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Commit | Line | Data |
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1 | use crate::error::Error; | |
2 | use crate::lib::str::FromStr; | |
3 | use crate::lib::*; | |
4 | use crate::map::Map; | |
5 | use crate::number::Number; | |
6 | use crate::value::Value; | |
7 | use serde::de::{ | |
8 | self, Deserialize, DeserializeSeed, EnumAccess, Expected, IntoDeserializer, MapAccess, | |
9 | SeqAccess, Unexpected, VariantAccess, Visitor, | |
10 | }; | |
11 | use serde::{forward_to_deserialize_any, serde_if_integer128}; | |
12 | ||
13 | #[cfg(feature = "arbitrary_precision")] | |
14 | use crate::number::NumberFromString; | |
15 | ||
16 | impl<'de> Deserialize<'de> for Value { | |
17 | #[inline] | |
18 | fn deserialize<D>(deserializer: D) -> Result<Value, D::Error> | |
19 | where | |
20 | D: serde::Deserializer<'de>, | |
21 | { | |
22 | struct ValueVisitor; | |
23 | ||
24 | impl<'de> Visitor<'de> for ValueVisitor { | |
25 | type Value = Value; | |
26 | ||
27 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
28 | formatter.write_str("any valid JSON value") | |
29 | } | |
30 | ||
31 | #[inline] | |
32 | fn visit_bool<E>(self, value: bool) -> Result<Value, E> { | |
33 | Ok(Value::Bool(value)) | |
34 | } | |
35 | ||
36 | #[inline] | |
37 | fn visit_i64<E>(self, value: i64) -> Result<Value, E> { | |
38 | Ok(Value::Number(value.into())) | |
39 | } | |
40 | ||
41 | #[inline] | |
42 | fn visit_u64<E>(self, value: u64) -> Result<Value, E> { | |
43 | Ok(Value::Number(value.into())) | |
44 | } | |
45 | ||
46 | #[inline] | |
47 | fn visit_f64<E>(self, value: f64) -> Result<Value, E> { | |
48 | Ok(Number::from_f64(value).map_or(Value::Null, Value::Number)) | |
49 | } | |
50 | ||
51 | #[cfg(any(feature = "std", feature = "alloc"))] | |
52 | #[inline] | |
53 | fn visit_str<E>(self, value: &str) -> Result<Value, E> | |
54 | where | |
55 | E: serde::de::Error, | |
56 | { | |
57 | self.visit_string(String::from(value)) | |
58 | } | |
59 | ||
60 | #[cfg(any(feature = "std", feature = "alloc"))] | |
61 | #[inline] | |
62 | fn visit_string<E>(self, value: String) -> Result<Value, E> { | |
63 | Ok(Value::String(value)) | |
64 | } | |
65 | ||
66 | #[inline] | |
67 | fn visit_none<E>(self) -> Result<Value, E> { | |
68 | Ok(Value::Null) | |
69 | } | |
70 | ||
71 | #[inline] | |
72 | fn visit_some<D>(self, deserializer: D) -> Result<Value, D::Error> | |
73 | where | |
74 | D: serde::Deserializer<'de>, | |
75 | { | |
76 | Deserialize::deserialize(deserializer) | |
77 | } | |
78 | ||
79 | #[inline] | |
80 | fn visit_unit<E>(self) -> Result<Value, E> { | |
81 | Ok(Value::Null) | |
82 | } | |
83 | ||
84 | #[inline] | |
85 | fn visit_seq<V>(self, mut visitor: V) -> Result<Value, V::Error> | |
86 | where | |
87 | V: SeqAccess<'de>, | |
88 | { | |
89 | let mut vec = Vec::new(); | |
90 | ||
91 | while let Some(elem) = tri!(visitor.next_element()) { | |
92 | vec.push(elem); | |
93 | } | |
94 | ||
95 | Ok(Value::Array(vec)) | |
96 | } | |
97 | ||
98 | #[cfg(any(feature = "std", feature = "alloc"))] | |
99 | fn visit_map<V>(self, mut visitor: V) -> Result<Value, V::Error> | |
100 | where | |
101 | V: MapAccess<'de>, | |
102 | { | |
103 | match visitor.next_key_seed(KeyClassifier)? { | |
104 | #[cfg(feature = "arbitrary_precision")] | |
105 | Some(KeyClass::Number) => { | |
106 | let number: NumberFromString = visitor.next_value()?; | |
107 | Ok(Value::Number(number.value)) | |
108 | } | |
109 | #[cfg(feature = "raw_value")] | |
110 | Some(KeyClass::RawValue) => { | |
111 | let value = visitor.next_value_seed(crate::raw::BoxedFromString)?; | |
112 | crate::from_str(value.get()).map_err(de::Error::custom) | |
113 | } | |
114 | Some(KeyClass::Map(first_key)) => { | |
115 | let mut values = Map::new(); | |
116 | ||
117 | values.insert(first_key, tri!(visitor.next_value())); | |
118 | while let Some((key, value)) = tri!(visitor.next_entry()) { | |
119 | values.insert(key, value); | |
120 | } | |
121 | ||
122 | Ok(Value::Object(values)) | |
123 | } | |
124 | None => Ok(Value::Object(Map::new())), | |
125 | } | |
126 | } | |
127 | } | |
128 | ||
129 | deserializer.deserialize_any(ValueVisitor) | |
130 | } | |
131 | } | |
132 | ||
133 | impl FromStr for Value { | |
134 | type Err = Error; | |
135 | fn from_str(s: &str) -> Result<Value, Error> { | |
136 | super::super::de::from_str(s) | |
137 | } | |
138 | } | |
139 | ||
140 | macro_rules! deserialize_number { | |
141 | ($method:ident) => { | |
142 | #[cfg(not(feature = "arbitrary_precision"))] | |
143 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
144 | where | |
145 | V: Visitor<'de>, | |
146 | { | |
147 | match self { | |
148 | Value::Number(n) => n.deserialize_any(visitor), | |
149 | _ => Err(self.invalid_type(&visitor)), | |
150 | } | |
151 | } | |
152 | ||
153 | #[cfg(feature = "arbitrary_precision")] | |
154 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
155 | where | |
156 | V: Visitor<'de>, | |
157 | { | |
158 | match self { | |
159 | Value::Number(n) => n.$method(visitor), | |
160 | _ => self.deserialize_any(visitor), | |
161 | } | |
162 | } | |
163 | }; | |
164 | } | |
165 | ||
166 | fn visit_array<'de, V>(array: Vec<Value>, visitor: V) -> Result<V::Value, Error> | |
167 | where | |
168 | V: Visitor<'de>, | |
169 | { | |
170 | let len = array.len(); | |
171 | let mut deserializer = SeqDeserializer::new(array); | |
172 | let seq = tri!(visitor.visit_seq(&mut deserializer)); | |
173 | let remaining = deserializer.iter.len(); | |
174 | if remaining == 0 { | |
175 | Ok(seq) | |
176 | } else { | |
177 | Err(serde::de::Error::invalid_length( | |
178 | len, | |
179 | &"fewer elements in array", | |
180 | )) | |
181 | } | |
182 | } | |
183 | ||
184 | fn visit_object<'de, V>(object: Map<String, Value>, visitor: V) -> Result<V::Value, Error> | |
185 | where | |
186 | V: Visitor<'de>, | |
187 | { | |
188 | let len = object.len(); | |
189 | let mut deserializer = MapDeserializer::new(object); | |
190 | let map = tri!(visitor.visit_map(&mut deserializer)); | |
191 | let remaining = deserializer.iter.len(); | |
192 | if remaining == 0 { | |
193 | Ok(map) | |
194 | } else { | |
195 | Err(serde::de::Error::invalid_length( | |
196 | len, | |
197 | &"fewer elements in map", | |
198 | )) | |
199 | } | |
200 | } | |
201 | ||
202 | impl<'de> serde::Deserializer<'de> for Value { | |
203 | type Error = Error; | |
204 | ||
205 | #[inline] | |
206 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
207 | where | |
208 | V: Visitor<'de>, | |
209 | { | |
210 | match self { | |
211 | Value::Null => visitor.visit_unit(), | |
212 | Value::Bool(v) => visitor.visit_bool(v), | |
213 | Value::Number(n) => n.deserialize_any(visitor), | |
214 | #[cfg(any(feature = "std", feature = "alloc"))] | |
215 | Value::String(v) => visitor.visit_string(v), | |
216 | Value::Array(v) => visit_array(v, visitor), | |
217 | Value::Object(v) => visit_object(v, visitor), | |
218 | } | |
219 | } | |
220 | ||
221 | deserialize_number!(deserialize_i8); | |
222 | deserialize_number!(deserialize_i16); | |
223 | deserialize_number!(deserialize_i32); | |
224 | deserialize_number!(deserialize_i64); | |
225 | deserialize_number!(deserialize_u8); | |
226 | deserialize_number!(deserialize_u16); | |
227 | deserialize_number!(deserialize_u32); | |
228 | deserialize_number!(deserialize_u64); | |
229 | deserialize_number!(deserialize_f32); | |
230 | deserialize_number!(deserialize_f64); | |
231 | ||
232 | serde_if_integer128! { | |
233 | deserialize_number!(deserialize_i128); | |
234 | deserialize_number!(deserialize_u128); | |
235 | } | |
236 | ||
237 | #[inline] | |
238 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> | |
239 | where | |
240 | V: Visitor<'de>, | |
241 | { | |
242 | match self { | |
243 | Value::Null => visitor.visit_none(), | |
244 | _ => visitor.visit_some(self), | |
245 | } | |
246 | } | |
247 | ||
248 | #[inline] | |
249 | fn deserialize_enum<V>( | |
250 | self, | |
251 | _name: &str, | |
252 | _variants: &'static [&'static str], | |
253 | visitor: V, | |
254 | ) -> Result<V::Value, Error> | |
255 | where | |
256 | V: Visitor<'de>, | |
257 | { | |
258 | let (variant, value) = match self { | |
259 | Value::Object(value) => { | |
260 | let mut iter = value.into_iter(); | |
261 | let (variant, value) = match iter.next() { | |
262 | Some(v) => v, | |
263 | None => { | |
264 | return Err(serde::de::Error::invalid_value( | |
265 | Unexpected::Map, | |
266 | &"map with a single key", | |
267 | )); | |
268 | } | |
269 | }; | |
270 | // enums are encoded in json as maps with a single key:value pair | |
271 | if iter.next().is_some() { | |
272 | return Err(serde::de::Error::invalid_value( | |
273 | Unexpected::Map, | |
274 | &"map with a single key", | |
275 | )); | |
276 | } | |
277 | (variant, Some(value)) | |
278 | } | |
279 | Value::String(variant) => (variant, None), | |
280 | other => { | |
281 | return Err(serde::de::Error::invalid_type( | |
282 | other.unexpected(), | |
283 | &"string or map", | |
284 | )); | |
285 | } | |
286 | }; | |
287 | ||
288 | visitor.visit_enum(EnumDeserializer { variant, value }) | |
289 | } | |
290 | ||
291 | #[inline] | |
292 | fn deserialize_newtype_struct<V>( | |
293 | self, | |
294 | name: &'static str, | |
295 | visitor: V, | |
296 | ) -> Result<V::Value, Error> | |
297 | where | |
298 | V: Visitor<'de>, | |
299 | { | |
300 | #[cfg(feature = "raw_value")] | |
301 | { | |
302 | if name == crate::raw::TOKEN { | |
303 | return visitor.visit_map(crate::raw::OwnedRawDeserializer { | |
304 | raw_value: Some(self.to_string()), | |
305 | }); | |
306 | } | |
307 | } | |
308 | ||
309 | let _ = name; | |
310 | visitor.visit_newtype_struct(self) | |
311 | } | |
312 | ||
313 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Error> | |
314 | where | |
315 | V: Visitor<'de>, | |
316 | { | |
317 | match self { | |
318 | Value::Bool(v) => visitor.visit_bool(v), | |
319 | _ => Err(self.invalid_type(&visitor)), | |
320 | } | |
321 | } | |
322 | ||
323 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Error> | |
324 | where | |
325 | V: Visitor<'de>, | |
326 | { | |
327 | self.deserialize_string(visitor) | |
328 | } | |
329 | ||
330 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Error> | |
331 | where | |
332 | V: Visitor<'de>, | |
333 | { | |
334 | self.deserialize_string(visitor) | |
335 | } | |
336 | ||
337 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Error> | |
338 | where | |
339 | V: Visitor<'de>, | |
340 | { | |
341 | match self { | |
342 | #[cfg(any(feature = "std", feature = "alloc"))] | |
343 | Value::String(v) => visitor.visit_string(v), | |
344 | _ => Err(self.invalid_type(&visitor)), | |
345 | } | |
346 | } | |
347 | ||
348 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Error> | |
349 | where | |
350 | V: Visitor<'de>, | |
351 | { | |
352 | self.deserialize_byte_buf(visitor) | |
353 | } | |
354 | ||
355 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Error> | |
356 | where | |
357 | V: Visitor<'de>, | |
358 | { | |
359 | match self { | |
360 | #[cfg(any(feature = "std", feature = "alloc"))] | |
361 | Value::String(v) => visitor.visit_string(v), | |
362 | Value::Array(v) => visit_array(v, visitor), | |
363 | _ => Err(self.invalid_type(&visitor)), | |
364 | } | |
365 | } | |
366 | ||
367 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Error> | |
368 | where | |
369 | V: Visitor<'de>, | |
370 | { | |
371 | match self { | |
372 | Value::Null => visitor.visit_unit(), | |
373 | _ => Err(self.invalid_type(&visitor)), | |
374 | } | |
375 | } | |
376 | ||
377 | fn deserialize_unit_struct<V>(self, _name: &'static str, visitor: V) -> Result<V::Value, Error> | |
378 | where | |
379 | V: Visitor<'de>, | |
380 | { | |
381 | self.deserialize_unit(visitor) | |
382 | } | |
383 | ||
384 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Error> | |
385 | where | |
386 | V: Visitor<'de>, | |
387 | { | |
388 | match self { | |
389 | Value::Array(v) => visit_array(v, visitor), | |
390 | _ => Err(self.invalid_type(&visitor)), | |
391 | } | |
392 | } | |
393 | ||
394 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
395 | where | |
396 | V: Visitor<'de>, | |
397 | { | |
398 | self.deserialize_seq(visitor) | |
399 | } | |
400 | ||
401 | fn deserialize_tuple_struct<V>( | |
402 | self, | |
403 | _name: &'static str, | |
404 | _len: usize, | |
405 | visitor: V, | |
406 | ) -> Result<V::Value, Error> | |
407 | where | |
408 | V: Visitor<'de>, | |
409 | { | |
410 | self.deserialize_seq(visitor) | |
411 | } | |
412 | ||
413 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Error> | |
414 | where | |
415 | V: Visitor<'de>, | |
416 | { | |
417 | match self { | |
418 | Value::Object(v) => visit_object(v, visitor), | |
419 | _ => Err(self.invalid_type(&visitor)), | |
420 | } | |
421 | } | |
422 | ||
423 | fn deserialize_struct<V>( | |
424 | self, | |
425 | _name: &'static str, | |
426 | _fields: &'static [&'static str], | |
427 | visitor: V, | |
428 | ) -> Result<V::Value, Error> | |
429 | where | |
430 | V: Visitor<'de>, | |
431 | { | |
432 | match self { | |
433 | Value::Array(v) => visit_array(v, visitor), | |
434 | Value::Object(v) => visit_object(v, visitor), | |
435 | _ => Err(self.invalid_type(&visitor)), | |
436 | } | |
437 | } | |
438 | ||
439 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Error> | |
440 | where | |
441 | V: Visitor<'de>, | |
442 | { | |
443 | self.deserialize_string(visitor) | |
444 | } | |
445 | ||
446 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
447 | where | |
448 | V: Visitor<'de>, | |
449 | { | |
450 | drop(self); | |
451 | visitor.visit_unit() | |
452 | } | |
453 | } | |
454 | ||
455 | struct EnumDeserializer { | |
456 | variant: String, | |
457 | value: Option<Value>, | |
458 | } | |
459 | ||
460 | impl<'de> EnumAccess<'de> for EnumDeserializer { | |
461 | type Error = Error; | |
462 | type Variant = VariantDeserializer; | |
463 | ||
464 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, VariantDeserializer), Error> | |
465 | where | |
466 | V: DeserializeSeed<'de>, | |
467 | { | |
468 | let variant = self.variant.into_deserializer(); | |
469 | let visitor = VariantDeserializer { value: self.value }; | |
470 | seed.deserialize(variant).map(|v| (v, visitor)) | |
471 | } | |
472 | } | |
473 | ||
474 | impl<'de> IntoDeserializer<'de, Error> for Value { | |
475 | type Deserializer = Self; | |
476 | ||
477 | fn into_deserializer(self) -> Self::Deserializer { | |
478 | self | |
479 | } | |
480 | } | |
481 | ||
482 | struct VariantDeserializer { | |
483 | value: Option<Value>, | |
484 | } | |
485 | ||
486 | impl<'de> VariantAccess<'de> for VariantDeserializer { | |
487 | type Error = Error; | |
488 | ||
489 | fn unit_variant(self) -> Result<(), Error> { | |
490 | match self.value { | |
491 | Some(value) => Deserialize::deserialize(value), | |
492 | None => Ok(()), | |
493 | } | |
494 | } | |
495 | ||
496 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> | |
497 | where | |
498 | T: DeserializeSeed<'de>, | |
499 | { | |
500 | match self.value { | |
501 | Some(value) => seed.deserialize(value), | |
502 | None => Err(serde::de::Error::invalid_type( | |
503 | Unexpected::UnitVariant, | |
504 | &"newtype variant", | |
505 | )), | |
506 | } | |
507 | } | |
508 | ||
509 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
510 | where | |
511 | V: Visitor<'de>, | |
512 | { | |
513 | match self.value { | |
514 | Some(Value::Array(v)) => { | |
515 | serde::Deserializer::deserialize_any(SeqDeserializer::new(v), visitor) | |
516 | } | |
517 | Some(other) => Err(serde::de::Error::invalid_type( | |
518 | other.unexpected(), | |
519 | &"tuple variant", | |
520 | )), | |
521 | None => Err(serde::de::Error::invalid_type( | |
522 | Unexpected::UnitVariant, | |
523 | &"tuple variant", | |
524 | )), | |
525 | } | |
526 | } | |
527 | ||
528 | fn struct_variant<V>( | |
529 | self, | |
530 | _fields: &'static [&'static str], | |
531 | visitor: V, | |
532 | ) -> Result<V::Value, Error> | |
533 | where | |
534 | V: Visitor<'de>, | |
535 | { | |
536 | match self.value { | |
537 | Some(Value::Object(v)) => { | |
538 | serde::Deserializer::deserialize_any(MapDeserializer::new(v), visitor) | |
539 | } | |
540 | Some(other) => Err(serde::de::Error::invalid_type( | |
541 | other.unexpected(), | |
542 | &"struct variant", | |
543 | )), | |
544 | None => Err(serde::de::Error::invalid_type( | |
545 | Unexpected::UnitVariant, | |
546 | &"struct variant", | |
547 | )), | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
552 | struct SeqDeserializer { | |
553 | iter: vec::IntoIter<Value>, | |
554 | } | |
555 | ||
556 | impl SeqDeserializer { | |
557 | fn new(vec: Vec<Value>) -> Self { | |
558 | SeqDeserializer { | |
559 | iter: vec.into_iter(), | |
560 | } | |
561 | } | |
562 | } | |
563 | ||
564 | impl<'de> serde::Deserializer<'de> for SeqDeserializer { | |
565 | type Error = Error; | |
566 | ||
567 | #[inline] | |
568 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Error> | |
569 | where | |
570 | V: Visitor<'de>, | |
571 | { | |
572 | let len = self.iter.len(); | |
573 | if len == 0 { | |
574 | visitor.visit_unit() | |
575 | } else { | |
576 | let ret = tri!(visitor.visit_seq(&mut self)); | |
577 | let remaining = self.iter.len(); | |
578 | if remaining == 0 { | |
579 | Ok(ret) | |
580 | } else { | |
581 | Err(serde::de::Error::invalid_length( | |
582 | len, | |
583 | &"fewer elements in array", | |
584 | )) | |
585 | } | |
586 | } | |
587 | } | |
588 | ||
589 | forward_to_deserialize_any! { | |
590 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
591 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
592 | tuple_struct map struct enum identifier ignored_any | |
593 | } | |
594 | } | |
595 | ||
596 | impl<'de> SeqAccess<'de> for SeqDeserializer { | |
597 | type Error = Error; | |
598 | ||
599 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
600 | where | |
601 | T: DeserializeSeed<'de>, | |
602 | { | |
603 | match self.iter.next() { | |
604 | Some(value) => seed.deserialize(value).map(Some), | |
605 | None => Ok(None), | |
606 | } | |
607 | } | |
608 | ||
609 | fn size_hint(&self) -> Option<usize> { | |
610 | match self.iter.size_hint() { | |
611 | (lower, Some(upper)) if lower == upper => Some(upper), | |
612 | _ => None, | |
613 | } | |
614 | } | |
615 | } | |
616 | ||
617 | struct MapDeserializer { | |
618 | iter: <Map<String, Value> as IntoIterator>::IntoIter, | |
619 | value: Option<Value>, | |
620 | } | |
621 | ||
622 | impl MapDeserializer { | |
623 | fn new(map: Map<String, Value>) -> Self { | |
624 | MapDeserializer { | |
625 | iter: map.into_iter(), | |
626 | value: None, | |
627 | } | |
628 | } | |
629 | } | |
630 | ||
631 | impl<'de> MapAccess<'de> for MapDeserializer { | |
632 | type Error = Error; | |
633 | ||
634 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
635 | where | |
636 | T: DeserializeSeed<'de>, | |
637 | { | |
638 | match self.iter.next() { | |
639 | Some((key, value)) => { | |
640 | self.value = Some(value); | |
641 | let key_de = MapKeyDeserializer { | |
642 | key: Cow::Owned(key), | |
643 | }; | |
644 | seed.deserialize(key_de).map(Some) | |
645 | } | |
646 | None => Ok(None), | |
647 | } | |
648 | } | |
649 | ||
650 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> | |
651 | where | |
652 | T: DeserializeSeed<'de>, | |
653 | { | |
654 | match self.value.take() { | |
655 | Some(value) => seed.deserialize(value), | |
656 | None => Err(serde::de::Error::custom("value is missing")), | |
657 | } | |
658 | } | |
659 | ||
660 | fn size_hint(&self) -> Option<usize> { | |
661 | match self.iter.size_hint() { | |
662 | (lower, Some(upper)) if lower == upper => Some(upper), | |
663 | _ => None, | |
664 | } | |
665 | } | |
666 | } | |
667 | ||
668 | impl<'de> serde::Deserializer<'de> for MapDeserializer { | |
669 | type Error = Error; | |
670 | ||
671 | #[inline] | |
672 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
673 | where | |
674 | V: Visitor<'de>, | |
675 | { | |
676 | visitor.visit_map(self) | |
677 | } | |
678 | ||
679 | forward_to_deserialize_any! { | |
680 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
681 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
682 | tuple_struct map struct enum identifier ignored_any | |
683 | } | |
684 | } | |
685 | ||
686 | macro_rules! deserialize_value_ref_number { | |
687 | ($method:ident) => { | |
688 | #[cfg(not(feature = "arbitrary_precision"))] | |
689 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
690 | where | |
691 | V: Visitor<'de>, | |
692 | { | |
693 | match *self { | |
694 | Value::Number(ref n) => n.deserialize_any(visitor), | |
695 | _ => Err(self.invalid_type(&visitor)), | |
696 | } | |
697 | } | |
698 | ||
699 | #[cfg(feature = "arbitrary_precision")] | |
700 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
701 | where | |
702 | V: Visitor<'de>, | |
703 | { | |
704 | match *self { | |
705 | Value::Number(ref n) => n.$method(visitor), | |
706 | _ => self.deserialize_any(visitor), | |
707 | } | |
708 | } | |
709 | }; | |
710 | } | |
711 | ||
712 | fn visit_array_ref<'de, V>(array: &'de [Value], visitor: V) -> Result<V::Value, Error> | |
713 | where | |
714 | V: Visitor<'de>, | |
715 | { | |
716 | let len = array.len(); | |
717 | let mut deserializer = SeqRefDeserializer::new(array); | |
718 | let seq = tri!(visitor.visit_seq(&mut deserializer)); | |
719 | let remaining = deserializer.iter.len(); | |
720 | if remaining == 0 { | |
721 | Ok(seq) | |
722 | } else { | |
723 | Err(serde::de::Error::invalid_length( | |
724 | len, | |
725 | &"fewer elements in array", | |
726 | )) | |
727 | } | |
728 | } | |
729 | ||
730 | fn visit_object_ref<'de, V>(object: &'de Map<String, Value>, visitor: V) -> Result<V::Value, Error> | |
731 | where | |
732 | V: Visitor<'de>, | |
733 | { | |
734 | let len = object.len(); | |
735 | let mut deserializer = MapRefDeserializer::new(object); | |
736 | let map = tri!(visitor.visit_map(&mut deserializer)); | |
737 | let remaining = deserializer.iter.len(); | |
738 | if remaining == 0 { | |
739 | Ok(map) | |
740 | } else { | |
741 | Err(serde::de::Error::invalid_length( | |
742 | len, | |
743 | &"fewer elements in map", | |
744 | )) | |
745 | } | |
746 | } | |
747 | ||
748 | impl<'de> serde::Deserializer<'de> for &'de Value { | |
749 | type Error = Error; | |
750 | ||
751 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
752 | where | |
753 | V: Visitor<'de>, | |
754 | { | |
755 | match *self { | |
756 | Value::Null => visitor.visit_unit(), | |
757 | Value::Bool(v) => visitor.visit_bool(v), | |
758 | Value::Number(ref n) => n.deserialize_any(visitor), | |
759 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
760 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
761 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
762 | } | |
763 | } | |
764 | ||
765 | deserialize_value_ref_number!(deserialize_i8); | |
766 | deserialize_value_ref_number!(deserialize_i16); | |
767 | deserialize_value_ref_number!(deserialize_i32); | |
768 | deserialize_value_ref_number!(deserialize_i64); | |
769 | deserialize_value_ref_number!(deserialize_u8); | |
770 | deserialize_value_ref_number!(deserialize_u16); | |
771 | deserialize_value_ref_number!(deserialize_u32); | |
772 | deserialize_value_ref_number!(deserialize_u64); | |
773 | deserialize_value_ref_number!(deserialize_f32); | |
774 | deserialize_value_ref_number!(deserialize_f64); | |
775 | ||
776 | serde_if_integer128! { | |
777 | deserialize_number!(deserialize_i128); | |
778 | deserialize_number!(deserialize_u128); | |
779 | } | |
780 | ||
781 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> | |
782 | where | |
783 | V: Visitor<'de>, | |
784 | { | |
785 | match *self { | |
786 | Value::Null => visitor.visit_none(), | |
787 | _ => visitor.visit_some(self), | |
788 | } | |
789 | } | |
790 | ||
791 | fn deserialize_enum<V>( | |
792 | self, | |
793 | _name: &str, | |
794 | _variants: &'static [&'static str], | |
795 | visitor: V, | |
796 | ) -> Result<V::Value, Error> | |
797 | where | |
798 | V: Visitor<'de>, | |
799 | { | |
800 | let (variant, value) = match *self { | |
801 | Value::Object(ref value) => { | |
802 | let mut iter = value.into_iter(); | |
803 | let (variant, value) = match iter.next() { | |
804 | Some(v) => v, | |
805 | None => { | |
806 | return Err(serde::de::Error::invalid_value( | |
807 | Unexpected::Map, | |
808 | &"map with a single key", | |
809 | )); | |
810 | } | |
811 | }; | |
812 | // enums are encoded in json as maps with a single key:value pair | |
813 | if iter.next().is_some() { | |
814 | return Err(serde::de::Error::invalid_value( | |
815 | Unexpected::Map, | |
816 | &"map with a single key", | |
817 | )); | |
818 | } | |
819 | (variant, Some(value)) | |
820 | } | |
821 | Value::String(ref variant) => (variant, None), | |
822 | ref other => { | |
823 | return Err(serde::de::Error::invalid_type( | |
824 | other.unexpected(), | |
825 | &"string or map", | |
826 | )); | |
827 | } | |
828 | }; | |
829 | ||
830 | visitor.visit_enum(EnumRefDeserializer { variant, value }) | |
831 | } | |
832 | ||
833 | #[inline] | |
834 | fn deserialize_newtype_struct<V>( | |
835 | self, | |
836 | name: &'static str, | |
837 | visitor: V, | |
838 | ) -> Result<V::Value, Error> | |
839 | where | |
840 | V: Visitor<'de>, | |
841 | { | |
842 | #[cfg(feature = "raw_value")] | |
843 | { | |
844 | if name == crate::raw::TOKEN { | |
845 | return visitor.visit_map(crate::raw::OwnedRawDeserializer { | |
846 | raw_value: Some(self.to_string()), | |
847 | }); | |
848 | } | |
849 | } | |
850 | ||
851 | let _ = name; | |
852 | visitor.visit_newtype_struct(self) | |
853 | } | |
854 | ||
855 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Error> | |
856 | where | |
857 | V: Visitor<'de>, | |
858 | { | |
859 | match *self { | |
860 | Value::Bool(v) => visitor.visit_bool(v), | |
861 | _ => Err(self.invalid_type(&visitor)), | |
862 | } | |
863 | } | |
864 | ||
865 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Error> | |
866 | where | |
867 | V: Visitor<'de>, | |
868 | { | |
869 | self.deserialize_str(visitor) | |
870 | } | |
871 | ||
872 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Error> | |
873 | where | |
874 | V: Visitor<'de>, | |
875 | { | |
876 | match *self { | |
877 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
878 | _ => Err(self.invalid_type(&visitor)), | |
879 | } | |
880 | } | |
881 | ||
882 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Error> | |
883 | where | |
884 | V: Visitor<'de>, | |
885 | { | |
886 | self.deserialize_str(visitor) | |
887 | } | |
888 | ||
889 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Error> | |
890 | where | |
891 | V: Visitor<'de>, | |
892 | { | |
893 | match *self { | |
894 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
895 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
896 | _ => Err(self.invalid_type(&visitor)), | |
897 | } | |
898 | } | |
899 | ||
900 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Error> | |
901 | where | |
902 | V: Visitor<'de>, | |
903 | { | |
904 | self.deserialize_bytes(visitor) | |
905 | } | |
906 | ||
907 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Error> | |
908 | where | |
909 | V: Visitor<'de>, | |
910 | { | |
911 | match *self { | |
912 | Value::Null => visitor.visit_unit(), | |
913 | _ => Err(self.invalid_type(&visitor)), | |
914 | } | |
915 | } | |
916 | ||
917 | fn deserialize_unit_struct<V>(self, _name: &'static str, visitor: V) -> Result<V::Value, Error> | |
918 | where | |
919 | V: Visitor<'de>, | |
920 | { | |
921 | self.deserialize_unit(visitor) | |
922 | } | |
923 | ||
924 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Error> | |
925 | where | |
926 | V: Visitor<'de>, | |
927 | { | |
928 | match *self { | |
929 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
930 | _ => Err(self.invalid_type(&visitor)), | |
931 | } | |
932 | } | |
933 | ||
934 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
935 | where | |
936 | V: Visitor<'de>, | |
937 | { | |
938 | self.deserialize_seq(visitor) | |
939 | } | |
940 | ||
941 | fn deserialize_tuple_struct<V>( | |
942 | self, | |
943 | _name: &'static str, | |
944 | _len: usize, | |
945 | visitor: V, | |
946 | ) -> Result<V::Value, Error> | |
947 | where | |
948 | V: Visitor<'de>, | |
949 | { | |
950 | self.deserialize_seq(visitor) | |
951 | } | |
952 | ||
953 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Error> | |
954 | where | |
955 | V: Visitor<'de>, | |
956 | { | |
957 | match *self { | |
958 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
959 | _ => Err(self.invalid_type(&visitor)), | |
960 | } | |
961 | } | |
962 | ||
963 | fn deserialize_struct<V>( | |
964 | self, | |
965 | _name: &'static str, | |
966 | _fields: &'static [&'static str], | |
967 | visitor: V, | |
968 | ) -> Result<V::Value, Error> | |
969 | where | |
970 | V: Visitor<'de>, | |
971 | { | |
972 | match *self { | |
973 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
974 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
975 | _ => Err(self.invalid_type(&visitor)), | |
976 | } | |
977 | } | |
978 | ||
979 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Error> | |
980 | where | |
981 | V: Visitor<'de>, | |
982 | { | |
983 | self.deserialize_str(visitor) | |
984 | } | |
985 | ||
986 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
987 | where | |
988 | V: Visitor<'de>, | |
989 | { | |
990 | visitor.visit_unit() | |
991 | } | |
992 | } | |
993 | ||
994 | struct EnumRefDeserializer<'de> { | |
995 | variant: &'de str, | |
996 | value: Option<&'de Value>, | |
997 | } | |
998 | ||
999 | impl<'de> EnumAccess<'de> for EnumRefDeserializer<'de> { | |
1000 | type Error = Error; | |
1001 | type Variant = VariantRefDeserializer<'de>; | |
1002 | ||
1003 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Error> | |
1004 | where | |
1005 | V: DeserializeSeed<'de>, | |
1006 | { | |
1007 | let variant = self.variant.into_deserializer(); | |
1008 | let visitor = VariantRefDeserializer { value: self.value }; | |
1009 | seed.deserialize(variant).map(|v| (v, visitor)) | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | struct VariantRefDeserializer<'de> { | |
1014 | value: Option<&'de Value>, | |
1015 | } | |
1016 | ||
1017 | impl<'de> VariantAccess<'de> for VariantRefDeserializer<'de> { | |
1018 | type Error = Error; | |
1019 | ||
1020 | fn unit_variant(self) -> Result<(), Error> { | |
1021 | match self.value { | |
1022 | Some(value) => Deserialize::deserialize(value), | |
1023 | None => Ok(()), | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> | |
1028 | where | |
1029 | T: DeserializeSeed<'de>, | |
1030 | { | |
1031 | match self.value { | |
1032 | Some(value) => seed.deserialize(value), | |
1033 | None => Err(serde::de::Error::invalid_type( | |
1034 | Unexpected::UnitVariant, | |
1035 | &"newtype variant", | |
1036 | )), | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
1041 | where | |
1042 | V: Visitor<'de>, | |
1043 | { | |
1044 | match self.value { | |
1045 | Some(&Value::Array(ref v)) => { | |
1046 | serde::Deserializer::deserialize_any(SeqRefDeserializer::new(v), visitor) | |
1047 | } | |
1048 | Some(other) => Err(serde::de::Error::invalid_type( | |
1049 | other.unexpected(), | |
1050 | &"tuple variant", | |
1051 | )), | |
1052 | None => Err(serde::de::Error::invalid_type( | |
1053 | Unexpected::UnitVariant, | |
1054 | &"tuple variant", | |
1055 | )), | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | fn struct_variant<V>( | |
1060 | self, | |
1061 | _fields: &'static [&'static str], | |
1062 | visitor: V, | |
1063 | ) -> Result<V::Value, Error> | |
1064 | where | |
1065 | V: Visitor<'de>, | |
1066 | { | |
1067 | match self.value { | |
1068 | Some(&Value::Object(ref v)) => { | |
1069 | serde::Deserializer::deserialize_any(MapRefDeserializer::new(v), visitor) | |
1070 | } | |
1071 | Some(other) => Err(serde::de::Error::invalid_type( | |
1072 | other.unexpected(), | |
1073 | &"struct variant", | |
1074 | )), | |
1075 | None => Err(serde::de::Error::invalid_type( | |
1076 | Unexpected::UnitVariant, | |
1077 | &"struct variant", | |
1078 | )), | |
1079 | } | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | struct SeqRefDeserializer<'de> { | |
1084 | iter: slice::Iter<'de, Value>, | |
1085 | } | |
1086 | ||
1087 | impl<'de> SeqRefDeserializer<'de> { | |
1088 | fn new(slice: &'de [Value]) -> Self { | |
1089 | SeqRefDeserializer { iter: slice.iter() } | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | impl<'de> serde::Deserializer<'de> for SeqRefDeserializer<'de> { | |
1094 | type Error = Error; | |
1095 | ||
1096 | #[inline] | |
1097 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Error> | |
1098 | where | |
1099 | V: Visitor<'de>, | |
1100 | { | |
1101 | let len = self.iter.len(); | |
1102 | if len == 0 { | |
1103 | visitor.visit_unit() | |
1104 | } else { | |
1105 | let ret = tri!(visitor.visit_seq(&mut self)); | |
1106 | let remaining = self.iter.len(); | |
1107 | if remaining == 0 { | |
1108 | Ok(ret) | |
1109 | } else { | |
1110 | Err(serde::de::Error::invalid_length( | |
1111 | len, | |
1112 | &"fewer elements in array", | |
1113 | )) | |
1114 | } | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | forward_to_deserialize_any! { | |
1119 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
1120 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
1121 | tuple_struct map struct enum identifier ignored_any | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | impl<'de> SeqAccess<'de> for SeqRefDeserializer<'de> { | |
1126 | type Error = Error; | |
1127 | ||
1128 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
1129 | where | |
1130 | T: DeserializeSeed<'de>, | |
1131 | { | |
1132 | match self.iter.next() { | |
1133 | Some(value) => seed.deserialize(value).map(Some), | |
1134 | None => Ok(None), | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | fn size_hint(&self) -> Option<usize> { | |
1139 | match self.iter.size_hint() { | |
1140 | (lower, Some(upper)) if lower == upper => Some(upper), | |
1141 | _ => None, | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | struct MapRefDeserializer<'de> { | |
1147 | iter: <&'de Map<String, Value> as IntoIterator>::IntoIter, | |
1148 | value: Option<&'de Value>, | |
1149 | } | |
1150 | ||
1151 | impl<'de> MapRefDeserializer<'de> { | |
1152 | fn new(map: &'de Map<String, Value>) -> Self { | |
1153 | MapRefDeserializer { | |
1154 | iter: map.into_iter(), | |
1155 | value: None, | |
1156 | } | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | impl<'de> MapAccess<'de> for MapRefDeserializer<'de> { | |
1161 | type Error = Error; | |
1162 | ||
1163 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
1164 | where | |
1165 | T: DeserializeSeed<'de>, | |
1166 | { | |
1167 | match self.iter.next() { | |
1168 | Some((key, value)) => { | |
1169 | self.value = Some(value); | |
1170 | let key_de = MapKeyDeserializer { | |
1171 | key: Cow::Borrowed(&**key), | |
1172 | }; | |
1173 | seed.deserialize(key_de).map(Some) | |
1174 | } | |
1175 | None => Ok(None), | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> | |
1180 | where | |
1181 | T: DeserializeSeed<'de>, | |
1182 | { | |
1183 | match self.value.take() { | |
1184 | Some(value) => seed.deserialize(value), | |
1185 | None => Err(serde::de::Error::custom("value is missing")), | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | fn size_hint(&self) -> Option<usize> { | |
1190 | match self.iter.size_hint() { | |
1191 | (lower, Some(upper)) if lower == upper => Some(upper), | |
1192 | _ => None, | |
1193 | } | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | impl<'de> serde::Deserializer<'de> for MapRefDeserializer<'de> { | |
1198 | type Error = Error; | |
1199 | ||
1200 | #[inline] | |
1201 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
1202 | where | |
1203 | V: Visitor<'de>, | |
1204 | { | |
1205 | visitor.visit_map(self) | |
1206 | } | |
1207 | ||
1208 | forward_to_deserialize_any! { | |
1209 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
1210 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
1211 | tuple_struct map struct enum identifier ignored_any | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | struct MapKeyDeserializer<'de> { | |
1216 | key: Cow<'de, str>, | |
1217 | } | |
1218 | ||
1219 | macro_rules! deserialize_integer_key { | |
1220 | ($method:ident => $visit:ident) => { | |
1221 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
1222 | where | |
1223 | V: Visitor<'de>, | |
1224 | { | |
1225 | match (self.key.parse(), self.key) { | |
1226 | (Ok(integer), _) => visitor.$visit(integer), | |
1227 | (Err(_), Cow::Borrowed(s)) => visitor.visit_borrowed_str(s), | |
1228 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1229 | (Err(_), Cow::Owned(s)) => visitor.visit_string(s), | |
1230 | } | |
1231 | } | |
1232 | }; | |
1233 | } | |
1234 | ||
1235 | impl<'de> serde::Deserializer<'de> for MapKeyDeserializer<'de> { | |
1236 | type Error = Error; | |
1237 | ||
1238 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
1239 | where | |
1240 | V: Visitor<'de>, | |
1241 | { | |
1242 | BorrowedCowStrDeserializer::new(self.key).deserialize_any(visitor) | |
1243 | } | |
1244 | ||
1245 | deserialize_integer_key!(deserialize_i8 => visit_i8); | |
1246 | deserialize_integer_key!(deserialize_i16 => visit_i16); | |
1247 | deserialize_integer_key!(deserialize_i32 => visit_i32); | |
1248 | deserialize_integer_key!(deserialize_i64 => visit_i64); | |
1249 | deserialize_integer_key!(deserialize_u8 => visit_u8); | |
1250 | deserialize_integer_key!(deserialize_u16 => visit_u16); | |
1251 | deserialize_integer_key!(deserialize_u32 => visit_u32); | |
1252 | deserialize_integer_key!(deserialize_u64 => visit_u64); | |
1253 | ||
1254 | serde_if_integer128! { | |
1255 | deserialize_integer_key!(deserialize_i128 => visit_i128); | |
1256 | deserialize_integer_key!(deserialize_u128 => visit_u128); | |
1257 | } | |
1258 | ||
1259 | #[inline] | |
1260 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> | |
1261 | where | |
1262 | V: Visitor<'de>, | |
1263 | { | |
1264 | // Map keys cannot be null. | |
1265 | visitor.visit_some(self) | |
1266 | } | |
1267 | ||
1268 | #[inline] | |
1269 | fn deserialize_newtype_struct<V>( | |
1270 | self, | |
1271 | _name: &'static str, | |
1272 | visitor: V, | |
1273 | ) -> Result<V::Value, Error> | |
1274 | where | |
1275 | V: Visitor<'de>, | |
1276 | { | |
1277 | visitor.visit_newtype_struct(self) | |
1278 | } | |
1279 | ||
1280 | fn deserialize_enum<V>( | |
1281 | self, | |
1282 | name: &'static str, | |
1283 | variants: &'static [&'static str], | |
1284 | visitor: V, | |
1285 | ) -> Result<V::Value, Error> | |
1286 | where | |
1287 | V: Visitor<'de>, | |
1288 | { | |
1289 | self.key | |
1290 | .into_deserializer() | |
1291 | .deserialize_enum(name, variants, visitor) | |
1292 | } | |
1293 | ||
1294 | forward_to_deserialize_any! { | |
1295 | bool f32 f64 char str string bytes byte_buf unit unit_struct seq tuple | |
1296 | tuple_struct map struct identifier ignored_any | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | struct KeyClassifier; | |
1301 | ||
1302 | enum KeyClass { | |
1303 | Map(String), | |
1304 | #[cfg(feature = "arbitrary_precision")] | |
1305 | Number, | |
1306 | #[cfg(feature = "raw_value")] | |
1307 | RawValue, | |
1308 | } | |
1309 | ||
1310 | impl<'de> DeserializeSeed<'de> for KeyClassifier { | |
1311 | type Value = KeyClass; | |
1312 | ||
1313 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
1314 | where | |
1315 | D: serde::Deserializer<'de>, | |
1316 | { | |
1317 | deserializer.deserialize_str(self) | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | impl<'de> Visitor<'de> for KeyClassifier { | |
1322 | type Value = KeyClass; | |
1323 | ||
1324 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1325 | formatter.write_str("a string key") | |
1326 | } | |
1327 | ||
1328 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
1329 | where | |
1330 | E: de::Error, | |
1331 | { | |
1332 | match s { | |
1333 | #[cfg(feature = "arbitrary_precision")] | |
1334 | crate::number::TOKEN => Ok(KeyClass::Number), | |
1335 | #[cfg(feature = "raw_value")] | |
1336 | crate::raw::TOKEN => Ok(KeyClass::RawValue), | |
1337 | _ => Ok(KeyClass::Map(s.to_owned())), | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1342 | fn visit_string<E>(self, s: String) -> Result<Self::Value, E> | |
1343 | where | |
1344 | E: de::Error, | |
1345 | { | |
1346 | match s.as_str() { | |
1347 | #[cfg(feature = "arbitrary_precision")] | |
1348 | crate::number::TOKEN => Ok(KeyClass::Number), | |
1349 | #[cfg(feature = "raw_value")] | |
1350 | crate::raw::TOKEN => Ok(KeyClass::RawValue), | |
1351 | _ => Ok(KeyClass::Map(s)), | |
1352 | } | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | impl Value { | |
1357 | #[cold] | |
1358 | fn invalid_type<E>(&self, exp: &dyn Expected) -> E | |
1359 | where | |
1360 | E: serde::de::Error, | |
1361 | { | |
1362 | serde::de::Error::invalid_type(self.unexpected(), exp) | |
1363 | } | |
1364 | ||
1365 | #[cold] | |
1366 | fn unexpected(&self) -> Unexpected { | |
1367 | match *self { | |
1368 | Value::Null => Unexpected::Unit, | |
1369 | Value::Bool(b) => Unexpected::Bool(b), | |
1370 | Value::Number(ref n) => n.unexpected(), | |
1371 | Value::String(ref s) => Unexpected::Str(s), | |
1372 | Value::Array(_) => Unexpected::Seq, | |
1373 | Value::Object(_) => Unexpected::Map, | |
1374 | } | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | struct BorrowedCowStrDeserializer<'de> { | |
1379 | value: Cow<'de, str>, | |
1380 | } | |
1381 | ||
1382 | impl<'de> BorrowedCowStrDeserializer<'de> { | |
1383 | fn new(value: Cow<'de, str>) -> Self { | |
1384 | BorrowedCowStrDeserializer { value } | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | impl<'de> de::Deserializer<'de> for BorrowedCowStrDeserializer<'de> { | |
1389 | type Error = Error; | |
1390 | ||
1391 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
1392 | where | |
1393 | V: de::Visitor<'de>, | |
1394 | { | |
1395 | match self.value { | |
1396 | Cow::Borrowed(string) => visitor.visit_borrowed_str(string), | |
1397 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1398 | Cow::Owned(string) => visitor.visit_string(string), | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | fn deserialize_enum<V>( | |
1403 | self, | |
1404 | _name: &str, | |
1405 | _variants: &'static [&'static str], | |
1406 | visitor: V, | |
1407 | ) -> Result<V::Value, Error> | |
1408 | where | |
1409 | V: de::Visitor<'de>, | |
1410 | { | |
1411 | visitor.visit_enum(self) | |
1412 | } | |
1413 | ||
1414 | forward_to_deserialize_any! { | |
1415 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
1416 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
1417 | tuple_struct map struct identifier ignored_any | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | impl<'de> de::EnumAccess<'de> for BorrowedCowStrDeserializer<'de> { | |
1422 | type Error = Error; | |
1423 | type Variant = UnitOnly; | |
1424 | ||
1425 | fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Error> | |
1426 | where | |
1427 | T: de::DeserializeSeed<'de>, | |
1428 | { | |
1429 | let value = seed.deserialize(self)?; | |
1430 | Ok((value, UnitOnly)) | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | struct UnitOnly; | |
1435 | ||
1436 | impl<'de> de::VariantAccess<'de> for UnitOnly { | |
1437 | type Error = Error; | |
1438 | ||
1439 | fn unit_variant(self) -> Result<(), Error> { | |
1440 | Ok(()) | |
1441 | } | |
1442 | ||
1443 | fn newtype_variant_seed<T>(self, _seed: T) -> Result<T::Value, Error> | |
1444 | where | |
1445 | T: de::DeserializeSeed<'de>, | |
1446 | { | |
1447 | Err(de::Error::invalid_type( | |
1448 | Unexpected::UnitVariant, | |
1449 | &"newtype variant", | |
1450 | )) | |
1451 | } | |
1452 | ||
1453 | fn tuple_variant<V>(self, _len: usize, _visitor: V) -> Result<V::Value, Error> | |
1454 | where | |
1455 | V: de::Visitor<'de>, | |
1456 | { | |
1457 | Err(de::Error::invalid_type( | |
1458 | Unexpected::UnitVariant, | |
1459 | &"tuple variant", | |
1460 | )) | |
1461 | } | |
1462 | ||
1463 | fn struct_variant<V>( | |
1464 | self, | |
1465 | _fields: &'static [&'static str], | |
1466 | _visitor: V, | |
1467 | ) -> Result<V::Value, Error> | |
1468 | where | |
1469 | V: de::Visitor<'de>, | |
1470 | { | |
1471 | Err(de::Error::invalid_type( | |
1472 | Unexpected::UnitVariant, | |
1473 | &"struct variant", | |
1474 | )) | |
1475 | } | |
1476 | } |