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1 | // Copyright 2017 Serde Developers |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
4 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
5 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
6 | // option. This file may not be copied, modified, or distributed | |
7 | // except according to those terms. | |
8 | ||
9 | use std::borrow::Cow; | |
10 | use std::fmt; | |
041b39d2 XL |
11 | use std::slice; |
12 | use std::str; | |
13 | use std::vec; | |
14 | ||
15 | use serde; | |
8faf50e0 XL |
16 | use serde::de::{ |
17 | Deserialize, DeserializeSeed, EnumAccess, Expected, IntoDeserializer, MapAccess, SeqAccess, | |
18 | Unexpected, VariantAccess, Visitor, | |
19 | }; | |
041b39d2 XL |
20 | |
21 | use error::Error; | |
22 | use map::Map; | |
23 | use number::Number; | |
24 | use value::Value; | |
25 | ||
0531ce1d XL |
26 | use serde::de; |
27 | ||
28 | #[cfg(feature = "arbitrary_precision")] | |
0bf4aa26 | 29 | use number::NumberFromString; |
0531ce1d | 30 | |
041b39d2 XL |
31 | impl<'de> Deserialize<'de> for Value { |
32 | #[inline] | |
33 | fn deserialize<D>(deserializer: D) -> Result<Value, D::Error> | |
34 | where | |
35 | D: serde::Deserializer<'de>, | |
36 | { | |
37 | struct ValueVisitor; | |
38 | ||
39 | impl<'de> Visitor<'de> for ValueVisitor { | |
40 | type Value = Value; | |
41 | ||
42 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
43 | formatter.write_str("any valid JSON value") | |
44 | } | |
45 | ||
46 | #[inline] | |
47 | fn visit_bool<E>(self, value: bool) -> Result<Value, E> { | |
48 | Ok(Value::Bool(value)) | |
49 | } | |
50 | ||
51 | #[inline] | |
52 | fn visit_i64<E>(self, value: i64) -> Result<Value, E> { | |
53 | Ok(Value::Number(value.into())) | |
54 | } | |
55 | ||
56 | #[inline] | |
57 | fn visit_u64<E>(self, value: u64) -> Result<Value, E> { | |
58 | Ok(Value::Number(value.into())) | |
59 | } | |
60 | ||
61 | #[inline] | |
62 | fn visit_f64<E>(self, value: f64) -> Result<Value, E> { | |
63 | Ok(Number::from_f64(value).map_or(Value::Null, Value::Number)) | |
64 | } | |
65 | ||
66 | #[inline] | |
67 | fn visit_str<E>(self, value: &str) -> Result<Value, E> | |
68 | where | |
69 | E: serde::de::Error, | |
70 | { | |
71 | self.visit_string(String::from(value)) | |
72 | } | |
73 | ||
74 | #[inline] | |
75 | fn visit_string<E>(self, value: String) -> Result<Value, E> { | |
76 | Ok(Value::String(value)) | |
77 | } | |
78 | ||
79 | #[inline] | |
80 | fn visit_none<E>(self) -> Result<Value, E> { | |
81 | Ok(Value::Null) | |
82 | } | |
83 | ||
84 | #[inline] | |
85 | fn visit_some<D>(self, deserializer: D) -> Result<Value, D::Error> | |
86 | where | |
87 | D: serde::Deserializer<'de>, | |
88 | { | |
89 | Deserialize::deserialize(deserializer) | |
90 | } | |
91 | ||
92 | #[inline] | |
93 | fn visit_unit<E>(self) -> Result<Value, E> { | |
94 | Ok(Value::Null) | |
95 | } | |
96 | ||
97 | #[inline] | |
98 | fn visit_seq<V>(self, mut visitor: V) -> Result<Value, V::Error> | |
99 | where | |
100 | V: SeqAccess<'de>, | |
101 | { | |
102 | let mut vec = Vec::new(); | |
103 | ||
104 | while let Some(elem) = try!(visitor.next_element()) { | |
105 | vec.push(elem); | |
106 | } | |
107 | ||
108 | Ok(Value::Array(vec)) | |
109 | } | |
110 | ||
0531ce1d XL |
111 | fn visit_map<V>(self, mut visitor: V) -> Result<Value, V::Error> |
112 | where | |
113 | V: MapAccess<'de>, | |
114 | { | |
0bf4aa26 XL |
115 | match visitor.next_key_seed(KeyClassifier)? { |
116 | #[cfg(feature = "arbitrary_precision")] | |
117 | Some(KeyClass::Number) => { | |
0531ce1d | 118 | let number: NumberFromString = visitor.next_value()?; |
0bf4aa26 | 119 | Ok(Value::Number(number.value)) |
0531ce1d | 120 | } |
0bf4aa26 XL |
121 | #[cfg(feature = "raw_value")] |
122 | Some(KeyClass::RawValue) => { | |
123 | let value = visitor.next_value_seed(::raw::BoxedFromString)?; | |
124 | ::from_str(value.get()).map_err(de::Error::custom) | |
125 | } | |
126 | Some(KeyClass::Map(first_key)) => { | |
127 | let mut values = Map::new(); | |
0531ce1d | 128 | |
0bf4aa26 XL |
129 | values.insert(first_key, try!(visitor.next_value())); |
130 | while let Some((key, value)) = try!(visitor.next_entry()) { | |
131 | values.insert(key, value); | |
132 | } | |
0531ce1d | 133 | |
0bf4aa26 XL |
134 | Ok(Value::Object(values)) |
135 | } | |
136 | None => Ok(Value::Object(Map::new())), | |
0531ce1d | 137 | } |
0531ce1d | 138 | } |
041b39d2 XL |
139 | } |
140 | ||
141 | deserializer.deserialize_any(ValueVisitor) | |
142 | } | |
143 | } | |
144 | ||
041b39d2 XL |
145 | impl str::FromStr for Value { |
146 | type Err = Error; | |
147 | fn from_str(s: &str) -> Result<Value, Error> { | |
148 | super::super::de::from_str(s) | |
149 | } | |
150 | } | |
151 | ||
0531ce1d XL |
152 | macro_rules! deserialize_prim_number { |
153 | ($method:ident) => { | |
154 | #[cfg(not(feature = "arbitrary_precision"))] | |
155 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
156 | where | |
157 | V: Visitor<'de>, | |
158 | { | |
83c7162d XL |
159 | match self { |
160 | Value::Number(n) => n.deserialize_any(visitor), | |
161 | _ => Err(self.invalid_type(&visitor)), | |
162 | } | |
0531ce1d XL |
163 | } |
164 | ||
165 | #[cfg(feature = "arbitrary_precision")] | |
166 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
167 | where | |
168 | V: Visitor<'de>, | |
169 | { | |
170 | match self { | |
171 | Value::Number(n) => n.$method(visitor), | |
172 | _ => self.deserialize_any(visitor), | |
173 | } | |
174 | } | |
175 | } | |
176 | } | |
177 | ||
83c7162d XL |
178 | fn visit_array<'de, V>(array: Vec<Value>, visitor: V) -> Result<V::Value, Error> |
179 | where | |
180 | V: Visitor<'de>, | |
181 | { | |
182 | let len = array.len(); | |
183 | let mut deserializer = SeqDeserializer::new(array); | |
184 | let seq = try!(visitor.visit_seq(&mut deserializer)); | |
185 | let remaining = deserializer.iter.len(); | |
186 | if remaining == 0 { | |
187 | Ok(seq) | |
188 | } else { | |
189 | Err(serde::de::Error::invalid_length( | |
190 | len, | |
191 | &"fewer elements in array", | |
192 | )) | |
193 | } | |
194 | } | |
195 | ||
196 | fn visit_object<'de, V>(object: Map<String, Value>, visitor: V) -> Result<V::Value, Error> | |
197 | where | |
198 | V: Visitor<'de>, | |
199 | { | |
200 | let len = object.len(); | |
201 | let mut deserializer = MapDeserializer::new(object); | |
202 | let map = try!(visitor.visit_map(&mut deserializer)); | |
203 | let remaining = deserializer.iter.len(); | |
204 | if remaining == 0 { | |
205 | Ok(map) | |
206 | } else { | |
207 | Err(serde::de::Error::invalid_length( | |
208 | len, | |
209 | &"fewer elements in map", | |
210 | )) | |
211 | } | |
212 | } | |
213 | ||
041b39d2 XL |
214 | impl<'de> serde::Deserializer<'de> for Value { |
215 | type Error = Error; | |
216 | ||
217 | #[inline] | |
218 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
219 | where | |
220 | V: Visitor<'de>, | |
221 | { | |
222 | match self { | |
223 | Value::Null => visitor.visit_unit(), | |
224 | Value::Bool(v) => visitor.visit_bool(v), | |
225 | Value::Number(n) => n.deserialize_any(visitor), | |
226 | Value::String(v) => visitor.visit_string(v), | |
83c7162d XL |
227 | Value::Array(v) => visit_array(v, visitor), |
228 | Value::Object(v) => visit_object(v, visitor), | |
041b39d2 XL |
229 | } |
230 | } | |
231 | ||
0531ce1d XL |
232 | deserialize_prim_number!(deserialize_i8); |
233 | deserialize_prim_number!(deserialize_i16); | |
234 | deserialize_prim_number!(deserialize_i32); | |
235 | deserialize_prim_number!(deserialize_i64); | |
236 | deserialize_prim_number!(deserialize_u8); | |
237 | deserialize_prim_number!(deserialize_u16); | |
238 | deserialize_prim_number!(deserialize_u32); | |
239 | deserialize_prim_number!(deserialize_u64); | |
240 | deserialize_prim_number!(deserialize_f32); | |
241 | deserialize_prim_number!(deserialize_f64); | |
242 | ||
8faf50e0 XL |
243 | serde_if_integer128! { |
244 | deserialize_prim_number!(deserialize_i128); | |
245 | deserialize_prim_number!(deserialize_u128); | |
246 | } | |
247 | ||
041b39d2 XL |
248 | #[inline] |
249 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> | |
250 | where | |
251 | V: Visitor<'de>, | |
252 | { | |
253 | match self { | |
254 | Value::Null => visitor.visit_none(), | |
255 | _ => visitor.visit_some(self), | |
256 | } | |
257 | } | |
258 | ||
259 | #[inline] | |
260 | fn deserialize_enum<V>( | |
261 | self, | |
262 | _name: &str, | |
263 | _variants: &'static [&'static str], | |
264 | visitor: V, | |
265 | ) -> Result<V::Value, Error> | |
266 | where | |
267 | V: Visitor<'de>, | |
268 | { | |
269 | let (variant, value) = match self { | |
270 | Value::Object(value) => { | |
271 | let mut iter = value.into_iter(); | |
272 | let (variant, value) = match iter.next() { | |
273 | Some(v) => v, | |
274 | None => { | |
83c7162d XL |
275 | return Err(serde::de::Error::invalid_value( |
276 | Unexpected::Map, | |
277 | &"map with a single key", | |
278 | )); | |
041b39d2 XL |
279 | } |
280 | }; | |
281 | // enums are encoded in json as maps with a single key:value pair | |
282 | if iter.next().is_some() { | |
83c7162d XL |
283 | return Err(serde::de::Error::invalid_value( |
284 | Unexpected::Map, | |
285 | &"map with a single key", | |
286 | )); | |
041b39d2 XL |
287 | } |
288 | (variant, Some(value)) | |
289 | } | |
290 | Value::String(variant) => (variant, None), | |
291 | other => { | |
83c7162d XL |
292 | return Err(serde::de::Error::invalid_type( |
293 | other.unexpected(), | |
294 | &"string or map", | |
295 | )); | |
041b39d2 XL |
296 | } |
297 | }; | |
298 | ||
83c7162d XL |
299 | visitor.visit_enum(EnumDeserializer { |
300 | variant: variant, | |
301 | value: value, | |
302 | }) | |
041b39d2 XL |
303 | } |
304 | ||
305 | #[inline] | |
306 | fn deserialize_newtype_struct<V>( | |
307 | self, | |
0bf4aa26 | 308 | name: &'static str, |
041b39d2 XL |
309 | visitor: V, |
310 | ) -> Result<V::Value, Self::Error> | |
311 | where | |
312 | V: Visitor<'de>, | |
313 | { | |
0bf4aa26 XL |
314 | #[cfg(feature = "raw_value")] |
315 | { | |
316 | if name == ::raw::TOKEN { | |
317 | return visitor.visit_map(::raw::OwnedRawDeserializer { | |
318 | raw_value: Some(self.to_string()), | |
319 | }); | |
320 | } | |
321 | } | |
322 | ||
323 | let _ = name; | |
041b39d2 XL |
324 | visitor.visit_newtype_struct(self) |
325 | } | |
326 | ||
83c7162d XL |
327 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
328 | where | |
329 | V: Visitor<'de>, | |
330 | { | |
331 | match self { | |
332 | Value::Bool(v) => visitor.visit_bool(v), | |
333 | _ => Err(self.invalid_type(&visitor)), | |
334 | } | |
335 | } | |
336 | ||
337 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
338 | where | |
339 | V: Visitor<'de>, | |
340 | { | |
341 | self.deserialize_string(visitor) | |
342 | } | |
343 | ||
344 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
345 | where | |
346 | V: Visitor<'de>, | |
347 | { | |
348 | self.deserialize_string(visitor) | |
349 | } | |
350 | ||
351 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
352 | where | |
353 | V: Visitor<'de>, | |
354 | { | |
355 | match self { | |
356 | Value::String(v) => visitor.visit_string(v), | |
357 | _ => Err(self.invalid_type(&visitor)), | |
358 | } | |
359 | } | |
360 | ||
361 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
362 | where | |
363 | V: Visitor<'de>, | |
364 | { | |
365 | self.deserialize_byte_buf(visitor) | |
366 | } | |
367 | ||
368 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
369 | where | |
370 | V: Visitor<'de>, | |
371 | { | |
372 | match self { | |
373 | Value::String(v) => visitor.visit_string(v), | |
374 | Value::Array(v) => visit_array(v, visitor), | |
375 | _ => Err(self.invalid_type(&visitor)), | |
376 | } | |
377 | } | |
378 | ||
379 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
380 | where | |
381 | V: Visitor<'de>, | |
382 | { | |
383 | match self { | |
384 | Value::Null => visitor.visit_unit(), | |
385 | _ => Err(self.invalid_type(&visitor)), | |
386 | } | |
387 | } | |
388 | ||
389 | fn deserialize_unit_struct<V>( | |
390 | self, | |
391 | _name: &'static str, | |
392 | visitor: V, | |
393 | ) -> Result<V::Value, Self::Error> | |
394 | where | |
395 | V: Visitor<'de>, | |
396 | { | |
397 | self.deserialize_unit(visitor) | |
398 | } | |
399 | ||
400 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
401 | where | |
402 | V: Visitor<'de>, | |
403 | { | |
404 | match self { | |
405 | Value::Array(v) => visit_array(v, visitor), | |
406 | _ => Err(self.invalid_type(&visitor)), | |
407 | } | |
408 | } | |
409 | ||
410 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
411 | where | |
412 | V: Visitor<'de>, | |
413 | { | |
414 | self.deserialize_seq(visitor) | |
415 | } | |
416 | ||
417 | fn deserialize_tuple_struct<V>( | |
418 | self, | |
419 | _name: &'static str, | |
420 | _len: usize, | |
421 | visitor: V, | |
422 | ) -> Result<V::Value, Self::Error> | |
423 | where | |
424 | V: Visitor<'de>, | |
425 | { | |
426 | self.deserialize_seq(visitor) | |
427 | } | |
428 | ||
429 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
430 | where | |
431 | V: Visitor<'de>, | |
432 | { | |
433 | match self { | |
434 | Value::Object(v) => visit_object(v, visitor), | |
435 | _ => Err(self.invalid_type(&visitor)), | |
436 | } | |
437 | } | |
438 | ||
439 | fn deserialize_struct<V>( | |
440 | self, | |
441 | _name: &'static str, | |
442 | _fields: &'static [&'static str], | |
443 | visitor: V, | |
444 | ) -> Result<V::Value, Self::Error> | |
445 | where | |
446 | V: Visitor<'de>, | |
447 | { | |
448 | match self { | |
449 | Value::Array(v) => visit_array(v, visitor), | |
450 | Value::Object(v) => visit_object(v, visitor), | |
451 | _ => Err(self.invalid_type(&visitor)), | |
452 | } | |
453 | } | |
454 | ||
455 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
456 | where | |
457 | V: Visitor<'de>, | |
458 | { | |
459 | self.deserialize_string(visitor) | |
460 | } | |
461 | ||
462 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
463 | where | |
464 | V: Visitor<'de>, | |
465 | { | |
466 | drop(self); | |
467 | visitor.visit_unit() | |
041b39d2 XL |
468 | } |
469 | } | |
470 | ||
471 | struct EnumDeserializer { | |
472 | variant: String, | |
473 | value: Option<Value>, | |
474 | } | |
475 | ||
476 | impl<'de> EnumAccess<'de> for EnumDeserializer { | |
477 | type Error = Error; | |
478 | type Variant = VariantDeserializer; | |
479 | ||
480 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, VariantDeserializer), Error> | |
481 | where | |
482 | V: DeserializeSeed<'de>, | |
483 | { | |
484 | let variant = self.variant.into_deserializer(); | |
485 | let visitor = VariantDeserializer { value: self.value }; | |
486 | seed.deserialize(variant).map(|v| (v, visitor)) | |
487 | } | |
488 | } | |
489 | ||
490 | struct VariantDeserializer { | |
491 | value: Option<Value>, | |
492 | } | |
493 | ||
494 | impl<'de> VariantAccess<'de> for VariantDeserializer { | |
495 | type Error = Error; | |
496 | ||
497 | fn unit_variant(self) -> Result<(), Error> { | |
498 | match self.value { | |
499 | Some(value) => Deserialize::deserialize(value), | |
500 | None => Ok(()), | |
501 | } | |
502 | } | |
503 | ||
504 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> | |
505 | where | |
506 | T: DeserializeSeed<'de>, | |
507 | { | |
508 | match self.value { | |
509 | Some(value) => seed.deserialize(value), | |
83c7162d XL |
510 | None => Err(serde::de::Error::invalid_type( |
511 | Unexpected::UnitVariant, | |
512 | &"newtype variant", | |
513 | )), | |
041b39d2 XL |
514 | } |
515 | } | |
516 | ||
517 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
518 | where | |
519 | V: Visitor<'de>, | |
520 | { | |
521 | match self.value { | |
522 | Some(Value::Array(v)) => { | |
523 | serde::Deserializer::deserialize_any(SeqDeserializer::new(v), visitor) | |
524 | } | |
83c7162d XL |
525 | Some(other) => Err(serde::de::Error::invalid_type( |
526 | other.unexpected(), | |
527 | &"tuple variant", | |
528 | )), | |
529 | None => Err(serde::de::Error::invalid_type( | |
530 | Unexpected::UnitVariant, | |
531 | &"tuple variant", | |
532 | )), | |
041b39d2 XL |
533 | } |
534 | } | |
535 | ||
536 | fn struct_variant<V>( | |
537 | self, | |
538 | _fields: &'static [&'static str], | |
539 | visitor: V, | |
540 | ) -> Result<V::Value, Error> | |
541 | where | |
542 | V: Visitor<'de>, | |
543 | { | |
544 | match self.value { | |
545 | Some(Value::Object(v)) => { | |
546 | serde::Deserializer::deserialize_any(MapDeserializer::new(v), visitor) | |
547 | } | |
83c7162d XL |
548 | Some(other) => Err(serde::de::Error::invalid_type( |
549 | other.unexpected(), | |
550 | &"struct variant", | |
551 | )), | |
552 | _ => Err(serde::de::Error::invalid_type( | |
553 | Unexpected::UnitVariant, | |
554 | &"struct variant", | |
555 | )), | |
041b39d2 XL |
556 | } |
557 | } | |
558 | } | |
559 | ||
560 | struct SeqDeserializer { | |
561 | iter: vec::IntoIter<Value>, | |
562 | } | |
563 | ||
564 | impl SeqDeserializer { | |
565 | fn new(vec: Vec<Value>) -> Self { | |
83c7162d XL |
566 | SeqDeserializer { |
567 | iter: vec.into_iter(), | |
568 | } | |
041b39d2 XL |
569 | } |
570 | } | |
571 | ||
572 | impl<'de> serde::Deserializer<'de> for SeqDeserializer { | |
573 | type Error = Error; | |
574 | ||
575 | #[inline] | |
576 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Error> | |
577 | where | |
578 | V: Visitor<'de>, | |
579 | { | |
580 | let len = self.iter.len(); | |
581 | if len == 0 { | |
582 | visitor.visit_unit() | |
583 | } else { | |
584 | let ret = try!(visitor.visit_seq(&mut self)); | |
585 | let remaining = self.iter.len(); | |
586 | if remaining == 0 { | |
587 | Ok(ret) | |
588 | } else { | |
83c7162d XL |
589 | Err(serde::de::Error::invalid_length( |
590 | len, | |
591 | &"fewer elements in array", | |
592 | )) | |
041b39d2 XL |
593 | } |
594 | } | |
595 | } | |
596 | ||
597 | forward_to_deserialize_any! { | |
8faf50e0 XL |
598 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
599 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
600 | tuple_struct map struct enum identifier ignored_any |
601 | } | |
602 | } | |
603 | ||
604 | impl<'de> SeqAccess<'de> for SeqDeserializer { | |
605 | type Error = Error; | |
606 | ||
607 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
608 | where | |
609 | T: DeserializeSeed<'de>, | |
610 | { | |
611 | match self.iter.next() { | |
612 | Some(value) => seed.deserialize(value).map(Some), | |
613 | None => Ok(None), | |
614 | } | |
615 | } | |
616 | ||
617 | fn size_hint(&self) -> Option<usize> { | |
618 | match self.iter.size_hint() { | |
619 | (lower, Some(upper)) if lower == upper => Some(upper), | |
620 | _ => None, | |
621 | } | |
622 | } | |
623 | } | |
624 | ||
625 | struct MapDeserializer { | |
626 | iter: <Map<String, Value> as IntoIterator>::IntoIter, | |
627 | value: Option<Value>, | |
628 | } | |
629 | ||
630 | impl MapDeserializer { | |
631 | fn new(map: Map<String, Value>) -> Self { | |
632 | MapDeserializer { | |
633 | iter: map.into_iter(), | |
634 | value: None, | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | impl<'de> MapAccess<'de> for MapDeserializer { | |
640 | type Error = Error; | |
641 | ||
642 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
643 | where | |
644 | T: DeserializeSeed<'de>, | |
645 | { | |
646 | match self.iter.next() { | |
647 | Some((key, value)) => { | |
648 | self.value = Some(value); | |
83c7162d XL |
649 | let key_de = MapKeyDeserializer { |
650 | key: Cow::Owned(key), | |
651 | }; | |
041b39d2 XL |
652 | seed.deserialize(key_de).map(Some) |
653 | } | |
654 | None => Ok(None), | |
655 | } | |
656 | } | |
657 | ||
658 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> | |
659 | where | |
660 | T: DeserializeSeed<'de>, | |
661 | { | |
662 | match self.value.take() { | |
663 | Some(value) => seed.deserialize(value), | |
664 | None => Err(serde::de::Error::custom("value is missing")), | |
665 | } | |
666 | } | |
667 | ||
668 | fn size_hint(&self) -> Option<usize> { | |
669 | match self.iter.size_hint() { | |
670 | (lower, Some(upper)) if lower == upper => Some(upper), | |
671 | _ => None, | |
672 | } | |
673 | } | |
674 | } | |
675 | ||
676 | impl<'de> serde::Deserializer<'de> for MapDeserializer { | |
677 | type Error = Error; | |
678 | ||
679 | #[inline] | |
680 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
681 | where | |
682 | V: Visitor<'de>, | |
683 | { | |
684 | visitor.visit_map(self) | |
685 | } | |
686 | ||
687 | forward_to_deserialize_any! { | |
8faf50e0 XL |
688 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
689 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
690 | tuple_struct map struct enum identifier ignored_any |
691 | } | |
692 | } | |
693 | ||
0531ce1d XL |
694 | macro_rules! deserialize_value_ref_number { |
695 | ($method:ident) => { | |
696 | #[cfg(not(feature = "arbitrary_precision"))] | |
697 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
698 | where | |
699 | V: Visitor<'de>, | |
700 | { | |
83c7162d XL |
701 | match *self { |
702 | Value::Number(ref n) => n.deserialize_any(visitor), | |
703 | _ => Err(self.invalid_type(&visitor)), | |
704 | } | |
0531ce1d XL |
705 | } |
706 | ||
707 | #[cfg(feature = "arbitrary_precision")] | |
708 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
709 | where | |
710 | V: Visitor<'de>, | |
711 | { | |
712 | match *self { | |
713 | Value::Number(ref n) => n.$method(visitor), | |
714 | _ => self.deserialize_any(visitor), | |
715 | } | |
716 | } | |
717 | } | |
718 | } | |
719 | ||
83c7162d XL |
720 | fn visit_array_ref<'de, V>(array: &'de [Value], visitor: V) -> Result<V::Value, Error> |
721 | where | |
722 | V: Visitor<'de>, | |
723 | { | |
724 | let len = array.len(); | |
725 | let mut deserializer = SeqRefDeserializer::new(array); | |
726 | let seq = try!(visitor.visit_seq(&mut deserializer)); | |
727 | let remaining = deserializer.iter.len(); | |
728 | if remaining == 0 { | |
729 | Ok(seq) | |
730 | } else { | |
731 | Err(serde::de::Error::invalid_length( | |
732 | len, | |
733 | &"fewer elements in array", | |
734 | )) | |
735 | } | |
736 | } | |
737 | ||
738 | fn visit_object_ref<'de, V>(object: &'de Map<String, Value>, visitor: V) -> Result<V::Value, Error> | |
739 | where | |
740 | V: Visitor<'de>, | |
741 | { | |
742 | let len = object.len(); | |
743 | let mut deserializer = MapRefDeserializer::new(object); | |
744 | let map = try!(visitor.visit_map(&mut deserializer)); | |
745 | let remaining = deserializer.iter.len(); | |
746 | if remaining == 0 { | |
747 | Ok(map) | |
748 | } else { | |
749 | Err(serde::de::Error::invalid_length( | |
750 | len, | |
751 | &"fewer elements in map", | |
752 | )) | |
753 | } | |
754 | } | |
755 | ||
041b39d2 XL |
756 | impl<'de> serde::Deserializer<'de> for &'de Value { |
757 | type Error = Error; | |
758 | ||
759 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
760 | where | |
761 | V: Visitor<'de>, | |
762 | { | |
763 | match *self { | |
764 | Value::Null => visitor.visit_unit(), | |
765 | Value::Bool(v) => visitor.visit_bool(v), | |
766 | Value::Number(ref n) => n.deserialize_any(visitor), | |
767 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
83c7162d XL |
768 | Value::Array(ref v) => visit_array_ref(v, visitor), |
769 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
041b39d2 XL |
770 | } |
771 | } | |
772 | ||
0531ce1d XL |
773 | deserialize_value_ref_number!(deserialize_i8); |
774 | deserialize_value_ref_number!(deserialize_i16); | |
775 | deserialize_value_ref_number!(deserialize_i32); | |
776 | deserialize_value_ref_number!(deserialize_i64); | |
777 | deserialize_value_ref_number!(deserialize_u8); | |
778 | deserialize_value_ref_number!(deserialize_u16); | |
779 | deserialize_value_ref_number!(deserialize_u32); | |
780 | deserialize_value_ref_number!(deserialize_u64); | |
781 | deserialize_value_ref_number!(deserialize_f32); | |
782 | deserialize_value_ref_number!(deserialize_f64); | |
783 | ||
8faf50e0 XL |
784 | serde_if_integer128! { |
785 | deserialize_prim_number!(deserialize_i128); | |
786 | deserialize_prim_number!(deserialize_u128); | |
787 | } | |
788 | ||
041b39d2 XL |
789 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> |
790 | where | |
791 | V: Visitor<'de>, | |
792 | { | |
793 | match *self { | |
794 | Value::Null => visitor.visit_none(), | |
795 | _ => visitor.visit_some(self), | |
796 | } | |
797 | } | |
798 | ||
799 | fn deserialize_enum<V>( | |
800 | self, | |
801 | _name: &str, | |
802 | _variants: &'static [&'static str], | |
803 | visitor: V, | |
804 | ) -> Result<V::Value, Error> | |
805 | where | |
806 | V: Visitor<'de>, | |
807 | { | |
808 | let (variant, value) = match *self { | |
809 | Value::Object(ref value) => { | |
810 | let mut iter = value.into_iter(); | |
811 | let (variant, value) = match iter.next() { | |
812 | Some(v) => v, | |
813 | None => { | |
83c7162d XL |
814 | return Err(serde::de::Error::invalid_value( |
815 | Unexpected::Map, | |
816 | &"map with a single key", | |
817 | )); | |
041b39d2 XL |
818 | } |
819 | }; | |
820 | // enums are encoded in json as maps with a single key:value pair | |
821 | if iter.next().is_some() { | |
83c7162d XL |
822 | return Err(serde::de::Error::invalid_value( |
823 | Unexpected::Map, | |
824 | &"map with a single key", | |
825 | )); | |
041b39d2 XL |
826 | } |
827 | (variant, Some(value)) | |
828 | } | |
829 | Value::String(ref variant) => (variant, None), | |
830 | ref other => { | |
83c7162d XL |
831 | return Err(serde::de::Error::invalid_type( |
832 | other.unexpected(), | |
833 | &"string or map", | |
834 | )); | |
041b39d2 XL |
835 | } |
836 | }; | |
837 | ||
83c7162d XL |
838 | visitor.visit_enum(EnumRefDeserializer { |
839 | variant: variant, | |
840 | value: value, | |
841 | }) | |
041b39d2 XL |
842 | } |
843 | ||
844 | #[inline] | |
845 | fn deserialize_newtype_struct<V>( | |
846 | self, | |
0bf4aa26 | 847 | name: &'static str, |
041b39d2 XL |
848 | visitor: V, |
849 | ) -> Result<V::Value, Self::Error> | |
850 | where | |
851 | V: Visitor<'de>, | |
852 | { | |
0bf4aa26 XL |
853 | #[cfg(feature = "raw_value")] |
854 | { | |
855 | if name == ::raw::TOKEN { | |
856 | return visitor.visit_map(::raw::OwnedRawDeserializer { | |
857 | raw_value: Some(self.to_string()), | |
858 | }); | |
859 | } | |
860 | } | |
861 | ||
862 | let _ = name; | |
041b39d2 XL |
863 | visitor.visit_newtype_struct(self) |
864 | } | |
865 | ||
83c7162d XL |
866 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
867 | where | |
868 | V: Visitor<'de>, | |
869 | { | |
870 | match *self { | |
871 | Value::Bool(v) => visitor.visit_bool(v), | |
872 | _ => Err(self.invalid_type(&visitor)), | |
873 | } | |
874 | } | |
875 | ||
876 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
877 | where | |
878 | V: Visitor<'de>, | |
879 | { | |
880 | self.deserialize_str(visitor) | |
881 | } | |
882 | ||
883 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
884 | where | |
885 | V: Visitor<'de>, | |
886 | { | |
887 | match *self { | |
888 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
889 | _ => Err(self.invalid_type(&visitor)), | |
890 | } | |
891 | } | |
892 | ||
893 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
894 | where | |
895 | V: Visitor<'de>, | |
896 | { | |
897 | self.deserialize_str(visitor) | |
898 | } | |
899 | ||
900 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
901 | where | |
902 | V: Visitor<'de>, | |
903 | { | |
904 | match *self { | |
905 | Value::String(ref v) => visitor.visit_borrowed_str(v), | |
906 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
907 | _ => Err(self.invalid_type(&visitor)), | |
908 | } | |
909 | } | |
910 | ||
911 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
912 | where | |
913 | V: Visitor<'de>, | |
914 | { | |
915 | self.deserialize_bytes(visitor) | |
916 | } | |
917 | ||
918 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
919 | where | |
920 | V: Visitor<'de>, | |
921 | { | |
922 | match *self { | |
923 | Value::Null => visitor.visit_unit(), | |
924 | _ => Err(self.invalid_type(&visitor)), | |
925 | } | |
926 | } | |
927 | ||
928 | fn deserialize_unit_struct<V>( | |
929 | self, | |
930 | _name: &'static str, | |
931 | visitor: V, | |
932 | ) -> Result<V::Value, Self::Error> | |
933 | where | |
934 | V: Visitor<'de>, | |
935 | { | |
936 | self.deserialize_unit(visitor) | |
937 | } | |
938 | ||
939 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
940 | where | |
941 | V: Visitor<'de>, | |
942 | { | |
943 | match *self { | |
944 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
945 | _ => Err(self.invalid_type(&visitor)), | |
946 | } | |
947 | } | |
948 | ||
949 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
950 | where | |
951 | V: Visitor<'de>, | |
952 | { | |
953 | self.deserialize_seq(visitor) | |
954 | } | |
955 | ||
956 | fn deserialize_tuple_struct<V>( | |
957 | self, | |
958 | _name: &'static str, | |
959 | _len: usize, | |
960 | visitor: V, | |
961 | ) -> Result<V::Value, Self::Error> | |
962 | where | |
963 | V: Visitor<'de>, | |
964 | { | |
965 | self.deserialize_seq(visitor) | |
966 | } | |
967 | ||
968 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
969 | where | |
970 | V: Visitor<'de>, | |
971 | { | |
972 | match *self { | |
973 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
974 | _ => Err(self.invalid_type(&visitor)), | |
975 | } | |
976 | } | |
977 | ||
978 | fn deserialize_struct<V>( | |
979 | self, | |
980 | _name: &'static str, | |
981 | _fields: &'static [&'static str], | |
982 | visitor: V, | |
983 | ) -> Result<V::Value, Self::Error> | |
984 | where | |
985 | V: Visitor<'de>, | |
986 | { | |
987 | match *self { | |
988 | Value::Array(ref v) => visit_array_ref(v, visitor), | |
989 | Value::Object(ref v) => visit_object_ref(v, visitor), | |
990 | _ => Err(self.invalid_type(&visitor)), | |
991 | } | |
992 | } | |
993 | ||
994 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
995 | where | |
996 | V: Visitor<'de>, | |
997 | { | |
998 | self.deserialize_str(visitor) | |
999 | } | |
1000 | ||
1001 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1002 | where | |
1003 | V: Visitor<'de>, | |
1004 | { | |
1005 | visitor.visit_unit() | |
041b39d2 XL |
1006 | } |
1007 | } | |
1008 | ||
1009 | struct EnumRefDeserializer<'de> { | |
1010 | variant: &'de str, | |
1011 | value: Option<&'de Value>, | |
1012 | } | |
1013 | ||
1014 | impl<'de> EnumAccess<'de> for EnumRefDeserializer<'de> { | |
1015 | type Error = Error; | |
1016 | type Variant = VariantRefDeserializer<'de>; | |
1017 | ||
1018 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Error> | |
1019 | where | |
1020 | V: DeserializeSeed<'de>, | |
1021 | { | |
1022 | let variant = self.variant.into_deserializer(); | |
1023 | let visitor = VariantRefDeserializer { value: self.value }; | |
1024 | seed.deserialize(variant).map(|v| (v, visitor)) | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | struct VariantRefDeserializer<'de> { | |
1029 | value: Option<&'de Value>, | |
1030 | } | |
1031 | ||
1032 | impl<'de> VariantAccess<'de> for VariantRefDeserializer<'de> { | |
1033 | type Error = Error; | |
1034 | ||
1035 | fn unit_variant(self) -> Result<(), Error> { | |
1036 | match self.value { | |
1037 | Some(value) => Deserialize::deserialize(value), | |
1038 | None => Ok(()), | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error> | |
1043 | where | |
1044 | T: DeserializeSeed<'de>, | |
1045 | { | |
1046 | match self.value { | |
1047 | Some(value) => seed.deserialize(value), | |
83c7162d XL |
1048 | None => Err(serde::de::Error::invalid_type( |
1049 | Unexpected::UnitVariant, | |
1050 | &"newtype variant", | |
1051 | )), | |
041b39d2 XL |
1052 | } |
1053 | } | |
1054 | ||
1055 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Error> | |
1056 | where | |
1057 | V: Visitor<'de>, | |
1058 | { | |
1059 | match self.value { | |
1060 | Some(&Value::Array(ref v)) => { | |
1061 | serde::Deserializer::deserialize_any(SeqRefDeserializer::new(v), visitor) | |
1062 | } | |
83c7162d XL |
1063 | Some(other) => Err(serde::de::Error::invalid_type( |
1064 | other.unexpected(), | |
1065 | &"tuple variant", | |
1066 | )), | |
1067 | None => Err(serde::de::Error::invalid_type( | |
1068 | Unexpected::UnitVariant, | |
1069 | &"tuple variant", | |
1070 | )), | |
041b39d2 XL |
1071 | } |
1072 | } | |
1073 | ||
1074 | fn struct_variant<V>( | |
1075 | self, | |
1076 | _fields: &'static [&'static str], | |
1077 | visitor: V, | |
1078 | ) -> Result<V::Value, Error> | |
1079 | where | |
1080 | V: Visitor<'de>, | |
1081 | { | |
1082 | match self.value { | |
1083 | Some(&Value::Object(ref v)) => { | |
1084 | serde::Deserializer::deserialize_any(MapRefDeserializer::new(v), visitor) | |
1085 | } | |
83c7162d XL |
1086 | Some(other) => Err(serde::de::Error::invalid_type( |
1087 | other.unexpected(), | |
1088 | &"struct variant", | |
1089 | )), | |
1090 | _ => Err(serde::de::Error::invalid_type( | |
1091 | Unexpected::UnitVariant, | |
1092 | &"struct variant", | |
1093 | )), | |
041b39d2 XL |
1094 | } |
1095 | } | |
1096 | } | |
1097 | ||
1098 | struct SeqRefDeserializer<'de> { | |
1099 | iter: slice::Iter<'de, Value>, | |
1100 | } | |
1101 | ||
1102 | impl<'de> SeqRefDeserializer<'de> { | |
1103 | fn new(slice: &'de [Value]) -> Self { | |
1104 | SeqRefDeserializer { iter: slice.iter() } | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | impl<'de> serde::Deserializer<'de> for SeqRefDeserializer<'de> { | |
1109 | type Error = Error; | |
1110 | ||
1111 | #[inline] | |
1112 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Error> | |
1113 | where | |
1114 | V: Visitor<'de>, | |
1115 | { | |
1116 | let len = self.iter.len(); | |
1117 | if len == 0 { | |
1118 | visitor.visit_unit() | |
1119 | } else { | |
1120 | let ret = try!(visitor.visit_seq(&mut self)); | |
1121 | let remaining = self.iter.len(); | |
1122 | if remaining == 0 { | |
1123 | Ok(ret) | |
1124 | } else { | |
83c7162d XL |
1125 | Err(serde::de::Error::invalid_length( |
1126 | len, | |
1127 | &"fewer elements in array", | |
1128 | )) | |
041b39d2 XL |
1129 | } |
1130 | } | |
1131 | } | |
1132 | ||
1133 | forward_to_deserialize_any! { | |
8faf50e0 XL |
1134 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
1135 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
1136 | tuple_struct map struct enum identifier ignored_any |
1137 | } | |
1138 | } | |
1139 | ||
1140 | impl<'de> SeqAccess<'de> for SeqRefDeserializer<'de> { | |
1141 | type Error = Error; | |
1142 | ||
1143 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
1144 | where | |
1145 | T: DeserializeSeed<'de>, | |
1146 | { | |
1147 | match self.iter.next() { | |
1148 | Some(value) => seed.deserialize(value).map(Some), | |
1149 | None => Ok(None), | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | fn size_hint(&self) -> Option<usize> { | |
1154 | match self.iter.size_hint() { | |
1155 | (lower, Some(upper)) if lower == upper => Some(upper), | |
1156 | _ => None, | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | struct MapRefDeserializer<'de> { | |
1162 | iter: <&'de Map<String, Value> as IntoIterator>::IntoIter, | |
1163 | value: Option<&'de Value>, | |
1164 | } | |
1165 | ||
1166 | impl<'de> MapRefDeserializer<'de> { | |
1167 | fn new(map: &'de Map<String, Value>) -> Self { | |
1168 | MapRefDeserializer { | |
1169 | iter: map.into_iter(), | |
1170 | value: None, | |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | impl<'de> MapAccess<'de> for MapRefDeserializer<'de> { | |
1176 | type Error = Error; | |
1177 | ||
1178 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error> | |
1179 | where | |
1180 | T: DeserializeSeed<'de>, | |
1181 | { | |
1182 | match self.iter.next() { | |
1183 | Some((key, value)) => { | |
1184 | self.value = Some(value); | |
83c7162d XL |
1185 | let key_de = MapKeyDeserializer { |
1186 | key: Cow::Borrowed(&**key), | |
1187 | }; | |
041b39d2 XL |
1188 | seed.deserialize(key_de).map(Some) |
1189 | } | |
1190 | None => Ok(None), | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Error> | |
1195 | where | |
1196 | T: DeserializeSeed<'de>, | |
1197 | { | |
1198 | match self.value.take() { | |
1199 | Some(value) => seed.deserialize(value), | |
1200 | None => Err(serde::de::Error::custom("value is missing")), | |
1201 | } | |
1202 | } | |
1203 | ||
1204 | fn size_hint(&self) -> Option<usize> { | |
1205 | match self.iter.size_hint() { | |
1206 | (lower, Some(upper)) if lower == upper => Some(upper), | |
1207 | _ => None, | |
1208 | } | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | impl<'de> serde::Deserializer<'de> for MapRefDeserializer<'de> { | |
1213 | type Error = Error; | |
1214 | ||
1215 | #[inline] | |
1216 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
1217 | where | |
1218 | V: Visitor<'de>, | |
1219 | { | |
1220 | visitor.visit_map(self) | |
1221 | } | |
1222 | ||
1223 | forward_to_deserialize_any! { | |
8faf50e0 XL |
1224 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
1225 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
1226 | tuple_struct map struct enum identifier ignored_any |
1227 | } | |
1228 | } | |
1229 | ||
1230 | struct MapKeyDeserializer<'de> { | |
1231 | key: Cow<'de, str>, | |
1232 | } | |
1233 | ||
1234 | macro_rules! deserialize_integer_key { | |
0531ce1d XL |
1235 | ($method:ident => $visit:ident) => { |
1236 | fn $method<V>(self, visitor: V) -> Result<V::Value, Error> | |
041b39d2 XL |
1237 | where |
1238 | V: Visitor<'de>, | |
1239 | { | |
1240 | match (self.key.parse(), self.key) { | |
1241 | (Ok(integer), _) => visitor.$visit(integer), | |
1242 | (Err(_), Cow::Borrowed(s)) => visitor.visit_borrowed_str(s), | |
1243 | (Err(_), Cow::Owned(s)) => visitor.visit_string(s), | |
1244 | } | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | impl<'de> serde::Deserializer<'de> for MapKeyDeserializer<'de> { | |
1250 | type Error = Error; | |
1251 | ||
1252 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error> | |
1253 | where | |
1254 | V: Visitor<'de>, | |
1255 | { | |
1256 | self.key.into_deserializer().deserialize_any(visitor) | |
1257 | } | |
1258 | ||
1259 | deserialize_integer_key!(deserialize_i8 => visit_i8); | |
1260 | deserialize_integer_key!(deserialize_i16 => visit_i16); | |
1261 | deserialize_integer_key!(deserialize_i32 => visit_i32); | |
1262 | deserialize_integer_key!(deserialize_i64 => visit_i64); | |
1263 | deserialize_integer_key!(deserialize_u8 => visit_u8); | |
1264 | deserialize_integer_key!(deserialize_u16 => visit_u16); | |
1265 | deserialize_integer_key!(deserialize_u32 => visit_u32); | |
1266 | deserialize_integer_key!(deserialize_u64 => visit_u64); | |
1267 | ||
8faf50e0 XL |
1268 | serde_if_integer128! { |
1269 | deserialize_integer_key!(deserialize_i128 => visit_i128); | |
1270 | deserialize_integer_key!(deserialize_u128 => visit_u128); | |
1271 | } | |
1272 | ||
041b39d2 XL |
1273 | #[inline] |
1274 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error> | |
1275 | where | |
1276 | V: Visitor<'de>, | |
1277 | { | |
1278 | // Map keys cannot be null. | |
1279 | visitor.visit_some(self) | |
1280 | } | |
1281 | ||
1282 | #[inline] | |
83c7162d XL |
1283 | fn deserialize_newtype_struct<V>( |
1284 | self, | |
1285 | _name: &'static str, | |
1286 | visitor: V, | |
1287 | ) -> Result<V::Value, Error> | |
041b39d2 XL |
1288 | where |
1289 | V: Visitor<'de>, | |
1290 | { | |
1291 | visitor.visit_newtype_struct(self) | |
1292 | } | |
1293 | ||
1294 | fn deserialize_enum<V>( | |
1295 | self, | |
1296 | name: &'static str, | |
1297 | variants: &'static [&'static str], | |
1298 | visitor: V, | |
1299 | ) -> Result<V::Value, Error> | |
1300 | where | |
1301 | V: Visitor<'de>, | |
1302 | { | |
83c7162d XL |
1303 | self.key |
1304 | .into_deserializer() | |
1305 | .deserialize_enum(name, variants, visitor) | |
041b39d2 XL |
1306 | } |
1307 | ||
1308 | forward_to_deserialize_any! { | |
1309 | bool f32 f64 char str string bytes byte_buf unit unit_struct seq tuple | |
1310 | tuple_struct map struct identifier ignored_any | |
1311 | } | |
1312 | } | |
1313 | ||
0bf4aa26 XL |
1314 | struct KeyClassifier; |
1315 | ||
1316 | enum KeyClass { | |
1317 | Map(String), | |
1318 | #[cfg(feature = "arbitrary_precision")] | |
1319 | Number, | |
1320 | #[cfg(feature = "raw_value")] | |
1321 | RawValue, | |
0531ce1d XL |
1322 | } |
1323 | ||
0bf4aa26 XL |
1324 | impl<'de> DeserializeSeed<'de> for KeyClassifier { |
1325 | type Value = KeyClass; | |
0531ce1d XL |
1326 | |
1327 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
1328 | where | |
83c7162d | 1329 | D: serde::Deserializer<'de>, |
0531ce1d | 1330 | { |
0bf4aa26 | 1331 | deserializer.deserialize_str(self) |
0531ce1d XL |
1332 | } |
1333 | } | |
1334 | ||
0bf4aa26 XL |
1335 | impl<'de> Visitor<'de> for KeyClassifier { |
1336 | type Value = KeyClass; | |
0531ce1d XL |
1337 | |
1338 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1339 | formatter.write_str("a string key") | |
1340 | } | |
1341 | ||
0bf4aa26 | 1342 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> |
0531ce1d XL |
1343 | where |
1344 | E: de::Error, | |
1345 | { | |
0bf4aa26 XL |
1346 | match s { |
1347 | #[cfg(feature = "arbitrary_precision")] | |
1348 | ::number::TOKEN => Ok(KeyClass::Number), | |
1349 | #[cfg(feature = "raw_value")] | |
1350 | ::raw::TOKEN => Ok(KeyClass::RawValue), | |
1351 | _ => Ok(KeyClass::Map(s.to_owned())), | |
0531ce1d XL |
1352 | } |
1353 | } | |
1354 | ||
0bf4aa26 | 1355 | fn visit_string<E>(self, s: String) -> Result<Self::Value, E> |
0531ce1d XL |
1356 | where |
1357 | E: de::Error, | |
1358 | { | |
0bf4aa26 XL |
1359 | match s.as_str() { |
1360 | #[cfg(feature = "arbitrary_precision")] | |
1361 | ::number::TOKEN => Ok(KeyClass::Number), | |
1362 | #[cfg(feature = "raw_value")] | |
1363 | ::raw::TOKEN => Ok(KeyClass::RawValue), | |
1364 | _ => Ok(KeyClass::Map(s)), | |
0531ce1d XL |
1365 | } |
1366 | } | |
1367 | } | |
1368 | ||
041b39d2 | 1369 | impl Value { |
83c7162d XL |
1370 | #[cold] |
1371 | fn invalid_type<E>(&self, exp: &Expected) -> E | |
1372 | where | |
1373 | E: serde::de::Error, | |
1374 | { | |
1375 | serde::de::Error::invalid_type(self.unexpected(), exp) | |
1376 | } | |
1377 | ||
8faf50e0 | 1378 | #[cold] |
041b39d2 XL |
1379 | fn unexpected(&self) -> Unexpected { |
1380 | match *self { | |
1381 | Value::Null => Unexpected::Unit, | |
1382 | Value::Bool(b) => Unexpected::Bool(b), | |
1383 | Value::Number(ref n) => n.unexpected(), | |
1384 | Value::String(ref s) => Unexpected::Str(s), | |
1385 | Value::Array(_) => Unexpected::Seq, | |
1386 | Value::Object(_) => Unexpected::Map, | |
1387 | } | |
1388 | } | |
1389 | } |