1 | use crate::lib::*; |
2 | |
3 | use crate::de::{ |
4 | Deserialize, Deserializer, EnumAccess, Error, MapAccess, SeqAccess, Unexpected, VariantAccess, |
5 | Visitor, |
6 | }; |
7 | |
8 | use crate::seed::InPlaceSeed; |
9 | |
10 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
11 | use crate::de::size_hint; |
12 | |
13 | //////////////////////////////////////////////////////////////////////////////// |
14 | |
15 | struct UnitVisitor; |
16 | |
17 | impl<'de> Visitor<'de> for UnitVisitor { |
18 | type Value = (); |
19 | |
20 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
21 | formatter.write_str("unit" ) |
22 | } |
23 | |
24 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
25 | where |
26 | E: Error, |
27 | { |
28 | Ok(()) |
29 | } |
30 | } |
31 | |
32 | impl<'de> Deserialize<'de> for () { |
33 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
34 | where |
35 | D: Deserializer<'de>, |
36 | { |
37 | deserializer.deserialize_unit(UnitVisitor) |
38 | } |
39 | } |
40 | |
41 | #[cfg (feature = "unstable" )] |
42 | #[cfg_attr (doc_cfg, doc(cfg(feature = "unstable" )))] |
43 | impl<'de> Deserialize<'de> for ! { |
44 | fn deserialize<D>(_deserializer: D) -> Result<Self, D::Error> |
45 | where |
46 | D: Deserializer<'de>, |
47 | { |
48 | Err(Error::custom("cannot deserialize `!`" )) |
49 | } |
50 | } |
51 | |
52 | //////////////////////////////////////////////////////////////////////////////// |
53 | |
54 | struct BoolVisitor; |
55 | |
56 | impl<'de> Visitor<'de> for BoolVisitor { |
57 | type Value = bool; |
58 | |
59 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
60 | formatter.write_str("a boolean" ) |
61 | } |
62 | |
63 | fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E> |
64 | where |
65 | E: Error, |
66 | { |
67 | Ok(v) |
68 | } |
69 | } |
70 | |
71 | impl<'de> Deserialize<'de> for bool { |
72 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
73 | where |
74 | D: Deserializer<'de>, |
75 | { |
76 | deserializer.deserialize_bool(BoolVisitor) |
77 | } |
78 | } |
79 | |
80 | //////////////////////////////////////////////////////////////////////////////// |
81 | |
82 | macro_rules! impl_deserialize_num { |
83 | ($primitive:ident, $nonzero:ident $(cfg($($cfg:tt)*))*, $deserialize:ident $($method:ident!($($val:ident : $visit:ident)*);)*) => { |
84 | impl_deserialize_num!($primitive, $deserialize $($method!($($val : $visit)*);)*); |
85 | |
86 | $(#[cfg($($cfg)*)])* |
87 | impl<'de> Deserialize<'de> for num::$nonzero { |
88 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
89 | where |
90 | D: Deserializer<'de>, |
91 | { |
92 | struct NonZeroVisitor; |
93 | |
94 | impl<'de> Visitor<'de> for NonZeroVisitor { |
95 | type Value = num::$nonzero; |
96 | |
97 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
98 | formatter.write_str(concat!("a nonzero " , stringify!($primitive))) |
99 | } |
100 | |
101 | $($($method!(nonzero $primitive $val : $visit);)*)* |
102 | } |
103 | |
104 | deserializer.$deserialize(NonZeroVisitor) |
105 | } |
106 | } |
107 | }; |
108 | |
109 | ($primitive:ident, $deserialize:ident $($method:ident!($($val:ident : $visit:ident)*);)*) => { |
110 | impl<'de> Deserialize<'de> for $primitive { |
111 | #[inline] |
112 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
113 | where |
114 | D: Deserializer<'de>, |
115 | { |
116 | struct PrimitiveVisitor; |
117 | |
118 | impl<'de> Visitor<'de> for PrimitiveVisitor { |
119 | type Value = $primitive; |
120 | |
121 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
122 | formatter.write_str(stringify!($primitive)) |
123 | } |
124 | |
125 | $($($method!($val : $visit);)*)* |
126 | } |
127 | |
128 | deserializer.$deserialize(PrimitiveVisitor) |
129 | } |
130 | } |
131 | }; |
132 | } |
133 | |
134 | macro_rules! num_self { |
135 | ($ty:ident : $visit:ident) => { |
136 | #[inline] |
137 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
138 | where |
139 | E: Error, |
140 | { |
141 | Ok(v) |
142 | } |
143 | }; |
144 | |
145 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
146 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
147 | where |
148 | E: Error, |
149 | { |
150 | if let Some(nonzero) = Self::Value::new(v) { |
151 | Ok(nonzero) |
152 | } else { |
153 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) |
154 | } |
155 | } |
156 | }; |
157 | } |
158 | |
159 | macro_rules! num_as_self { |
160 | ($ty:ident : $visit:ident) => { |
161 | #[inline] |
162 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
163 | where |
164 | E: Error, |
165 | { |
166 | Ok(v as Self::Value) |
167 | } |
168 | }; |
169 | |
170 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
171 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
172 | where |
173 | E: Error, |
174 | { |
175 | if let Some(nonzero) = Self::Value::new(v as $primitive) { |
176 | Ok(nonzero) |
177 | } else { |
178 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) |
179 | } |
180 | } |
181 | }; |
182 | } |
183 | |
184 | macro_rules! num_as_copysign_self { |
185 | ($ty:ident : $visit:ident) => { |
186 | #[inline] |
187 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
188 | where |
189 | E: Error, |
190 | { |
191 | #[cfg(any(no_float_copysign, not(feature = "std" )))] |
192 | { |
193 | Ok(v as Self::Value) |
194 | } |
195 | |
196 | #[cfg(all(not(no_float_copysign), feature = "std" ))] |
197 | { |
198 | // Preserve sign of NaN. The `as` produces a nondeterministic sign. |
199 | let sign = if v.is_sign_positive() { 1.0 } else { -1.0 }; |
200 | Ok((v as Self::Value).copysign(sign)) |
201 | } |
202 | } |
203 | }; |
204 | } |
205 | |
206 | macro_rules! int_to_int { |
207 | ($ty:ident : $visit:ident) => { |
208 | #[inline] |
209 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
210 | where |
211 | E: Error, |
212 | { |
213 | if Self::Value::min_value() as i64 <= v as i64 |
214 | && v as i64 <= Self::Value::max_value() as i64 |
215 | { |
216 | Ok(v as Self::Value) |
217 | } else { |
218 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
219 | } |
220 | } |
221 | }; |
222 | |
223 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
224 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
225 | where |
226 | E: Error, |
227 | { |
228 | if $primitive::min_value() as i64 <= v as i64 |
229 | && v as i64 <= $primitive::max_value() as i64 |
230 | { |
231 | if let Some(nonzero) = Self::Value::new(v as $primitive) { |
232 | return Ok(nonzero); |
233 | } |
234 | } |
235 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
236 | } |
237 | }; |
238 | } |
239 | |
240 | macro_rules! int_to_uint { |
241 | ($ty:ident : $visit:ident) => { |
242 | #[inline] |
243 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
244 | where |
245 | E: Error, |
246 | { |
247 | if 0 <= v && v as u64 <= Self::Value::max_value() as u64 { |
248 | Ok(v as Self::Value) |
249 | } else { |
250 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
251 | } |
252 | } |
253 | }; |
254 | |
255 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
256 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
257 | where |
258 | E: Error, |
259 | { |
260 | if 0 < v && v as u64 <= $primitive::max_value() as u64 { |
261 | if let Some(nonzero) = Self::Value::new(v as $primitive) { |
262 | return Ok(nonzero); |
263 | } |
264 | } |
265 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
266 | } |
267 | }; |
268 | } |
269 | |
270 | macro_rules! uint_to_self { |
271 | ($ty:ident : $visit:ident) => { |
272 | #[inline] |
273 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
274 | where |
275 | E: Error, |
276 | { |
277 | if v as u64 <= Self::Value::max_value() as u64 { |
278 | Ok(v as Self::Value) |
279 | } else { |
280 | Err(Error::invalid_value(Unexpected::Unsigned(v as u64), &self)) |
281 | } |
282 | } |
283 | }; |
284 | |
285 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
286 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
287 | where |
288 | E: Error, |
289 | { |
290 | if v as u64 <= $primitive::max_value() as u64 { |
291 | if let Some(nonzero) = Self::Value::new(v as $primitive) { |
292 | return Ok(nonzero); |
293 | } |
294 | } |
295 | Err(Error::invalid_value(Unexpected::Unsigned(v as u64), &self)) |
296 | } |
297 | }; |
298 | } |
299 | |
300 | impl_deserialize_num! { |
301 | i8, NonZeroI8 cfg(not(no_num_nonzero_signed)), deserialize_i8 |
302 | num_self!(i8:visit_i8); |
303 | int_to_int!(i16:visit_i16 i32:visit_i32 i64:visit_i64); |
304 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
305 | } |
306 | |
307 | impl_deserialize_num! { |
308 | i16, NonZeroI16 cfg(not(no_num_nonzero_signed)), deserialize_i16 |
309 | num_self!(i16:visit_i16); |
310 | num_as_self!(i8:visit_i8); |
311 | int_to_int!(i32:visit_i32 i64:visit_i64); |
312 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
313 | } |
314 | |
315 | impl_deserialize_num! { |
316 | i32, NonZeroI32 cfg(not(no_num_nonzero_signed)), deserialize_i32 |
317 | num_self!(i32:visit_i32); |
318 | num_as_self!(i8:visit_i8 i16:visit_i16); |
319 | int_to_int!(i64:visit_i64); |
320 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
321 | } |
322 | |
323 | impl_deserialize_num! { |
324 | i64, NonZeroI64 cfg(not(no_num_nonzero_signed)), deserialize_i64 |
325 | num_self!(i64:visit_i64); |
326 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32); |
327 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
328 | } |
329 | |
330 | impl_deserialize_num! { |
331 | isize, NonZeroIsize cfg(not(no_num_nonzero_signed)), deserialize_i64 |
332 | num_as_self!(i8:visit_i8 i16:visit_i16); |
333 | int_to_int!(i32:visit_i32 i64:visit_i64); |
334 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
335 | } |
336 | |
337 | impl_deserialize_num! { |
338 | u8, NonZeroU8, deserialize_u8 |
339 | num_self!(u8:visit_u8); |
340 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
341 | uint_to_self!(u16:visit_u16 u32:visit_u32 u64:visit_u64); |
342 | } |
343 | |
344 | impl_deserialize_num! { |
345 | u16, NonZeroU16, deserialize_u16 |
346 | num_self!(u16:visit_u16); |
347 | num_as_self!(u8:visit_u8); |
348 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
349 | uint_to_self!(u32:visit_u32 u64:visit_u64); |
350 | } |
351 | |
352 | impl_deserialize_num! { |
353 | u32, NonZeroU32, deserialize_u32 |
354 | num_self!(u32:visit_u32); |
355 | num_as_self!(u8:visit_u8 u16:visit_u16); |
356 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
357 | uint_to_self!(u64:visit_u64); |
358 | } |
359 | |
360 | impl_deserialize_num! { |
361 | u64, NonZeroU64, deserialize_u64 |
362 | num_self!(u64:visit_u64); |
363 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32); |
364 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
365 | } |
366 | |
367 | impl_deserialize_num! { |
368 | usize, NonZeroUsize, deserialize_u64 |
369 | num_as_self!(u8:visit_u8 u16:visit_u16); |
370 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
371 | uint_to_self!(u32:visit_u32 u64:visit_u64); |
372 | } |
373 | |
374 | impl_deserialize_num! { |
375 | f32, deserialize_f32 |
376 | num_self!(f32:visit_f32); |
377 | num_as_copysign_self!(f64:visit_f64); |
378 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
379 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
380 | } |
381 | |
382 | impl_deserialize_num! { |
383 | f64, deserialize_f64 |
384 | num_self!(f64:visit_f64); |
385 | num_as_copysign_self!(f32:visit_f32); |
386 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
387 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
388 | } |
389 | |
390 | macro_rules! num_128 { |
391 | ($ty:ident : $visit:ident) => { |
392 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
393 | where |
394 | E: Error, |
395 | { |
396 | if v as i128 >= Self::Value::min_value() as i128 |
397 | && v as u128 <= Self::Value::max_value() as u128 |
398 | { |
399 | Ok(v as Self::Value) |
400 | } else { |
401 | Err(Error::invalid_value( |
402 | Unexpected::Other(stringify!($ty)), |
403 | &self, |
404 | )) |
405 | } |
406 | } |
407 | }; |
408 | |
409 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { |
410 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> |
411 | where |
412 | E: Error, |
413 | { |
414 | if v as i128 >= $primitive::min_value() as i128 |
415 | && v as u128 <= $primitive::max_value() as u128 |
416 | { |
417 | if let Some(nonzero) = Self::Value::new(v as $primitive) { |
418 | Ok(nonzero) |
419 | } else { |
420 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) |
421 | } |
422 | } else { |
423 | Err(Error::invalid_value( |
424 | Unexpected::Other(stringify!($ty)), |
425 | &self, |
426 | )) |
427 | } |
428 | } |
429 | }; |
430 | } |
431 | |
432 | impl_deserialize_num! { |
433 | i128, NonZeroI128 cfg(not(no_num_nonzero_signed)), deserialize_i128 |
434 | num_self!(i128:visit_i128); |
435 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
436 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
437 | num_128!(u128:visit_u128); |
438 | } |
439 | |
440 | impl_deserialize_num! { |
441 | u128, NonZeroU128, deserialize_u128 |
442 | num_self!(u128:visit_u128); |
443 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); |
444 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); |
445 | num_128!(i128:visit_i128); |
446 | } |
447 | |
448 | //////////////////////////////////////////////////////////////////////////////// |
449 | |
450 | struct CharVisitor; |
451 | |
452 | impl<'de> Visitor<'de> for CharVisitor { |
453 | type Value = char; |
454 | |
455 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
456 | formatter.write_str("a character" ) |
457 | } |
458 | |
459 | #[inline ] |
460 | fn visit_char<E>(self, v: char) -> Result<Self::Value, E> |
461 | where |
462 | E: Error, |
463 | { |
464 | Ok(v) |
465 | } |
466 | |
467 | #[inline ] |
468 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
469 | where |
470 | E: Error, |
471 | { |
472 | let mut iter = v.chars(); |
473 | match (iter.next(), iter.next()) { |
474 | (Some(c), None) => Ok(c), |
475 | _ => Err(Error::invalid_value(Unexpected::Str(v), &self)), |
476 | } |
477 | } |
478 | } |
479 | |
480 | impl<'de> Deserialize<'de> for char { |
481 | #[inline ] |
482 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
483 | where |
484 | D: Deserializer<'de>, |
485 | { |
486 | deserializer.deserialize_char(CharVisitor) |
487 | } |
488 | } |
489 | |
490 | //////////////////////////////////////////////////////////////////////////////// |
491 | |
492 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
493 | struct StringVisitor; |
494 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
495 | struct StringInPlaceVisitor<'a>(&'a mut String); |
496 | |
497 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
498 | impl<'de> Visitor<'de> for StringVisitor { |
499 | type Value = String; |
500 | |
501 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
502 | formatter.write_str("a string" ) |
503 | } |
504 | |
505 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
506 | where |
507 | E: Error, |
508 | { |
509 | Ok(v.to_owned()) |
510 | } |
511 | |
512 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
513 | where |
514 | E: Error, |
515 | { |
516 | Ok(v) |
517 | } |
518 | |
519 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
520 | where |
521 | E: Error, |
522 | { |
523 | match str::from_utf8(v) { |
524 | Ok(s) => Ok(s.to_owned()), |
525 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), |
526 | } |
527 | } |
528 | |
529 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
530 | where |
531 | E: Error, |
532 | { |
533 | match String::from_utf8(v) { |
534 | Ok(s) => Ok(s), |
535 | Err(e) => Err(Error::invalid_value( |
536 | Unexpected::Bytes(&e.into_bytes()), |
537 | &self, |
538 | )), |
539 | } |
540 | } |
541 | } |
542 | |
543 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
544 | impl<'a, 'de> Visitor<'de> for StringInPlaceVisitor<'a> { |
545 | type Value = (); |
546 | |
547 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
548 | formatter.write_str("a string" ) |
549 | } |
550 | |
551 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
552 | where |
553 | E: Error, |
554 | { |
555 | self.0.clear(); |
556 | self.0.push_str(v); |
557 | Ok(()) |
558 | } |
559 | |
560 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
561 | where |
562 | E: Error, |
563 | { |
564 | *self.0 = v; |
565 | Ok(()) |
566 | } |
567 | |
568 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
569 | where |
570 | E: Error, |
571 | { |
572 | match str::from_utf8(v) { |
573 | Ok(s) => { |
574 | self.0.clear(); |
575 | self.0.push_str(s); |
576 | Ok(()) |
577 | } |
578 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), |
579 | } |
580 | } |
581 | |
582 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
583 | where |
584 | E: Error, |
585 | { |
586 | match String::from_utf8(v) { |
587 | Ok(s) => { |
588 | *self.0 = s; |
589 | Ok(()) |
590 | } |
591 | Err(e) => Err(Error::invalid_value( |
592 | Unexpected::Bytes(&e.into_bytes()), |
593 | &self, |
594 | )), |
595 | } |
596 | } |
597 | } |
598 | |
599 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
600 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
601 | impl<'de> Deserialize<'de> for String { |
602 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
603 | where |
604 | D: Deserializer<'de>, |
605 | { |
606 | deserializer.deserialize_string(StringVisitor) |
607 | } |
608 | |
609 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
610 | where |
611 | D: Deserializer<'de>, |
612 | { |
613 | deserializer.deserialize_string(StringInPlaceVisitor(place)) |
614 | } |
615 | } |
616 | |
617 | //////////////////////////////////////////////////////////////////////////////// |
618 | |
619 | struct StrVisitor; |
620 | |
621 | impl<'a> Visitor<'a> for StrVisitor { |
622 | type Value = &'a str; |
623 | |
624 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
625 | formatter.write_str("a borrowed string" ) |
626 | } |
627 | |
628 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> |
629 | where |
630 | E: Error, |
631 | { |
632 | Ok(v) // so easy |
633 | } |
634 | |
635 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> |
636 | where |
637 | E: Error, |
638 | { |
639 | str::from_utf8(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) |
640 | } |
641 | } |
642 | |
643 | impl<'de: 'a, 'a> Deserialize<'de> for &'a str { |
644 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
645 | where |
646 | D: Deserializer<'de>, |
647 | { |
648 | deserializer.deserialize_str(StrVisitor) |
649 | } |
650 | } |
651 | |
652 | //////////////////////////////////////////////////////////////////////////////// |
653 | |
654 | struct BytesVisitor; |
655 | |
656 | impl<'a> Visitor<'a> for BytesVisitor { |
657 | type Value = &'a [u8]; |
658 | |
659 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
660 | formatter.write_str("a borrowed byte array" ) |
661 | } |
662 | |
663 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> |
664 | where |
665 | E: Error, |
666 | { |
667 | Ok(v) |
668 | } |
669 | |
670 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> |
671 | where |
672 | E: Error, |
673 | { |
674 | Ok(v.as_bytes()) |
675 | } |
676 | } |
677 | |
678 | impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] { |
679 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
680 | where |
681 | D: Deserializer<'de>, |
682 | { |
683 | deserializer.deserialize_bytes(BytesVisitor) |
684 | } |
685 | } |
686 | |
687 | //////////////////////////////////////////////////////////////////////////////// |
688 | |
689 | #[cfg (any(feature = "std" , all(not(no_core_cstr), feature = "alloc" )))] |
690 | struct CStringVisitor; |
691 | |
692 | #[cfg (any(feature = "std" , all(not(no_core_cstr), feature = "alloc" )))] |
693 | impl<'de> Visitor<'de> for CStringVisitor { |
694 | type Value = CString; |
695 | |
696 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
697 | formatter.write_str("byte array" ) |
698 | } |
699 | |
700 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
701 | where |
702 | A: SeqAccess<'de>, |
703 | { |
704 | let capacity = size_hint::cautious::<u8>(seq.size_hint()); |
705 | let mut values = Vec::<u8>::with_capacity(capacity); |
706 | |
707 | while let Some(value) = tri!(seq.next_element()) { |
708 | values.push(value); |
709 | } |
710 | |
711 | CString::new(values).map_err(Error::custom) |
712 | } |
713 | |
714 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
715 | where |
716 | E: Error, |
717 | { |
718 | CString::new(v).map_err(Error::custom) |
719 | } |
720 | |
721 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
722 | where |
723 | E: Error, |
724 | { |
725 | CString::new(v).map_err(Error::custom) |
726 | } |
727 | |
728 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
729 | where |
730 | E: Error, |
731 | { |
732 | CString::new(v).map_err(Error::custom) |
733 | } |
734 | |
735 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
736 | where |
737 | E: Error, |
738 | { |
739 | CString::new(v).map_err(Error::custom) |
740 | } |
741 | } |
742 | |
743 | #[cfg (any(feature = "std" , all(not(no_core_cstr), feature = "alloc" )))] |
744 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
745 | impl<'de> Deserialize<'de> for CString { |
746 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
747 | where |
748 | D: Deserializer<'de>, |
749 | { |
750 | deserializer.deserialize_byte_buf(CStringVisitor) |
751 | } |
752 | } |
753 | |
754 | macro_rules! forwarded_impl { |
755 | ( |
756 | $(#[$attr:meta])* |
757 | ($($id:ident),*), $ty:ty, $func:expr |
758 | ) => { |
759 | $(#[$attr])* |
760 | impl<'de $(, $id : Deserialize<'de>,)*> Deserialize<'de> for $ty { |
761 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
762 | where |
763 | D: Deserializer<'de>, |
764 | { |
765 | Deserialize::deserialize(deserializer).map($func) |
766 | } |
767 | } |
768 | } |
769 | } |
770 | |
771 | forwarded_impl! { |
772 | #[cfg (any(feature = "std" , all(not(no_core_cstr), feature = "alloc" )))] |
773 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
774 | (), Box<CStr>, CString::into_boxed_c_str |
775 | } |
776 | |
777 | forwarded_impl! { |
778 | (T), Reverse<T>, Reverse |
779 | } |
780 | |
781 | //////////////////////////////////////////////////////////////////////////////// |
782 | |
783 | struct OptionVisitor<T> { |
784 | marker: PhantomData<T>, |
785 | } |
786 | |
787 | impl<'de, T> Visitor<'de> for OptionVisitor<T> |
788 | where |
789 | T: Deserialize<'de>, |
790 | { |
791 | type Value = Option<T>; |
792 | |
793 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
794 | formatter.write_str("option" ) |
795 | } |
796 | |
797 | #[inline ] |
798 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
799 | where |
800 | E: Error, |
801 | { |
802 | Ok(None) |
803 | } |
804 | |
805 | #[inline ] |
806 | fn visit_none<E>(self) -> Result<Self::Value, E> |
807 | where |
808 | E: Error, |
809 | { |
810 | Ok(None) |
811 | } |
812 | |
813 | #[inline ] |
814 | fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> |
815 | where |
816 | D: Deserializer<'de>, |
817 | { |
818 | T::deserialize(deserializer).map(Some) |
819 | } |
820 | |
821 | fn __private_visit_untagged_option<D>(self, deserializer: D) -> Result<Self::Value, ()> |
822 | where |
823 | D: Deserializer<'de>, |
824 | { |
825 | Ok(T::deserialize(deserializer).ok()) |
826 | } |
827 | } |
828 | |
829 | impl<'de, T> Deserialize<'de> for Option<T> |
830 | where |
831 | T: Deserialize<'de>, |
832 | { |
833 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
834 | where |
835 | D: Deserializer<'de>, |
836 | { |
837 | deserializer.deserialize_option(OptionVisitor { |
838 | marker: PhantomData, |
839 | }) |
840 | } |
841 | |
842 | // The Some variant's repr is opaque, so we can't play cute tricks with its |
843 | // tag to have deserialize_in_place build the content in place unconditionally. |
844 | // |
845 | // FIXME: investigate whether branching on the old value being Some to |
846 | // deserialize_in_place the value is profitable (probably data-dependent?) |
847 | } |
848 | |
849 | //////////////////////////////////////////////////////////////////////////////// |
850 | |
851 | struct PhantomDataVisitor<T: ?Sized> { |
852 | marker: PhantomData<T>, |
853 | } |
854 | |
855 | impl<'de, T: ?Sized> Visitor<'de> for PhantomDataVisitor<T> { |
856 | type Value = PhantomData<T>; |
857 | |
858 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
859 | formatter.write_str("unit" ) |
860 | } |
861 | |
862 | #[inline ] |
863 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
864 | where |
865 | E: Error, |
866 | { |
867 | Ok(PhantomData) |
868 | } |
869 | } |
870 | |
871 | impl<'de, T: ?Sized> Deserialize<'de> for PhantomData<T> { |
872 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
873 | where |
874 | D: Deserializer<'de>, |
875 | { |
876 | let visitor = PhantomDataVisitor { |
877 | marker: PhantomData, |
878 | }; |
879 | deserializer.deserialize_unit_struct("PhantomData" , visitor) |
880 | } |
881 | } |
882 | |
883 | //////////////////////////////////////////////////////////////////////////////// |
884 | |
885 | macro_rules! seq_impl { |
886 | ( |
887 | $(#[$attr:meta])* |
888 | $ty:ident <T $(: $tbound1:ident $(+ $tbound2:ident)*)* $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)*>, |
889 | $access:ident, |
890 | $clear:expr, |
891 | $with_capacity:expr, |
892 | $reserve:expr, |
893 | $insert:expr |
894 | ) => { |
895 | $(#[$attr])* |
896 | impl<'de, T $(, $typaram)*> Deserialize<'de> for $ty<T $(, $typaram)*> |
897 | where |
898 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, |
899 | $($typaram: $bound1 $(+ $bound2)*,)* |
900 | { |
901 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
902 | where |
903 | D: Deserializer<'de>, |
904 | { |
905 | struct SeqVisitor<T $(, $typaram)*> { |
906 | marker: PhantomData<$ty<T $(, $typaram)*>>, |
907 | } |
908 | |
909 | impl<'de, T $(, $typaram)*> Visitor<'de> for SeqVisitor<T $(, $typaram)*> |
910 | where |
911 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, |
912 | $($typaram: $bound1 $(+ $bound2)*,)* |
913 | { |
914 | type Value = $ty<T $(, $typaram)*>; |
915 | |
916 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
917 | formatter.write_str("a sequence" ) |
918 | } |
919 | |
920 | #[inline] |
921 | fn visit_seq<A>(self, mut $access: A) -> Result<Self::Value, A::Error> |
922 | where |
923 | A: SeqAccess<'de>, |
924 | { |
925 | let mut values = $with_capacity; |
926 | |
927 | while let Some(value) = tri!($access.next_element()) { |
928 | $insert(&mut values, value); |
929 | } |
930 | |
931 | Ok(values) |
932 | } |
933 | } |
934 | |
935 | let visitor = SeqVisitor { marker: PhantomData }; |
936 | deserializer.deserialize_seq(visitor) |
937 | } |
938 | |
939 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
940 | where |
941 | D: Deserializer<'de>, |
942 | { |
943 | struct SeqInPlaceVisitor<'a, T: 'a $(, $typaram: 'a)*>(&'a mut $ty<T $(, $typaram)*>); |
944 | |
945 | impl<'a, 'de, T $(, $typaram)*> Visitor<'de> for SeqInPlaceVisitor<'a, T $(, $typaram)*> |
946 | where |
947 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, |
948 | $($typaram: $bound1 $(+ $bound2)*,)* |
949 | { |
950 | type Value = (); |
951 | |
952 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
953 | formatter.write_str("a sequence" ) |
954 | } |
955 | |
956 | #[inline] |
957 | fn visit_seq<A>(mut self, mut $access: A) -> Result<Self::Value, A::Error> |
958 | where |
959 | A: SeqAccess<'de>, |
960 | { |
961 | $clear(&mut self.0); |
962 | $reserve(&mut self.0, size_hint::cautious::<T>($access.size_hint())); |
963 | |
964 | // FIXME: try to overwrite old values here? (Vec, VecDeque, LinkedList) |
965 | while let Some(value) = tri!($access.next_element()) { |
966 | $insert(&mut self.0, value); |
967 | } |
968 | |
969 | Ok(()) |
970 | } |
971 | } |
972 | |
973 | deserializer.deserialize_seq(SeqInPlaceVisitor(place)) |
974 | } |
975 | } |
976 | } |
977 | } |
978 | |
979 | // Dummy impl of reserve |
980 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
981 | fn nop_reserve<T>(_seq: T, _n: usize) {} |
982 | |
983 | seq_impl!( |
984 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
985 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
986 | BinaryHeap<T: Ord>, |
987 | seq, |
988 | BinaryHeap::clear, |
989 | BinaryHeap::with_capacity(size_hint::cautious::<T>(seq.size_hint())), |
990 | BinaryHeap::reserve, |
991 | BinaryHeap::push |
992 | ); |
993 | |
994 | seq_impl!( |
995 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
996 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
997 | BTreeSet<T: Eq + Ord>, |
998 | seq, |
999 | BTreeSet::clear, |
1000 | BTreeSet::new(), |
1001 | nop_reserve, |
1002 | BTreeSet::insert |
1003 | ); |
1004 | |
1005 | seq_impl!( |
1006 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1007 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1008 | LinkedList<T>, |
1009 | seq, |
1010 | LinkedList::clear, |
1011 | LinkedList::new(), |
1012 | nop_reserve, |
1013 | LinkedList::push_back |
1014 | ); |
1015 | |
1016 | seq_impl!( |
1017 | #[cfg (feature = "std" )] |
1018 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1019 | HashSet<T: Eq + Hash, S: BuildHasher + Default>, |
1020 | seq, |
1021 | HashSet::clear, |
1022 | HashSet::with_capacity_and_hasher(size_hint::cautious::<T>(seq.size_hint()), S::default()), |
1023 | HashSet::reserve, |
1024 | HashSet::insert |
1025 | ); |
1026 | |
1027 | seq_impl!( |
1028 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1029 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1030 | VecDeque<T>, |
1031 | seq, |
1032 | VecDeque::clear, |
1033 | VecDeque::with_capacity(size_hint::cautious::<T>(seq.size_hint())), |
1034 | VecDeque::reserve, |
1035 | VecDeque::push_back |
1036 | ); |
1037 | |
1038 | //////////////////////////////////////////////////////////////////////////////// |
1039 | |
1040 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1041 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1042 | impl<'de, T> Deserialize<'de> for Vec<T> |
1043 | where |
1044 | T: Deserialize<'de>, |
1045 | { |
1046 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1047 | where |
1048 | D: Deserializer<'de>, |
1049 | { |
1050 | struct VecVisitor<T> { |
1051 | marker: PhantomData<T>, |
1052 | } |
1053 | |
1054 | impl<'de, T> Visitor<'de> for VecVisitor<T> |
1055 | where |
1056 | T: Deserialize<'de>, |
1057 | { |
1058 | type Value = Vec<T>; |
1059 | |
1060 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1061 | formatter.write_str("a sequence" ) |
1062 | } |
1063 | |
1064 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1065 | where |
1066 | A: SeqAccess<'de>, |
1067 | { |
1068 | let capacity = size_hint::cautious::<T>(seq.size_hint()); |
1069 | let mut values = Vec::<T>::with_capacity(capacity); |
1070 | |
1071 | while let Some(value) = tri!(seq.next_element()) { |
1072 | values.push(value); |
1073 | } |
1074 | |
1075 | Ok(values) |
1076 | } |
1077 | } |
1078 | |
1079 | let visitor = VecVisitor { |
1080 | marker: PhantomData, |
1081 | }; |
1082 | deserializer.deserialize_seq(visitor) |
1083 | } |
1084 | |
1085 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
1086 | where |
1087 | D: Deserializer<'de>, |
1088 | { |
1089 | struct VecInPlaceVisitor<'a, T: 'a>(&'a mut Vec<T>); |
1090 | |
1091 | impl<'a, 'de, T> Visitor<'de> for VecInPlaceVisitor<'a, T> |
1092 | where |
1093 | T: Deserialize<'de>, |
1094 | { |
1095 | type Value = (); |
1096 | |
1097 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1098 | formatter.write_str("a sequence" ) |
1099 | } |
1100 | |
1101 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1102 | where |
1103 | A: SeqAccess<'de>, |
1104 | { |
1105 | let hint = size_hint::cautious::<T>(seq.size_hint()); |
1106 | if let Some(additional) = hint.checked_sub(self.0.len()) { |
1107 | self.0.reserve(additional); |
1108 | } |
1109 | |
1110 | for i in 0..self.0.len() { |
1111 | let next = { |
1112 | let next_place = InPlaceSeed(&mut self.0[i]); |
1113 | tri!(seq.next_element_seed(next_place)) |
1114 | }; |
1115 | if next.is_none() { |
1116 | self.0.truncate(i); |
1117 | return Ok(()); |
1118 | } |
1119 | } |
1120 | |
1121 | while let Some(value) = tri!(seq.next_element()) { |
1122 | self.0.push(value); |
1123 | } |
1124 | |
1125 | Ok(()) |
1126 | } |
1127 | } |
1128 | |
1129 | deserializer.deserialize_seq(VecInPlaceVisitor(place)) |
1130 | } |
1131 | } |
1132 | |
1133 | //////////////////////////////////////////////////////////////////////////////// |
1134 | |
1135 | struct ArrayVisitor<A> { |
1136 | marker: PhantomData<A>, |
1137 | } |
1138 | struct ArrayInPlaceVisitor<'a, A: 'a>(&'a mut A); |
1139 | |
1140 | impl<A> ArrayVisitor<A> { |
1141 | fn new() -> Self { |
1142 | ArrayVisitor { |
1143 | marker: PhantomData, |
1144 | } |
1145 | } |
1146 | } |
1147 | |
1148 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; 0]> { |
1149 | type Value = [T; 0]; |
1150 | |
1151 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1152 | formatter.write_str("an empty array" ) |
1153 | } |
1154 | |
1155 | #[inline ] |
1156 | fn visit_seq<A>(self, _: A) -> Result<Self::Value, A::Error> |
1157 | where |
1158 | A: SeqAccess<'de>, |
1159 | { |
1160 | Ok([]) |
1161 | } |
1162 | } |
1163 | |
1164 | // Does not require T: Deserialize<'de>. |
1165 | impl<'de, T> Deserialize<'de> for [T; 0] { |
1166 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1167 | where |
1168 | D: Deserializer<'de>, |
1169 | { |
1170 | deserializer.deserialize_tuple(0, ArrayVisitor::<[T; 0]>::new()) |
1171 | } |
1172 | } |
1173 | |
1174 | macro_rules! array_impls { |
1175 | ($($len:expr => ($($n:tt)+))+) => { |
1176 | $( |
1177 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; $len]> |
1178 | where |
1179 | T: Deserialize<'de>, |
1180 | { |
1181 | type Value = [T; $len]; |
1182 | |
1183 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1184 | formatter.write_str(concat!("an array of length " , $len)) |
1185 | } |
1186 | |
1187 | #[inline] |
1188 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1189 | where |
1190 | A: SeqAccess<'de>, |
1191 | { |
1192 | Ok([$( |
1193 | match tri!(seq.next_element()) { |
1194 | Some(val) => val, |
1195 | None => return Err(Error::invalid_length($n, &self)), |
1196 | } |
1197 | ),+]) |
1198 | } |
1199 | } |
1200 | |
1201 | impl<'a, 'de, T> Visitor<'de> for ArrayInPlaceVisitor<'a, [T; $len]> |
1202 | where |
1203 | T: Deserialize<'de>, |
1204 | { |
1205 | type Value = (); |
1206 | |
1207 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1208 | formatter.write_str(concat!("an array of length " , $len)) |
1209 | } |
1210 | |
1211 | #[inline] |
1212 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1213 | where |
1214 | A: SeqAccess<'de>, |
1215 | { |
1216 | let mut fail_idx = None; |
1217 | for (idx, dest) in self.0[..].iter_mut().enumerate() { |
1218 | if tri!(seq.next_element_seed(InPlaceSeed(dest))).is_none() { |
1219 | fail_idx = Some(idx); |
1220 | break; |
1221 | } |
1222 | } |
1223 | if let Some(idx) = fail_idx { |
1224 | return Err(Error::invalid_length(idx, &self)); |
1225 | } |
1226 | Ok(()) |
1227 | } |
1228 | } |
1229 | |
1230 | impl<'de, T> Deserialize<'de> for [T; $len] |
1231 | where |
1232 | T: Deserialize<'de>, |
1233 | { |
1234 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1235 | where |
1236 | D: Deserializer<'de>, |
1237 | { |
1238 | deserializer.deserialize_tuple($len, ArrayVisitor::<[T; $len]>::new()) |
1239 | } |
1240 | |
1241 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
1242 | where |
1243 | D: Deserializer<'de>, |
1244 | { |
1245 | deserializer.deserialize_tuple($len, ArrayInPlaceVisitor(place)) |
1246 | } |
1247 | } |
1248 | )+ |
1249 | } |
1250 | } |
1251 | |
1252 | array_impls! { |
1253 | 1 => (0) |
1254 | 2 => (0 1) |
1255 | 3 => (0 1 2) |
1256 | 4 => (0 1 2 3) |
1257 | 5 => (0 1 2 3 4) |
1258 | 6 => (0 1 2 3 4 5) |
1259 | 7 => (0 1 2 3 4 5 6) |
1260 | 8 => (0 1 2 3 4 5 6 7) |
1261 | 9 => (0 1 2 3 4 5 6 7 8) |
1262 | 10 => (0 1 2 3 4 5 6 7 8 9) |
1263 | 11 => (0 1 2 3 4 5 6 7 8 9 10) |
1264 | 12 => (0 1 2 3 4 5 6 7 8 9 10 11) |
1265 | 13 => (0 1 2 3 4 5 6 7 8 9 10 11 12) |
1266 | 14 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13) |
1267 | 15 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14) |
1268 | 16 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15) |
1269 | 17 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16) |
1270 | 18 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17) |
1271 | 19 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18) |
1272 | 20 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) |
1273 | 21 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20) |
1274 | 22 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21) |
1275 | 23 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22) |
1276 | 24 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23) |
1277 | 25 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24) |
1278 | 26 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25) |
1279 | 27 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26) |
1280 | 28 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27) |
1281 | 29 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28) |
1282 | 30 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29) |
1283 | 31 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30) |
1284 | 32 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31) |
1285 | } |
1286 | |
1287 | //////////////////////////////////////////////////////////////////////////////// |
1288 | |
1289 | macro_rules! tuple_impls { |
1290 | ($($len:tt => ($($n:tt $name:ident)+))+) => { |
1291 | $( |
1292 | impl<'de, $($name: Deserialize<'de>),+> Deserialize<'de> for ($($name,)+) { |
1293 | #[inline] |
1294 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1295 | where |
1296 | D: Deserializer<'de>, |
1297 | { |
1298 | struct TupleVisitor<$($name,)+> { |
1299 | marker: PhantomData<($($name,)+)>, |
1300 | } |
1301 | |
1302 | impl<'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleVisitor<$($name,)+> { |
1303 | type Value = ($($name,)+); |
1304 | |
1305 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1306 | formatter.write_str(concat!("a tuple of size " , $len)) |
1307 | } |
1308 | |
1309 | #[inline] |
1310 | #[allow(non_snake_case)] |
1311 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1312 | where |
1313 | A: SeqAccess<'de>, |
1314 | { |
1315 | $( |
1316 | let $name = match tri!(seq.next_element()) { |
1317 | Some(value) => value, |
1318 | None => return Err(Error::invalid_length($n, &self)), |
1319 | }; |
1320 | )+ |
1321 | |
1322 | Ok(($($name,)+)) |
1323 | } |
1324 | } |
1325 | |
1326 | deserializer.deserialize_tuple($len, TupleVisitor { marker: PhantomData }) |
1327 | } |
1328 | |
1329 | #[inline] |
1330 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
1331 | where |
1332 | D: Deserializer<'de>, |
1333 | { |
1334 | struct TupleInPlaceVisitor<'a, $($name: 'a,)+>(&'a mut ($($name,)+)); |
1335 | |
1336 | impl<'a, 'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleInPlaceVisitor<'a, $($name,)+> { |
1337 | type Value = (); |
1338 | |
1339 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1340 | formatter.write_str(concat!("a tuple of size " , $len)) |
1341 | } |
1342 | |
1343 | #[inline] |
1344 | #[allow(non_snake_case)] |
1345 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
1346 | where |
1347 | A: SeqAccess<'de>, |
1348 | { |
1349 | $( |
1350 | if tri!(seq.next_element_seed(InPlaceSeed(&mut (self.0).$n))).is_none() { |
1351 | return Err(Error::invalid_length($n, &self)); |
1352 | } |
1353 | )+ |
1354 | |
1355 | Ok(()) |
1356 | } |
1357 | } |
1358 | |
1359 | deserializer.deserialize_tuple($len, TupleInPlaceVisitor(place)) |
1360 | } |
1361 | } |
1362 | )+ |
1363 | } |
1364 | } |
1365 | |
1366 | tuple_impls! { |
1367 | 1 => (0 T0) |
1368 | 2 => (0 T0 1 T1) |
1369 | 3 => (0 T0 1 T1 2 T2) |
1370 | 4 => (0 T0 1 T1 2 T2 3 T3) |
1371 | 5 => (0 T0 1 T1 2 T2 3 T3 4 T4) |
1372 | 6 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5) |
1373 | 7 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6) |
1374 | 8 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7) |
1375 | 9 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8) |
1376 | 10 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9) |
1377 | 11 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10) |
1378 | 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) |
1379 | 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) |
1380 | 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) |
1381 | 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) |
1382 | 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) |
1383 | } |
1384 | |
1385 | //////////////////////////////////////////////////////////////////////////////// |
1386 | |
1387 | macro_rules! map_impl { |
1388 | ( |
1389 | $(#[$attr:meta])* |
1390 | $ty:ident <K $(: $kbound1:ident $(+ $kbound2:ident)*)*, V $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)*>, |
1391 | $access:ident, |
1392 | $with_capacity:expr, |
1393 | ) => { |
1394 | $(#[$attr])* |
1395 | impl<'de, K, V $(, $typaram)*> Deserialize<'de> for $ty<K, V $(, $typaram)*> |
1396 | where |
1397 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, |
1398 | V: Deserialize<'de>, |
1399 | $($typaram: $bound1 $(+ $bound2)*),* |
1400 | { |
1401 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1402 | where |
1403 | D: Deserializer<'de>, |
1404 | { |
1405 | struct MapVisitor<K, V $(, $typaram)*> { |
1406 | marker: PhantomData<$ty<K, V $(, $typaram)*>>, |
1407 | } |
1408 | |
1409 | impl<'de, K, V $(, $typaram)*> Visitor<'de> for MapVisitor<K, V $(, $typaram)*> |
1410 | where |
1411 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, |
1412 | V: Deserialize<'de>, |
1413 | $($typaram: $bound1 $(+ $bound2)*),* |
1414 | { |
1415 | type Value = $ty<K, V $(, $typaram)*>; |
1416 | |
1417 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1418 | formatter.write_str("a map" ) |
1419 | } |
1420 | |
1421 | #[inline] |
1422 | fn visit_map<A>(self, mut $access: A) -> Result<Self::Value, A::Error> |
1423 | where |
1424 | A: MapAccess<'de>, |
1425 | { |
1426 | let mut values = $with_capacity; |
1427 | |
1428 | while let Some((key, value)) = tri!($access.next_entry()) { |
1429 | values.insert(key, value); |
1430 | } |
1431 | |
1432 | Ok(values) |
1433 | } |
1434 | } |
1435 | |
1436 | let visitor = MapVisitor { marker: PhantomData }; |
1437 | deserializer.deserialize_map(visitor) |
1438 | } |
1439 | } |
1440 | } |
1441 | } |
1442 | |
1443 | map_impl! { |
1444 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1445 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1446 | BTreeMap<K: Ord, V>, |
1447 | map, |
1448 | BTreeMap::new(), |
1449 | } |
1450 | |
1451 | map_impl! { |
1452 | #[cfg (feature = "std" )] |
1453 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1454 | HashMap<K: Eq + Hash, V, S: BuildHasher + Default>, |
1455 | map, |
1456 | HashMap::with_capacity_and_hasher(size_hint::cautious::<(K, V)>(map.size_hint()), S::default()), |
1457 | } |
1458 | |
1459 | //////////////////////////////////////////////////////////////////////////////// |
1460 | |
1461 | macro_rules! parse_ip_impl { |
1462 | ( |
1463 | $(#[$attr:meta])* |
1464 | $ty:ty, $expecting:expr, $size:tt |
1465 | ) => { |
1466 | $(#[$attr])* |
1467 | impl<'de> Deserialize<'de> for $ty { |
1468 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1469 | where |
1470 | D: Deserializer<'de>, |
1471 | { |
1472 | if deserializer.is_human_readable() { |
1473 | deserializer.deserialize_str(FromStrVisitor::new($expecting)) |
1474 | } else { |
1475 | <[u8; $size]>::deserialize(deserializer).map(<$ty>::from) |
1476 | } |
1477 | } |
1478 | } |
1479 | }; |
1480 | } |
1481 | |
1482 | #[cfg (feature = "std" )] |
1483 | macro_rules! variant_identifier { |
1484 | ( |
1485 | $name_kind:ident ($($variant:ident; $bytes:expr; $index:expr),*) |
1486 | $expecting_message:expr, |
1487 | $variants_name:ident |
1488 | ) => { |
1489 | enum $name_kind { |
1490 | $($variant),* |
1491 | } |
1492 | |
1493 | static $variants_name: &[&str] = &[$(stringify!($variant)),*]; |
1494 | |
1495 | impl<'de> Deserialize<'de> for $name_kind { |
1496 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1497 | where |
1498 | D: Deserializer<'de>, |
1499 | { |
1500 | struct KindVisitor; |
1501 | |
1502 | impl<'de> Visitor<'de> for KindVisitor { |
1503 | type Value = $name_kind; |
1504 | |
1505 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1506 | formatter.write_str($expecting_message) |
1507 | } |
1508 | |
1509 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
1510 | where |
1511 | E: Error, |
1512 | { |
1513 | match value { |
1514 | $( |
1515 | $index => Ok($name_kind :: $variant), |
1516 | )* |
1517 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self),), |
1518 | } |
1519 | } |
1520 | |
1521 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
1522 | where |
1523 | E: Error, |
1524 | { |
1525 | match value { |
1526 | $( |
1527 | stringify!($variant) => Ok($name_kind :: $variant), |
1528 | )* |
1529 | _ => Err(Error::unknown_variant(value, $variants_name)), |
1530 | } |
1531 | } |
1532 | |
1533 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
1534 | where |
1535 | E: Error, |
1536 | { |
1537 | match value { |
1538 | $( |
1539 | $bytes => Ok($name_kind :: $variant), |
1540 | )* |
1541 | _ => { |
1542 | match str::from_utf8(value) { |
1543 | Ok(value) => Err(Error::unknown_variant(value, $variants_name)), |
1544 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(value), &self)), |
1545 | } |
1546 | } |
1547 | } |
1548 | } |
1549 | } |
1550 | |
1551 | deserializer.deserialize_identifier(KindVisitor) |
1552 | } |
1553 | } |
1554 | } |
1555 | } |
1556 | |
1557 | #[cfg (feature = "std" )] |
1558 | macro_rules! deserialize_enum { |
1559 | ( |
1560 | $name:ident $name_kind:ident ($($variant:ident; $bytes:expr; $index:expr),*) |
1561 | $expecting_message:expr, |
1562 | $deserializer:expr |
1563 | ) => { |
1564 | variant_identifier! { |
1565 | $name_kind ($($variant; $bytes; $index),*) |
1566 | $expecting_message, |
1567 | VARIANTS |
1568 | } |
1569 | |
1570 | struct EnumVisitor; |
1571 | impl<'de> Visitor<'de> for EnumVisitor { |
1572 | type Value = $name; |
1573 | |
1574 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1575 | formatter.write_str(concat!("a " , stringify!($name))) |
1576 | } |
1577 | |
1578 | |
1579 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
1580 | where |
1581 | A: EnumAccess<'de>, |
1582 | { |
1583 | match tri!(data.variant()) { |
1584 | $( |
1585 | ($name_kind :: $variant, v) => v.newtype_variant().map($name :: $variant), |
1586 | )* |
1587 | } |
1588 | } |
1589 | } |
1590 | $deserializer.deserialize_enum(stringify!($name), VARIANTS, EnumVisitor) |
1591 | } |
1592 | } |
1593 | |
1594 | #[cfg (feature = "std" )] |
1595 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1596 | impl<'de> Deserialize<'de> for net::IpAddr { |
1597 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1598 | where |
1599 | D: Deserializer<'de>, |
1600 | { |
1601 | if deserializer.is_human_readable() { |
1602 | deserializer.deserialize_str(FromStrVisitor::new("IP address" )) |
1603 | } else { |
1604 | use crate::lib::net::IpAddr; |
1605 | deserialize_enum! { |
1606 | IpAddr IpAddrKind (V4; b"V4" ; 0, V6; b"V6" ; 1) |
1607 | "`V4` or `V6`" , |
1608 | deserializer |
1609 | } |
1610 | } |
1611 | } |
1612 | } |
1613 | |
1614 | parse_ip_impl! { |
1615 | #[cfg (feature = "std" )] |
1616 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1617 | net::Ipv4Addr, "IPv4 address" , 4 |
1618 | } |
1619 | |
1620 | parse_ip_impl! { |
1621 | #[cfg (feature = "std" )] |
1622 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1623 | net::Ipv6Addr, "IPv6 address" , 16 |
1624 | } |
1625 | |
1626 | macro_rules! parse_socket_impl { |
1627 | ( |
1628 | $(#[$attr:meta])* |
1629 | $ty:ty, $expecting:tt, |
1630 | $new:expr, |
1631 | ) => { |
1632 | $(#[$attr])* |
1633 | impl<'de> Deserialize<'de> for $ty { |
1634 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1635 | where |
1636 | D: Deserializer<'de>, |
1637 | { |
1638 | if deserializer.is_human_readable() { |
1639 | deserializer.deserialize_str(FromStrVisitor::new($expecting)) |
1640 | } else { |
1641 | <(_, u16)>::deserialize(deserializer).map($new) |
1642 | } |
1643 | } |
1644 | } |
1645 | }; |
1646 | } |
1647 | |
1648 | #[cfg (feature = "std" )] |
1649 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1650 | impl<'de> Deserialize<'de> for net::SocketAddr { |
1651 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1652 | where |
1653 | D: Deserializer<'de>, |
1654 | { |
1655 | if deserializer.is_human_readable() { |
1656 | deserializer.deserialize_str(FromStrVisitor::new("socket address" )) |
1657 | } else { |
1658 | use crate::lib::net::SocketAddr; |
1659 | deserialize_enum! { |
1660 | SocketAddr SocketAddrKind (V4; b"V4" ; 0, V6; b"V6" ; 1) |
1661 | "`V4` or `V6`" , |
1662 | deserializer |
1663 | } |
1664 | } |
1665 | } |
1666 | } |
1667 | |
1668 | parse_socket_impl! { |
1669 | #[cfg (feature = "std" )] |
1670 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1671 | net::SocketAddrV4, "IPv4 socket address" , |
1672 | |(ip, port)| net::SocketAddrV4::new(ip, port), |
1673 | } |
1674 | |
1675 | parse_socket_impl! { |
1676 | #[cfg (feature = "std" )] |
1677 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1678 | net::SocketAddrV6, "IPv6 socket address" , |
1679 | |(ip, port)| net::SocketAddrV6::new(ip, port, 0, 0), |
1680 | } |
1681 | |
1682 | //////////////////////////////////////////////////////////////////////////////// |
1683 | |
1684 | #[cfg (feature = "std" )] |
1685 | struct PathVisitor; |
1686 | |
1687 | #[cfg (feature = "std" )] |
1688 | impl<'a> Visitor<'a> for PathVisitor { |
1689 | type Value = &'a Path; |
1690 | |
1691 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1692 | formatter.write_str("a borrowed path" ) |
1693 | } |
1694 | |
1695 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> |
1696 | where |
1697 | E: Error, |
1698 | { |
1699 | Ok(v.as_ref()) |
1700 | } |
1701 | |
1702 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> |
1703 | where |
1704 | E: Error, |
1705 | { |
1706 | str::from_utf8(v) |
1707 | .map(AsRef::as_ref) |
1708 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) |
1709 | } |
1710 | } |
1711 | |
1712 | #[cfg (feature = "std" )] |
1713 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1714 | impl<'de: 'a, 'a> Deserialize<'de> for &'a Path { |
1715 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1716 | where |
1717 | D: Deserializer<'de>, |
1718 | { |
1719 | deserializer.deserialize_str(PathVisitor) |
1720 | } |
1721 | } |
1722 | |
1723 | #[cfg (feature = "std" )] |
1724 | struct PathBufVisitor; |
1725 | |
1726 | #[cfg (feature = "std" )] |
1727 | impl<'de> Visitor<'de> for PathBufVisitor { |
1728 | type Value = PathBuf; |
1729 | |
1730 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1731 | formatter.write_str("path string" ) |
1732 | } |
1733 | |
1734 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
1735 | where |
1736 | E: Error, |
1737 | { |
1738 | Ok(From::from(v)) |
1739 | } |
1740 | |
1741 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
1742 | where |
1743 | E: Error, |
1744 | { |
1745 | Ok(From::from(v)) |
1746 | } |
1747 | |
1748 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
1749 | where |
1750 | E: Error, |
1751 | { |
1752 | str::from_utf8(v) |
1753 | .map(From::from) |
1754 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) |
1755 | } |
1756 | |
1757 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
1758 | where |
1759 | E: Error, |
1760 | { |
1761 | String::from_utf8(v) |
1762 | .map(From::from) |
1763 | .map_err(|e| Error::invalid_value(Unexpected::Bytes(&e.into_bytes()), &self)) |
1764 | } |
1765 | } |
1766 | |
1767 | #[cfg (feature = "std" )] |
1768 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1769 | impl<'de> Deserialize<'de> for PathBuf { |
1770 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1771 | where |
1772 | D: Deserializer<'de>, |
1773 | { |
1774 | deserializer.deserialize_string(PathBufVisitor) |
1775 | } |
1776 | } |
1777 | |
1778 | forwarded_impl! { |
1779 | #[cfg (feature = "std" )] |
1780 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
1781 | (), Box<Path>, PathBuf::into_boxed_path |
1782 | } |
1783 | |
1784 | //////////////////////////////////////////////////////////////////////////////// |
1785 | |
1786 | // If this were outside of the serde crate, it would just use: |
1787 | // |
1788 | // #[derive(Deserialize)] |
1789 | // #[serde(variant_identifier)] |
1790 | #[cfg (all(feature = "std" , any(unix, windows)))] |
1791 | variant_identifier! { |
1792 | OsStringKind (Unix; b"Unix" ; 0, Windows; b"Windows" ; 1) |
1793 | "`Unix` or `Windows`" , |
1794 | OSSTR_VARIANTS |
1795 | } |
1796 | |
1797 | #[cfg (all(feature = "std" , any(unix, windows)))] |
1798 | struct OsStringVisitor; |
1799 | |
1800 | #[cfg (all(feature = "std" , any(unix, windows)))] |
1801 | impl<'de> Visitor<'de> for OsStringVisitor { |
1802 | type Value = OsString; |
1803 | |
1804 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1805 | formatter.write_str("os string" ) |
1806 | } |
1807 | |
1808 | #[cfg (unix)] |
1809 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
1810 | where |
1811 | A: EnumAccess<'de>, |
1812 | { |
1813 | use std::os::unix::ffi::OsStringExt; |
1814 | |
1815 | match tri!(data.variant()) { |
1816 | (OsStringKind::Unix, v) => v.newtype_variant().map(OsString::from_vec), |
1817 | (OsStringKind::Windows, _) => Err(Error::custom( |
1818 | "cannot deserialize Windows OS string on Unix" , |
1819 | )), |
1820 | } |
1821 | } |
1822 | |
1823 | #[cfg (windows)] |
1824 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
1825 | where |
1826 | A: EnumAccess<'de>, |
1827 | { |
1828 | use std::os::windows::ffi::OsStringExt; |
1829 | |
1830 | match tri!(data.variant()) { |
1831 | (OsStringKind::Windows, v) => v |
1832 | .newtype_variant::<Vec<u16>>() |
1833 | .map(|vec| OsString::from_wide(&vec)), |
1834 | (OsStringKind::Unix, _) => Err(Error::custom( |
1835 | "cannot deserialize Unix OS string on Windows" , |
1836 | )), |
1837 | } |
1838 | } |
1839 | } |
1840 | |
1841 | #[cfg (all(feature = "std" , any(unix, windows)))] |
1842 | #[cfg_attr (doc_cfg, doc(cfg(all(feature = "std" , any(unix, windows)))))] |
1843 | impl<'de> Deserialize<'de> for OsString { |
1844 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1845 | where |
1846 | D: Deserializer<'de>, |
1847 | { |
1848 | deserializer.deserialize_enum("OsString" , OSSTR_VARIANTS, OsStringVisitor) |
1849 | } |
1850 | } |
1851 | |
1852 | //////////////////////////////////////////////////////////////////////////////// |
1853 | |
1854 | forwarded_impl! { |
1855 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1856 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1857 | (T), Box<T>, Box::new |
1858 | } |
1859 | |
1860 | forwarded_impl! { |
1861 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1862 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1863 | (T), Box<[T]>, Vec::into_boxed_slice |
1864 | } |
1865 | |
1866 | forwarded_impl! { |
1867 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1868 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1869 | (), Box<str>, String::into_boxed_str |
1870 | } |
1871 | |
1872 | forwarded_impl! { |
1873 | #[cfg (all(feature = "std" , any(unix, windows)))] |
1874 | #[cfg_attr (doc_cfg, doc(cfg(all(feature = "std" , any(unix, windows)))))] |
1875 | (), Box<OsStr>, OsString::into_boxed_os_str |
1876 | } |
1877 | |
1878 | #[cfg (any(feature = "std" , feature = "alloc" ))] |
1879 | #[cfg_attr (doc_cfg, doc(cfg(any(feature = "std" , feature = "alloc" ))))] |
1880 | impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T> |
1881 | where |
1882 | T: ToOwned, |
1883 | T::Owned: Deserialize<'de>, |
1884 | { |
1885 | #[inline ] |
1886 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1887 | where |
1888 | D: Deserializer<'de>, |
1889 | { |
1890 | T::Owned::deserialize(deserializer).map(Cow::Owned) |
1891 | } |
1892 | } |
1893 | |
1894 | //////////////////////////////////////////////////////////////////////////////// |
1895 | |
1896 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting |
1897 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. |
1898 | /// |
1899 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc |
1900 | #[cfg (all(feature = "rc" , any(feature = "std" , feature = "alloc" )))] |
1901 | #[cfg_attr ( |
1902 | doc_cfg, |
1903 | doc(cfg(all(feature = "rc" , any(feature = "std" , feature = "alloc" )))) |
1904 | )] |
1905 | impl<'de, T: ?Sized> Deserialize<'de> for RcWeak<T> |
1906 | where |
1907 | T: Deserialize<'de>, |
1908 | { |
1909 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1910 | where |
1911 | D: Deserializer<'de>, |
1912 | { |
1913 | tri!(Option::<T>::deserialize(deserializer)); |
1914 | Ok(RcWeak::new()) |
1915 | } |
1916 | } |
1917 | |
1918 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting |
1919 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. |
1920 | /// |
1921 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc |
1922 | #[cfg (all(feature = "rc" , any(feature = "std" , feature = "alloc" )))] |
1923 | #[cfg_attr ( |
1924 | doc_cfg, |
1925 | doc(cfg(all(feature = "rc" , any(feature = "std" , feature = "alloc" )))) |
1926 | )] |
1927 | impl<'de, T: ?Sized> Deserialize<'de> for ArcWeak<T> |
1928 | where |
1929 | T: Deserialize<'de>, |
1930 | { |
1931 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1932 | where |
1933 | D: Deserializer<'de>, |
1934 | { |
1935 | tri!(Option::<T>::deserialize(deserializer)); |
1936 | Ok(ArcWeak::new()) |
1937 | } |
1938 | } |
1939 | |
1940 | //////////////////////////////////////////////////////////////////////////////// |
1941 | |
1942 | macro_rules! box_forwarded_impl { |
1943 | ( |
1944 | $(#[$attr:meta])* |
1945 | $t:ident |
1946 | ) => { |
1947 | $(#[$attr])* |
1948 | impl<'de, T: ?Sized> Deserialize<'de> for $t<T> |
1949 | where |
1950 | Box<T>: Deserialize<'de>, |
1951 | { |
1952 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1953 | where |
1954 | D: Deserializer<'de>, |
1955 | { |
1956 | Box::deserialize(deserializer).map(Into::into) |
1957 | } |
1958 | } |
1959 | }; |
1960 | } |
1961 | |
1962 | box_forwarded_impl! { |
1963 | /// This impl requires the [`"rc"`] Cargo feature of Serde. |
1964 | /// |
1965 | /// Deserializing a data structure containing `Rc` will not attempt to |
1966 | /// deduplicate `Rc` references to the same data. Every deserialized `Rc` |
1967 | /// will end up with a strong count of 1. |
1968 | /// |
1969 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc |
1970 | #[cfg (all(feature = "rc" , any(feature = "std" , feature = "alloc" )))] |
1971 | #[cfg_attr (doc_cfg, doc(cfg(all(feature = "rc" , any(feature = "std" , feature = "alloc" )))))] |
1972 | Rc |
1973 | } |
1974 | |
1975 | box_forwarded_impl! { |
1976 | /// This impl requires the [`"rc"`] Cargo feature of Serde. |
1977 | /// |
1978 | /// Deserializing a data structure containing `Arc` will not attempt to |
1979 | /// deduplicate `Arc` references to the same data. Every deserialized `Arc` |
1980 | /// will end up with a strong count of 1. |
1981 | /// |
1982 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc |
1983 | #[cfg (all(feature = "rc" , any(feature = "std" , feature = "alloc" )))] |
1984 | #[cfg_attr (doc_cfg, doc(cfg(all(feature = "rc" , any(feature = "std" , feature = "alloc" )))))] |
1985 | Arc |
1986 | } |
1987 | |
1988 | //////////////////////////////////////////////////////////////////////////////// |
1989 | |
1990 | impl<'de, T> Deserialize<'de> for Cell<T> |
1991 | where |
1992 | T: Deserialize<'de> + Copy, |
1993 | { |
1994 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
1995 | where |
1996 | D: Deserializer<'de>, |
1997 | { |
1998 | T::deserialize(deserializer).map(Cell::new) |
1999 | } |
2000 | } |
2001 | |
2002 | forwarded_impl! { |
2003 | (T), RefCell<T>, RefCell::new |
2004 | } |
2005 | |
2006 | forwarded_impl! { |
2007 | #[cfg (feature = "std" )] |
2008 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
2009 | (T), Mutex<T>, Mutex::new |
2010 | } |
2011 | |
2012 | forwarded_impl! { |
2013 | #[cfg (feature = "std" )] |
2014 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
2015 | (T), RwLock<T>, RwLock::new |
2016 | } |
2017 | |
2018 | //////////////////////////////////////////////////////////////////////////////// |
2019 | |
2020 | // This is a cleaned-up version of the impl generated by: |
2021 | // |
2022 | // #[derive(Deserialize)] |
2023 | // #[serde(deny_unknown_fields)] |
2024 | // struct Duration { |
2025 | // secs: u64, |
2026 | // nanos: u32, |
2027 | // } |
2028 | impl<'de> Deserialize<'de> for Duration { |
2029 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2030 | where |
2031 | D: Deserializer<'de>, |
2032 | { |
2033 | // If this were outside of the serde crate, it would just use: |
2034 | // |
2035 | // #[derive(Deserialize)] |
2036 | // #[serde(field_identifier, rename_all = "lowercase")] |
2037 | enum Field { |
2038 | Secs, |
2039 | Nanos, |
2040 | } |
2041 | |
2042 | impl<'de> Deserialize<'de> for Field { |
2043 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2044 | where |
2045 | D: Deserializer<'de>, |
2046 | { |
2047 | struct FieldVisitor; |
2048 | |
2049 | impl<'de> Visitor<'de> for FieldVisitor { |
2050 | type Value = Field; |
2051 | |
2052 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2053 | formatter.write_str("`secs` or `nanos`" ) |
2054 | } |
2055 | |
2056 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2057 | where |
2058 | E: Error, |
2059 | { |
2060 | match value { |
2061 | "secs" => Ok(Field::Secs), |
2062 | "nanos" => Ok(Field::Nanos), |
2063 | _ => Err(Error::unknown_field(value, FIELDS)), |
2064 | } |
2065 | } |
2066 | |
2067 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2068 | where |
2069 | E: Error, |
2070 | { |
2071 | match value { |
2072 | b"secs" => Ok(Field::Secs), |
2073 | b"nanos" => Ok(Field::Nanos), |
2074 | _ => { |
2075 | let value = crate::__private::from_utf8_lossy(value); |
2076 | Err(Error::unknown_field(&*value, FIELDS)) |
2077 | } |
2078 | } |
2079 | } |
2080 | } |
2081 | |
2082 | deserializer.deserialize_identifier(FieldVisitor) |
2083 | } |
2084 | } |
2085 | |
2086 | fn check_overflow<E>(secs: u64, nanos: u32) -> Result<(), E> |
2087 | where |
2088 | E: Error, |
2089 | { |
2090 | static NANOS_PER_SEC: u32 = 1_000_000_000; |
2091 | match secs.checked_add((nanos / NANOS_PER_SEC) as u64) { |
2092 | Some(_) => Ok(()), |
2093 | None => Err(E::custom("overflow deserializing Duration" )), |
2094 | } |
2095 | } |
2096 | |
2097 | struct DurationVisitor; |
2098 | |
2099 | impl<'de> Visitor<'de> for DurationVisitor { |
2100 | type Value = Duration; |
2101 | |
2102 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2103 | formatter.write_str("struct Duration" ) |
2104 | } |
2105 | |
2106 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
2107 | where |
2108 | A: SeqAccess<'de>, |
2109 | { |
2110 | let secs: u64 = match tri!(seq.next_element()) { |
2111 | Some(value) => value, |
2112 | None => { |
2113 | return Err(Error::invalid_length(0, &self)); |
2114 | } |
2115 | }; |
2116 | let nanos: u32 = match tri!(seq.next_element()) { |
2117 | Some(value) => value, |
2118 | None => { |
2119 | return Err(Error::invalid_length(1, &self)); |
2120 | } |
2121 | }; |
2122 | tri!(check_overflow(secs, nanos)); |
2123 | Ok(Duration::new(secs, nanos)) |
2124 | } |
2125 | |
2126 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2127 | where |
2128 | A: MapAccess<'de>, |
2129 | { |
2130 | let mut secs: Option<u64> = None; |
2131 | let mut nanos: Option<u32> = None; |
2132 | while let Some(key) = tri!(map.next_key()) { |
2133 | match key { |
2134 | Field::Secs => { |
2135 | if secs.is_some() { |
2136 | return Err(<A::Error as Error>::duplicate_field("secs" )); |
2137 | } |
2138 | secs = Some(tri!(map.next_value())); |
2139 | } |
2140 | Field::Nanos => { |
2141 | if nanos.is_some() { |
2142 | return Err(<A::Error as Error>::duplicate_field("nanos" )); |
2143 | } |
2144 | nanos = Some(tri!(map.next_value())); |
2145 | } |
2146 | } |
2147 | } |
2148 | let secs = match secs { |
2149 | Some(secs) => secs, |
2150 | None => return Err(<A::Error as Error>::missing_field("secs" )), |
2151 | }; |
2152 | let nanos = match nanos { |
2153 | Some(nanos) => nanos, |
2154 | None => return Err(<A::Error as Error>::missing_field("nanos" )), |
2155 | }; |
2156 | tri!(check_overflow(secs, nanos)); |
2157 | Ok(Duration::new(secs, nanos)) |
2158 | } |
2159 | } |
2160 | |
2161 | const FIELDS: &[&str] = &["secs" , "nanos" ]; |
2162 | deserializer.deserialize_struct("Duration" , FIELDS, DurationVisitor) |
2163 | } |
2164 | } |
2165 | |
2166 | //////////////////////////////////////////////////////////////////////////////// |
2167 | |
2168 | #[cfg (feature = "std" )] |
2169 | #[cfg_attr (doc_cfg, doc(cfg(feature = "std" )))] |
2170 | impl<'de> Deserialize<'de> for SystemTime { |
2171 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2172 | where |
2173 | D: Deserializer<'de>, |
2174 | { |
2175 | // Reuse duration |
2176 | enum Field { |
2177 | Secs, |
2178 | Nanos, |
2179 | } |
2180 | |
2181 | impl<'de> Deserialize<'de> for Field { |
2182 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2183 | where |
2184 | D: Deserializer<'de>, |
2185 | { |
2186 | struct FieldVisitor; |
2187 | |
2188 | impl<'de> Visitor<'de> for FieldVisitor { |
2189 | type Value = Field; |
2190 | |
2191 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2192 | formatter.write_str("`secs_since_epoch` or `nanos_since_epoch`" ) |
2193 | } |
2194 | |
2195 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2196 | where |
2197 | E: Error, |
2198 | { |
2199 | match value { |
2200 | "secs_since_epoch" => Ok(Field::Secs), |
2201 | "nanos_since_epoch" => Ok(Field::Nanos), |
2202 | _ => Err(Error::unknown_field(value, FIELDS)), |
2203 | } |
2204 | } |
2205 | |
2206 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2207 | where |
2208 | E: Error, |
2209 | { |
2210 | match value { |
2211 | b"secs_since_epoch" => Ok(Field::Secs), |
2212 | b"nanos_since_epoch" => Ok(Field::Nanos), |
2213 | _ => { |
2214 | let value = String::from_utf8_lossy(value); |
2215 | Err(Error::unknown_field(&value, FIELDS)) |
2216 | } |
2217 | } |
2218 | } |
2219 | } |
2220 | |
2221 | deserializer.deserialize_identifier(FieldVisitor) |
2222 | } |
2223 | } |
2224 | |
2225 | fn check_overflow<E>(secs: u64, nanos: u32) -> Result<(), E> |
2226 | where |
2227 | E: Error, |
2228 | { |
2229 | static NANOS_PER_SEC: u32 = 1_000_000_000; |
2230 | match secs.checked_add((nanos / NANOS_PER_SEC) as u64) { |
2231 | Some(_) => Ok(()), |
2232 | None => Err(E::custom("overflow deserializing SystemTime epoch offset" )), |
2233 | } |
2234 | } |
2235 | |
2236 | struct DurationVisitor; |
2237 | |
2238 | impl<'de> Visitor<'de> for DurationVisitor { |
2239 | type Value = Duration; |
2240 | |
2241 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2242 | formatter.write_str("struct SystemTime" ) |
2243 | } |
2244 | |
2245 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
2246 | where |
2247 | A: SeqAccess<'de>, |
2248 | { |
2249 | let secs: u64 = match tri!(seq.next_element()) { |
2250 | Some(value) => value, |
2251 | None => { |
2252 | return Err(Error::invalid_length(0, &self)); |
2253 | } |
2254 | }; |
2255 | let nanos: u32 = match tri!(seq.next_element()) { |
2256 | Some(value) => value, |
2257 | None => { |
2258 | return Err(Error::invalid_length(1, &self)); |
2259 | } |
2260 | }; |
2261 | tri!(check_overflow(secs, nanos)); |
2262 | Ok(Duration::new(secs, nanos)) |
2263 | } |
2264 | |
2265 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2266 | where |
2267 | A: MapAccess<'de>, |
2268 | { |
2269 | let mut secs: Option<u64> = None; |
2270 | let mut nanos: Option<u32> = None; |
2271 | while let Some(key) = tri!(map.next_key()) { |
2272 | match key { |
2273 | Field::Secs => { |
2274 | if secs.is_some() { |
2275 | return Err(<A::Error as Error>::duplicate_field( |
2276 | "secs_since_epoch" , |
2277 | )); |
2278 | } |
2279 | secs = Some(tri!(map.next_value())); |
2280 | } |
2281 | Field::Nanos => { |
2282 | if nanos.is_some() { |
2283 | return Err(<A::Error as Error>::duplicate_field( |
2284 | "nanos_since_epoch" , |
2285 | )); |
2286 | } |
2287 | nanos = Some(tri!(map.next_value())); |
2288 | } |
2289 | } |
2290 | } |
2291 | let secs = match secs { |
2292 | Some(secs) => secs, |
2293 | None => return Err(<A::Error as Error>::missing_field("secs_since_epoch" )), |
2294 | }; |
2295 | let nanos = match nanos { |
2296 | Some(nanos) => nanos, |
2297 | None => return Err(<A::Error as Error>::missing_field("nanos_since_epoch" )), |
2298 | }; |
2299 | tri!(check_overflow(secs, nanos)); |
2300 | Ok(Duration::new(secs, nanos)) |
2301 | } |
2302 | } |
2303 | |
2304 | const FIELDS: &[&str] = &["secs_since_epoch" , "nanos_since_epoch" ]; |
2305 | let duration = tri!(deserializer.deserialize_struct("SystemTime" , FIELDS, DurationVisitor)); |
2306 | #[cfg (not(no_systemtime_checked_add))] |
2307 | let ret = UNIX_EPOCH |
2308 | .checked_add(duration) |
2309 | .ok_or_else(|| D::Error::custom("overflow deserializing SystemTime" )); |
2310 | #[cfg (no_systemtime_checked_add)] |
2311 | let ret = Ok(UNIX_EPOCH + duration); |
2312 | ret |
2313 | } |
2314 | } |
2315 | |
2316 | //////////////////////////////////////////////////////////////////////////////// |
2317 | |
2318 | // Similar to: |
2319 | // |
2320 | // #[derive(Deserialize)] |
2321 | // #[serde(deny_unknown_fields)] |
2322 | // struct Range<Idx> { |
2323 | // start: Idx, |
2324 | // end: Idx, |
2325 | // } |
2326 | impl<'de, Idx> Deserialize<'de> for Range<Idx> |
2327 | where |
2328 | Idx: Deserialize<'de>, |
2329 | { |
2330 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2331 | where |
2332 | D: Deserializer<'de>, |
2333 | { |
2334 | let (start, end) = tri!(deserializer.deserialize_struct( |
2335 | "Range" , |
2336 | range::FIELDS, |
2337 | range::RangeVisitor { |
2338 | expecting: "struct Range" , |
2339 | phantom: PhantomData, |
2340 | }, |
2341 | )); |
2342 | Ok(start..end) |
2343 | } |
2344 | } |
2345 | |
2346 | impl<'de, Idx> Deserialize<'de> for RangeInclusive<Idx> |
2347 | where |
2348 | Idx: Deserialize<'de>, |
2349 | { |
2350 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2351 | where |
2352 | D: Deserializer<'de>, |
2353 | { |
2354 | let (start, end) = tri!(deserializer.deserialize_struct( |
2355 | "RangeInclusive" , |
2356 | range::FIELDS, |
2357 | range::RangeVisitor { |
2358 | expecting: "struct RangeInclusive" , |
2359 | phantom: PhantomData, |
2360 | }, |
2361 | )); |
2362 | Ok(RangeInclusive::new(start, end)) |
2363 | } |
2364 | } |
2365 | |
2366 | mod range { |
2367 | use crate::lib::*; |
2368 | |
2369 | use crate::de::{Deserialize, Deserializer, Error, MapAccess, SeqAccess, Visitor}; |
2370 | |
2371 | pub const FIELDS: &[&str] = &["start" , "end" ]; |
2372 | |
2373 | // If this were outside of the serde crate, it would just use: |
2374 | // |
2375 | // #[derive(Deserialize)] |
2376 | // #[serde(field_identifier, rename_all = "lowercase")] |
2377 | enum Field { |
2378 | Start, |
2379 | End, |
2380 | } |
2381 | |
2382 | impl<'de> Deserialize<'de> for Field { |
2383 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2384 | where |
2385 | D: Deserializer<'de>, |
2386 | { |
2387 | struct FieldVisitor; |
2388 | |
2389 | impl<'de> Visitor<'de> for FieldVisitor { |
2390 | type Value = Field; |
2391 | |
2392 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2393 | formatter.write_str("`start` or `end`" ) |
2394 | } |
2395 | |
2396 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2397 | where |
2398 | E: Error, |
2399 | { |
2400 | match value { |
2401 | "start" => Ok(Field::Start), |
2402 | "end" => Ok(Field::End), |
2403 | _ => Err(Error::unknown_field(value, FIELDS)), |
2404 | } |
2405 | } |
2406 | |
2407 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2408 | where |
2409 | E: Error, |
2410 | { |
2411 | match value { |
2412 | b"start" => Ok(Field::Start), |
2413 | b"end" => Ok(Field::End), |
2414 | _ => { |
2415 | let value = crate::__private::from_utf8_lossy(value); |
2416 | Err(Error::unknown_field(&*value, FIELDS)) |
2417 | } |
2418 | } |
2419 | } |
2420 | } |
2421 | |
2422 | deserializer.deserialize_identifier(FieldVisitor) |
2423 | } |
2424 | } |
2425 | |
2426 | pub struct RangeVisitor<Idx> { |
2427 | pub expecting: &'static str, |
2428 | pub phantom: PhantomData<Idx>, |
2429 | } |
2430 | |
2431 | impl<'de, Idx> Visitor<'de> for RangeVisitor<Idx> |
2432 | where |
2433 | Idx: Deserialize<'de>, |
2434 | { |
2435 | type Value = (Idx, Idx); |
2436 | |
2437 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2438 | formatter.write_str(self.expecting) |
2439 | } |
2440 | |
2441 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
2442 | where |
2443 | A: SeqAccess<'de>, |
2444 | { |
2445 | let start: Idx = match tri!(seq.next_element()) { |
2446 | Some(value) => value, |
2447 | None => { |
2448 | return Err(Error::invalid_length(0, &self)); |
2449 | } |
2450 | }; |
2451 | let end: Idx = match tri!(seq.next_element()) { |
2452 | Some(value) => value, |
2453 | None => { |
2454 | return Err(Error::invalid_length(1, &self)); |
2455 | } |
2456 | }; |
2457 | Ok((start, end)) |
2458 | } |
2459 | |
2460 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2461 | where |
2462 | A: MapAccess<'de>, |
2463 | { |
2464 | let mut start: Option<Idx> = None; |
2465 | let mut end: Option<Idx> = None; |
2466 | while let Some(key) = tri!(map.next_key()) { |
2467 | match key { |
2468 | Field::Start => { |
2469 | if start.is_some() { |
2470 | return Err(<A::Error as Error>::duplicate_field("start" )); |
2471 | } |
2472 | start = Some(tri!(map.next_value())); |
2473 | } |
2474 | Field::End => { |
2475 | if end.is_some() { |
2476 | return Err(<A::Error as Error>::duplicate_field("end" )); |
2477 | } |
2478 | end = Some(tri!(map.next_value())); |
2479 | } |
2480 | } |
2481 | } |
2482 | let start = match start { |
2483 | Some(start) => start, |
2484 | None => return Err(<A::Error as Error>::missing_field("start" )), |
2485 | }; |
2486 | let end = match end { |
2487 | Some(end) => end, |
2488 | None => return Err(<A::Error as Error>::missing_field("end" )), |
2489 | }; |
2490 | Ok((start, end)) |
2491 | } |
2492 | } |
2493 | } |
2494 | |
2495 | //////////////////////////////////////////////////////////////////////////////// |
2496 | |
2497 | // Similar to: |
2498 | // |
2499 | // #[derive(Deserialize)] |
2500 | // #[serde(deny_unknown_fields)] |
2501 | // struct RangeFrom<Idx> { |
2502 | // start: Idx, |
2503 | // } |
2504 | impl<'de, Idx> Deserialize<'de> for RangeFrom<Idx> |
2505 | where |
2506 | Idx: Deserialize<'de>, |
2507 | { |
2508 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2509 | where |
2510 | D: Deserializer<'de>, |
2511 | { |
2512 | let start = tri!(deserializer.deserialize_struct( |
2513 | "RangeFrom" , |
2514 | range_from::FIELDS, |
2515 | range_from::RangeFromVisitor { |
2516 | expecting: "struct RangeFrom" , |
2517 | phantom: PhantomData, |
2518 | }, |
2519 | )); |
2520 | Ok(start..) |
2521 | } |
2522 | } |
2523 | |
2524 | mod range_from { |
2525 | use crate::lib::*; |
2526 | |
2527 | use crate::de::{Deserialize, Deserializer, Error, MapAccess, SeqAccess, Visitor}; |
2528 | |
2529 | pub const FIELDS: &[&str] = &["start" ]; |
2530 | |
2531 | // If this were outside of the serde crate, it would just use: |
2532 | // |
2533 | // #[derive(Deserialize)] |
2534 | // #[serde(field_identifier, rename_all = "lowercase")] |
2535 | enum Field { |
2536 | Start, |
2537 | } |
2538 | |
2539 | impl<'de> Deserialize<'de> for Field { |
2540 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2541 | where |
2542 | D: Deserializer<'de>, |
2543 | { |
2544 | struct FieldVisitor; |
2545 | |
2546 | impl<'de> Visitor<'de> for FieldVisitor { |
2547 | type Value = Field; |
2548 | |
2549 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2550 | formatter.write_str("`start`" ) |
2551 | } |
2552 | |
2553 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2554 | where |
2555 | E: Error, |
2556 | { |
2557 | match value { |
2558 | "start" => Ok(Field::Start), |
2559 | _ => Err(Error::unknown_field(value, FIELDS)), |
2560 | } |
2561 | } |
2562 | |
2563 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2564 | where |
2565 | E: Error, |
2566 | { |
2567 | match value { |
2568 | b"start" => Ok(Field::Start), |
2569 | _ => { |
2570 | let value = crate::__private::from_utf8_lossy(value); |
2571 | Err(Error::unknown_field(&*value, FIELDS)) |
2572 | } |
2573 | } |
2574 | } |
2575 | } |
2576 | |
2577 | deserializer.deserialize_identifier(FieldVisitor) |
2578 | } |
2579 | } |
2580 | |
2581 | pub struct RangeFromVisitor<Idx> { |
2582 | pub expecting: &'static str, |
2583 | pub phantom: PhantomData<Idx>, |
2584 | } |
2585 | |
2586 | impl<'de, Idx> Visitor<'de> for RangeFromVisitor<Idx> |
2587 | where |
2588 | Idx: Deserialize<'de>, |
2589 | { |
2590 | type Value = Idx; |
2591 | |
2592 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2593 | formatter.write_str(self.expecting) |
2594 | } |
2595 | |
2596 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
2597 | where |
2598 | A: SeqAccess<'de>, |
2599 | { |
2600 | let start: Idx = match tri!(seq.next_element()) { |
2601 | Some(value) => value, |
2602 | None => { |
2603 | return Err(Error::invalid_length(0, &self)); |
2604 | } |
2605 | }; |
2606 | Ok(start) |
2607 | } |
2608 | |
2609 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2610 | where |
2611 | A: MapAccess<'de>, |
2612 | { |
2613 | let mut start: Option<Idx> = None; |
2614 | while let Some(key) = tri!(map.next_key()) { |
2615 | match key { |
2616 | Field::Start => { |
2617 | if start.is_some() { |
2618 | return Err(<A::Error as Error>::duplicate_field("start" )); |
2619 | } |
2620 | start = Some(tri!(map.next_value())); |
2621 | } |
2622 | } |
2623 | } |
2624 | let start = match start { |
2625 | Some(start) => start, |
2626 | None => return Err(<A::Error as Error>::missing_field("start" )), |
2627 | }; |
2628 | Ok(start) |
2629 | } |
2630 | } |
2631 | } |
2632 | |
2633 | //////////////////////////////////////////////////////////////////////////////// |
2634 | |
2635 | // Similar to: |
2636 | // |
2637 | // #[derive(Deserialize)] |
2638 | // #[serde(deny_unknown_fields)] |
2639 | // struct RangeTo<Idx> { |
2640 | // end: Idx, |
2641 | // } |
2642 | impl<'de, Idx> Deserialize<'de> for RangeTo<Idx> |
2643 | where |
2644 | Idx: Deserialize<'de>, |
2645 | { |
2646 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2647 | where |
2648 | D: Deserializer<'de>, |
2649 | { |
2650 | let end = tri!(deserializer.deserialize_struct( |
2651 | "RangeTo" , |
2652 | range_to::FIELDS, |
2653 | range_to::RangeToVisitor { |
2654 | expecting: "struct RangeTo" , |
2655 | phantom: PhantomData, |
2656 | }, |
2657 | )); |
2658 | Ok(..end) |
2659 | } |
2660 | } |
2661 | |
2662 | mod range_to { |
2663 | use crate::lib::*; |
2664 | |
2665 | use crate::de::{Deserialize, Deserializer, Error, MapAccess, SeqAccess, Visitor}; |
2666 | |
2667 | pub const FIELDS: &[&str] = &["end" ]; |
2668 | |
2669 | // If this were outside of the serde crate, it would just use: |
2670 | // |
2671 | // #[derive(Deserialize)] |
2672 | // #[serde(field_identifier, rename_all = "lowercase")] |
2673 | enum Field { |
2674 | End, |
2675 | } |
2676 | |
2677 | impl<'de> Deserialize<'de> for Field { |
2678 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2679 | where |
2680 | D: Deserializer<'de>, |
2681 | { |
2682 | struct FieldVisitor; |
2683 | |
2684 | impl<'de> Visitor<'de> for FieldVisitor { |
2685 | type Value = Field; |
2686 | |
2687 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2688 | formatter.write_str("`end`" ) |
2689 | } |
2690 | |
2691 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2692 | where |
2693 | E: Error, |
2694 | { |
2695 | match value { |
2696 | "end" => Ok(Field::End), |
2697 | _ => Err(Error::unknown_field(value, FIELDS)), |
2698 | } |
2699 | } |
2700 | |
2701 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2702 | where |
2703 | E: Error, |
2704 | { |
2705 | match value { |
2706 | b"end" => Ok(Field::End), |
2707 | _ => { |
2708 | let value = crate::__private::from_utf8_lossy(value); |
2709 | Err(Error::unknown_field(&*value, FIELDS)) |
2710 | } |
2711 | } |
2712 | } |
2713 | } |
2714 | |
2715 | deserializer.deserialize_identifier(FieldVisitor) |
2716 | } |
2717 | } |
2718 | |
2719 | pub struct RangeToVisitor<Idx> { |
2720 | pub expecting: &'static str, |
2721 | pub phantom: PhantomData<Idx>, |
2722 | } |
2723 | |
2724 | impl<'de, Idx> Visitor<'de> for RangeToVisitor<Idx> |
2725 | where |
2726 | Idx: Deserialize<'de>, |
2727 | { |
2728 | type Value = Idx; |
2729 | |
2730 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2731 | formatter.write_str(self.expecting) |
2732 | } |
2733 | |
2734 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
2735 | where |
2736 | A: SeqAccess<'de>, |
2737 | { |
2738 | let end: Idx = match tri!(seq.next_element()) { |
2739 | Some(value) => value, |
2740 | None => { |
2741 | return Err(Error::invalid_length(0, &self)); |
2742 | } |
2743 | }; |
2744 | Ok(end) |
2745 | } |
2746 | |
2747 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2748 | where |
2749 | A: MapAccess<'de>, |
2750 | { |
2751 | let mut end: Option<Idx> = None; |
2752 | while let Some(key) = tri!(map.next_key()) { |
2753 | match key { |
2754 | Field::End => { |
2755 | if end.is_some() { |
2756 | return Err(<A::Error as Error>::duplicate_field("end" )); |
2757 | } |
2758 | end = Some(tri!(map.next_value())); |
2759 | } |
2760 | } |
2761 | } |
2762 | let end = match end { |
2763 | Some(end) => end, |
2764 | None => return Err(<A::Error as Error>::missing_field("end" )), |
2765 | }; |
2766 | Ok(end) |
2767 | } |
2768 | } |
2769 | } |
2770 | |
2771 | //////////////////////////////////////////////////////////////////////////////// |
2772 | |
2773 | impl<'de, T> Deserialize<'de> for Bound<T> |
2774 | where |
2775 | T: Deserialize<'de>, |
2776 | { |
2777 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2778 | where |
2779 | D: Deserializer<'de>, |
2780 | { |
2781 | enum Field { |
2782 | Unbounded, |
2783 | Included, |
2784 | Excluded, |
2785 | } |
2786 | |
2787 | impl<'de> Deserialize<'de> for Field { |
2788 | #[inline ] |
2789 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2790 | where |
2791 | D: Deserializer<'de>, |
2792 | { |
2793 | struct FieldVisitor; |
2794 | |
2795 | impl<'de> Visitor<'de> for FieldVisitor { |
2796 | type Value = Field; |
2797 | |
2798 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2799 | formatter.write_str("`Unbounded`, `Included` or `Excluded`" ) |
2800 | } |
2801 | |
2802 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
2803 | where |
2804 | E: Error, |
2805 | { |
2806 | match value { |
2807 | 0 => Ok(Field::Unbounded), |
2808 | 1 => Ok(Field::Included), |
2809 | 2 => Ok(Field::Excluded), |
2810 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self)), |
2811 | } |
2812 | } |
2813 | |
2814 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2815 | where |
2816 | E: Error, |
2817 | { |
2818 | match value { |
2819 | "Unbounded" => Ok(Field::Unbounded), |
2820 | "Included" => Ok(Field::Included), |
2821 | "Excluded" => Ok(Field::Excluded), |
2822 | _ => Err(Error::unknown_variant(value, VARIANTS)), |
2823 | } |
2824 | } |
2825 | |
2826 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2827 | where |
2828 | E: Error, |
2829 | { |
2830 | match value { |
2831 | b"Unbounded" => Ok(Field::Unbounded), |
2832 | b"Included" => Ok(Field::Included), |
2833 | b"Excluded" => Ok(Field::Excluded), |
2834 | _ => match str::from_utf8(value) { |
2835 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), |
2836 | Err(_) => { |
2837 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) |
2838 | } |
2839 | }, |
2840 | } |
2841 | } |
2842 | } |
2843 | |
2844 | deserializer.deserialize_identifier(FieldVisitor) |
2845 | } |
2846 | } |
2847 | |
2848 | struct BoundVisitor<T>(PhantomData<Bound<T>>); |
2849 | |
2850 | impl<'de, T> Visitor<'de> for BoundVisitor<T> |
2851 | where |
2852 | T: Deserialize<'de>, |
2853 | { |
2854 | type Value = Bound<T>; |
2855 | |
2856 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2857 | formatter.write_str("enum Bound" ) |
2858 | } |
2859 | |
2860 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
2861 | where |
2862 | A: EnumAccess<'de>, |
2863 | { |
2864 | match tri!(data.variant()) { |
2865 | (Field::Unbounded, v) => v.unit_variant().map(|()| Bound::Unbounded), |
2866 | (Field::Included, v) => v.newtype_variant().map(Bound::Included), |
2867 | (Field::Excluded, v) => v.newtype_variant().map(Bound::Excluded), |
2868 | } |
2869 | } |
2870 | } |
2871 | |
2872 | const VARIANTS: &[&str] = &["Unbounded" , "Included" , "Excluded" ]; |
2873 | |
2874 | deserializer.deserialize_enum("Bound" , VARIANTS, BoundVisitor(PhantomData)) |
2875 | } |
2876 | } |
2877 | |
2878 | //////////////////////////////////////////////////////////////////////////////// |
2879 | |
2880 | impl<'de, T, E> Deserialize<'de> for Result<T, E> |
2881 | where |
2882 | T: Deserialize<'de>, |
2883 | E: Deserialize<'de>, |
2884 | { |
2885 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2886 | where |
2887 | D: Deserializer<'de>, |
2888 | { |
2889 | // If this were outside of the serde crate, it would just use: |
2890 | // |
2891 | // #[derive(Deserialize)] |
2892 | // #[serde(variant_identifier)] |
2893 | enum Field { |
2894 | Ok, |
2895 | Err, |
2896 | } |
2897 | |
2898 | impl<'de> Deserialize<'de> for Field { |
2899 | #[inline ] |
2900 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2901 | where |
2902 | D: Deserializer<'de>, |
2903 | { |
2904 | struct FieldVisitor; |
2905 | |
2906 | impl<'de> Visitor<'de> for FieldVisitor { |
2907 | type Value = Field; |
2908 | |
2909 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2910 | formatter.write_str("`Ok` or `Err`" ) |
2911 | } |
2912 | |
2913 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
2914 | where |
2915 | E: Error, |
2916 | { |
2917 | match value { |
2918 | 0 => Ok(Field::Ok), |
2919 | 1 => Ok(Field::Err), |
2920 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self)), |
2921 | } |
2922 | } |
2923 | |
2924 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
2925 | where |
2926 | E: Error, |
2927 | { |
2928 | match value { |
2929 | "Ok" => Ok(Field::Ok), |
2930 | "Err" => Ok(Field::Err), |
2931 | _ => Err(Error::unknown_variant(value, VARIANTS)), |
2932 | } |
2933 | } |
2934 | |
2935 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2936 | where |
2937 | E: Error, |
2938 | { |
2939 | match value { |
2940 | b"Ok" => Ok(Field::Ok), |
2941 | b"Err" => Ok(Field::Err), |
2942 | _ => match str::from_utf8(value) { |
2943 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), |
2944 | Err(_) => { |
2945 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) |
2946 | } |
2947 | }, |
2948 | } |
2949 | } |
2950 | } |
2951 | |
2952 | deserializer.deserialize_identifier(FieldVisitor) |
2953 | } |
2954 | } |
2955 | |
2956 | struct ResultVisitor<T, E>(PhantomData<Result<T, E>>); |
2957 | |
2958 | impl<'de, T, E> Visitor<'de> for ResultVisitor<T, E> |
2959 | where |
2960 | T: Deserialize<'de>, |
2961 | E: Deserialize<'de>, |
2962 | { |
2963 | type Value = Result<T, E>; |
2964 | |
2965 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
2966 | formatter.write_str("enum Result" ) |
2967 | } |
2968 | |
2969 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
2970 | where |
2971 | A: EnumAccess<'de>, |
2972 | { |
2973 | match tri!(data.variant()) { |
2974 | (Field::Ok, v) => v.newtype_variant().map(Ok), |
2975 | (Field::Err, v) => v.newtype_variant().map(Err), |
2976 | } |
2977 | } |
2978 | } |
2979 | |
2980 | const VARIANTS: &[&str] = &["Ok" , "Err" ]; |
2981 | |
2982 | deserializer.deserialize_enum("Result" , VARIANTS, ResultVisitor(PhantomData)) |
2983 | } |
2984 | } |
2985 | |
2986 | //////////////////////////////////////////////////////////////////////////////// |
2987 | |
2988 | impl<'de, T> Deserialize<'de> for Wrapping<T> |
2989 | where |
2990 | T: Deserialize<'de>, |
2991 | { |
2992 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
2993 | where |
2994 | D: Deserializer<'de>, |
2995 | { |
2996 | Deserialize::deserialize(deserializer).map(Wrapping) |
2997 | } |
2998 | } |
2999 | |
3000 | #[cfg (all(feature = "std" , not(no_std_atomic)))] |
3001 | macro_rules! atomic_impl { |
3002 | ($($ty:ident $size:expr)*) => { |
3003 | $( |
3004 | #[cfg(any(no_target_has_atomic, target_has_atomic = $size))] |
3005 | #[cfg_attr(doc_cfg, doc(cfg(all(feature = "std" , target_has_atomic = $size))))] |
3006 | impl<'de> Deserialize<'de> for $ty { |
3007 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
3008 | where |
3009 | D: Deserializer<'de>, |
3010 | { |
3011 | Deserialize::deserialize(deserializer).map(Self::new) |
3012 | } |
3013 | } |
3014 | )* |
3015 | }; |
3016 | } |
3017 | |
3018 | #[cfg (all(feature = "std" , not(no_std_atomic)))] |
3019 | atomic_impl! { |
3020 | AtomicBool "8" |
3021 | AtomicI8 "8" |
3022 | AtomicI16 "16" |
3023 | AtomicI32 "32" |
3024 | AtomicIsize "ptr" |
3025 | AtomicU8 "8" |
3026 | AtomicU16 "16" |
3027 | AtomicU32 "32" |
3028 | AtomicUsize "ptr" |
3029 | } |
3030 | |
3031 | #[cfg (all(feature = "std" , not(no_std_atomic64)))] |
3032 | atomic_impl! { |
3033 | AtomicI64 "64" |
3034 | AtomicU64 "64" |
3035 | } |
3036 | |
3037 | #[cfg (feature = "std" )] |
3038 | struct FromStrVisitor<T> { |
3039 | expecting: &'static str, |
3040 | ty: PhantomData<T>, |
3041 | } |
3042 | |
3043 | #[cfg (feature = "std" )] |
3044 | impl<T> FromStrVisitor<T> { |
3045 | fn new(expecting: &'static str) -> Self { |
3046 | FromStrVisitor { |
3047 | expecting, |
3048 | ty: PhantomData, |
3049 | } |
3050 | } |
3051 | } |
3052 | |
3053 | #[cfg (feature = "std" )] |
3054 | impl<'de, T> Visitor<'de> for FromStrVisitor<T> |
3055 | where |
3056 | T: str::FromStr, |
3057 | T::Err: fmt::Display, |
3058 | { |
3059 | type Value = T; |
3060 | |
3061 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
3062 | formatter.write_str(self.expecting) |
3063 | } |
3064 | |
3065 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> |
3066 | where |
3067 | E: Error, |
3068 | { |
3069 | s.parse().map_err(Error::custom) |
3070 | } |
3071 | } |
3072 | |