1884 | } | |
1885 | } | |
1886 | } | |
1887 | } | |
1888 | ||
1889 | deserializer.deserialize_identifier(FieldVisitor) | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | struct DurationVisitor; | |
1894 | ||
1895 | impl<'de> Visitor<'de> for DurationVisitor { | |
1896 | type Value = Duration; | |
1897 | ||
1898 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1899 | formatter.write_str("struct Duration") | |
1900 | } | |
1901 | ||
8faf50e0 | 1902 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1903 | where |
1904 | A: SeqAccess<'de>, | |
1905 | { | |
1906 | let secs: u64 = match try!(seq.next_element()) { | |
1907 | Some(value) => value, | |
1908 | None => { | |
1909 | return Err(Error::invalid_length(0, &self)); | |
1910 | } | |
1911 | }; | |
1912 | let nanos: u32 = match try!(seq.next_element()) { | |
1913 | Some(value) => value, | |
1914 | None => { | |
1915 | return Err(Error::invalid_length(1, &self)); | |
1916 | } | |
1917 | }; | |
1918 | Ok(Duration::new(secs, nanos)) | |
1919 | } | |
1920 | ||
8faf50e0 | 1921 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1922 | where |
1923 | A: MapAccess<'de>, | |
1924 | { | |
1925 | let mut secs: Option<u64> = None; | |
1926 | let mut nanos: Option<u32> = None; | |
1927 | while let Some(key) = try!(map.next_key()) { | |
1928 | match key { | |
1929 | Field::Secs => { | |
1930 | if secs.is_some() { | |
1931 | return Err(<A::Error as Error>::duplicate_field("secs")); | |
1932 | } | |
1933 | secs = Some(try!(map.next_value())); | |
1934 | } | |
1935 | Field::Nanos => { | |
1936 | if nanos.is_some() { | |
1937 | return Err(<A::Error as Error>::duplicate_field("nanos")); | |
1938 | } | |
1939 | nanos = Some(try!(map.next_value())); | |
1940 | } | |
1941 | } | |
1942 | } | |
1943 | let secs = match secs { | |
1944 | Some(secs) => secs, | |
1945 | None => return Err(<A::Error as Error>::missing_field("secs")), | |
1946 | }; | |
1947 | let nanos = match nanos { | |
1948 | Some(nanos) => nanos, | |
1949 | None => return Err(<A::Error as Error>::missing_field("nanos")), | |
1950 | }; | |
1951 | Ok(Duration::new(secs, nanos)) | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | const FIELDS: &'static [&'static str] = &["secs", "nanos"]; | |
1956 | deserializer.deserialize_struct("Duration", FIELDS, DurationVisitor) | |
1957 | } | |
1958 | } | |
1959 | ||
1960 | //////////////////////////////////////////////////////////////////////////////// | |
1961 | ||
1962 | #[cfg(feature = "std")] | |
1963 | impl<'de> Deserialize<'de> for SystemTime { | |
1964 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1965 | where | |
1966 | D: Deserializer<'de>, | |
1967 | { | |
1968 | // Reuse duration | |
1969 | enum Field { | |
1970 | Secs, | |
1971 | Nanos, | |
1972 | }; | |
1973 | ||
1974 | impl<'de> Deserialize<'de> for Field { | |
8faf50e0 | 1975 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1976 | where |
1977 | D: Deserializer<'de>, | |
1978 | { | |
1979 | struct FieldVisitor; | |
1980 | ||
1981 | impl<'de> Visitor<'de> for FieldVisitor { | |
1982 | type Value = Field; | |
1983 | ||
1984 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1985 | formatter.write_str("`secs_since_epoch` or `nanos_since_epoch`") | |
1986 | } | |
1987 | ||
8faf50e0 | 1988 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
1989 | where |
1990 | E: Error, | |
1991 | { | |
1992 | match value { | |
1993 | "secs_since_epoch" => Ok(Field::Secs), | |
1994 | "nanos_since_epoch" => Ok(Field::Nanos), | |
1995 | _ => Err(Error::unknown_field(value, FIELDS)), | |
1996 | } | |
1997 | } | |
1998 | ||
8faf50e0 | 1999 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
2000 | where |
2001 | E: Error, | |
2002 | { | |
2003 | match value { | |
2004 | b"secs_since_epoch" => Ok(Field::Secs), | |
2005 | b"nanos_since_epoch" => Ok(Field::Nanos), | |
2006 | _ => { | |
2007 | let value = String::from_utf8_lossy(value); | |
2008 | Err(Error::unknown_field(&value, FIELDS)) | |
2009 | } | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | deserializer.deserialize_identifier(FieldVisitor) | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | struct DurationVisitor; | |
2019 | ||
2020 | impl<'de> Visitor<'de> for DurationVisitor { | |
2021 | type Value = Duration; | |
2022 | ||
2023 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2024 | formatter.write_str("struct SystemTime") | |
2025 | } | |
2026 | ||
8faf50e0 | 2027 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2028 | where |
2029 | A: SeqAccess<'de>, | |
2030 | { | |
2031 | let secs: u64 = match try!(seq.next_element()) { | |
2032 | Some(value) => value, | |
2033 | None => { | |
2034 | return Err(Error::invalid_length(0, &self)); | |
2035 | } | |
2036 | }; | |
2037 | let nanos: u32 = match try!(seq.next_element()) { | |
2038 | Some(value) => value, | |
2039 | None => { | |
2040 | return Err(Error::invalid_length(1, &self)); | |
2041 | } | |
2042 | }; | |
2043 | Ok(Duration::new(secs, nanos)) | |
2044 | } | |
2045 | ||
8faf50e0 | 2046 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2047 | where |
2048 | A: MapAccess<'de>, | |
2049 | { | |
2050 | let mut secs: Option<u64> = None; | |
2051 | let mut nanos: Option<u32> = None; | |
2052 | while let Some(key) = try!(map.next_key()) { | |
2053 | match key { | |
2054 | Field::Secs => { | |
2055 | if secs.is_some() { | |
ff7c6d11 XL |
2056 | return Err(<A::Error as Error>::duplicate_field( |
2057 | "secs_since_epoch", | |
2058 | )); | |
041b39d2 XL |
2059 | } |
2060 | secs = Some(try!(map.next_value())); | |
2061 | } | |
2062 | Field::Nanos => { | |
2063 | if nanos.is_some() { | |
ff7c6d11 XL |
2064 | return Err(<A::Error as Error>::duplicate_field( |
2065 | "nanos_since_epoch", | |
2066 | )); | |
041b39d2 XL |
2067 | } |
2068 | nanos = Some(try!(map.next_value())); | |
2069 | } | |
2070 | } | |
2071 | } | |
2072 | let secs = match secs { | |
2073 | Some(secs) => secs, | |
2074 | None => return Err(<A::Error as Error>::missing_field("secs_since_epoch")), | |
2075 | }; | |
2076 | let nanos = match nanos { | |
2077 | Some(nanos) => nanos, | |
2078 | None => return Err(<A::Error as Error>::missing_field("nanos_since_epoch")), | |
2079 | }; | |
2080 | Ok(Duration::new(secs, nanos)) | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | const FIELDS: &'static [&'static str] = &["secs_since_epoch", "nanos_since_epoch"]; | |
2085 | let duration = try!(deserializer.deserialize_struct("SystemTime", FIELDS, DurationVisitor)); | |
2086 | Ok(UNIX_EPOCH + duration) | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | //////////////////////////////////////////////////////////////////////////////// | |
2091 | ||
2092 | // Similar to: | |
2093 | // | |
2094 | // #[derive(Deserialize)] | |
2095 | // #[serde(deny_unknown_fields)] | |
2096 | // struct Range { | |
2097 | // start: u64, | |
2098 | // end: u32, | |
2099 | // } | |
b7449926 | 2100 | impl<'de, Idx> Deserialize<'de> for Range<Idx> |
041b39d2 XL |
2101 | where |
2102 | Idx: Deserialize<'de>, | |
2103 | { | |
2104 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2105 | where | |
2106 | D: Deserializer<'de>, | |
2107 | { | |
b7449926 XL |
2108 | let (start, end) = deserializer.deserialize_struct( |
2109 | "Range", | |
2110 | range::FIELDS, | |
2111 | range::RangeVisitor { | |
2112 | expecting: "struct Range", | |
2113 | phantom: PhantomData, | |
2114 | }, | |
2115 | )?; | |
2116 | Ok(start..end) | |
2117 | } | |
2118 | } | |
041b39d2 | 2119 | |
b7449926 XL |
2120 | #[cfg(range_inclusive)] |
2121 | impl<'de, Idx> Deserialize<'de> for RangeInclusive<Idx> | |
2122 | where | |
2123 | Idx: Deserialize<'de>, | |
2124 | { | |
2125 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2126 | where | |
2127 | D: Deserializer<'de>, | |
2128 | { | |
2129 | let (start, end) = deserializer.deserialize_struct( | |
2130 | "RangeInclusive", | |
2131 | range::FIELDS, | |
2132 | range::RangeVisitor { | |
2133 | expecting: "struct RangeInclusive", | |
2134 | phantom: PhantomData, | |
2135 | }, | |
2136 | )?; | |
2137 | Ok(RangeInclusive::new(start, end)) | |
2138 | } | |
2139 | } | |
041b39d2 | 2140 | |
b7449926 XL |
2141 | mod range { |
2142 | use lib::*; | |
041b39d2 | 2143 | |
b7449926 | 2144 | use de::{Deserialize, Deserializer, Error, MapAccess, SeqAccess, Visitor}; |
041b39d2 | 2145 | |
b7449926 XL |
2146 | pub const FIELDS: &'static [&'static str] = &["start", "end"]; |
2147 | ||
2148 | // If this were outside of the serde crate, it would just use: | |
2149 | // | |
2150 | // #[derive(Deserialize)] | |
2151 | // #[serde(field_identifier, rename_all = "lowercase")] | |
2152 | enum Field { | |
2153 | Start, | |
2154 | End, | |
2155 | } | |
2156 | ||
2157 | impl<'de> Deserialize<'de> for Field { | |
2158 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2159 | where | |
2160 | D: Deserializer<'de>, | |
2161 | { | |
2162 | struct FieldVisitor; | |
2163 | ||
2164 | impl<'de> Visitor<'de> for FieldVisitor { | |
2165 | type Value = Field; | |
2166 | ||
2167 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2168 | formatter.write_str("`start` or `end`") | |
2169 | } | |
2170 | ||
2171 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
2172 | where | |
2173 | E: Error, | |
2174 | { | |
2175 | match value { | |
2176 | "start" => Ok(Field::Start), | |
2177 | "end" => Ok(Field::End), | |
2178 | _ => Err(Error::unknown_field(value, FIELDS)), | |
041b39d2 | 2179 | } |
b7449926 | 2180 | } |
041b39d2 | 2181 | |
b7449926 XL |
2182 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2183 | where | |
2184 | E: Error, | |
2185 | { | |
2186 | match value { | |
2187 | b"start" => Ok(Field::Start), | |
2188 | b"end" => Ok(Field::End), | |
2189 | _ => { | |
2190 | let value = ::export::from_utf8_lossy(value); | |
2191 | Err(Error::unknown_field(&value, FIELDS)) | |
041b39d2 XL |
2192 | } |
2193 | } | |
2194 | } | |
041b39d2 | 2195 | } |
b7449926 XL |
2196 | |
2197 | deserializer.deserialize_identifier(FieldVisitor) | |
041b39d2 | 2198 | } |
b7449926 | 2199 | } |
041b39d2 | 2200 | |
b7449926 XL |
2201 | pub struct RangeVisitor<Idx> { |
2202 | pub expecting: &'static str, | |
2203 | pub phantom: PhantomData<Idx>, | |
2204 | } | |
2205 | ||
2206 | impl<'de, Idx> Visitor<'de> for RangeVisitor<Idx> | |
2207 | where | |
2208 | Idx: Deserialize<'de>, | |
2209 | { | |
2210 | type Value = (Idx, Idx); | |
2211 | ||
2212 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2213 | formatter.write_str(self.expecting) | |
041b39d2 XL |
2214 | } |
2215 | ||
b7449926 | 2216 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 | 2217 | where |
b7449926 | 2218 | A: SeqAccess<'de>, |
041b39d2 | 2219 | { |
b7449926 XL |
2220 | let start: Idx = match try!(seq.next_element()) { |
2221 | Some(value) => value, | |
2222 | None => { | |
2223 | return Err(Error::invalid_length(0, &self)); | |
2224 | } | |
2225 | }; | |
2226 | let end: Idx = match try!(seq.next_element()) { | |
2227 | Some(value) => value, | |
2228 | None => { | |
2229 | return Err(Error::invalid_length(1, &self)); | |
2230 | } | |
2231 | }; | |
2232 | Ok((start, end)) | |
2233 | } | |
041b39d2 | 2234 | |
b7449926 XL |
2235 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2236 | where | |
2237 | A: MapAccess<'de>, | |
2238 | { | |
2239 | let mut start: Option<Idx> = None; | |
2240 | let mut end: Option<Idx> = None; | |
2241 | while let Some(key) = try!(map.next_key()) { | |
2242 | match key { | |
2243 | Field::Start => { | |
2244 | if start.is_some() { | |
2245 | return Err(<A::Error as Error>::duplicate_field("start")); | |
041b39d2 | 2246 | } |
b7449926 XL |
2247 | start = Some(try!(map.next_value())); |
2248 | } | |
2249 | Field::End => { | |
2250 | if end.is_some() { | |
2251 | return Err(<A::Error as Error>::duplicate_field("end")); | |
041b39d2 | 2252 | } |
b7449926 | 2253 | end = Some(try!(map.next_value())); |
041b39d2 XL |
2254 | } |
2255 | } | |
041b39d2 | 2256 | } |
b7449926 XL |
2257 | let start = match start { |
2258 | Some(start) => start, | |
2259 | None => return Err(<A::Error as Error>::missing_field("start")), | |
2260 | }; | |
2261 | let end = match end { | |
2262 | Some(end) => end, | |
2263 | None => return Err(<A::Error as Error>::missing_field("end")), | |
2264 | }; | |
2265 | Ok((start, end)) | |
041b39d2 | 2266 | } |
041b39d2 XL |
2267 | } |
2268 | } | |
2269 | ||
2270 | //////////////////////////////////////////////////////////////////////////////// | |
2271 | ||
0531ce1d | 2272 | macro_rules! nonzero_integers { |
8faf50e0 | 2273 | ( $( $T: ident, )+ ) => { |
0531ce1d | 2274 | $( |
8faf50e0 XL |
2275 | #[cfg(num_nonzero)] |
2276 | impl<'de> Deserialize<'de> for num::$T { | |
2277 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
0531ce1d XL |
2278 | where |
2279 | D: Deserializer<'de>, | |
2280 | { | |
2281 | let value = try!(Deserialize::deserialize(deserializer)); | |
8faf50e0 | 2282 | match <num::$T>::new(value) { |
0531ce1d XL |
2283 | Some(nonzero) => Ok(nonzero), |
2284 | None => Err(Error::custom("expected a non-zero value")), | |
2285 | } | |
2286 | } | |
2287 | } | |
2288 | )+ | |
2289 | }; | |
2290 | } | |
2291 | ||
2292 | nonzero_integers! { | |
2293 | // Not including signed NonZeroI* since they might be removed | |
2294 | NonZeroU8, | |
2295 | NonZeroU16, | |
2296 | NonZeroU32, | |
2297 | NonZeroU64, | |
0531ce1d XL |
2298 | NonZeroUsize, |
2299 | } | |
2300 | ||
0731742a XL |
2301 | // Currently 128-bit integers do not work on Emscripten targets so we need an |
2302 | // additional `#[cfg]` | |
2303 | serde_if_integer128! { | |
2304 | nonzero_integers! { | |
2305 | NonZeroU128, | |
2306 | } | |
2307 | } | |
2308 | ||
041b39d2 XL |
2309 | //////////////////////////////////////////////////////////////////////////////// |
2310 | ||
2311 | impl<'de, T, E> Deserialize<'de> for Result<T, E> | |
2312 | where | |
2313 | T: Deserialize<'de>, | |
2314 | E: Deserialize<'de>, | |
2315 | { | |
8faf50e0 | 2316 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
2317 | where |
2318 | D: Deserializer<'de>, | |
2319 | { | |
2320 | // If this were outside of the serde crate, it would just use: | |
2321 | // | |
2322 | // #[derive(Deserialize)] | |
2323 | // #[serde(variant_identifier)] | |
2324 | enum Field { | |
2325 | Ok, | |
2326 | Err, | |
2327 | } | |
2328 | ||
2329 | impl<'de> Deserialize<'de> for Field { | |
2330 | #[inline] | |
8faf50e0 | 2331 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
2332 | where |
2333 | D: Deserializer<'de>, | |
2334 | { | |
2335 | struct FieldVisitor; | |
2336 | ||
2337 | impl<'de> Visitor<'de> for FieldVisitor { | |
2338 | type Value = Field; | |
2339 | ||
2340 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2341 | formatter.write_str("`Ok` or `Err`") | |
2342 | } | |
2343 | ||
8faf50e0 | 2344 | fn visit_u32<E>(self, value: u32) -> Result<Self::Value, E> |
041b39d2 XL |
2345 | where |
2346 | E: Error, | |
2347 | { | |
2348 | match value { | |
2349 | 0 => Ok(Field::Ok), | |
2350 | 1 => Ok(Field::Err), | |
ff7c6d11 XL |
2351 | _ => Err(Error::invalid_value( |
2352 | Unexpected::Unsigned(value as u64), | |
2353 | &self, | |
2354 | )), | |
041b39d2 XL |
2355 | } |
2356 | } | |
2357 | ||
8faf50e0 | 2358 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
2359 | where |
2360 | E: Error, | |
2361 | { | |
2362 | match value { | |
2363 | "Ok" => Ok(Field::Ok), | |
2364 | "Err" => Ok(Field::Err), | |
2365 | _ => Err(Error::unknown_variant(value, VARIANTS)), | |
2366 | } | |
2367 | } | |
2368 | ||
8faf50e0 | 2369 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
2370 | where |
2371 | E: Error, | |
2372 | { | |
2373 | match value { | |
2374 | b"Ok" => Ok(Field::Ok), | |
2375 | b"Err" => Ok(Field::Err), | |
ff7c6d11 XL |
2376 | _ => match str::from_utf8(value) { |
2377 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), | |
2378 | Err(_) => { | |
2379 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) | |
041b39d2 | 2380 | } |
ff7c6d11 | 2381 | }, |
041b39d2 XL |
2382 | } |
2383 | } | |
2384 | } | |
2385 | ||
2386 | deserializer.deserialize_identifier(FieldVisitor) | |
2387 | } | |
2388 | } | |
2389 | ||
2390 | struct ResultVisitor<T, E>(PhantomData<Result<T, E>>); | |
2391 | ||
2392 | impl<'de, T, E> Visitor<'de> for ResultVisitor<T, E> | |
2393 | where | |
2394 | T: Deserialize<'de>, | |
2395 | E: Deserialize<'de>, | |
2396 | { | |
2397 | type Value = Result<T, E>; | |
2398 | ||
2399 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2400 | formatter.write_str("enum Result") | |
2401 | } | |
2402 | ||
8faf50e0 | 2403 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2404 | where |
2405 | A: EnumAccess<'de>, | |
2406 | { | |
2407 | match try!(data.variant()) { | |
2408 | (Field::Ok, v) => v.newtype_variant().map(Ok), | |
2409 | (Field::Err, v) => v.newtype_variant().map(Err), | |
2410 | } | |
2411 | } | |
2412 | } | |
2413 | ||
2414 | const VARIANTS: &'static [&'static str] = &["Ok", "Err"]; | |
2415 | ||
2416 | deserializer.deserialize_enum("Result", VARIANTS, ResultVisitor(PhantomData)) | |
2417 | } | |
2418 | } | |
abe05a73 XL |
2419 | |
2420 | //////////////////////////////////////////////////////////////////////////////// | |
2421 | ||
2422 | #[cfg(feature = "std")] | |
2423 | impl<'de, T> Deserialize<'de> for Wrapping<T> | |
2424 | where | |
ff7c6d11 | 2425 | T: Deserialize<'de>, |
abe05a73 | 2426 | { |
8faf50e0 | 2427 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
abe05a73 XL |
2428 | where |
2429 | D: Deserializer<'de>, | |
2430 | { | |
2431 | Deserialize::deserialize(deserializer).map(Wrapping) | |
2432 | } | |
2433 | } |