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1 | // Copyright 2017 Serde Developers |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
4 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
5 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
6 | // option. This file may not be copied, modified, or distributed | |
7 | // except according to those terms. | |
8 | ||
9 | use lib::*; | |
10 | ||
11 | use de::{Deserialize, Deserializer, EnumAccess, Error, SeqAccess, Unexpected, VariantAccess, | |
12 | Visitor}; | |
13 | ||
14 | #[cfg(any(feature = "std", feature = "alloc"))] | |
15 | use de::MapAccess; | |
16 | ||
17 | use de::from_primitive::FromPrimitive; | |
ff7c6d11 | 18 | use private::de::InPlaceSeed; |
041b39d2 XL |
19 | |
20 | #[cfg(any(feature = "std", feature = "alloc"))] | |
21 | use private::de::size_hint; | |
22 | ||
23 | //////////////////////////////////////////////////////////////////////////////// | |
24 | ||
25 | struct UnitVisitor; | |
26 | ||
27 | impl<'de> Visitor<'de> for UnitVisitor { | |
28 | type Value = (); | |
29 | ||
30 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
31 | formatter.write_str("unit") | |
32 | } | |
33 | ||
34 | fn visit_unit<E>(self) -> Result<(), E> | |
35 | where | |
36 | E: Error, | |
37 | { | |
38 | Ok(()) | |
39 | } | |
40 | } | |
41 | ||
42 | impl<'de> Deserialize<'de> for () { | |
43 | fn deserialize<D>(deserializer: D) -> Result<(), D::Error> | |
44 | where | |
45 | D: Deserializer<'de>, | |
46 | { | |
47 | deserializer.deserialize_unit(UnitVisitor) | |
48 | } | |
49 | } | |
50 | ||
51 | //////////////////////////////////////////////////////////////////////////////// | |
52 | ||
53 | struct BoolVisitor; | |
54 | ||
55 | impl<'de> Visitor<'de> for BoolVisitor { | |
56 | type Value = bool; | |
57 | ||
58 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
59 | formatter.write_str("a boolean") | |
60 | } | |
61 | ||
62 | fn visit_bool<E>(self, v: bool) -> Result<bool, E> | |
63 | where | |
64 | E: Error, | |
65 | { | |
66 | Ok(v) | |
67 | } | |
68 | } | |
69 | ||
70 | impl<'de> Deserialize<'de> for bool { | |
71 | fn deserialize<D>(deserializer: D) -> Result<bool, D::Error> | |
72 | where | |
73 | D: Deserializer<'de>, | |
74 | { | |
75 | deserializer.deserialize_bool(BoolVisitor) | |
76 | } | |
77 | } | |
78 | ||
79 | //////////////////////////////////////////////////////////////////////////////// | |
80 | ||
81 | macro_rules! visit_integer_method { | |
82 | ($src_ty:ident, $method:ident, $from_method:ident, $group:ident, $group_ty:ident) => { | |
83 | #[inline] | |
84 | fn $method<E>(self, v: $src_ty) -> Result<Self::Value, E> | |
85 | where | |
86 | E: Error, | |
87 | { | |
88 | match FromPrimitive::$from_method(v) { | |
89 | Some(v) => Ok(v), | |
90 | None => Err(Error::invalid_value(Unexpected::$group(v as $group_ty), &self)), | |
91 | } | |
92 | } | |
93 | } | |
94 | } | |
95 | ||
96 | macro_rules! visit_float_method { | |
97 | ($src_ty:ident, $method:ident) => { | |
98 | #[inline] | |
99 | fn $method<E>(self, v: $src_ty) -> Result<Self::Value, E> | |
100 | where | |
101 | E: Error, | |
102 | { | |
103 | Ok(v as Self::Value) | |
104 | } | |
105 | } | |
106 | } | |
107 | ||
108 | macro_rules! impl_deserialize_num { | |
109 | ($ty:ident, $method:ident, $($visit:ident),*) => { | |
110 | impl<'de> Deserialize<'de> for $ty { | |
111 | #[inline] | |
112 | fn deserialize<D>(deserializer: D) -> Result<$ty, D::Error> | |
113 | where | |
114 | D: Deserializer<'de>, | |
115 | { | |
116 | struct PrimitiveVisitor; | |
117 | ||
118 | impl<'de> Visitor<'de> for PrimitiveVisitor { | |
119 | type Value = $ty; | |
120 | ||
121 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
122 | formatter.write_str(stringify!($ty)) | |
123 | } | |
124 | ||
125 | $( | |
126 | impl_deserialize_num!($visit $ty); | |
127 | )* | |
128 | } | |
129 | ||
130 | deserializer.$method(PrimitiveVisitor) | |
131 | } | |
132 | } | |
133 | }; | |
134 | ||
135 | (integer $ty:ident) => { | |
136 | visit_integer_method!(i8, visit_i8, from_i8, Signed, i64); | |
137 | visit_integer_method!(i16, visit_i16, from_i16, Signed, i64); | |
138 | visit_integer_method!(i32, visit_i32, from_i32, Signed, i64); | |
139 | visit_integer_method!(i64, visit_i64, from_i64, Signed, i64); | |
140 | ||
141 | visit_integer_method!(u8, visit_u8, from_u8, Unsigned, u64); | |
142 | visit_integer_method!(u16, visit_u16, from_u16, Unsigned, u64); | |
143 | visit_integer_method!(u32, visit_u32, from_u32, Unsigned, u64); | |
144 | visit_integer_method!(u64, visit_u64, from_u64, Unsigned, u64); | |
145 | }; | |
146 | ||
147 | (float $ty:ident) => { | |
148 | visit_float_method!(f32, visit_f32); | |
149 | visit_float_method!(f64, visit_f64); | |
150 | }; | |
151 | } | |
152 | ||
153 | impl_deserialize_num!(i8, deserialize_i8, integer); | |
154 | impl_deserialize_num!(i16, deserialize_i16, integer); | |
155 | impl_deserialize_num!(i32, deserialize_i32, integer); | |
156 | impl_deserialize_num!(i64, deserialize_i64, integer); | |
157 | impl_deserialize_num!(isize, deserialize_i64, integer); | |
158 | ||
159 | impl_deserialize_num!(u8, deserialize_u8, integer); | |
160 | impl_deserialize_num!(u16, deserialize_u16, integer); | |
161 | impl_deserialize_num!(u32, deserialize_u32, integer); | |
162 | impl_deserialize_num!(u64, deserialize_u64, integer); | |
163 | impl_deserialize_num!(usize, deserialize_u64, integer); | |
164 | ||
165 | impl_deserialize_num!(f32, deserialize_f32, integer, float); | |
166 | impl_deserialize_num!(f64, deserialize_f64, integer, float); | |
167 | ||
168 | //////////////////////////////////////////////////////////////////////////////// | |
169 | ||
170 | struct CharVisitor; | |
171 | ||
172 | impl<'de> Visitor<'de> for CharVisitor { | |
173 | type Value = char; | |
174 | ||
175 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
176 | formatter.write_str("a character") | |
177 | } | |
178 | ||
179 | #[inline] | |
180 | fn visit_char<E>(self, v: char) -> Result<char, E> | |
181 | where | |
182 | E: Error, | |
183 | { | |
184 | Ok(v) | |
185 | } | |
186 | ||
187 | #[inline] | |
188 | fn visit_str<E>(self, v: &str) -> Result<char, E> | |
189 | where | |
190 | E: Error, | |
191 | { | |
192 | let mut iter = v.chars(); | |
193 | match (iter.next(), iter.next()) { | |
194 | (Some(c), None) => Ok(c), | |
195 | _ => Err(Error::invalid_value(Unexpected::Str(v), &self)), | |
196 | } | |
197 | } | |
198 | } | |
199 | ||
200 | impl<'de> Deserialize<'de> for char { | |
201 | #[inline] | |
202 | fn deserialize<D>(deserializer: D) -> Result<char, D::Error> | |
203 | where | |
204 | D: Deserializer<'de>, | |
205 | { | |
206 | deserializer.deserialize_char(CharVisitor) | |
207 | } | |
208 | } | |
209 | ||
210 | //////////////////////////////////////////////////////////////////////////////// | |
211 | ||
212 | #[cfg(any(feature = "std", feature = "alloc"))] | |
213 | struct StringVisitor; | |
ff7c6d11 XL |
214 | #[cfg(any(feature = "std", feature = "alloc"))] |
215 | struct StringInPlaceVisitor<'a>(&'a mut String); | |
041b39d2 XL |
216 | |
217 | #[cfg(any(feature = "std", feature = "alloc"))] | |
218 | impl<'de> Visitor<'de> for StringVisitor { | |
219 | type Value = String; | |
220 | ||
221 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
222 | formatter.write_str("a string") | |
223 | } | |
224 | ||
225 | fn visit_str<E>(self, v: &str) -> Result<String, E> | |
226 | where | |
227 | E: Error, | |
228 | { | |
229 | Ok(v.to_owned()) | |
230 | } | |
231 | ||
232 | fn visit_string<E>(self, v: String) -> Result<String, E> | |
233 | where | |
234 | E: Error, | |
235 | { | |
236 | Ok(v) | |
237 | } | |
238 | ||
239 | fn visit_bytes<E>(self, v: &[u8]) -> Result<String, E> | |
240 | where | |
241 | E: Error, | |
242 | { | |
243 | match str::from_utf8(v) { | |
244 | Ok(s) => Ok(s.to_owned()), | |
245 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
246 | } | |
247 | } | |
248 | ||
249 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<String, E> | |
250 | where | |
251 | E: Error, | |
252 | { | |
253 | match String::from_utf8(v) { | |
254 | Ok(s) => Ok(s), | |
ff7c6d11 XL |
255 | Err(e) => Err(Error::invalid_value( |
256 | Unexpected::Bytes(&e.into_bytes()), | |
257 | &self, | |
258 | )), | |
259 | } | |
260 | } | |
261 | } | |
262 | ||
263 | #[cfg(any(feature = "std", feature = "alloc"))] | |
264 | impl<'a, 'de> Visitor<'de> for StringInPlaceVisitor<'a> { | |
265 | type Value = (); | |
266 | ||
267 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
268 | formatter.write_str("a string") | |
269 | } | |
270 | ||
271 | fn visit_str<E>(self, v: &str) -> Result<(), E> | |
272 | where | |
273 | E: Error, | |
274 | { | |
275 | self.0.clear(); | |
276 | self.0.push_str(v); | |
277 | Ok(()) | |
278 | } | |
279 | ||
280 | fn visit_string<E>(self, v: String) -> Result<(), E> | |
281 | where | |
282 | E: Error, | |
283 | { | |
284 | *self.0 = v; | |
285 | Ok(()) | |
286 | } | |
287 | ||
288 | fn visit_bytes<E>(self, v: &[u8]) -> Result<(), E> | |
289 | where | |
290 | E: Error, | |
291 | { | |
292 | match str::from_utf8(v) { | |
293 | Ok(s) => { | |
294 | self.0.clear(); | |
295 | self.0.push_str(s); | |
296 | Ok(()) | |
297 | } | |
298 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
299 | } | |
300 | } | |
301 | ||
302 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<(), E> | |
303 | where | |
304 | E: Error, | |
305 | { | |
306 | match String::from_utf8(v) { | |
307 | Ok(s) => { | |
308 | *self.0 = s; | |
309 | Ok(()) | |
310 | } | |
311 | Err(e) => Err(Error::invalid_value( | |
312 | Unexpected::Bytes(&e.into_bytes()), | |
313 | &self, | |
314 | )), | |
041b39d2 XL |
315 | } |
316 | } | |
317 | } | |
318 | ||
319 | #[cfg(any(feature = "std", feature = "alloc"))] | |
320 | impl<'de> Deserialize<'de> for String { | |
321 | fn deserialize<D>(deserializer: D) -> Result<String, D::Error> | |
322 | where | |
323 | D: Deserializer<'de>, | |
324 | { | |
325 | deserializer.deserialize_string(StringVisitor) | |
326 | } | |
ff7c6d11 XL |
327 | |
328 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
329 | where | |
330 | D: Deserializer<'de>, | |
331 | { | |
332 | deserializer.deserialize_string(StringInPlaceVisitor(place)) | |
333 | } | |
041b39d2 XL |
334 | } |
335 | ||
336 | //////////////////////////////////////////////////////////////////////////////// | |
337 | ||
338 | struct StrVisitor; | |
339 | ||
340 | impl<'a> Visitor<'a> for StrVisitor { | |
341 | type Value = &'a str; | |
342 | ||
343 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
344 | formatter.write_str("a borrowed string") | |
345 | } | |
346 | ||
347 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
348 | where | |
349 | E: Error, | |
350 | { | |
351 | Ok(v) // so easy | |
352 | } | |
353 | ||
354 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
355 | where | |
356 | E: Error, | |
357 | { | |
358 | str::from_utf8(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
359 | } | |
360 | } | |
361 | ||
362 | impl<'de: 'a, 'a> Deserialize<'de> for &'a str { | |
363 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
364 | where | |
365 | D: Deserializer<'de>, | |
366 | { | |
367 | deserializer.deserialize_str(StrVisitor) | |
368 | } | |
369 | } | |
370 | ||
371 | //////////////////////////////////////////////////////////////////////////////// | |
372 | ||
373 | struct BytesVisitor; | |
374 | ||
375 | impl<'a> Visitor<'a> for BytesVisitor { | |
376 | type Value = &'a [u8]; | |
377 | ||
378 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
379 | formatter.write_str("a borrowed byte array") | |
380 | } | |
381 | ||
382 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
383 | where | |
384 | E: Error, | |
385 | { | |
386 | Ok(v) | |
387 | } | |
388 | ||
389 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
390 | where | |
391 | E: Error, | |
392 | { | |
393 | Ok(v.as_bytes()) | |
394 | } | |
395 | } | |
396 | ||
397 | impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] { | |
398 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
399 | where | |
400 | D: Deserializer<'de>, | |
401 | { | |
402 | deserializer.deserialize_bytes(BytesVisitor) | |
403 | } | |
404 | } | |
405 | ||
406 | //////////////////////////////////////////////////////////////////////////////// | |
407 | ||
408 | #[cfg(feature = "std")] | |
409 | struct CStringVisitor; | |
410 | ||
411 | #[cfg(feature = "std")] | |
412 | impl<'de> Visitor<'de> for CStringVisitor { | |
413 | type Value = CString; | |
414 | ||
415 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
416 | formatter.write_str("byte array") | |
417 | } | |
418 | ||
419 | fn visit_seq<A>(self, mut seq: A) -> Result<CString, A::Error> | |
420 | where | |
421 | A: SeqAccess<'de>, | |
422 | { | |
423 | let len = size_hint::cautious(seq.size_hint()); | |
424 | let mut values = Vec::with_capacity(len); | |
425 | ||
426 | while let Some(value) = try!(seq.next_element()) { | |
427 | values.push(value); | |
428 | } | |
429 | ||
430 | CString::new(values).map_err(Error::custom) | |
431 | } | |
432 | ||
433 | fn visit_bytes<E>(self, v: &[u8]) -> Result<CString, E> | |
434 | where | |
435 | E: Error, | |
436 | { | |
437 | CString::new(v).map_err(Error::custom) | |
438 | } | |
439 | ||
440 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<CString, E> | |
441 | where | |
442 | E: Error, | |
443 | { | |
444 | CString::new(v).map_err(Error::custom) | |
445 | } | |
446 | ||
447 | fn visit_str<E>(self, v: &str) -> Result<CString, E> | |
448 | where | |
449 | E: Error, | |
450 | { | |
451 | CString::new(v).map_err(Error::custom) | |
452 | } | |
453 | ||
454 | fn visit_string<E>(self, v: String) -> Result<CString, E> | |
455 | where | |
456 | E: Error, | |
457 | { | |
458 | CString::new(v).map_err(Error::custom) | |
459 | } | |
460 | } | |
461 | ||
462 | #[cfg(feature = "std")] | |
463 | impl<'de> Deserialize<'de> for CString { | |
464 | fn deserialize<D>(deserializer: D) -> Result<CString, D::Error> | |
465 | where | |
466 | D: Deserializer<'de>, | |
467 | { | |
468 | deserializer.deserialize_byte_buf(CStringVisitor) | |
469 | } | |
470 | } | |
471 | ||
3b2f2976 XL |
472 | macro_rules! forwarded_impl { |
473 | (( $($id: ident),* ), $ty: ty, $func: expr) => { | |
474 | impl<'de $(, $id : Deserialize<'de>,)*> Deserialize<'de> for $ty { | |
475 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
476 | where | |
477 | D: Deserializer<'de>, | |
478 | { | |
479 | Deserialize::deserialize(deserializer).map($func) | |
480 | } | |
481 | } | |
041b39d2 XL |
482 | } |
483 | } | |
484 | ||
3b2f2976 XL |
485 | #[cfg(all(feature = "std", feature = "unstable"))] |
486 | forwarded_impl!((), Box<CStr>, CString::into_boxed_c_str); | |
487 | ||
041b39d2 XL |
488 | //////////////////////////////////////////////////////////////////////////////// |
489 | ||
490 | struct OptionVisitor<T> { | |
491 | marker: PhantomData<T>, | |
492 | } | |
493 | ||
494 | impl<'de, T> Visitor<'de> for OptionVisitor<T> | |
495 | where | |
496 | T: Deserialize<'de>, | |
497 | { | |
498 | type Value = Option<T>; | |
499 | ||
500 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
501 | formatter.write_str("option") | |
502 | } | |
503 | ||
504 | #[inline] | |
505 | fn visit_unit<E>(self) -> Result<Option<T>, E> | |
506 | where | |
507 | E: Error, | |
508 | { | |
509 | Ok(None) | |
510 | } | |
511 | ||
512 | #[inline] | |
513 | fn visit_none<E>(self) -> Result<Option<T>, E> | |
514 | where | |
515 | E: Error, | |
516 | { | |
517 | Ok(None) | |
518 | } | |
519 | ||
520 | #[inline] | |
521 | fn visit_some<D>(self, deserializer: D) -> Result<Option<T>, D::Error> | |
522 | where | |
523 | D: Deserializer<'de>, | |
524 | { | |
525 | T::deserialize(deserializer).map(Some) | |
526 | } | |
527 | } | |
528 | ||
529 | impl<'de, T> Deserialize<'de> for Option<T> | |
530 | where | |
531 | T: Deserialize<'de>, | |
532 | { | |
533 | fn deserialize<D>(deserializer: D) -> Result<Option<T>, D::Error> | |
534 | where | |
535 | D: Deserializer<'de>, | |
536 | { | |
ff7c6d11 XL |
537 | deserializer.deserialize_option(OptionVisitor { |
538 | marker: PhantomData, | |
539 | }) | |
041b39d2 | 540 | } |
ff7c6d11 XL |
541 | |
542 | // The Some variant's repr is opaque, so we can't play cute tricks with its | |
543 | // tag to have deserialize_in_place build the content in place unconditionally. | |
544 | // | |
545 | // FIXME: investigate whether branching on the old value being Some to | |
546 | // deserialize_in_place the value is profitable (probably data-dependent?) | |
041b39d2 XL |
547 | } |
548 | ||
549 | //////////////////////////////////////////////////////////////////////////////// | |
550 | ||
2c00a5a8 | 551 | struct PhantomDataVisitor<T: ?Sized> { |
041b39d2 XL |
552 | marker: PhantomData<T>, |
553 | } | |
554 | ||
2c00a5a8 | 555 | impl<'de, T: ?Sized> Visitor<'de> for PhantomDataVisitor<T> { |
041b39d2 XL |
556 | type Value = PhantomData<T>; |
557 | ||
558 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
559 | formatter.write_str("unit") | |
560 | } | |
561 | ||
562 | #[inline] | |
563 | fn visit_unit<E>(self) -> Result<PhantomData<T>, E> | |
564 | where | |
565 | E: Error, | |
566 | { | |
567 | Ok(PhantomData) | |
568 | } | |
569 | } | |
570 | ||
2c00a5a8 | 571 | impl<'de, T: ?Sized> Deserialize<'de> for PhantomData<T> { |
041b39d2 XL |
572 | fn deserialize<D>(deserializer: D) -> Result<PhantomData<T>, D::Error> |
573 | where | |
574 | D: Deserializer<'de>, | |
575 | { | |
ff7c6d11 XL |
576 | let visitor = PhantomDataVisitor { |
577 | marker: PhantomData, | |
578 | }; | |
041b39d2 XL |
579 | deserializer.deserialize_unit_struct("PhantomData", visitor) |
580 | } | |
581 | } | |
582 | ||
583 | //////////////////////////////////////////////////////////////////////////////// | |
584 | ||
585 | #[cfg(any(feature = "std", feature = "alloc"))] | |
586 | macro_rules! seq_impl { | |
587 | ( | |
588 | $ty:ident < T $(: $tbound1:ident $(+ $tbound2:ident)*)* $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
589 | $access:ident, | |
590 | $ctor:expr, | |
ff7c6d11 | 591 | $clear:expr, |
041b39d2 | 592 | $with_capacity:expr, |
ff7c6d11 | 593 | $reserve:expr, |
041b39d2 XL |
594 | $insert:expr |
595 | ) => { | |
596 | impl<'de, T $(, $typaram)*> Deserialize<'de> for $ty<T $(, $typaram)*> | |
597 | where | |
598 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
599 | $($typaram: $bound1 $(+ $bound2)*,)* | |
600 | { | |
601 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
602 | where | |
603 | D: Deserializer<'de>, | |
604 | { | |
605 | struct SeqVisitor<T $(, $typaram)*> { | |
606 | marker: PhantomData<$ty<T $(, $typaram)*>>, | |
607 | } | |
608 | ||
609 | impl<'de, T $(, $typaram)*> Visitor<'de> for SeqVisitor<T $(, $typaram)*> | |
610 | where | |
611 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
612 | $($typaram: $bound1 $(+ $bound2)*,)* | |
613 | { | |
614 | type Value = $ty<T $(, $typaram)*>; | |
615 | ||
616 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
617 | formatter.write_str("a sequence") | |
618 | } | |
619 | ||
620 | #[inline] | |
621 | fn visit_seq<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
622 | where | |
623 | A: SeqAccess<'de>, | |
624 | { | |
625 | let mut values = $with_capacity; | |
626 | ||
627 | while let Some(value) = try!($access.next_element()) { | |
628 | $insert(&mut values, value); | |
629 | } | |
630 | ||
631 | Ok(values) | |
632 | } | |
633 | } | |
634 | ||
635 | let visitor = SeqVisitor { marker: PhantomData }; | |
636 | deserializer.deserialize_seq(visitor) | |
637 | } | |
ff7c6d11 XL |
638 | |
639 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
640 | where | |
641 | D: Deserializer<'de>, | |
642 | { | |
643 | struct SeqInPlaceVisitor<'a, T: 'a $(, $typaram: 'a)*>(&'a mut $ty<T $(, $typaram)*>); | |
644 | ||
645 | impl<'a, 'de, T $(, $typaram)*> Visitor<'de> for SeqInPlaceVisitor<'a, T $(, $typaram)*> | |
646 | where | |
647 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
648 | $($typaram: $bound1 $(+ $bound2)*,)* | |
649 | { | |
650 | type Value = (); | |
651 | ||
652 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
653 | formatter.write_str("a sequence") | |
654 | } | |
655 | ||
656 | #[inline] | |
657 | fn visit_seq<A>(mut self, mut $access: A) -> Result<(), A::Error> | |
658 | where | |
659 | A: SeqAccess<'de>, | |
660 | { | |
661 | $clear(&mut self.0); | |
662 | $reserve(&mut self.0, size_hint::cautious($access.size_hint())); | |
663 | ||
664 | // FIXME: try to overwrite old values here? (Vec, VecDeque, LinkedList) | |
665 | while let Some(value) = try!($access.next_element()) { | |
666 | $insert(&mut self.0, value); | |
667 | } | |
668 | ||
669 | Ok(()) | |
670 | } | |
671 | } | |
672 | ||
673 | deserializer.deserialize_seq(SeqInPlaceVisitor(place)) | |
674 | } | |
041b39d2 XL |
675 | } |
676 | } | |
677 | } | |
678 | ||
ff7c6d11 XL |
679 | // Dummy impl of reserve |
680 | #[cfg(any(feature = "std", feature = "alloc"))] | |
681 | fn nop_reserve<T>(_seq: T, _n: usize) {} | |
682 | ||
041b39d2 XL |
683 | #[cfg(any(feature = "std", feature = "alloc"))] |
684 | seq_impl!( | |
685 | BinaryHeap<T: Ord>, | |
686 | seq, | |
687 | BinaryHeap::new(), | |
ff7c6d11 | 688 | BinaryHeap::clear, |
041b39d2 | 689 | BinaryHeap::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 | 690 | BinaryHeap::reserve, |
041b39d2 XL |
691 | BinaryHeap::push); |
692 | ||
693 | #[cfg(any(feature = "std", feature = "alloc"))] | |
694 | seq_impl!( | |
695 | BTreeSet<T: Eq + Ord>, | |
696 | seq, | |
697 | BTreeSet::new(), | |
ff7c6d11 | 698 | BTreeSet::clear, |
041b39d2 | 699 | BTreeSet::new(), |
ff7c6d11 | 700 | nop_reserve, |
041b39d2 XL |
701 | BTreeSet::insert); |
702 | ||
703 | #[cfg(any(feature = "std", feature = "alloc"))] | |
704 | seq_impl!( | |
705 | LinkedList<T>, | |
706 | seq, | |
707 | LinkedList::new(), | |
ff7c6d11 | 708 | LinkedList::clear, |
041b39d2 | 709 | LinkedList::new(), |
ff7c6d11 XL |
710 | nop_reserve, |
711 | LinkedList::push_back | |
712 | ); | |
041b39d2 XL |
713 | |
714 | #[cfg(feature = "std")] | |
715 | seq_impl!( | |
716 | HashSet<T: Eq + Hash, S: BuildHasher + Default>, | |
717 | seq, | |
718 | HashSet::with_hasher(S::default()), | |
ff7c6d11 | 719 | HashSet::clear, |
041b39d2 | 720 | HashSet::with_capacity_and_hasher(size_hint::cautious(seq.size_hint()), S::default()), |
ff7c6d11 | 721 | HashSet::reserve, |
041b39d2 XL |
722 | HashSet::insert); |
723 | ||
724 | #[cfg(any(feature = "std", feature = "alloc"))] | |
725 | seq_impl!( | |
726 | Vec<T>, | |
727 | seq, | |
728 | Vec::new(), | |
ff7c6d11 | 729 | Vec::clear, |
041b39d2 | 730 | Vec::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 XL |
731 | Vec::reserve, |
732 | Vec::push | |
733 | ); | |
041b39d2 XL |
734 | |
735 | #[cfg(any(feature = "std", feature = "alloc"))] | |
736 | seq_impl!( | |
737 | VecDeque<T>, | |
738 | seq, | |
739 | VecDeque::new(), | |
ff7c6d11 | 740 | VecDeque::clear, |
041b39d2 | 741 | VecDeque::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 XL |
742 | VecDeque::reserve, |
743 | VecDeque::push_back | |
744 | ); | |
041b39d2 XL |
745 | |
746 | //////////////////////////////////////////////////////////////////////////////// | |
747 | ||
748 | struct ArrayVisitor<A> { | |
749 | marker: PhantomData<A>, | |
750 | } | |
ff7c6d11 | 751 | struct ArrayInPlaceVisitor<'a, A: 'a>(&'a mut A); |
041b39d2 XL |
752 | |
753 | impl<A> ArrayVisitor<A> { | |
754 | fn new() -> Self { | |
ff7c6d11 XL |
755 | ArrayVisitor { |
756 | marker: PhantomData, | |
757 | } | |
041b39d2 XL |
758 | } |
759 | } | |
760 | ||
761 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; 0]> { | |
762 | type Value = [T; 0]; | |
763 | ||
764 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
765 | formatter.write_str("an empty array") | |
766 | } | |
767 | ||
768 | #[inline] | |
769 | fn visit_seq<A>(self, _: A) -> Result<[T; 0], A::Error> | |
770 | where | |
771 | A: SeqAccess<'de>, | |
772 | { | |
773 | Ok([]) | |
774 | } | |
775 | } | |
776 | ||
777 | // Does not require T: Deserialize<'de>. | |
778 | impl<'de, T> Deserialize<'de> for [T; 0] { | |
779 | fn deserialize<D>(deserializer: D) -> Result<[T; 0], D::Error> | |
780 | where | |
781 | D: Deserializer<'de>, | |
782 | { | |
783 | deserializer.deserialize_tuple(0, ArrayVisitor::<[T; 0]>::new()) | |
784 | } | |
785 | } | |
786 | ||
787 | macro_rules! array_impls { | |
788 | ($($len:expr => ($($n:tt $name:ident)+))+) => { | |
789 | $( | |
790 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; $len]> | |
791 | where | |
792 | T: Deserialize<'de>, | |
793 | { | |
794 | type Value = [T; $len]; | |
795 | ||
796 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
797 | formatter.write_str(concat!("an array of length ", $len)) | |
798 | } | |
799 | ||
800 | #[inline] | |
801 | fn visit_seq<A>(self, mut seq: A) -> Result<[T; $len], A::Error> | |
802 | where | |
803 | A: SeqAccess<'de>, | |
804 | { | |
805 | $( | |
806 | let $name = match try!(seq.next_element()) { | |
807 | Some(val) => val, | |
808 | None => return Err(Error::invalid_length($n, &self)), | |
809 | }; | |
810 | )+ | |
811 | ||
812 | Ok([$($name),+]) | |
813 | } | |
814 | } | |
815 | ||
ff7c6d11 XL |
816 | impl<'a, 'de, T> Visitor<'de> for ArrayInPlaceVisitor<'a, [T; $len]> |
817 | where | |
818 | T: Deserialize<'de>, | |
819 | { | |
820 | type Value = (); | |
821 | ||
822 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
823 | formatter.write_str(concat!("an array of length ", $len)) | |
824 | } | |
825 | ||
826 | #[inline] | |
827 | fn visit_seq<A>(self, mut seq: A) -> Result<(), A::Error> | |
828 | where | |
829 | A: SeqAccess<'de>, | |
830 | { | |
831 | let mut fail_idx = None; | |
832 | for (idx, dest) in self.0[..].iter_mut().enumerate() { | |
833 | if try!(seq.next_element_seed(InPlaceSeed(dest))).is_none() { | |
834 | fail_idx = Some(idx); | |
835 | break; | |
836 | } | |
837 | } | |
838 | if let Some(idx) = fail_idx { | |
839 | return Err(Error::invalid_length(idx, &self)); | |
840 | } | |
841 | Ok(()) | |
842 | } | |
843 | } | |
844 | ||
041b39d2 XL |
845 | impl<'de, T> Deserialize<'de> for [T; $len] |
846 | where | |
847 | T: Deserialize<'de>, | |
848 | { | |
849 | fn deserialize<D>(deserializer: D) -> Result<[T; $len], D::Error> | |
850 | where | |
851 | D: Deserializer<'de>, | |
852 | { | |
853 | deserializer.deserialize_tuple($len, ArrayVisitor::<[T; $len]>::new()) | |
854 | } | |
ff7c6d11 XL |
855 | |
856 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
857 | where | |
858 | D: Deserializer<'de>, | |
859 | { | |
860 | deserializer.deserialize_tuple($len, ArrayInPlaceVisitor(place)) | |
861 | } | |
041b39d2 XL |
862 | } |
863 | )+ | |
864 | } | |
865 | } | |
866 | ||
867 | array_impls! { | |
868 | 1 => (0 a) | |
869 | 2 => (0 a 1 b) | |
870 | 3 => (0 a 1 b 2 c) | |
871 | 4 => (0 a 1 b 2 c 3 d) | |
872 | 5 => (0 a 1 b 2 c 3 d 4 e) | |
873 | 6 => (0 a 1 b 2 c 3 d 4 e 5 f) | |
874 | 7 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g) | |
875 | 8 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h) | |
876 | 9 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i) | |
877 | 10 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j) | |
878 | 11 => (0 a 1 b 2 c 3 d 4 e 5 f 6 g 7 h 8 i 9 j 10 k) | |
879 | 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) | |
880 | 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) | |
881 | 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) | |
882 | 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) | |
883 | 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) | |
884 | 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) | |
885 | 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) | |
886 | 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) | |
887 | 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) | |
888 | 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) | |
889 | 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) | |
890 | 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) | |
891 | 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) | |
892 | 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) | |
893 | 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) | |
894 | 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) | |
895 | 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) | |
896 | 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) | |
897 | 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) | |
898 | 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) | |
899 | 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) | |
900 | } | |
901 | ||
902 | //////////////////////////////////////////////////////////////////////////////// | |
903 | ||
904 | macro_rules! tuple_impls { | |
ff7c6d11 | 905 | ($($len:tt => ($($n:tt $name:ident)+))+) => { |
041b39d2 | 906 | $( |
ff7c6d11 XL |
907 | impl<'de, $($name: Deserialize<'de>),+> Deserialize<'de> for ($($name,)+) { |
908 | #[inline] | |
909 | fn deserialize<D>(deserializer: D) -> Result<($($name,)+), D::Error> | |
910 | where | |
911 | D: Deserializer<'de>, | |
912 | { | |
913 | struct TupleVisitor<$($name,)+> { | |
914 | marker: PhantomData<($($name,)+)>, | |
915 | } | |
041b39d2 | 916 | |
ff7c6d11 XL |
917 | impl<'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleVisitor<$($name,)+> { |
918 | type Value = ($($name,)+); | |
041b39d2 | 919 | |
ff7c6d11 XL |
920 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
921 | formatter.write_str(concat!("a tuple of size ", $len)) | |
922 | } | |
041b39d2 | 923 | |
ff7c6d11 XL |
924 | #[inline] |
925 | #[allow(non_snake_case)] | |
926 | fn visit_seq<A>(self, mut seq: A) -> Result<($($name,)+), A::Error> | |
927 | where | |
928 | A: SeqAccess<'de>, | |
929 | { | |
930 | $( | |
931 | let $name = match try!(seq.next_element()) { | |
932 | Some(value) => value, | |
933 | None => return Err(Error::invalid_length($n, &self)), | |
934 | }; | |
935 | )+ | |
041b39d2 | 936 | |
ff7c6d11 XL |
937 | Ok(($($name,)+)) |
938 | } | |
939 | } | |
041b39d2 | 940 | |
ff7c6d11 | 941 | deserializer.deserialize_tuple($len, TupleVisitor { marker: PhantomData }) |
041b39d2 | 942 | } |
041b39d2 | 943 | |
041b39d2 | 944 | #[inline] |
ff7c6d11 | 945 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
041b39d2 XL |
946 | where |
947 | D: Deserializer<'de>, | |
948 | { | |
ff7c6d11 XL |
949 | struct TupleInPlaceVisitor<'a, $($name: 'a,)+>(&'a mut ($($name,)+)); |
950 | ||
951 | impl<'a, 'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleInPlaceVisitor<'a, $($name,)+> { | |
952 | type Value = (); | |
953 | ||
954 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
955 | formatter.write_str(concat!("a tuple of size ", $len)) | |
956 | } | |
957 | ||
958 | #[inline] | |
959 | #[allow(non_snake_case)] | |
960 | fn visit_seq<A>(self, mut seq: A) -> Result<(), A::Error> | |
961 | where | |
962 | A: SeqAccess<'de>, | |
963 | { | |
964 | $( | |
965 | if try!(seq.next_element_seed(InPlaceSeed(&mut (self.0).$n))).is_none() { | |
966 | return Err(Error::invalid_length($n, &self)); | |
967 | } | |
968 | )+ | |
969 | ||
970 | Ok(()) | |
971 | } | |
972 | } | |
973 | ||
974 | deserializer.deserialize_tuple($len, TupleInPlaceVisitor(place)) | |
041b39d2 XL |
975 | } |
976 | } | |
977 | )+ | |
978 | } | |
979 | } | |
980 | ||
981 | tuple_impls! { | |
ff7c6d11 XL |
982 | 1 => (0 T0) |
983 | 2 => (0 T0 1 T1) | |
984 | 3 => (0 T0 1 T1 2 T2) | |
985 | 4 => (0 T0 1 T1 2 T2 3 T3) | |
986 | 5 => (0 T0 1 T1 2 T2 3 T3 4 T4) | |
987 | 6 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5) | |
988 | 7 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6) | |
989 | 8 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7) | |
990 | 9 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8) | |
991 | 10 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9) | |
992 | 11 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10) | |
993 | 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) | |
994 | 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) | |
995 | 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) | |
996 | 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) | |
997 | 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 |
998 | } |
999 | ||
1000 | //////////////////////////////////////////////////////////////////////////////// | |
1001 | ||
1002 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1003 | macro_rules! map_impl { | |
1004 | ( | |
1005 | $ty:ident < K $(: $kbound1:ident $(+ $kbound2:ident)*)*, V $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
1006 | $access:ident, | |
1007 | $ctor:expr, | |
1008 | $with_capacity:expr | |
1009 | ) => { | |
1010 | impl<'de, K, V $(, $typaram)*> Deserialize<'de> for $ty<K, V $(, $typaram)*> | |
1011 | where | |
1012 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1013 | V: Deserialize<'de>, | |
1014 | $($typaram: $bound1 $(+ $bound2)*),* | |
1015 | { | |
1016 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1017 | where | |
1018 | D: Deserializer<'de>, | |
1019 | { | |
1020 | struct MapVisitor<K, V $(, $typaram)*> { | |
1021 | marker: PhantomData<$ty<K, V $(, $typaram)*>>, | |
1022 | } | |
1023 | ||
1024 | impl<'de, K, V $(, $typaram)*> Visitor<'de> for MapVisitor<K, V $(, $typaram)*> | |
1025 | where | |
1026 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1027 | V: Deserialize<'de>, | |
1028 | $($typaram: $bound1 $(+ $bound2)*),* | |
1029 | { | |
1030 | type Value = $ty<K, V $(, $typaram)*>; | |
1031 | ||
1032 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1033 | formatter.write_str("a map") | |
1034 | } | |
1035 | ||
1036 | #[inline] | |
1037 | fn visit_map<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
1038 | where | |
1039 | A: MapAccess<'de>, | |
1040 | { | |
1041 | let mut values = $with_capacity; | |
1042 | ||
1043 | while let Some((key, value)) = try!($access.next_entry()) { | |
1044 | values.insert(key, value); | |
1045 | } | |
1046 | ||
1047 | Ok(values) | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | let visitor = MapVisitor { marker: PhantomData }; | |
1052 | deserializer.deserialize_map(visitor) | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1059 | map_impl!( | |
1060 | BTreeMap<K: Ord, V>, | |
1061 | map, | |
1062 | BTreeMap::new(), | |
1063 | BTreeMap::new()); | |
1064 | ||
1065 | #[cfg(feature = "std")] | |
1066 | map_impl!( | |
1067 | HashMap<K: Eq + Hash, V, S: BuildHasher + Default>, | |
1068 | map, | |
1069 | HashMap::with_hasher(S::default()), | |
1070 | HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default())); | |
1071 | ||
1072 | //////////////////////////////////////////////////////////////////////////////// | |
1073 | ||
1074 | #[cfg(feature = "std")] | |
abe05a73 XL |
1075 | macro_rules! parse_ip_impl { |
1076 | ($ty:ty; $size: expr) => { | |
041b39d2 XL |
1077 | impl<'de> Deserialize<'de> for $ty { |
1078 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1079 | where | |
1080 | D: Deserializer<'de>, | |
1081 | { | |
abe05a73 XL |
1082 | if deserializer.is_human_readable() { |
1083 | let s = try!(String::deserialize(deserializer)); | |
1084 | s.parse().map_err(Error::custom) | |
1085 | } else { | |
1086 | <[u8; $size]>::deserialize(deserializer).map(<$ty>::from) | |
1087 | } | |
1088 | } | |
1089 | } | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | #[cfg(feature = "std")] | |
1094 | macro_rules! variant_identifier { | |
1095 | ( | |
1096 | $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1097 | $expecting_message: expr, | |
1098 | $variants_name: ident | |
1099 | ) => { | |
1100 | enum $name_kind { | |
1101 | $( $variant ),* | |
1102 | } | |
1103 | ||
1104 | static $variants_name: &'static [&'static str] = &[ $( stringify!($variant) ),*]; | |
1105 | ||
1106 | impl<'de> Deserialize<'de> for $name_kind { | |
1107 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1108 | where | |
1109 | D: Deserializer<'de>, | |
1110 | { | |
1111 | struct KindVisitor; | |
1112 | ||
1113 | impl<'de> Visitor<'de> for KindVisitor { | |
1114 | type Value = $name_kind; | |
1115 | ||
1116 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1117 | formatter.write_str($expecting_message) | |
1118 | } | |
1119 | ||
1120 | fn visit_u32<E>(self, value: u32) -> Result<Self::Value, E> | |
1121 | where | |
1122 | E: Error, | |
1123 | { | |
1124 | match value { | |
1125 | $( | |
1126 | $index => Ok($name_kind :: $variant), | |
1127 | )* | |
1128 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value as u64), &self),), | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
1133 | where | |
1134 | E: Error, | |
1135 | { | |
1136 | match value { | |
1137 | $( | |
1138 | stringify!($variant) => Ok($name_kind :: $variant), | |
1139 | )* | |
1140 | _ => Err(Error::unknown_variant(value, $variants_name)), | |
1141 | } | |
1142 | } | |
1143 | ||
1144 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> | |
1145 | where | |
1146 | E: Error, | |
1147 | { | |
1148 | match value { | |
1149 | $( | |
1150 | $bytes => Ok($name_kind :: $variant), | |
1151 | )* | |
1152 | _ => { | |
1153 | match str::from_utf8(value) { | |
1154 | Ok(value) => Err(Error::unknown_variant(value, $variants_name)), | |
1155 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(value), &self)), | |
1156 | } | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | deserializer.deserialize_identifier(KindVisitor) | |
1163 | } | |
1164 | } | |
1165 | } | |
1166 | } | |
1167 | ||
1168 | #[cfg(feature = "std")] | |
1169 | macro_rules! deserialize_enum { | |
1170 | ( | |
1171 | $name: ident $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1172 | $expecting_message: expr, | |
1173 | $deserializer: expr | |
1174 | ) => { | |
1175 | variant_identifier!{ | |
1176 | $name_kind ( $($variant; $bytes; $index),* ) | |
1177 | $expecting_message, | |
1178 | VARIANTS | |
1179 | } | |
1180 | ||
1181 | struct EnumVisitor; | |
1182 | impl<'de> Visitor<'de> for EnumVisitor { | |
1183 | type Value = $name; | |
1184 | ||
1185 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1186 | formatter.write_str(concat!("a ", stringify!($name))) | |
1187 | } | |
1188 | ||
1189 | ||
1190 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> | |
1191 | where | |
1192 | A: EnumAccess<'de>, | |
1193 | { | |
1194 | match try!(data.variant()) { | |
1195 | $( | |
1196 | ($name_kind :: $variant, v) => v.newtype_variant().map($name :: $variant), | |
1197 | )* | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | $deserializer.deserialize_enum(stringify!($name), VARIANTS, EnumVisitor) | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | #[cfg(feature = "std")] | |
1206 | impl<'de> Deserialize<'de> for net::IpAddr { | |
1207 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1208 | where | |
1209 | D: Deserializer<'de>, | |
1210 | { | |
1211 | if deserializer.is_human_readable() { | |
1212 | let s = try!(String::deserialize(deserializer)); | |
1213 | s.parse().map_err(Error::custom) | |
1214 | } else { | |
1215 | use lib::net::IpAddr; | |
1216 | deserialize_enum!{ | |
1217 | IpAddr IpAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) | |
1218 | "`V4` or `V6`", | |
1219 | deserializer | |
041b39d2 XL |
1220 | } |
1221 | } | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | #[cfg(feature = "std")] | |
abe05a73 | 1226 | parse_ip_impl!(net::Ipv4Addr; 4); |
041b39d2 XL |
1227 | |
1228 | #[cfg(feature = "std")] | |
abe05a73 | 1229 | parse_ip_impl!(net::Ipv6Addr; 16); |
041b39d2 XL |
1230 | |
1231 | #[cfg(feature = "std")] | |
abe05a73 XL |
1232 | macro_rules! parse_socket_impl { |
1233 | ($ty:ty, $new: expr) => { | |
1234 | impl<'de> Deserialize<'de> for $ty { | |
1235 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1236 | where | |
1237 | D: Deserializer<'de>, | |
1238 | { | |
1239 | if deserializer.is_human_readable() { | |
1240 | let s = try!(String::deserialize(deserializer)); | |
1241 | s.parse().map_err(Error::custom) | |
1242 | } else { | |
1243 | <(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port)) | |
1244 | } | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | } | |
041b39d2 XL |
1249 | |
1250 | #[cfg(feature = "std")] | |
abe05a73 XL |
1251 | impl<'de> Deserialize<'de> for net::SocketAddr { |
1252 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1253 | where | |
1254 | D: Deserializer<'de>, | |
1255 | { | |
1256 | if deserializer.is_human_readable() { | |
1257 | let s = try!(String::deserialize(deserializer)); | |
1258 | s.parse().map_err(Error::custom) | |
1259 | } else { | |
1260 | use lib::net::SocketAddr; | |
1261 | deserialize_enum!{ | |
1262 | SocketAddr SocketAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) | |
1263 | "`V4` or `V6`", | |
1264 | deserializer | |
1265 | } | |
1266 | } | |
1267 | } | |
1268 | } | |
041b39d2 XL |
1269 | |
1270 | #[cfg(feature = "std")] | |
abe05a73 | 1271 | parse_socket_impl!(net::SocketAddrV4, net::SocketAddrV4::new); |
041b39d2 XL |
1272 | |
1273 | #[cfg(feature = "std")] | |
ff7c6d11 XL |
1274 | parse_socket_impl!(net::SocketAddrV6, |ip, port| net::SocketAddrV6::new( |
1275 | ip, | |
1276 | port, | |
1277 | 0, | |
1278 | 0 | |
1279 | )); | |
041b39d2 XL |
1280 | |
1281 | //////////////////////////////////////////////////////////////////////////////// | |
1282 | ||
1283 | #[cfg(feature = "std")] | |
1284 | struct PathVisitor; | |
1285 | ||
1286 | #[cfg(feature = "std")] | |
1287 | impl<'a> Visitor<'a> for PathVisitor { | |
1288 | type Value = &'a Path; | |
1289 | ||
1290 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1291 | formatter.write_str("a borrowed path") | |
1292 | } | |
1293 | ||
1294 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
1295 | where | |
1296 | E: Error, | |
1297 | { | |
1298 | Ok(v.as_ref()) | |
1299 | } | |
1300 | ||
1301 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
1302 | where | |
1303 | E: Error, | |
1304 | { | |
1305 | str::from_utf8(v) | |
1306 | .map(AsRef::as_ref) | |
1307 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
1308 | } | |
1309 | } | |
1310 | ||
1311 | #[cfg(feature = "std")] | |
1312 | impl<'de: 'a, 'a> Deserialize<'de> for &'a Path { | |
1313 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1314 | where | |
1315 | D: Deserializer<'de>, | |
1316 | { | |
1317 | deserializer.deserialize_str(PathVisitor) | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | #[cfg(feature = "std")] | |
1322 | struct PathBufVisitor; | |
1323 | ||
1324 | #[cfg(feature = "std")] | |
1325 | impl<'de> Visitor<'de> for PathBufVisitor { | |
1326 | type Value = PathBuf; | |
1327 | ||
1328 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1329 | formatter.write_str("path string") | |
1330 | } | |
1331 | ||
1332 | fn visit_str<E>(self, v: &str) -> Result<PathBuf, E> | |
1333 | where | |
1334 | E: Error, | |
1335 | { | |
1336 | Ok(From::from(v)) | |
1337 | } | |
1338 | ||
1339 | fn visit_string<E>(self, v: String) -> Result<PathBuf, E> | |
1340 | where | |
1341 | E: Error, | |
1342 | { | |
1343 | Ok(From::from(v)) | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | #[cfg(feature = "std")] | |
1348 | impl<'de> Deserialize<'de> for PathBuf { | |
1349 | fn deserialize<D>(deserializer: D) -> Result<PathBuf, D::Error> | |
1350 | where | |
1351 | D: Deserializer<'de>, | |
1352 | { | |
1353 | deserializer.deserialize_string(PathBufVisitor) | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | //////////////////////////////////////////////////////////////////////////////// | |
1358 | ||
1359 | // If this were outside of the serde crate, it would just use: | |
1360 | // | |
1361 | // #[derive(Deserialize)] | |
1362 | // #[serde(variant_identifier)] | |
1363 | #[cfg(all(feature = "std", any(unix, windows)))] | |
abe05a73 XL |
1364 | variant_identifier!{ |
1365 | OsStringKind (Unix; b"Unix"; 0, Windows; b"Windows"; 1) | |
1366 | "`Unix` or `Windows`", | |
1367 | OSSTR_VARIANTS | |
041b39d2 XL |
1368 | } |
1369 | ||
1370 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1371 | struct OsStringVisitor; | |
1372 | ||
1373 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1374 | impl<'de> Visitor<'de> for OsStringVisitor { | |
1375 | type Value = OsString; | |
1376 | ||
1377 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1378 | formatter.write_str("os string") | |
1379 | } | |
1380 | ||
1381 | #[cfg(unix)] | |
1382 | fn visit_enum<A>(self, data: A) -> Result<OsString, A::Error> | |
1383 | where | |
1384 | A: EnumAccess<'de>, | |
1385 | { | |
1386 | use std::os::unix::ffi::OsStringExt; | |
1387 | ||
1388 | match try!(data.variant()) { | |
1389 | (OsStringKind::Unix, v) => v.newtype_variant().map(OsString::from_vec), | |
ff7c6d11 XL |
1390 | (OsStringKind::Windows, _) => Err(Error::custom( |
1391 | "cannot deserialize Windows OS string on Unix", | |
1392 | )), | |
041b39d2 XL |
1393 | } |
1394 | } | |
1395 | ||
1396 | #[cfg(windows)] | |
1397 | fn visit_enum<A>(self, data: A) -> Result<OsString, A::Error> | |
1398 | where | |
1399 | A: EnumAccess<'de>, | |
1400 | { | |
1401 | use std::os::windows::ffi::OsStringExt; | |
1402 | ||
1403 | match try!(data.variant()) { | |
ff7c6d11 XL |
1404 | (OsStringKind::Windows, v) => v.newtype_variant::<Vec<u16>>() |
1405 | .map(|vec| OsString::from_wide(&vec)), | |
1406 | (OsStringKind::Unix, _) => Err(Error::custom( | |
1407 | "cannot deserialize Unix OS string on Windows", | |
1408 | )), | |
041b39d2 XL |
1409 | } |
1410 | } | |
1411 | } | |
1412 | ||
1413 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1414 | impl<'de> Deserialize<'de> for OsString { | |
1415 | fn deserialize<D>(deserializer: D) -> Result<OsString, D::Error> | |
1416 | where | |
1417 | D: Deserializer<'de>, | |
1418 | { | |
1419 | deserializer.deserialize_enum("OsString", OSSTR_VARIANTS, OsStringVisitor) | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | //////////////////////////////////////////////////////////////////////////////// | |
1424 | ||
1425 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1426 | forwarded_impl!((T), Box<T>, Box::new); |
041b39d2 XL |
1427 | |
1428 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1429 | forwarded_impl!((T), Box<[T]>, Vec::into_boxed_slice); |
041b39d2 XL |
1430 | |
1431 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1432 | forwarded_impl!((), Box<str>, String::into_boxed_str); |
041b39d2 | 1433 | |
ea8adc8c | 1434 | #[cfg(all(not(feature = "unstable"), feature = "rc", any(feature = "std", feature = "alloc")))] |
3b2f2976 | 1435 | forwarded_impl!((T), Arc<T>, Arc::new); |
041b39d2 | 1436 | |
ea8adc8c | 1437 | #[cfg(all(not(feature = "unstable"), feature = "rc", any(feature = "std", feature = "alloc")))] |
3b2f2976 | 1438 | forwarded_impl!((T), Rc<T>, Rc::new); |
041b39d2 XL |
1439 | |
1440 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1441 | impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T> | |
1442 | where | |
1443 | T: ToOwned, | |
1444 | T::Owned: Deserialize<'de>, | |
1445 | { | |
1446 | #[inline] | |
1447 | fn deserialize<D>(deserializer: D) -> Result<Cow<'a, T>, D::Error> | |
1448 | where | |
1449 | D: Deserializer<'de>, | |
1450 | { | |
1451 | T::Owned::deserialize(deserializer).map(Cow::Owned) | |
1452 | } | |
1453 | } | |
1454 | ||
1455 | //////////////////////////////////////////////////////////////////////////////// | |
ea8adc8c XL |
1456 | |
1457 | #[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))] | |
1458 | macro_rules! box_forwarded_impl { | |
1459 | ($t:ident) => { | |
1460 | impl<'de, T: ?Sized> Deserialize<'de> for $t<T> | |
1461 | where | |
1462 | Box<T>: Deserialize<'de>, | |
1463 | { | |
1464 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1465 | where | |
1466 | D: Deserializer<'de>, | |
1467 | { | |
1468 | Box::deserialize(deserializer).map(Into::into) | |
1469 | } | |
1470 | } | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | #[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))] | |
1475 | box_forwarded_impl!(Rc); | |
1476 | ||
1477 | #[cfg(all(feature = "unstable", feature = "rc", any(feature = "std", feature = "alloc")))] | |
1478 | box_forwarded_impl!(Arc); | |
1479 | ||
1480 | //////////////////////////////////////////////////////////////////////////////// | |
041b39d2 XL |
1481 | |
1482 | impl<'de, T> Deserialize<'de> for Cell<T> | |
1483 | where | |
1484 | T: Deserialize<'de> + Copy, | |
1485 | { | |
1486 | fn deserialize<D>(deserializer: D) -> Result<Cell<T>, D::Error> | |
1487 | where | |
1488 | D: Deserializer<'de>, | |
1489 | { | |
1490 | T::deserialize(deserializer).map(Cell::new) | |
1491 | } | |
1492 | } | |
1493 | ||
3b2f2976 | 1494 | forwarded_impl!((T), RefCell<T>, RefCell::new); |
041b39d2 XL |
1495 | |
1496 | #[cfg(feature = "std")] | |
3b2f2976 | 1497 | forwarded_impl!((T), Mutex<T>, Mutex::new); |
041b39d2 XL |
1498 | |
1499 | #[cfg(feature = "std")] | |
3b2f2976 | 1500 | forwarded_impl!((T), RwLock<T>, RwLock::new); |
041b39d2 XL |
1501 | |
1502 | //////////////////////////////////////////////////////////////////////////////// | |
1503 | ||
1504 | // This is a cleaned-up version of the impl generated by: | |
1505 | // | |
1506 | // #[derive(Deserialize)] | |
1507 | // #[serde(deny_unknown_fields)] | |
1508 | // struct Duration { | |
1509 | // secs: u64, | |
1510 | // nanos: u32, | |
1511 | // } | |
1512 | #[cfg(feature = "std")] | |
1513 | impl<'de> Deserialize<'de> for Duration { | |
1514 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1515 | where | |
1516 | D: Deserializer<'de>, | |
1517 | { | |
1518 | // If this were outside of the serde crate, it would just use: | |
1519 | // | |
1520 | // #[derive(Deserialize)] | |
1521 | // #[serde(field_identifier, rename_all = "lowercase")] | |
1522 | enum Field { | |
1523 | Secs, | |
1524 | Nanos, | |
1525 | }; | |
1526 | ||
1527 | impl<'de> Deserialize<'de> for Field { | |
1528 | fn deserialize<D>(deserializer: D) -> Result<Field, D::Error> | |
1529 | where | |
1530 | D: Deserializer<'de>, | |
1531 | { | |
1532 | struct FieldVisitor; | |
1533 | ||
1534 | impl<'de> Visitor<'de> for FieldVisitor { | |
1535 | type Value = Field; | |
1536 | ||
1537 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1538 | formatter.write_str("`secs` or `nanos`") | |
1539 | } | |
1540 | ||
1541 | fn visit_str<E>(self, value: &str) -> Result<Field, E> | |
1542 | where | |
1543 | E: Error, | |
1544 | { | |
1545 | match value { | |
1546 | "secs" => Ok(Field::Secs), | |
1547 | "nanos" => Ok(Field::Nanos), | |
1548 | _ => Err(Error::unknown_field(value, FIELDS)), | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Field, E> | |
1553 | where | |
1554 | E: Error, | |
1555 | { | |
1556 | match value { | |
1557 | b"secs" => Ok(Field::Secs), | |
1558 | b"nanos" => Ok(Field::Nanos), | |
1559 | _ => { | |
1560 | let value = String::from_utf8_lossy(value); | |
1561 | Err(Error::unknown_field(&value, FIELDS)) | |
1562 | } | |
1563 | } | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | deserializer.deserialize_identifier(FieldVisitor) | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | struct DurationVisitor; | |
1572 | ||
1573 | impl<'de> Visitor<'de> for DurationVisitor { | |
1574 | type Value = Duration; | |
1575 | ||
1576 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1577 | formatter.write_str("struct Duration") | |
1578 | } | |
1579 | ||
1580 | fn visit_seq<A>(self, mut seq: A) -> Result<Duration, A::Error> | |
1581 | where | |
1582 | A: SeqAccess<'de>, | |
1583 | { | |
1584 | let secs: u64 = match try!(seq.next_element()) { | |
1585 | Some(value) => value, | |
1586 | None => { | |
1587 | return Err(Error::invalid_length(0, &self)); | |
1588 | } | |
1589 | }; | |
1590 | let nanos: u32 = match try!(seq.next_element()) { | |
1591 | Some(value) => value, | |
1592 | None => { | |
1593 | return Err(Error::invalid_length(1, &self)); | |
1594 | } | |
1595 | }; | |
1596 | Ok(Duration::new(secs, nanos)) | |
1597 | } | |
1598 | ||
1599 | fn visit_map<A>(self, mut map: A) -> Result<Duration, A::Error> | |
1600 | where | |
1601 | A: MapAccess<'de>, | |
1602 | { | |
1603 | let mut secs: Option<u64> = None; | |
1604 | let mut nanos: Option<u32> = None; | |
1605 | while let Some(key) = try!(map.next_key()) { | |
1606 | match key { | |
1607 | Field::Secs => { | |
1608 | if secs.is_some() { | |
1609 | return Err(<A::Error as Error>::duplicate_field("secs")); | |
1610 | } | |
1611 | secs = Some(try!(map.next_value())); | |
1612 | } | |
1613 | Field::Nanos => { | |
1614 | if nanos.is_some() { | |
1615 | return Err(<A::Error as Error>::duplicate_field("nanos")); | |
1616 | } | |
1617 | nanos = Some(try!(map.next_value())); | |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | let secs = match secs { | |
1622 | Some(secs) => secs, | |
1623 | None => return Err(<A::Error as Error>::missing_field("secs")), | |
1624 | }; | |
1625 | let nanos = match nanos { | |
1626 | Some(nanos) => nanos, | |
1627 | None => return Err(<A::Error as Error>::missing_field("nanos")), | |
1628 | }; | |
1629 | Ok(Duration::new(secs, nanos)) | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | const FIELDS: &'static [&'static str] = &["secs", "nanos"]; | |
1634 | deserializer.deserialize_struct("Duration", FIELDS, DurationVisitor) | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | //////////////////////////////////////////////////////////////////////////////// | |
1639 | ||
1640 | #[cfg(feature = "std")] | |
1641 | impl<'de> Deserialize<'de> for SystemTime { | |
1642 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1643 | where | |
1644 | D: Deserializer<'de>, | |
1645 | { | |
1646 | // Reuse duration | |
1647 | enum Field { | |
1648 | Secs, | |
1649 | Nanos, | |
1650 | }; | |
1651 | ||
1652 | impl<'de> Deserialize<'de> for Field { | |
1653 | fn deserialize<D>(deserializer: D) -> Result<Field, D::Error> | |
1654 | where | |
1655 | D: Deserializer<'de>, | |
1656 | { | |
1657 | struct FieldVisitor; | |
1658 | ||
1659 | impl<'de> Visitor<'de> for FieldVisitor { | |
1660 | type Value = Field; | |
1661 | ||
1662 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1663 | formatter.write_str("`secs_since_epoch` or `nanos_since_epoch`") | |
1664 | } | |
1665 | ||
1666 | fn visit_str<E>(self, value: &str) -> Result<Field, E> | |
1667 | where | |
1668 | E: Error, | |
1669 | { | |
1670 | match value { | |
1671 | "secs_since_epoch" => Ok(Field::Secs), | |
1672 | "nanos_since_epoch" => Ok(Field::Nanos), | |
1673 | _ => Err(Error::unknown_field(value, FIELDS)), | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Field, E> | |
1678 | where | |
1679 | E: Error, | |
1680 | { | |
1681 | match value { | |
1682 | b"secs_since_epoch" => Ok(Field::Secs), | |
1683 | b"nanos_since_epoch" => Ok(Field::Nanos), | |
1684 | _ => { | |
1685 | let value = String::from_utf8_lossy(value); | |
1686 | Err(Error::unknown_field(&value, FIELDS)) | |
1687 | } | |
1688 | } | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | deserializer.deserialize_identifier(FieldVisitor) | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | struct DurationVisitor; | |
1697 | ||
1698 | impl<'de> Visitor<'de> for DurationVisitor { | |
1699 | type Value = Duration; | |
1700 | ||
1701 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1702 | formatter.write_str("struct SystemTime") | |
1703 | } | |
1704 | ||
1705 | fn visit_seq<A>(self, mut seq: A) -> Result<Duration, A::Error> | |
1706 | where | |
1707 | A: SeqAccess<'de>, | |
1708 | { | |
1709 | let secs: u64 = match try!(seq.next_element()) { | |
1710 | Some(value) => value, | |
1711 | None => { | |
1712 | return Err(Error::invalid_length(0, &self)); | |
1713 | } | |
1714 | }; | |
1715 | let nanos: u32 = match try!(seq.next_element()) { | |
1716 | Some(value) => value, | |
1717 | None => { | |
1718 | return Err(Error::invalid_length(1, &self)); | |
1719 | } | |
1720 | }; | |
1721 | Ok(Duration::new(secs, nanos)) | |
1722 | } | |
1723 | ||
1724 | fn visit_map<A>(self, mut map: A) -> Result<Duration, A::Error> | |
1725 | where | |
1726 | A: MapAccess<'de>, | |
1727 | { | |
1728 | let mut secs: Option<u64> = None; | |
1729 | let mut nanos: Option<u32> = None; | |
1730 | while let Some(key) = try!(map.next_key()) { | |
1731 | match key { | |
1732 | Field::Secs => { | |
1733 | if secs.is_some() { | |
ff7c6d11 XL |
1734 | return Err(<A::Error as Error>::duplicate_field( |
1735 | "secs_since_epoch", | |
1736 | )); | |
041b39d2 XL |
1737 | } |
1738 | secs = Some(try!(map.next_value())); | |
1739 | } | |
1740 | Field::Nanos => { | |
1741 | if nanos.is_some() { | |
ff7c6d11 XL |
1742 | return Err(<A::Error as Error>::duplicate_field( |
1743 | "nanos_since_epoch", | |
1744 | )); | |
041b39d2 XL |
1745 | } |
1746 | nanos = Some(try!(map.next_value())); | |
1747 | } | |
1748 | } | |
1749 | } | |
1750 | let secs = match secs { | |
1751 | Some(secs) => secs, | |
1752 | None => return Err(<A::Error as Error>::missing_field("secs_since_epoch")), | |
1753 | }; | |
1754 | let nanos = match nanos { | |
1755 | Some(nanos) => nanos, | |
1756 | None => return Err(<A::Error as Error>::missing_field("nanos_since_epoch")), | |
1757 | }; | |
1758 | Ok(Duration::new(secs, nanos)) | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | const FIELDS: &'static [&'static str] = &["secs_since_epoch", "nanos_since_epoch"]; | |
1763 | let duration = try!(deserializer.deserialize_struct("SystemTime", FIELDS, DurationVisitor)); | |
1764 | Ok(UNIX_EPOCH + duration) | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | //////////////////////////////////////////////////////////////////////////////// | |
1769 | ||
1770 | // Similar to: | |
1771 | // | |
1772 | // #[derive(Deserialize)] | |
1773 | // #[serde(deny_unknown_fields)] | |
1774 | // struct Range { | |
1775 | // start: u64, | |
1776 | // end: u32, | |
1777 | // } | |
1778 | #[cfg(feature = "std")] | |
1779 | impl<'de, Idx> Deserialize<'de> for ops::Range<Idx> | |
1780 | where | |
1781 | Idx: Deserialize<'de>, | |
1782 | { | |
1783 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1784 | where | |
1785 | D: Deserializer<'de>, | |
1786 | { | |
1787 | // If this were outside of the serde crate, it would just use: | |
1788 | // | |
1789 | // #[derive(Deserialize)] | |
1790 | // #[serde(field_identifier, rename_all = "lowercase")] | |
1791 | enum Field { | |
1792 | Start, | |
1793 | End, | |
1794 | }; | |
1795 | ||
1796 | impl<'de> Deserialize<'de> for Field { | |
1797 | fn deserialize<D>(deserializer: D) -> Result<Field, D::Error> | |
1798 | where | |
1799 | D: Deserializer<'de>, | |
1800 | { | |
1801 | struct FieldVisitor; | |
1802 | ||
1803 | impl<'de> Visitor<'de> for FieldVisitor { | |
1804 | type Value = Field; | |
1805 | ||
1806 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1807 | formatter.write_str("`start` or `end`") | |
1808 | } | |
1809 | ||
1810 | fn visit_str<E>(self, value: &str) -> Result<Field, E> | |
1811 | where | |
1812 | E: Error, | |
1813 | { | |
1814 | match value { | |
1815 | "start" => Ok(Field::Start), | |
1816 | "end" => Ok(Field::End), | |
1817 | _ => Err(Error::unknown_field(value, FIELDS)), | |
1818 | } | |
1819 | } | |
1820 | ||
1821 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Field, E> | |
1822 | where | |
1823 | E: Error, | |
1824 | { | |
1825 | match value { | |
1826 | b"start" => Ok(Field::Start), | |
1827 | b"end" => Ok(Field::End), | |
1828 | _ => { | |
1829 | let value = String::from_utf8_lossy(value); | |
1830 | Err(Error::unknown_field(&value, FIELDS)) | |
1831 | } | |
1832 | } | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | deserializer.deserialize_identifier(FieldVisitor) | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | struct RangeVisitor<Idx> { | |
1841 | phantom: PhantomData<Idx>, | |
1842 | } | |
1843 | ||
1844 | impl<'de, Idx> Visitor<'de> for RangeVisitor<Idx> | |
1845 | where | |
1846 | Idx: Deserialize<'de>, | |
1847 | { | |
1848 | type Value = ops::Range<Idx>; | |
1849 | ||
1850 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1851 | formatter.write_str("struct Range") | |
1852 | } | |
1853 | ||
1854 | fn visit_seq<A>(self, mut seq: A) -> Result<ops::Range<Idx>, A::Error> | |
1855 | where | |
1856 | A: SeqAccess<'de>, | |
1857 | { | |
1858 | let start: Idx = match try!(seq.next_element()) { | |
1859 | Some(value) => value, | |
1860 | None => { | |
1861 | return Err(Error::invalid_length(0, &self)); | |
1862 | } | |
1863 | }; | |
1864 | let end: Idx = match try!(seq.next_element()) { | |
1865 | Some(value) => value, | |
1866 | None => { | |
1867 | return Err(Error::invalid_length(1, &self)); | |
1868 | } | |
1869 | }; | |
1870 | Ok(start..end) | |
1871 | } | |
1872 | ||
1873 | fn visit_map<A>(self, mut map: A) -> Result<ops::Range<Idx>, A::Error> | |
1874 | where | |
1875 | A: MapAccess<'de>, | |
1876 | { | |
1877 | let mut start: Option<Idx> = None; | |
1878 | let mut end: Option<Idx> = None; | |
1879 | while let Some(key) = try!(map.next_key()) { | |
1880 | match key { | |
1881 | Field::Start => { | |
1882 | if start.is_some() { | |
1883 | return Err(<A::Error as Error>::duplicate_field("start")); | |
1884 | } | |
1885 | start = Some(try!(map.next_value())); | |
1886 | } | |
1887 | Field::End => { | |
1888 | if end.is_some() { | |
1889 | return Err(<A::Error as Error>::duplicate_field("end")); | |
1890 | } | |
1891 | end = Some(try!(map.next_value())); | |
1892 | } | |
1893 | } | |
1894 | } | |
1895 | let start = match start { | |
1896 | Some(start) => start, | |
1897 | None => return Err(<A::Error as Error>::missing_field("start")), | |
1898 | }; | |
1899 | let end = match end { | |
1900 | Some(end) => end, | |
1901 | None => return Err(<A::Error as Error>::missing_field("end")), | |
1902 | }; | |
1903 | Ok(start..end) | |
1904 | } | |
1905 | } | |
1906 | ||
1907 | const FIELDS: &'static [&'static str] = &["start", "end"]; | |
ff7c6d11 XL |
1908 | deserializer.deserialize_struct( |
1909 | "Range", | |
1910 | FIELDS, | |
1911 | RangeVisitor { | |
1912 | phantom: PhantomData, | |
1913 | }, | |
1914 | ) | |
041b39d2 XL |
1915 | } |
1916 | } | |
1917 | ||
1918 | //////////////////////////////////////////////////////////////////////////////// | |
1919 | ||
1920 | #[cfg(feature = "unstable")] | |
0531ce1d | 1921 | #[allow(deprecated)] |
041b39d2 XL |
1922 | impl<'de, T> Deserialize<'de> for NonZero<T> |
1923 | where | |
1924 | T: Deserialize<'de> + Zeroable, | |
1925 | { | |
1926 | fn deserialize<D>(deserializer: D) -> Result<NonZero<T>, D::Error> | |
1927 | where | |
1928 | D: Deserializer<'de>, | |
1929 | { | |
1930 | let value = try!(Deserialize::deserialize(deserializer)); | |
3b2f2976 XL |
1931 | match NonZero::new(value) { |
1932 | Some(nonzero) => Ok(nonzero), | |
1933 | None => Err(Error::custom("expected a non-zero value")), | |
041b39d2 XL |
1934 | } |
1935 | } | |
1936 | } | |
1937 | ||
0531ce1d XL |
1938 | macro_rules! nonzero_integers { |
1939 | ( $( $T: ty, )+ ) => { | |
1940 | $( | |
1941 | #[cfg(feature = "unstable")] | |
1942 | impl<'de> Deserialize<'de> for $T { | |
1943 | fn deserialize<D>(deserializer: D) -> Result<$T, D::Error> | |
1944 | where | |
1945 | D: Deserializer<'de>, | |
1946 | { | |
1947 | let value = try!(Deserialize::deserialize(deserializer)); | |
1948 | match <$T>::new(value) { | |
1949 | Some(nonzero) => Ok(nonzero), | |
1950 | None => Err(Error::custom("expected a non-zero value")), | |
1951 | } | |
1952 | } | |
1953 | } | |
1954 | )+ | |
1955 | }; | |
1956 | } | |
1957 | ||
1958 | nonzero_integers! { | |
1959 | // Not including signed NonZeroI* since they might be removed | |
1960 | NonZeroU8, | |
1961 | NonZeroU16, | |
1962 | NonZeroU32, | |
1963 | NonZeroU64, | |
1964 | // FIXME: https://github.com/serde-rs/serde/issues/1136 NonZeroU128, | |
1965 | NonZeroUsize, | |
1966 | } | |
1967 | ||
041b39d2 XL |
1968 | //////////////////////////////////////////////////////////////////////////////// |
1969 | ||
1970 | impl<'de, T, E> Deserialize<'de> for Result<T, E> | |
1971 | where | |
1972 | T: Deserialize<'de>, | |
1973 | E: Deserialize<'de>, | |
1974 | { | |
1975 | fn deserialize<D>(deserializer: D) -> Result<Result<T, E>, D::Error> | |
1976 | where | |
1977 | D: Deserializer<'de>, | |
1978 | { | |
1979 | // If this were outside of the serde crate, it would just use: | |
1980 | // | |
1981 | // #[derive(Deserialize)] | |
1982 | // #[serde(variant_identifier)] | |
1983 | enum Field { | |
1984 | Ok, | |
1985 | Err, | |
1986 | } | |
1987 | ||
1988 | impl<'de> Deserialize<'de> for Field { | |
1989 | #[inline] | |
1990 | fn deserialize<D>(deserializer: D) -> Result<Field, D::Error> | |
1991 | where | |
1992 | D: Deserializer<'de>, | |
1993 | { | |
1994 | struct FieldVisitor; | |
1995 | ||
1996 | impl<'de> Visitor<'de> for FieldVisitor { | |
1997 | type Value = Field; | |
1998 | ||
1999 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2000 | formatter.write_str("`Ok` or `Err`") | |
2001 | } | |
2002 | ||
2003 | fn visit_u32<E>(self, value: u32) -> Result<Field, E> | |
2004 | where | |
2005 | E: Error, | |
2006 | { | |
2007 | match value { | |
2008 | 0 => Ok(Field::Ok), | |
2009 | 1 => Ok(Field::Err), | |
ff7c6d11 XL |
2010 | _ => Err(Error::invalid_value( |
2011 | Unexpected::Unsigned(value as u64), | |
2012 | &self, | |
2013 | )), | |
041b39d2 XL |
2014 | } |
2015 | } | |
2016 | ||
2017 | fn visit_str<E>(self, value: &str) -> Result<Field, E> | |
2018 | where | |
2019 | E: Error, | |
2020 | { | |
2021 | match value { | |
2022 | "Ok" => Ok(Field::Ok), | |
2023 | "Err" => Ok(Field::Err), | |
2024 | _ => Err(Error::unknown_variant(value, VARIANTS)), | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Field, E> | |
2029 | where | |
2030 | E: Error, | |
2031 | { | |
2032 | match value { | |
2033 | b"Ok" => Ok(Field::Ok), | |
2034 | b"Err" => Ok(Field::Err), | |
ff7c6d11 XL |
2035 | _ => match str::from_utf8(value) { |
2036 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), | |
2037 | Err(_) => { | |
2038 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) | |
041b39d2 | 2039 | } |
ff7c6d11 | 2040 | }, |
041b39d2 XL |
2041 | } |
2042 | } | |
2043 | } | |
2044 | ||
2045 | deserializer.deserialize_identifier(FieldVisitor) | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | struct ResultVisitor<T, E>(PhantomData<Result<T, E>>); | |
2050 | ||
2051 | impl<'de, T, E> Visitor<'de> for ResultVisitor<T, E> | |
2052 | where | |
2053 | T: Deserialize<'de>, | |
2054 | E: Deserialize<'de>, | |
2055 | { | |
2056 | type Value = Result<T, E>; | |
2057 | ||
2058 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2059 | formatter.write_str("enum Result") | |
2060 | } | |
2061 | ||
2062 | fn visit_enum<A>(self, data: A) -> Result<Result<T, E>, A::Error> | |
2063 | where | |
2064 | A: EnumAccess<'de>, | |
2065 | { | |
2066 | match try!(data.variant()) { | |
2067 | (Field::Ok, v) => v.newtype_variant().map(Ok), | |
2068 | (Field::Err, v) => v.newtype_variant().map(Err), | |
2069 | } | |
2070 | } | |
2071 | } | |
2072 | ||
2073 | const VARIANTS: &'static [&'static str] = &["Ok", "Err"]; | |
2074 | ||
2075 | deserializer.deserialize_enum("Result", VARIANTS, ResultVisitor(PhantomData)) | |
2076 | } | |
2077 | } | |
abe05a73 XL |
2078 | |
2079 | //////////////////////////////////////////////////////////////////////////////// | |
2080 | ||
2081 | #[cfg(feature = "std")] | |
2082 | impl<'de, T> Deserialize<'de> for Wrapping<T> | |
2083 | where | |
ff7c6d11 | 2084 | T: Deserialize<'de>, |
abe05a73 XL |
2085 | { |
2086 | fn deserialize<D>(deserializer: D) -> Result<Wrapping<T>, D::Error> | |
2087 | where | |
2088 | D: Deserializer<'de>, | |
2089 | { | |
2090 | Deserialize::deserialize(deserializer).map(Wrapping) | |
2091 | } | |
2092 | } |