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041b39d2 XL |
1 | use lib::*; |
2 | ||
5869c6ff XL |
3 | use de::value::{BorrowedBytesDeserializer, BytesDeserializer}; |
4 | use de::{Deserialize, Deserializer, Error, IntoDeserializer, Visitor}; | |
041b39d2 XL |
5 | |
6 | #[cfg(any(feature = "std", feature = "alloc"))] | |
5869c6ff | 7 | use de::{DeserializeSeed, MapAccess, Unexpected}; |
041b39d2 XL |
8 | |
9 | #[cfg(any(feature = "std", feature = "alloc"))] | |
8faf50e0 XL |
10 | pub use self::content::{ |
11 | Content, ContentDeserializer, ContentRefDeserializer, EnumDeserializer, | |
12 | InternallyTaggedUnitVisitor, TagContentOtherField, TagContentOtherFieldVisitor, | |
13 | TagOrContentField, TagOrContentFieldVisitor, TaggedContentVisitor, UntaggedUnitVisitor, | |
14 | }; | |
041b39d2 | 15 | |
5869c6ff XL |
16 | pub use seed::InPlaceSeed; |
17 | ||
041b39d2 XL |
18 | /// If the missing field is of type `Option<T>` then treat is as `None`, |
19 | /// otherwise it is an error. | |
20 | pub fn missing_field<'de, V, E>(field: &'static str) -> Result<V, E> | |
21 | where | |
22 | V: Deserialize<'de>, | |
23 | E: Error, | |
24 | { | |
25 | struct MissingFieldDeserializer<E>(&'static str, PhantomData<E>); | |
26 | ||
27 | impl<'de, E> Deserializer<'de> for MissingFieldDeserializer<E> | |
28 | where | |
29 | E: Error, | |
30 | { | |
31 | type Error = E; | |
32 | ||
33 | fn deserialize_any<V>(self, _visitor: V) -> Result<V::Value, E> | |
34 | where | |
35 | V: Visitor<'de>, | |
36 | { | |
37 | Err(Error::missing_field(self.0)) | |
38 | } | |
39 | ||
40 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, E> | |
41 | where | |
42 | V: Visitor<'de>, | |
43 | { | |
44 | visitor.visit_none() | |
45 | } | |
46 | ||
47 | forward_to_deserialize_any! { | |
8faf50e0 XL |
48 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
49 | bytes byte_buf unit unit_struct newtype_struct seq tuple | |
50 | tuple_struct map struct enum identifier ignored_any | |
041b39d2 XL |
51 | } |
52 | } | |
53 | ||
54 | let deserializer = MissingFieldDeserializer(field, PhantomData); | |
55 | Deserialize::deserialize(deserializer) | |
56 | } | |
57 | ||
58 | #[cfg(any(feature = "std", feature = "alloc"))] | |
f035d41b | 59 | pub fn borrow_cow_str<'de: 'a, 'a, D, R>(deserializer: D) -> Result<R, D::Error> |
041b39d2 XL |
60 | where |
61 | D: Deserializer<'de>, | |
f035d41b | 62 | R: From<Cow<'a, str>>, |
041b39d2 XL |
63 | { |
64 | struct CowStrVisitor; | |
65 | ||
66 | impl<'a> Visitor<'a> for CowStrVisitor { | |
67 | type Value = Cow<'a, str>; | |
68 | ||
69 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
70 | formatter.write_str("a string") | |
71 | } | |
72 | ||
73 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> | |
74 | where | |
75 | E: Error, | |
76 | { | |
77 | Ok(Cow::Owned(v.to_owned())) | |
78 | } | |
79 | ||
80 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
81 | where | |
82 | E: Error, | |
83 | { | |
84 | Ok(Cow::Borrowed(v)) | |
85 | } | |
86 | ||
87 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> | |
88 | where | |
89 | E: Error, | |
90 | { | |
91 | Ok(Cow::Owned(v)) | |
92 | } | |
93 | ||
94 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> | |
95 | where | |
96 | E: Error, | |
97 | { | |
98 | match str::from_utf8(v) { | |
99 | Ok(s) => Ok(Cow::Owned(s.to_owned())), | |
100 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
101 | } | |
102 | } | |
103 | ||
104 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
105 | where | |
106 | E: Error, | |
107 | { | |
108 | match str::from_utf8(v) { | |
109 | Ok(s) => Ok(Cow::Borrowed(s)), | |
110 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
111 | } | |
112 | } | |
113 | ||
114 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> | |
115 | where | |
116 | E: Error, | |
117 | { | |
118 | match String::from_utf8(v) { | |
119 | Ok(s) => Ok(Cow::Owned(s)), | |
ff7c6d11 XL |
120 | Err(e) => Err(Error::invalid_value( |
121 | Unexpected::Bytes(&e.into_bytes()), | |
122 | &self, | |
123 | )), | |
041b39d2 XL |
124 | } |
125 | } | |
126 | } | |
127 | ||
f035d41b | 128 | deserializer.deserialize_str(CowStrVisitor).map(From::from) |
041b39d2 XL |
129 | } |
130 | ||
131 | #[cfg(any(feature = "std", feature = "alloc"))] | |
f035d41b | 132 | pub fn borrow_cow_bytes<'de: 'a, 'a, D, R>(deserializer: D) -> Result<R, D::Error> |
041b39d2 XL |
133 | where |
134 | D: Deserializer<'de>, | |
f035d41b | 135 | R: From<Cow<'a, [u8]>>, |
041b39d2 XL |
136 | { |
137 | struct CowBytesVisitor; | |
138 | ||
139 | impl<'a> Visitor<'a> for CowBytesVisitor { | |
140 | type Value = Cow<'a, [u8]>; | |
141 | ||
142 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
143 | formatter.write_str("a byte array") | |
144 | } | |
145 | ||
146 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> | |
147 | where | |
148 | E: Error, | |
149 | { | |
150 | Ok(Cow::Owned(v.as_bytes().to_vec())) | |
151 | } | |
152 | ||
153 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
154 | where | |
155 | E: Error, | |
156 | { | |
157 | Ok(Cow::Borrowed(v.as_bytes())) | |
158 | } | |
159 | ||
160 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> | |
161 | where | |
162 | E: Error, | |
163 | { | |
164 | Ok(Cow::Owned(v.into_bytes())) | |
165 | } | |
166 | ||
167 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> | |
168 | where | |
169 | E: Error, | |
170 | { | |
171 | Ok(Cow::Owned(v.to_vec())) | |
172 | } | |
173 | ||
174 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
175 | where | |
176 | E: Error, | |
177 | { | |
178 | Ok(Cow::Borrowed(v)) | |
179 | } | |
180 | ||
181 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> | |
182 | where | |
183 | E: Error, | |
184 | { | |
185 | Ok(Cow::Owned(v)) | |
186 | } | |
187 | } | |
188 | ||
f035d41b XL |
189 | deserializer |
190 | .deserialize_bytes(CowBytesVisitor) | |
191 | .map(From::from) | |
041b39d2 XL |
192 | } |
193 | ||
041b39d2 XL |
194 | #[cfg(any(feature = "std", feature = "alloc"))] |
195 | mod content { | |
196 | // This module is private and nothing here should be used outside of | |
197 | // generated code. | |
198 | // | |
199 | // We will iterate on the implementation for a few releases and only have to | |
200 | // worry about backward compatibility for the `untagged` and `tag` attributes | |
201 | // rather than for this entire mechanism. | |
202 | // | |
203 | // This issue is tracking making some of this stuff public: | |
204 | // https://github.com/serde-rs/serde/issues/741 | |
205 | ||
206 | use lib::*; | |
207 | ||
5869c6ff | 208 | use __private::size_hint; |
8faf50e0 | 209 | use de::{ |
0731742a XL |
210 | self, Deserialize, DeserializeSeed, Deserializer, EnumAccess, Expected, IgnoredAny, |
211 | MapAccess, SeqAccess, Unexpected, Visitor, | |
8faf50e0 | 212 | }; |
041b39d2 XL |
213 | |
214 | /// Used from generated code to buffer the contents of the Deserializer when | |
215 | /// deserializing untagged enums and internally tagged enums. | |
216 | /// | |
217 | /// Not public API. Use serde-value instead. | |
218 | #[derive(Debug)] | |
219 | pub enum Content<'de> { | |
220 | Bool(bool), | |
221 | ||
222 | U8(u8), | |
223 | U16(u16), | |
224 | U32(u32), | |
225 | U64(u64), | |
226 | ||
227 | I8(i8), | |
228 | I16(i16), | |
229 | I32(i32), | |
230 | I64(i64), | |
231 | ||
232 | F32(f32), | |
233 | F64(f64), | |
234 | ||
235 | Char(char), | |
236 | String(String), | |
237 | Str(&'de str), | |
238 | ByteBuf(Vec<u8>), | |
239 | Bytes(&'de [u8]), | |
240 | ||
241 | None, | |
242 | Some(Box<Content<'de>>), | |
243 | ||
244 | Unit, | |
245 | Newtype(Box<Content<'de>>), | |
246 | Seq(Vec<Content<'de>>), | |
247 | Map(Vec<(Content<'de>, Content<'de>)>), | |
248 | } | |
249 | ||
250 | impl<'de> Content<'de> { | |
0531ce1d XL |
251 | pub fn as_str(&self) -> Option<&str> { |
252 | match *self { | |
253 | Content::Str(x) => Some(x), | |
254 | Content::String(ref x) => Some(x), | |
8faf50e0 XL |
255 | Content::Bytes(x) => str::from_utf8(x).ok(), |
256 | Content::ByteBuf(ref x) => str::from_utf8(x).ok(), | |
0531ce1d XL |
257 | _ => None, |
258 | } | |
259 | } | |
260 | ||
8faf50e0 | 261 | #[cold] |
041b39d2 XL |
262 | fn unexpected(&self) -> Unexpected { |
263 | match *self { | |
264 | Content::Bool(b) => Unexpected::Bool(b), | |
265 | Content::U8(n) => Unexpected::Unsigned(n as u64), | |
266 | Content::U16(n) => Unexpected::Unsigned(n as u64), | |
267 | Content::U32(n) => Unexpected::Unsigned(n as u64), | |
268 | Content::U64(n) => Unexpected::Unsigned(n), | |
269 | Content::I8(n) => Unexpected::Signed(n as i64), | |
270 | Content::I16(n) => Unexpected::Signed(n as i64), | |
271 | Content::I32(n) => Unexpected::Signed(n as i64), | |
272 | Content::I64(n) => Unexpected::Signed(n), | |
273 | Content::F32(f) => Unexpected::Float(f as f64), | |
274 | Content::F64(f) => Unexpected::Float(f), | |
275 | Content::Char(c) => Unexpected::Char(c), | |
276 | Content::String(ref s) => Unexpected::Str(s), | |
277 | Content::Str(s) => Unexpected::Str(s), | |
278 | Content::ByteBuf(ref b) => Unexpected::Bytes(b), | |
279 | Content::Bytes(b) => Unexpected::Bytes(b), | |
280 | Content::None | Content::Some(_) => Unexpected::Option, | |
281 | Content::Unit => Unexpected::Unit, | |
282 | Content::Newtype(_) => Unexpected::NewtypeStruct, | |
283 | Content::Seq(_) => Unexpected::Seq, | |
284 | Content::Map(_) => Unexpected::Map, | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | impl<'de> Deserialize<'de> for Content<'de> { | |
290 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
291 | where | |
292 | D: Deserializer<'de>, | |
293 | { | |
294 | // Untagged and internally tagged enums are only supported in | |
295 | // self-describing formats. | |
296 | let visitor = ContentVisitor { value: PhantomData }; | |
297 | deserializer.deserialize_any(visitor) | |
298 | } | |
299 | } | |
300 | ||
301 | struct ContentVisitor<'de> { | |
302 | value: PhantomData<Content<'de>>, | |
303 | } | |
304 | ||
305 | impl<'de> ContentVisitor<'de> { | |
306 | fn new() -> Self { | |
307 | ContentVisitor { value: PhantomData } | |
308 | } | |
309 | } | |
310 | ||
311 | impl<'de> Visitor<'de> for ContentVisitor<'de> { | |
312 | type Value = Content<'de>; | |
313 | ||
314 | fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result { | |
315 | fmt.write_str("any value") | |
316 | } | |
317 | ||
318 | fn visit_bool<F>(self, value: bool) -> Result<Self::Value, F> | |
319 | where | |
320 | F: de::Error, | |
321 | { | |
322 | Ok(Content::Bool(value)) | |
323 | } | |
324 | ||
325 | fn visit_i8<F>(self, value: i8) -> Result<Self::Value, F> | |
326 | where | |
327 | F: de::Error, | |
328 | { | |
329 | Ok(Content::I8(value)) | |
330 | } | |
331 | ||
332 | fn visit_i16<F>(self, value: i16) -> Result<Self::Value, F> | |
333 | where | |
334 | F: de::Error, | |
335 | { | |
336 | Ok(Content::I16(value)) | |
337 | } | |
338 | ||
339 | fn visit_i32<F>(self, value: i32) -> Result<Self::Value, F> | |
340 | where | |
341 | F: de::Error, | |
342 | { | |
343 | Ok(Content::I32(value)) | |
344 | } | |
345 | ||
346 | fn visit_i64<F>(self, value: i64) -> Result<Self::Value, F> | |
347 | where | |
348 | F: de::Error, | |
349 | { | |
350 | Ok(Content::I64(value)) | |
351 | } | |
352 | ||
353 | fn visit_u8<F>(self, value: u8) -> Result<Self::Value, F> | |
354 | where | |
355 | F: de::Error, | |
356 | { | |
357 | Ok(Content::U8(value)) | |
358 | } | |
359 | ||
360 | fn visit_u16<F>(self, value: u16) -> Result<Self::Value, F> | |
361 | where | |
362 | F: de::Error, | |
363 | { | |
364 | Ok(Content::U16(value)) | |
365 | } | |
366 | ||
367 | fn visit_u32<F>(self, value: u32) -> Result<Self::Value, F> | |
368 | where | |
369 | F: de::Error, | |
370 | { | |
371 | Ok(Content::U32(value)) | |
372 | } | |
373 | ||
374 | fn visit_u64<F>(self, value: u64) -> Result<Self::Value, F> | |
375 | where | |
376 | F: de::Error, | |
377 | { | |
378 | Ok(Content::U64(value)) | |
379 | } | |
380 | ||
381 | fn visit_f32<F>(self, value: f32) -> Result<Self::Value, F> | |
382 | where | |
383 | F: de::Error, | |
384 | { | |
385 | Ok(Content::F32(value)) | |
386 | } | |
387 | ||
388 | fn visit_f64<F>(self, value: f64) -> Result<Self::Value, F> | |
389 | where | |
390 | F: de::Error, | |
391 | { | |
392 | Ok(Content::F64(value)) | |
393 | } | |
394 | ||
395 | fn visit_char<F>(self, value: char) -> Result<Self::Value, F> | |
396 | where | |
397 | F: de::Error, | |
398 | { | |
399 | Ok(Content::Char(value)) | |
400 | } | |
401 | ||
402 | fn visit_str<F>(self, value: &str) -> Result<Self::Value, F> | |
403 | where | |
404 | F: de::Error, | |
405 | { | |
406 | Ok(Content::String(value.into())) | |
407 | } | |
408 | ||
409 | fn visit_borrowed_str<F>(self, value: &'de str) -> Result<Self::Value, F> | |
410 | where | |
411 | F: de::Error, | |
412 | { | |
413 | Ok(Content::Str(value)) | |
414 | } | |
415 | ||
416 | fn visit_string<F>(self, value: String) -> Result<Self::Value, F> | |
417 | where | |
418 | F: de::Error, | |
419 | { | |
420 | Ok(Content::String(value)) | |
421 | } | |
422 | ||
423 | fn visit_bytes<F>(self, value: &[u8]) -> Result<Self::Value, F> | |
424 | where | |
425 | F: de::Error, | |
426 | { | |
427 | Ok(Content::ByteBuf(value.into())) | |
428 | } | |
429 | ||
430 | fn visit_borrowed_bytes<F>(self, value: &'de [u8]) -> Result<Self::Value, F> | |
431 | where | |
432 | F: de::Error, | |
433 | { | |
434 | Ok(Content::Bytes(value)) | |
435 | } | |
436 | ||
437 | fn visit_byte_buf<F>(self, value: Vec<u8>) -> Result<Self::Value, F> | |
438 | where | |
439 | F: de::Error, | |
440 | { | |
441 | Ok(Content::ByteBuf(value)) | |
442 | } | |
443 | ||
444 | fn visit_unit<F>(self) -> Result<Self::Value, F> | |
445 | where | |
446 | F: de::Error, | |
447 | { | |
448 | Ok(Content::Unit) | |
449 | } | |
450 | ||
451 | fn visit_none<F>(self) -> Result<Self::Value, F> | |
452 | where | |
453 | F: de::Error, | |
454 | { | |
455 | Ok(Content::None) | |
456 | } | |
457 | ||
458 | fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
459 | where | |
460 | D: Deserializer<'de>, | |
461 | { | |
462 | Deserialize::deserialize(deserializer).map(|v| Content::Some(Box::new(v))) | |
463 | } | |
464 | ||
465 | fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
466 | where | |
467 | D: Deserializer<'de>, | |
468 | { | |
469 | Deserialize::deserialize(deserializer).map(|v| Content::Newtype(Box::new(v))) | |
470 | } | |
471 | ||
472 | fn visit_seq<V>(self, mut visitor: V) -> Result<Self::Value, V::Error> | |
473 | where | |
474 | V: SeqAccess<'de>, | |
475 | { | |
476 | let mut vec = Vec::with_capacity(size_hint::cautious(visitor.size_hint())); | |
477 | while let Some(e) = try!(visitor.next_element()) { | |
478 | vec.push(e); | |
479 | } | |
480 | Ok(Content::Seq(vec)) | |
481 | } | |
482 | ||
483 | fn visit_map<V>(self, mut visitor: V) -> Result<Self::Value, V::Error> | |
484 | where | |
485 | V: MapAccess<'de>, | |
486 | { | |
487 | let mut vec = Vec::with_capacity(size_hint::cautious(visitor.size_hint())); | |
488 | while let Some(kv) = try!(visitor.next_entry()) { | |
489 | vec.push(kv); | |
490 | } | |
491 | Ok(Content::Map(vec)) | |
492 | } | |
493 | ||
494 | fn visit_enum<V>(self, _visitor: V) -> Result<Self::Value, V::Error> | |
495 | where | |
496 | V: EnumAccess<'de>, | |
497 | { | |
ff7c6d11 XL |
498 | Err(de::Error::custom( |
499 | "untagged and internally tagged enums do not support enum input", | |
500 | )) | |
041b39d2 XL |
501 | } |
502 | } | |
503 | ||
504 | /// This is the type of the map keys in an internally tagged enum. | |
505 | /// | |
506 | /// Not public API. | |
507 | pub enum TagOrContent<'de> { | |
508 | Tag, | |
509 | Content(Content<'de>), | |
510 | } | |
511 | ||
512 | struct TagOrContentVisitor<'de> { | |
513 | name: &'static str, | |
514 | value: PhantomData<TagOrContent<'de>>, | |
515 | } | |
516 | ||
517 | impl<'de> TagOrContentVisitor<'de> { | |
518 | fn new(name: &'static str) -> Self { | |
ff7c6d11 XL |
519 | TagOrContentVisitor { |
520 | name: name, | |
521 | value: PhantomData, | |
522 | } | |
041b39d2 XL |
523 | } |
524 | } | |
525 | ||
526 | impl<'de> DeserializeSeed<'de> for TagOrContentVisitor<'de> { | |
527 | type Value = TagOrContent<'de>; | |
528 | ||
529 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
530 | where | |
531 | D: Deserializer<'de>, | |
532 | { | |
533 | // Internally tagged enums are only supported in self-describing | |
534 | // formats. | |
535 | deserializer.deserialize_any(self) | |
536 | } | |
537 | } | |
538 | ||
539 | impl<'de> Visitor<'de> for TagOrContentVisitor<'de> { | |
540 | type Value = TagOrContent<'de>; | |
541 | ||
542 | fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result { | |
543 | write!(fmt, "a type tag `{}` or any other value", self.name) | |
544 | } | |
545 | ||
546 | fn visit_bool<F>(self, value: bool) -> Result<Self::Value, F> | |
547 | where | |
548 | F: de::Error, | |
549 | { | |
550 | ContentVisitor::new() | |
551 | .visit_bool(value) | |
552 | .map(TagOrContent::Content) | |
553 | } | |
554 | ||
555 | fn visit_i8<F>(self, value: i8) -> Result<Self::Value, F> | |
556 | where | |
557 | F: de::Error, | |
558 | { | |
ff7c6d11 XL |
559 | ContentVisitor::new() |
560 | .visit_i8(value) | |
561 | .map(TagOrContent::Content) | |
041b39d2 XL |
562 | } |
563 | ||
564 | fn visit_i16<F>(self, value: i16) -> Result<Self::Value, F> | |
565 | where | |
566 | F: de::Error, | |
567 | { | |
568 | ContentVisitor::new() | |
569 | .visit_i16(value) | |
570 | .map(TagOrContent::Content) | |
571 | } | |
572 | ||
573 | fn visit_i32<F>(self, value: i32) -> Result<Self::Value, F> | |
574 | where | |
575 | F: de::Error, | |
576 | { | |
577 | ContentVisitor::new() | |
578 | .visit_i32(value) | |
579 | .map(TagOrContent::Content) | |
580 | } | |
581 | ||
582 | fn visit_i64<F>(self, value: i64) -> Result<Self::Value, F> | |
583 | where | |
584 | F: de::Error, | |
585 | { | |
586 | ContentVisitor::new() | |
587 | .visit_i64(value) | |
588 | .map(TagOrContent::Content) | |
589 | } | |
590 | ||
591 | fn visit_u8<F>(self, value: u8) -> Result<Self::Value, F> | |
592 | where | |
593 | F: de::Error, | |
594 | { | |
ff7c6d11 XL |
595 | ContentVisitor::new() |
596 | .visit_u8(value) | |
597 | .map(TagOrContent::Content) | |
041b39d2 XL |
598 | } |
599 | ||
600 | fn visit_u16<F>(self, value: u16) -> Result<Self::Value, F> | |
601 | where | |
602 | F: de::Error, | |
603 | { | |
604 | ContentVisitor::new() | |
605 | .visit_u16(value) | |
606 | .map(TagOrContent::Content) | |
607 | } | |
608 | ||
609 | fn visit_u32<F>(self, value: u32) -> Result<Self::Value, F> | |
610 | where | |
611 | F: de::Error, | |
612 | { | |
613 | ContentVisitor::new() | |
614 | .visit_u32(value) | |
615 | .map(TagOrContent::Content) | |
616 | } | |
617 | ||
618 | fn visit_u64<F>(self, value: u64) -> Result<Self::Value, F> | |
619 | where | |
620 | F: de::Error, | |
621 | { | |
622 | ContentVisitor::new() | |
623 | .visit_u64(value) | |
624 | .map(TagOrContent::Content) | |
625 | } | |
626 | ||
627 | fn visit_f32<F>(self, value: f32) -> Result<Self::Value, F> | |
628 | where | |
629 | F: de::Error, | |
630 | { | |
631 | ContentVisitor::new() | |
632 | .visit_f32(value) | |
633 | .map(TagOrContent::Content) | |
634 | } | |
635 | ||
636 | fn visit_f64<F>(self, value: f64) -> Result<Self::Value, F> | |
637 | where | |
638 | F: de::Error, | |
639 | { | |
640 | ContentVisitor::new() | |
641 | .visit_f64(value) | |
642 | .map(TagOrContent::Content) | |
643 | } | |
644 | ||
645 | fn visit_char<F>(self, value: char) -> Result<Self::Value, F> | |
646 | where | |
647 | F: de::Error, | |
648 | { | |
649 | ContentVisitor::new() | |
650 | .visit_char(value) | |
651 | .map(TagOrContent::Content) | |
652 | } | |
653 | ||
654 | fn visit_str<F>(self, value: &str) -> Result<Self::Value, F> | |
655 | where | |
656 | F: de::Error, | |
657 | { | |
658 | if value == self.name { | |
659 | Ok(TagOrContent::Tag) | |
660 | } else { | |
661 | ContentVisitor::new() | |
662 | .visit_str(value) | |
663 | .map(TagOrContent::Content) | |
664 | } | |
665 | } | |
666 | ||
667 | fn visit_borrowed_str<F>(self, value: &'de str) -> Result<Self::Value, F> | |
668 | where | |
669 | F: de::Error, | |
670 | { | |
671 | if value == self.name { | |
672 | Ok(TagOrContent::Tag) | |
673 | } else { | |
674 | ContentVisitor::new() | |
675 | .visit_borrowed_str(value) | |
676 | .map(TagOrContent::Content) | |
677 | } | |
678 | } | |
679 | ||
680 | fn visit_string<F>(self, value: String) -> Result<Self::Value, F> | |
681 | where | |
682 | F: de::Error, | |
683 | { | |
684 | if value == self.name { | |
685 | Ok(TagOrContent::Tag) | |
686 | } else { | |
687 | ContentVisitor::new() | |
688 | .visit_string(value) | |
689 | .map(TagOrContent::Content) | |
690 | } | |
691 | } | |
692 | ||
693 | fn visit_bytes<F>(self, value: &[u8]) -> Result<Self::Value, F> | |
694 | where | |
695 | F: de::Error, | |
696 | { | |
697 | if value == self.name.as_bytes() { | |
698 | Ok(TagOrContent::Tag) | |
699 | } else { | |
700 | ContentVisitor::new() | |
701 | .visit_bytes(value) | |
702 | .map(TagOrContent::Content) | |
703 | } | |
704 | } | |
705 | ||
706 | fn visit_borrowed_bytes<F>(self, value: &'de [u8]) -> Result<Self::Value, F> | |
707 | where | |
708 | F: de::Error, | |
709 | { | |
710 | if value == self.name.as_bytes() { | |
711 | Ok(TagOrContent::Tag) | |
712 | } else { | |
713 | ContentVisitor::new() | |
714 | .visit_borrowed_bytes(value) | |
715 | .map(TagOrContent::Content) | |
716 | } | |
717 | } | |
718 | ||
719 | fn visit_byte_buf<F>(self, value: Vec<u8>) -> Result<Self::Value, F> | |
720 | where | |
721 | F: de::Error, | |
722 | { | |
723 | if value == self.name.as_bytes() { | |
724 | Ok(TagOrContent::Tag) | |
725 | } else { | |
726 | ContentVisitor::new() | |
727 | .visit_byte_buf(value) | |
728 | .map(TagOrContent::Content) | |
729 | } | |
730 | } | |
731 | ||
732 | fn visit_unit<F>(self) -> Result<Self::Value, F> | |
733 | where | |
734 | F: de::Error, | |
735 | { | |
ff7c6d11 XL |
736 | ContentVisitor::new() |
737 | .visit_unit() | |
738 | .map(TagOrContent::Content) | |
041b39d2 XL |
739 | } |
740 | ||
741 | fn visit_none<F>(self) -> Result<Self::Value, F> | |
742 | where | |
743 | F: de::Error, | |
744 | { | |
ff7c6d11 XL |
745 | ContentVisitor::new() |
746 | .visit_none() | |
747 | .map(TagOrContent::Content) | |
041b39d2 XL |
748 | } |
749 | ||
750 | fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
751 | where | |
752 | D: Deserializer<'de>, | |
753 | { | |
754 | ContentVisitor::new() | |
755 | .visit_some(deserializer) | |
756 | .map(TagOrContent::Content) | |
757 | } | |
758 | ||
759 | fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
760 | where | |
761 | D: Deserializer<'de>, | |
762 | { | |
763 | ContentVisitor::new() | |
764 | .visit_newtype_struct(deserializer) | |
765 | .map(TagOrContent::Content) | |
766 | } | |
767 | ||
768 | fn visit_seq<V>(self, visitor: V) -> Result<Self::Value, V::Error> | |
769 | where | |
770 | V: SeqAccess<'de>, | |
771 | { | |
772 | ContentVisitor::new() | |
773 | .visit_seq(visitor) | |
774 | .map(TagOrContent::Content) | |
775 | } | |
776 | ||
777 | fn visit_map<V>(self, visitor: V) -> Result<Self::Value, V::Error> | |
778 | where | |
779 | V: MapAccess<'de>, | |
780 | { | |
781 | ContentVisitor::new() | |
782 | .visit_map(visitor) | |
783 | .map(TagOrContent::Content) | |
784 | } | |
785 | ||
786 | fn visit_enum<V>(self, visitor: V) -> Result<Self::Value, V::Error> | |
787 | where | |
788 | V: EnumAccess<'de>, | |
789 | { | |
790 | ContentVisitor::new() | |
791 | .visit_enum(visitor) | |
792 | .map(TagOrContent::Content) | |
793 | } | |
794 | } | |
795 | ||
796 | /// Used by generated code to deserialize an internally tagged enum. | |
797 | /// | |
798 | /// Not public API. | |
799 | pub struct TaggedContent<'de, T> { | |
800 | pub tag: T, | |
801 | pub content: Content<'de>, | |
802 | } | |
803 | ||
804 | /// Not public API. | |
805 | pub struct TaggedContentVisitor<'de, T> { | |
806 | tag_name: &'static str, | |
5869c6ff | 807 | expecting: &'static str, |
041b39d2 XL |
808 | value: PhantomData<TaggedContent<'de, T>>, |
809 | } | |
810 | ||
811 | impl<'de, T> TaggedContentVisitor<'de, T> { | |
b7449926 XL |
812 | /// Visitor for the content of an internally tagged enum with the given |
813 | /// tag name. | |
5869c6ff | 814 | pub fn new(name: &'static str, expecting: &'static str) -> Self { |
041b39d2 XL |
815 | TaggedContentVisitor { |
816 | tag_name: name, | |
5869c6ff | 817 | expecting: expecting, |
041b39d2 XL |
818 | value: PhantomData, |
819 | } | |
820 | } | |
821 | } | |
822 | ||
823 | impl<'de, T> DeserializeSeed<'de> for TaggedContentVisitor<'de, T> | |
824 | where | |
825 | T: Deserialize<'de>, | |
826 | { | |
827 | type Value = TaggedContent<'de, T>; | |
828 | ||
829 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
830 | where | |
831 | D: Deserializer<'de>, | |
832 | { | |
833 | // Internally tagged enums are only supported in self-describing | |
834 | // formats. | |
835 | deserializer.deserialize_any(self) | |
836 | } | |
837 | } | |
838 | ||
839 | impl<'de, T> Visitor<'de> for TaggedContentVisitor<'de, T> | |
840 | where | |
841 | T: Deserialize<'de>, | |
842 | { | |
843 | type Value = TaggedContent<'de, T>; | |
844 | ||
845 | fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result { | |
5869c6ff | 846 | fmt.write_str(self.expecting) |
041b39d2 XL |
847 | } |
848 | ||
ea8adc8c | 849 | fn visit_seq<S>(self, mut seq: S) -> Result<Self::Value, S::Error> |
041b39d2 | 850 | where |
ea8adc8c XL |
851 | S: SeqAccess<'de>, |
852 | { | |
853 | let tag = match try!(seq.next_element()) { | |
854 | Some(tag) => tag, | |
855 | None => { | |
856 | return Err(de::Error::missing_field(self.tag_name)); | |
857 | } | |
858 | }; | |
859 | let rest = de::value::SeqAccessDeserializer::new(seq); | |
860 | Ok(TaggedContent { | |
861 | tag: tag, | |
862 | content: try!(Content::deserialize(rest)), | |
863 | }) | |
864 | } | |
865 | ||
866 | fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error> | |
867 | where | |
868 | M: MapAccess<'de>, | |
041b39d2 XL |
869 | { |
870 | let mut tag = None; | |
ea8adc8c | 871 | let mut vec = Vec::with_capacity(size_hint::cautious(map.size_hint())); |
ff7c6d11 | 872 | while let Some(k) = try!(map.next_key_seed(TagOrContentVisitor::new(self.tag_name))) { |
041b39d2 XL |
873 | match k { |
874 | TagOrContent::Tag => { | |
875 | if tag.is_some() { | |
876 | return Err(de::Error::duplicate_field(self.tag_name)); | |
877 | } | |
ea8adc8c | 878 | tag = Some(try!(map.next_value())); |
041b39d2 XL |
879 | } |
880 | TagOrContent::Content(k) => { | |
ea8adc8c | 881 | let v = try!(map.next_value()); |
041b39d2 XL |
882 | vec.push((k, v)); |
883 | } | |
884 | } | |
885 | } | |
886 | match tag { | |
887 | None => Err(de::Error::missing_field(self.tag_name)), | |
ff7c6d11 XL |
888 | Some(tag) => Ok(TaggedContent { |
889 | tag: tag, | |
890 | content: Content::Map(vec), | |
891 | }), | |
041b39d2 XL |
892 | } |
893 | } | |
894 | } | |
895 | ||
896 | /// Used by generated code to deserialize an adjacently tagged enum. | |
897 | /// | |
898 | /// Not public API. | |
899 | pub enum TagOrContentField { | |
900 | Tag, | |
901 | Content, | |
902 | } | |
903 | ||
904 | /// Not public API. | |
905 | pub struct TagOrContentFieldVisitor { | |
906 | pub tag: &'static str, | |
907 | pub content: &'static str, | |
908 | } | |
909 | ||
910 | impl<'de> DeserializeSeed<'de> for TagOrContentFieldVisitor { | |
911 | type Value = TagOrContentField; | |
912 | ||
913 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
914 | where | |
915 | D: Deserializer<'de>, | |
916 | { | |
917 | deserializer.deserialize_str(self) | |
918 | } | |
919 | } | |
920 | ||
921 | impl<'de> Visitor<'de> for TagOrContentFieldVisitor { | |
922 | type Value = TagOrContentField; | |
923 | ||
924 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
925 | write!(formatter, "{:?} or {:?}", self.tag, self.content) | |
926 | } | |
927 | ||
928 | fn visit_str<E>(self, field: &str) -> Result<Self::Value, E> | |
929 | where | |
930 | E: de::Error, | |
931 | { | |
932 | if field == self.tag { | |
933 | Ok(TagOrContentField::Tag) | |
934 | } else if field == self.content { | |
935 | Ok(TagOrContentField::Content) | |
936 | } else { | |
937 | Err(de::Error::invalid_value(Unexpected::Str(field), &self)) | |
938 | } | |
939 | } | |
940 | } | |
941 | ||
942 | /// Used by generated code to deserialize an adjacently tagged enum when | |
943 | /// ignoring unrelated fields is allowed. | |
944 | /// | |
945 | /// Not public API. | |
946 | pub enum TagContentOtherField { | |
947 | Tag, | |
948 | Content, | |
949 | Other, | |
950 | } | |
951 | ||
952 | /// Not public API. | |
953 | pub struct TagContentOtherFieldVisitor { | |
954 | pub tag: &'static str, | |
955 | pub content: &'static str, | |
956 | } | |
957 | ||
958 | impl<'de> DeserializeSeed<'de> for TagContentOtherFieldVisitor { | |
959 | type Value = TagContentOtherField; | |
960 | ||
961 | fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | |
962 | where | |
963 | D: Deserializer<'de>, | |
964 | { | |
965 | deserializer.deserialize_str(self) | |
966 | } | |
967 | } | |
968 | ||
969 | impl<'de> Visitor<'de> for TagContentOtherFieldVisitor { | |
970 | type Value = TagContentOtherField; | |
971 | ||
972 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
ff7c6d11 XL |
973 | write!( |
974 | formatter, | |
975 | "{:?}, {:?}, or other ignored fields", | |
976 | self.tag, self.content | |
977 | ) | |
041b39d2 XL |
978 | } |
979 | ||
980 | fn visit_str<E>(self, field: &str) -> Result<Self::Value, E> | |
981 | where | |
982 | E: de::Error, | |
983 | { | |
984 | if field == self.tag { | |
985 | Ok(TagContentOtherField::Tag) | |
986 | } else if field == self.content { | |
987 | Ok(TagContentOtherField::Content) | |
988 | } else { | |
989 | Ok(TagContentOtherField::Other) | |
990 | } | |
991 | } | |
992 | } | |
993 | ||
994 | /// Not public API | |
995 | pub struct ContentDeserializer<'de, E> { | |
996 | content: Content<'de>, | |
997 | err: PhantomData<E>, | |
998 | } | |
999 | ||
83c7162d XL |
1000 | impl<'de, E> ContentDeserializer<'de, E> |
1001 | where | |
1002 | E: de::Error, | |
1003 | { | |
1004 | #[cold] | |
1005 | fn invalid_type(self, exp: &Expected) -> E { | |
1006 | de::Error::invalid_type(self.content.unexpected(), exp) | |
1007 | } | |
8faf50e0 XL |
1008 | |
1009 | fn deserialize_integer<V>(self, visitor: V) -> Result<V::Value, E> | |
1010 | where | |
1011 | V: Visitor<'de>, | |
1012 | { | |
1013 | match self.content { | |
1014 | Content::U8(v) => visitor.visit_u8(v), | |
1015 | Content::U16(v) => visitor.visit_u16(v), | |
1016 | Content::U32(v) => visitor.visit_u32(v), | |
1017 | Content::U64(v) => visitor.visit_u64(v), | |
1018 | Content::I8(v) => visitor.visit_i8(v), | |
1019 | Content::I16(v) => visitor.visit_i16(v), | |
1020 | Content::I32(v) => visitor.visit_i32(v), | |
1021 | Content::I64(v) => visitor.visit_i64(v), | |
1022 | _ => Err(self.invalid_type(&visitor)), | |
1023 | } | |
1024 | } | |
5869c6ff XL |
1025 | |
1026 | fn deserialize_float<V>(self, visitor: V) -> Result<V::Value, E> | |
1027 | where | |
1028 | V: Visitor<'de>, | |
1029 | { | |
1030 | match self.content { | |
1031 | Content::F32(v) => visitor.visit_f32(v), | |
1032 | Content::F64(v) => visitor.visit_f64(v), | |
1033 | Content::U8(v) => visitor.visit_u8(v), | |
1034 | Content::U16(v) => visitor.visit_u16(v), | |
1035 | Content::U32(v) => visitor.visit_u32(v), | |
1036 | Content::U64(v) => visitor.visit_u64(v), | |
1037 | Content::I8(v) => visitor.visit_i8(v), | |
1038 | Content::I16(v) => visitor.visit_i16(v), | |
1039 | Content::I32(v) => visitor.visit_i32(v), | |
1040 | Content::I64(v) => visitor.visit_i64(v), | |
1041 | _ => Err(self.invalid_type(&visitor)), | |
1042 | } | |
1043 | } | |
83c7162d XL |
1044 | } |
1045 | ||
1046 | fn visit_content_seq<'de, V, E>(content: Vec<Content<'de>>, visitor: V) -> Result<V::Value, E> | |
1047 | where | |
1048 | V: Visitor<'de>, | |
1049 | E: de::Error, | |
1050 | { | |
1051 | let seq = content.into_iter().map(ContentDeserializer::new); | |
1052 | let mut seq_visitor = de::value::SeqDeserializer::new(seq); | |
1053 | let value = try!(visitor.visit_seq(&mut seq_visitor)); | |
1054 | try!(seq_visitor.end()); | |
1055 | Ok(value) | |
1056 | } | |
1057 | ||
1058 | fn visit_content_map<'de, V, E>( | |
1059 | content: Vec<(Content<'de>, Content<'de>)>, | |
1060 | visitor: V, | |
1061 | ) -> Result<V::Value, E> | |
1062 | where | |
1063 | V: Visitor<'de>, | |
1064 | E: de::Error, | |
1065 | { | |
1066 | let map = content | |
1067 | .into_iter() | |
1068 | .map(|(k, v)| (ContentDeserializer::new(k), ContentDeserializer::new(v))); | |
1069 | let mut map_visitor = de::value::MapDeserializer::new(map); | |
1070 | let value = try!(visitor.visit_map(&mut map_visitor)); | |
1071 | try!(map_visitor.end()); | |
1072 | Ok(value) | |
1073 | } | |
1074 | ||
b7449926 XL |
1075 | /// Used when deserializing an internally tagged enum because the content |
1076 | /// will be used exactly once. | |
041b39d2 XL |
1077 | impl<'de, E> Deserializer<'de> for ContentDeserializer<'de, E> |
1078 | where | |
1079 | E: de::Error, | |
1080 | { | |
1081 | type Error = E; | |
1082 | ||
1083 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1084 | where | |
1085 | V: Visitor<'de>, | |
1086 | { | |
1087 | match self.content { | |
1088 | Content::Bool(v) => visitor.visit_bool(v), | |
1089 | Content::U8(v) => visitor.visit_u8(v), | |
1090 | Content::U16(v) => visitor.visit_u16(v), | |
1091 | Content::U32(v) => visitor.visit_u32(v), | |
1092 | Content::U64(v) => visitor.visit_u64(v), | |
1093 | Content::I8(v) => visitor.visit_i8(v), | |
1094 | Content::I16(v) => visitor.visit_i16(v), | |
1095 | Content::I32(v) => visitor.visit_i32(v), | |
1096 | Content::I64(v) => visitor.visit_i64(v), | |
1097 | Content::F32(v) => visitor.visit_f32(v), | |
1098 | Content::F64(v) => visitor.visit_f64(v), | |
1099 | Content::Char(v) => visitor.visit_char(v), | |
1100 | Content::String(v) => visitor.visit_string(v), | |
1101 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1102 | Content::ByteBuf(v) => visitor.visit_byte_buf(v), | |
1103 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1104 | Content::Unit => visitor.visit_unit(), | |
1105 | Content::None => visitor.visit_none(), | |
1106 | Content::Some(v) => visitor.visit_some(ContentDeserializer::new(*v)), | |
1107 | Content::Newtype(v) => visitor.visit_newtype_struct(ContentDeserializer::new(*v)), | |
83c7162d XL |
1108 | Content::Seq(v) => visit_content_seq(v, visitor), |
1109 | Content::Map(v) => visit_content_map(v, visitor), | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1114 | where | |
1115 | V: Visitor<'de>, | |
1116 | { | |
1117 | match self.content { | |
1118 | Content::Bool(v) => visitor.visit_bool(v), | |
1119 | _ => Err(self.invalid_type(&visitor)), | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1124 | where | |
1125 | V: Visitor<'de>, | |
1126 | { | |
8faf50e0 | 1127 | self.deserialize_integer(visitor) |
83c7162d XL |
1128 | } |
1129 | ||
1130 | fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1131 | where | |
1132 | V: Visitor<'de>, | |
1133 | { | |
8faf50e0 | 1134 | self.deserialize_integer(visitor) |
83c7162d XL |
1135 | } |
1136 | ||
1137 | fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1138 | where | |
1139 | V: Visitor<'de>, | |
1140 | { | |
8faf50e0 | 1141 | self.deserialize_integer(visitor) |
83c7162d XL |
1142 | } |
1143 | ||
1144 | fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1145 | where | |
1146 | V: Visitor<'de>, | |
1147 | { | |
8faf50e0 | 1148 | self.deserialize_integer(visitor) |
83c7162d XL |
1149 | } |
1150 | ||
1151 | fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1152 | where | |
1153 | V: Visitor<'de>, | |
1154 | { | |
8faf50e0 | 1155 | self.deserialize_integer(visitor) |
83c7162d XL |
1156 | } |
1157 | ||
1158 | fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1159 | where | |
1160 | V: Visitor<'de>, | |
1161 | { | |
8faf50e0 | 1162 | self.deserialize_integer(visitor) |
83c7162d XL |
1163 | } |
1164 | ||
1165 | fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1166 | where | |
1167 | V: Visitor<'de>, | |
1168 | { | |
8faf50e0 | 1169 | self.deserialize_integer(visitor) |
83c7162d XL |
1170 | } |
1171 | ||
1172 | fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1173 | where | |
1174 | V: Visitor<'de>, | |
1175 | { | |
8faf50e0 | 1176 | self.deserialize_integer(visitor) |
83c7162d XL |
1177 | } |
1178 | ||
1179 | fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1180 | where | |
1181 | V: Visitor<'de>, | |
1182 | { | |
5869c6ff | 1183 | self.deserialize_float(visitor) |
83c7162d XL |
1184 | } |
1185 | ||
1186 | fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1187 | where | |
1188 | V: Visitor<'de>, | |
1189 | { | |
5869c6ff | 1190 | self.deserialize_float(visitor) |
83c7162d XL |
1191 | } |
1192 | ||
1193 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1194 | where | |
1195 | V: Visitor<'de>, | |
1196 | { | |
1197 | match self.content { | |
1198 | Content::Char(v) => visitor.visit_char(v), | |
1199 | Content::String(v) => visitor.visit_string(v), | |
1200 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1201 | _ => Err(self.invalid_type(&visitor)), | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1206 | where | |
1207 | V: Visitor<'de>, | |
1208 | { | |
1209 | self.deserialize_string(visitor) | |
1210 | } | |
1211 | ||
1212 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1213 | where | |
1214 | V: Visitor<'de>, | |
1215 | { | |
1216 | match self.content { | |
1217 | Content::String(v) => visitor.visit_string(v), | |
1218 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1219 | Content::ByteBuf(v) => visitor.visit_byte_buf(v), | |
1220 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1221 | _ => Err(self.invalid_type(&visitor)), | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1226 | where | |
1227 | V: Visitor<'de>, | |
1228 | { | |
1229 | self.deserialize_byte_buf(visitor) | |
1230 | } | |
1231 | ||
1232 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1233 | where | |
1234 | V: Visitor<'de>, | |
1235 | { | |
1236 | match self.content { | |
1237 | Content::String(v) => visitor.visit_string(v), | |
1238 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1239 | Content::ByteBuf(v) => visitor.visit_byte_buf(v), | |
1240 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1241 | Content::Seq(v) => visit_content_seq(v, visitor), | |
1242 | _ => Err(self.invalid_type(&visitor)), | |
041b39d2 XL |
1243 | } |
1244 | } | |
1245 | ||
1246 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1247 | where | |
1248 | V: Visitor<'de>, | |
1249 | { | |
1250 | match self.content { | |
1251 | Content::None => visitor.visit_none(), | |
1252 | Content::Some(v) => visitor.visit_some(ContentDeserializer::new(*v)), | |
1253 | Content::Unit => visitor.visit_unit(), | |
1254 | _ => visitor.visit_some(self), | |
1255 | } | |
1256 | } | |
1257 | ||
83c7162d XL |
1258 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
1259 | where | |
1260 | V: Visitor<'de>, | |
1261 | { | |
1262 | match self.content { | |
1263 | Content::Unit => visitor.visit_unit(), | |
1264 | _ => Err(self.invalid_type(&visitor)), | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | fn deserialize_unit_struct<V>( | |
1269 | self, | |
1270 | _name: &'static str, | |
1271 | visitor: V, | |
1272 | ) -> Result<V::Value, Self::Error> | |
1273 | where | |
1274 | V: Visitor<'de>, | |
1275 | { | |
1276 | match self.content { | |
1277 | // As a special case, allow deserializing untagged newtype | |
1278 | // variant containing unit struct. | |
1279 | // | |
1280 | // #[derive(Deserialize)] | |
1281 | // struct Info; | |
1282 | // | |
1283 | // #[derive(Deserialize)] | |
1284 | // #[serde(tag = "topic")] | |
1285 | // enum Message { | |
1286 | // Info(Info), | |
1287 | // } | |
1288 | // | |
1289 | // We want {"topic":"Info"} to deserialize even though | |
6a06907d | 1290 | // ordinarily unit structs do not deserialize from empty map/seq. |
83c7162d | 1291 | Content::Map(ref v) if v.is_empty() => visitor.visit_unit(), |
6a06907d | 1292 | Content::Seq(ref v) if v.is_empty() => visitor.visit_unit(), |
83c7162d XL |
1293 | _ => self.deserialize_any(visitor), |
1294 | } | |
1295 | } | |
1296 | ||
041b39d2 XL |
1297 | fn deserialize_newtype_struct<V>( |
1298 | self, | |
1299 | _name: &str, | |
1300 | visitor: V, | |
1301 | ) -> Result<V::Value, Self::Error> | |
1302 | where | |
1303 | V: Visitor<'de>, | |
1304 | { | |
8faf50e0 XL |
1305 | match self.content { |
1306 | Content::Newtype(v) => visitor.visit_newtype_struct(ContentDeserializer::new(*v)), | |
1307 | _ => visitor.visit_newtype_struct(self), | |
1308 | } | |
041b39d2 XL |
1309 | } |
1310 | ||
83c7162d XL |
1311 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
1312 | where | |
1313 | V: Visitor<'de>, | |
1314 | { | |
1315 | match self.content { | |
1316 | Content::Seq(v) => visit_content_seq(v, visitor), | |
1317 | _ => Err(self.invalid_type(&visitor)), | |
1318 | } | |
1319 | } | |
1320 | ||
1321 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
1322 | where | |
1323 | V: Visitor<'de>, | |
1324 | { | |
1325 | self.deserialize_seq(visitor) | |
1326 | } | |
1327 | ||
1328 | fn deserialize_tuple_struct<V>( | |
1329 | self, | |
1330 | _name: &'static str, | |
1331 | _len: usize, | |
1332 | visitor: V, | |
1333 | ) -> Result<V::Value, Self::Error> | |
1334 | where | |
1335 | V: Visitor<'de>, | |
1336 | { | |
1337 | self.deserialize_seq(visitor) | |
1338 | } | |
1339 | ||
1340 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1341 | where | |
1342 | V: Visitor<'de>, | |
1343 | { | |
1344 | match self.content { | |
1345 | Content::Map(v) => visit_content_map(v, visitor), | |
1346 | _ => Err(self.invalid_type(&visitor)), | |
1347 | } | |
1348 | } | |
1349 | ||
1350 | fn deserialize_struct<V>( | |
1351 | self, | |
1352 | _name: &'static str, | |
1353 | _fields: &'static [&'static str], | |
1354 | visitor: V, | |
1355 | ) -> Result<V::Value, Self::Error> | |
1356 | where | |
1357 | V: Visitor<'de>, | |
1358 | { | |
1359 | match self.content { | |
1360 | Content::Seq(v) => visit_content_seq(v, visitor), | |
1361 | Content::Map(v) => visit_content_map(v, visitor), | |
1362 | _ => Err(self.invalid_type(&visitor)), | |
1363 | } | |
1364 | } | |
1365 | ||
041b39d2 XL |
1366 | fn deserialize_enum<V>( |
1367 | self, | |
1368 | _name: &str, | |
1369 | _variants: &'static [&'static str], | |
1370 | visitor: V, | |
1371 | ) -> Result<V::Value, Self::Error> | |
1372 | where | |
1373 | V: Visitor<'de>, | |
1374 | { | |
1375 | let (variant, value) = match self.content { | |
1376 | Content::Map(value) => { | |
1377 | let mut iter = value.into_iter(); | |
1378 | let (variant, value) = match iter.next() { | |
1379 | Some(v) => v, | |
1380 | None => { | |
ff7c6d11 XL |
1381 | return Err(de::Error::invalid_value( |
1382 | de::Unexpected::Map, | |
1383 | &"map with a single key", | |
1384 | )); | |
041b39d2 XL |
1385 | } |
1386 | }; | |
1387 | // enums are encoded in json as maps with a single key:value pair | |
1388 | if iter.next().is_some() { | |
ff7c6d11 XL |
1389 | return Err(de::Error::invalid_value( |
1390 | de::Unexpected::Map, | |
1391 | &"map with a single key", | |
1392 | )); | |
041b39d2 XL |
1393 | } |
1394 | (variant, Some(value)) | |
1395 | } | |
1396 | s @ Content::String(_) | s @ Content::Str(_) => (s, None), | |
1397 | other => { | |
ff7c6d11 XL |
1398 | return Err(de::Error::invalid_type( |
1399 | other.unexpected(), | |
1400 | &"string or map", | |
1401 | )); | |
041b39d2 XL |
1402 | } |
1403 | }; | |
1404 | ||
0531ce1d | 1405 | visitor.visit_enum(EnumDeserializer::new(variant, value)) |
041b39d2 XL |
1406 | } |
1407 | ||
83c7162d | 1408 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
abe05a73 XL |
1409 | where |
1410 | V: Visitor<'de>, | |
1411 | { | |
1412 | match self.content { | |
83c7162d XL |
1413 | Content::String(v) => visitor.visit_string(v), |
1414 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
8faf50e0 XL |
1415 | Content::ByteBuf(v) => visitor.visit_byte_buf(v), |
1416 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
0731742a | 1417 | Content::U8(v) => visitor.visit_u8(v), |
e1599b0c | 1418 | Content::U64(v) => visitor.visit_u64(v), |
83c7162d | 1419 | _ => Err(self.invalid_type(&visitor)), |
abe05a73 XL |
1420 | } |
1421 | } | |
1422 | ||
83c7162d XL |
1423 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
1424 | where | |
1425 | V: Visitor<'de>, | |
1426 | { | |
1427 | drop(self); | |
1428 | visitor.visit_unit() | |
041b39d2 XL |
1429 | } |
1430 | } | |
1431 | ||
1432 | impl<'de, E> ContentDeserializer<'de, E> { | |
1433 | /// private API, don't use | |
1434 | pub fn new(content: Content<'de>) -> Self { | |
1435 | ContentDeserializer { | |
1436 | content: content, | |
1437 | err: PhantomData, | |
1438 | } | |
1439 | } | |
1440 | } | |
1441 | ||
0531ce1d | 1442 | pub struct EnumDeserializer<'de, E> |
041b39d2 XL |
1443 | where |
1444 | E: de::Error, | |
1445 | { | |
1446 | variant: Content<'de>, | |
1447 | value: Option<Content<'de>>, | |
1448 | err: PhantomData<E>, | |
1449 | } | |
1450 | ||
0531ce1d | 1451 | impl<'de, E> EnumDeserializer<'de, E> |
83c7162d XL |
1452 | where |
1453 | E: de::Error, | |
0531ce1d XL |
1454 | { |
1455 | pub fn new(variant: Content<'de>, value: Option<Content<'de>>) -> EnumDeserializer<'de, E> { | |
1456 | EnumDeserializer { | |
1457 | variant: variant, | |
1458 | value: value, | |
1459 | err: PhantomData, | |
1460 | } | |
1461 | } | |
1462 | } | |
1463 | ||
041b39d2 XL |
1464 | impl<'de, E> de::EnumAccess<'de> for EnumDeserializer<'de, E> |
1465 | where | |
1466 | E: de::Error, | |
1467 | { | |
1468 | type Error = E; | |
1469 | type Variant = VariantDeserializer<'de, Self::Error>; | |
1470 | ||
1471 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), E> | |
1472 | where | |
1473 | V: de::DeserializeSeed<'de>, | |
1474 | { | |
1475 | let visitor = VariantDeserializer { | |
1476 | value: self.value, | |
1477 | err: PhantomData, | |
1478 | }; | |
1479 | seed.deserialize(ContentDeserializer::new(self.variant)) | |
1480 | .map(|v| (v, visitor)) | |
1481 | } | |
1482 | } | |
1483 | ||
0531ce1d | 1484 | pub struct VariantDeserializer<'de, E> |
041b39d2 XL |
1485 | where |
1486 | E: de::Error, | |
1487 | { | |
1488 | value: Option<Content<'de>>, | |
1489 | err: PhantomData<E>, | |
1490 | } | |
1491 | ||
1492 | impl<'de, E> de::VariantAccess<'de> for VariantDeserializer<'de, E> | |
1493 | where | |
1494 | E: de::Error, | |
1495 | { | |
1496 | type Error = E; | |
1497 | ||
1498 | fn unit_variant(self) -> Result<(), E> { | |
1499 | match self.value { | |
1500 | Some(value) => de::Deserialize::deserialize(ContentDeserializer::new(value)), | |
1501 | None => Ok(()), | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, E> | |
1506 | where | |
1507 | T: de::DeserializeSeed<'de>, | |
1508 | { | |
1509 | match self.value { | |
1510 | Some(value) => seed.deserialize(ContentDeserializer::new(value)), | |
ff7c6d11 XL |
1511 | None => Err(de::Error::invalid_type( |
1512 | de::Unexpected::UnitVariant, | |
1513 | &"newtype variant", | |
1514 | )), | |
041b39d2 XL |
1515 | } |
1516 | } | |
1517 | ||
1518 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
1519 | where | |
1520 | V: de::Visitor<'de>, | |
1521 | { | |
1522 | match self.value { | |
1523 | Some(Content::Seq(v)) => { | |
1524 | de::Deserializer::deserialize_any(SeqDeserializer::new(v), visitor) | |
1525 | } | |
ff7c6d11 XL |
1526 | Some(other) => Err(de::Error::invalid_type( |
1527 | other.unexpected(), | |
1528 | &"tuple variant", | |
1529 | )), | |
1530 | None => Err(de::Error::invalid_type( | |
1531 | de::Unexpected::UnitVariant, | |
1532 | &"tuple variant", | |
1533 | )), | |
041b39d2 XL |
1534 | } |
1535 | } | |
1536 | ||
1537 | fn struct_variant<V>( | |
1538 | self, | |
1539 | _fields: &'static [&'static str], | |
1540 | visitor: V, | |
1541 | ) -> Result<V::Value, Self::Error> | |
1542 | where | |
1543 | V: de::Visitor<'de>, | |
1544 | { | |
1545 | match self.value { | |
1546 | Some(Content::Map(v)) => { | |
1547 | de::Deserializer::deserialize_any(MapDeserializer::new(v), visitor) | |
1548 | } | |
abe05a73 XL |
1549 | Some(Content::Seq(v)) => { |
1550 | de::Deserializer::deserialize_any(SeqDeserializer::new(v), visitor) | |
1551 | } | |
ff7c6d11 XL |
1552 | Some(other) => Err(de::Error::invalid_type( |
1553 | other.unexpected(), | |
1554 | &"struct variant", | |
1555 | )), | |
f035d41b | 1556 | None => Err(de::Error::invalid_type( |
ff7c6d11 XL |
1557 | de::Unexpected::UnitVariant, |
1558 | &"struct variant", | |
1559 | )), | |
041b39d2 XL |
1560 | } |
1561 | } | |
1562 | } | |
1563 | ||
1564 | struct SeqDeserializer<'de, E> | |
1565 | where | |
1566 | E: de::Error, | |
1567 | { | |
1568 | iter: <Vec<Content<'de>> as IntoIterator>::IntoIter, | |
1569 | err: PhantomData<E>, | |
1570 | } | |
1571 | ||
1572 | impl<'de, E> SeqDeserializer<'de, E> | |
1573 | where | |
1574 | E: de::Error, | |
1575 | { | |
1576 | fn new(vec: Vec<Content<'de>>) -> Self { | |
1577 | SeqDeserializer { | |
1578 | iter: vec.into_iter(), | |
1579 | err: PhantomData, | |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | impl<'de, E> de::Deserializer<'de> for SeqDeserializer<'de, E> | |
1585 | where | |
1586 | E: de::Error, | |
1587 | { | |
1588 | type Error = E; | |
1589 | ||
1590 | #[inline] | |
1591 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Self::Error> | |
1592 | where | |
1593 | V: de::Visitor<'de>, | |
1594 | { | |
1595 | let len = self.iter.len(); | |
1596 | if len == 0 { | |
1597 | visitor.visit_unit() | |
1598 | } else { | |
1599 | let ret = try!(visitor.visit_seq(&mut self)); | |
1600 | let remaining = self.iter.len(); | |
1601 | if remaining == 0 { | |
1602 | Ok(ret) | |
1603 | } else { | |
1604 | Err(de::Error::invalid_length(len, &"fewer elements in array")) | |
1605 | } | |
1606 | } | |
1607 | } | |
1608 | ||
1609 | forward_to_deserialize_any! { | |
8faf50e0 XL |
1610 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
1611 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
1612 | tuple_struct map struct enum identifier ignored_any |
1613 | } | |
1614 | } | |
1615 | ||
1616 | impl<'de, E> de::SeqAccess<'de> for SeqDeserializer<'de, E> | |
1617 | where | |
1618 | E: de::Error, | |
1619 | { | |
1620 | type Error = E; | |
1621 | ||
1622 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> | |
1623 | where | |
1624 | T: de::DeserializeSeed<'de>, | |
1625 | { | |
1626 | match self.iter.next() { | |
ff7c6d11 | 1627 | Some(value) => seed.deserialize(ContentDeserializer::new(value)).map(Some), |
041b39d2 XL |
1628 | None => Ok(None), |
1629 | } | |
1630 | } | |
1631 | ||
1632 | fn size_hint(&self) -> Option<usize> { | |
1633 | size_hint::from_bounds(&self.iter) | |
1634 | } | |
1635 | } | |
1636 | ||
1637 | struct MapDeserializer<'de, E> | |
1638 | where | |
1639 | E: de::Error, | |
1640 | { | |
1641 | iter: <Vec<(Content<'de>, Content<'de>)> as IntoIterator>::IntoIter, | |
1642 | value: Option<Content<'de>>, | |
1643 | err: PhantomData<E>, | |
1644 | } | |
1645 | ||
1646 | impl<'de, E> MapDeserializer<'de, E> | |
1647 | where | |
1648 | E: de::Error, | |
1649 | { | |
1650 | fn new(map: Vec<(Content<'de>, Content<'de>)>) -> Self { | |
1651 | MapDeserializer { | |
1652 | iter: map.into_iter(), | |
1653 | value: None, | |
1654 | err: PhantomData, | |
1655 | } | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | impl<'de, E> de::MapAccess<'de> for MapDeserializer<'de, E> | |
1660 | where | |
1661 | E: de::Error, | |
1662 | { | |
1663 | type Error = E; | |
1664 | ||
1665 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> | |
1666 | where | |
1667 | T: de::DeserializeSeed<'de>, | |
1668 | { | |
1669 | match self.iter.next() { | |
1670 | Some((key, value)) => { | |
1671 | self.value = Some(value); | |
1672 | seed.deserialize(ContentDeserializer::new(key)).map(Some) | |
1673 | } | |
1674 | None => Ok(None), | |
1675 | } | |
1676 | } | |
1677 | ||
1678 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> | |
1679 | where | |
1680 | T: de::DeserializeSeed<'de>, | |
1681 | { | |
1682 | match self.value.take() { | |
1683 | Some(value) => seed.deserialize(ContentDeserializer::new(value)), | |
1684 | None => Err(de::Error::custom("value is missing")), | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | fn size_hint(&self) -> Option<usize> { | |
1689 | size_hint::from_bounds(&self.iter) | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | impl<'de, E> de::Deserializer<'de> for MapDeserializer<'de, E> | |
1694 | where | |
1695 | E: de::Error, | |
1696 | { | |
1697 | type Error = E; | |
1698 | ||
1699 | #[inline] | |
1700 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1701 | where | |
1702 | V: de::Visitor<'de>, | |
1703 | { | |
1704 | visitor.visit_map(self) | |
1705 | } | |
1706 | ||
1707 | forward_to_deserialize_any! { | |
8faf50e0 XL |
1708 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
1709 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
1710 | tuple_struct map struct enum identifier ignored_any |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /// Not public API. | |
1715 | pub struct ContentRefDeserializer<'a, 'de: 'a, E> { | |
1716 | content: &'a Content<'de>, | |
1717 | err: PhantomData<E>, | |
1718 | } | |
1719 | ||
83c7162d XL |
1720 | impl<'a, 'de, E> ContentRefDeserializer<'a, 'de, E> |
1721 | where | |
1722 | E: de::Error, | |
1723 | { | |
1724 | #[cold] | |
1725 | fn invalid_type(self, exp: &Expected) -> E { | |
1726 | de::Error::invalid_type(self.content.unexpected(), exp) | |
1727 | } | |
8faf50e0 XL |
1728 | |
1729 | fn deserialize_integer<V>(self, visitor: V) -> Result<V::Value, E> | |
1730 | where | |
1731 | V: Visitor<'de>, | |
1732 | { | |
1733 | match *self.content { | |
1734 | Content::U8(v) => visitor.visit_u8(v), | |
1735 | Content::U16(v) => visitor.visit_u16(v), | |
1736 | Content::U32(v) => visitor.visit_u32(v), | |
1737 | Content::U64(v) => visitor.visit_u64(v), | |
1738 | Content::I8(v) => visitor.visit_i8(v), | |
1739 | Content::I16(v) => visitor.visit_i16(v), | |
1740 | Content::I32(v) => visitor.visit_i32(v), | |
1741 | Content::I64(v) => visitor.visit_i64(v), | |
1742 | _ => Err(self.invalid_type(&visitor)), | |
1743 | } | |
1744 | } | |
6a06907d XL |
1745 | |
1746 | fn deserialize_float<V>(self, visitor: V) -> Result<V::Value, E> | |
1747 | where | |
1748 | V: Visitor<'de>, | |
1749 | { | |
1750 | match *self.content { | |
1751 | Content::F32(v) => visitor.visit_f32(v), | |
1752 | Content::F64(v) => visitor.visit_f64(v), | |
1753 | Content::U8(v) => visitor.visit_u8(v), | |
1754 | Content::U16(v) => visitor.visit_u16(v), | |
1755 | Content::U32(v) => visitor.visit_u32(v), | |
1756 | Content::U64(v) => visitor.visit_u64(v), | |
1757 | Content::I8(v) => visitor.visit_i8(v), | |
1758 | Content::I16(v) => visitor.visit_i16(v), | |
1759 | Content::I32(v) => visitor.visit_i32(v), | |
1760 | Content::I64(v) => visitor.visit_i64(v), | |
1761 | _ => Err(self.invalid_type(&visitor)), | |
1762 | } | |
1763 | } | |
83c7162d XL |
1764 | } |
1765 | ||
1766 | fn visit_content_seq_ref<'a, 'de, V, E>( | |
1767 | content: &'a [Content<'de>], | |
1768 | visitor: V, | |
1769 | ) -> Result<V::Value, E> | |
1770 | where | |
1771 | V: Visitor<'de>, | |
1772 | E: de::Error, | |
1773 | { | |
0731742a | 1774 | let seq = content.iter().map(ContentRefDeserializer::new); |
83c7162d XL |
1775 | let mut seq_visitor = de::value::SeqDeserializer::new(seq); |
1776 | let value = try!(visitor.visit_seq(&mut seq_visitor)); | |
1777 | try!(seq_visitor.end()); | |
1778 | Ok(value) | |
1779 | } | |
1780 | ||
1781 | fn visit_content_map_ref<'a, 'de, V, E>( | |
1782 | content: &'a [(Content<'de>, Content<'de>)], | |
1783 | visitor: V, | |
1784 | ) -> Result<V::Value, E> | |
1785 | where | |
1786 | V: Visitor<'de>, | |
1787 | E: de::Error, | |
1788 | { | |
0731742a | 1789 | let map = content.iter().map(|&(ref k, ref v)| { |
83c7162d XL |
1790 | ( |
1791 | ContentRefDeserializer::new(k), | |
1792 | ContentRefDeserializer::new(v), | |
1793 | ) | |
1794 | }); | |
1795 | let mut map_visitor = de::value::MapDeserializer::new(map); | |
1796 | let value = try!(visitor.visit_map(&mut map_visitor)); | |
1797 | try!(map_visitor.end()); | |
1798 | Ok(value) | |
1799 | } | |
1800 | ||
b7449926 XL |
1801 | /// Used when deserializing an untagged enum because the content may need |
1802 | /// to be used more than once. | |
041b39d2 XL |
1803 | impl<'de, 'a, E> Deserializer<'de> for ContentRefDeserializer<'a, 'de, E> |
1804 | where | |
1805 | E: de::Error, | |
1806 | { | |
1807 | type Error = E; | |
1808 | ||
1809 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, E> | |
1810 | where | |
1811 | V: Visitor<'de>, | |
1812 | { | |
1813 | match *self.content { | |
1814 | Content::Bool(v) => visitor.visit_bool(v), | |
1815 | Content::U8(v) => visitor.visit_u8(v), | |
1816 | Content::U16(v) => visitor.visit_u16(v), | |
1817 | Content::U32(v) => visitor.visit_u32(v), | |
1818 | Content::U64(v) => visitor.visit_u64(v), | |
1819 | Content::I8(v) => visitor.visit_i8(v), | |
1820 | Content::I16(v) => visitor.visit_i16(v), | |
1821 | Content::I32(v) => visitor.visit_i32(v), | |
1822 | Content::I64(v) => visitor.visit_i64(v), | |
1823 | Content::F32(v) => visitor.visit_f32(v), | |
1824 | Content::F64(v) => visitor.visit_f64(v), | |
1825 | Content::Char(v) => visitor.visit_char(v), | |
1826 | Content::String(ref v) => visitor.visit_str(v), | |
1827 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1828 | Content::ByteBuf(ref v) => visitor.visit_bytes(v), | |
1829 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1830 | Content::Unit => visitor.visit_unit(), | |
1831 | Content::None => visitor.visit_none(), | |
1832 | Content::Some(ref v) => visitor.visit_some(ContentRefDeserializer::new(v)), | |
1833 | Content::Newtype(ref v) => { | |
1834 | visitor.visit_newtype_struct(ContentRefDeserializer::new(v)) | |
1835 | } | |
83c7162d XL |
1836 | Content::Seq(ref v) => visit_content_seq_ref(v, visitor), |
1837 | Content::Map(ref v) => visit_content_map_ref(v, visitor), | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | fn deserialize_bool<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1842 | where | |
1843 | V: Visitor<'de>, | |
1844 | { | |
1845 | match *self.content { | |
1846 | Content::Bool(v) => visitor.visit_bool(v), | |
1847 | _ => Err(self.invalid_type(&visitor)), | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | fn deserialize_i8<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1852 | where | |
1853 | V: Visitor<'de>, | |
1854 | { | |
8faf50e0 | 1855 | self.deserialize_integer(visitor) |
83c7162d XL |
1856 | } |
1857 | ||
1858 | fn deserialize_i16<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1859 | where | |
1860 | V: Visitor<'de>, | |
1861 | { | |
8faf50e0 | 1862 | self.deserialize_integer(visitor) |
83c7162d XL |
1863 | } |
1864 | ||
1865 | fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1866 | where | |
1867 | V: Visitor<'de>, | |
1868 | { | |
8faf50e0 | 1869 | self.deserialize_integer(visitor) |
83c7162d XL |
1870 | } |
1871 | ||
1872 | fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1873 | where | |
1874 | V: Visitor<'de>, | |
1875 | { | |
8faf50e0 | 1876 | self.deserialize_integer(visitor) |
83c7162d XL |
1877 | } |
1878 | ||
1879 | fn deserialize_u8<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1880 | where | |
1881 | V: Visitor<'de>, | |
1882 | { | |
8faf50e0 | 1883 | self.deserialize_integer(visitor) |
83c7162d XL |
1884 | } |
1885 | ||
1886 | fn deserialize_u16<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1887 | where | |
1888 | V: Visitor<'de>, | |
1889 | { | |
8faf50e0 | 1890 | self.deserialize_integer(visitor) |
83c7162d XL |
1891 | } |
1892 | ||
1893 | fn deserialize_u32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1894 | where | |
1895 | V: Visitor<'de>, | |
1896 | { | |
8faf50e0 | 1897 | self.deserialize_integer(visitor) |
83c7162d XL |
1898 | } |
1899 | ||
1900 | fn deserialize_u64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1901 | where | |
1902 | V: Visitor<'de>, | |
1903 | { | |
8faf50e0 | 1904 | self.deserialize_integer(visitor) |
83c7162d XL |
1905 | } |
1906 | ||
1907 | fn deserialize_f32<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1908 | where | |
1909 | V: Visitor<'de>, | |
1910 | { | |
6a06907d | 1911 | self.deserialize_float(visitor) |
83c7162d XL |
1912 | } |
1913 | ||
1914 | fn deserialize_f64<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1915 | where | |
1916 | V: Visitor<'de>, | |
1917 | { | |
6a06907d | 1918 | self.deserialize_float(visitor) |
83c7162d XL |
1919 | } |
1920 | ||
1921 | fn deserialize_char<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1922 | where | |
1923 | V: Visitor<'de>, | |
1924 | { | |
1925 | match *self.content { | |
1926 | Content::Char(v) => visitor.visit_char(v), | |
1927 | Content::String(ref v) => visitor.visit_str(v), | |
1928 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1929 | _ => Err(self.invalid_type(&visitor)), | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | fn deserialize_str<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1934 | where | |
1935 | V: Visitor<'de>, | |
1936 | { | |
1937 | match *self.content { | |
1938 | Content::String(ref v) => visitor.visit_str(v), | |
1939 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1940 | Content::ByteBuf(ref v) => visitor.visit_bytes(v), | |
1941 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1942 | _ => Err(self.invalid_type(&visitor)), | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | fn deserialize_string<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1947 | where | |
1948 | V: Visitor<'de>, | |
1949 | { | |
1950 | self.deserialize_str(visitor) | |
1951 | } | |
1952 | ||
1953 | fn deserialize_bytes<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
1954 | where | |
1955 | V: Visitor<'de>, | |
1956 | { | |
1957 | match *self.content { | |
1958 | Content::String(ref v) => visitor.visit_str(v), | |
1959 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
1960 | Content::ByteBuf(ref v) => visitor.visit_bytes(v), | |
1961 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
1962 | Content::Seq(ref v) => visit_content_seq_ref(v, visitor), | |
1963 | _ => Err(self.invalid_type(&visitor)), | |
041b39d2 XL |
1964 | } |
1965 | } | |
1966 | ||
83c7162d XL |
1967 | fn deserialize_byte_buf<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
1968 | where | |
1969 | V: Visitor<'de>, | |
1970 | { | |
1971 | self.deserialize_bytes(visitor) | |
1972 | } | |
1973 | ||
041b39d2 XL |
1974 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, E> |
1975 | where | |
1976 | V: Visitor<'de>, | |
1977 | { | |
1978 | match *self.content { | |
1979 | Content::None => visitor.visit_none(), | |
1980 | Content::Some(ref v) => visitor.visit_some(ContentRefDeserializer::new(v)), | |
1981 | Content::Unit => visitor.visit_unit(), | |
1982 | _ => visitor.visit_some(self), | |
1983 | } | |
1984 | } | |
1985 | ||
83c7162d XL |
1986 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
1987 | where | |
1988 | V: Visitor<'de>, | |
1989 | { | |
1990 | match *self.content { | |
1991 | Content::Unit => visitor.visit_unit(), | |
1992 | _ => Err(self.invalid_type(&visitor)), | |
1993 | } | |
1994 | } | |
1995 | ||
1996 | fn deserialize_unit_struct<V>( | |
1997 | self, | |
1998 | _name: &'static str, | |
1999 | visitor: V, | |
2000 | ) -> Result<V::Value, Self::Error> | |
2001 | where | |
2002 | V: Visitor<'de>, | |
2003 | { | |
2004 | self.deserialize_unit(visitor) | |
2005 | } | |
2006 | ||
041b39d2 XL |
2007 | fn deserialize_newtype_struct<V>(self, _name: &str, visitor: V) -> Result<V::Value, E> |
2008 | where | |
2009 | V: Visitor<'de>, | |
2010 | { | |
8faf50e0 XL |
2011 | match *self.content { |
2012 | Content::Newtype(ref v) => { | |
2013 | visitor.visit_newtype_struct(ContentRefDeserializer::new(v)) | |
2014 | } | |
2015 | _ => visitor.visit_newtype_struct(self), | |
2016 | } | |
041b39d2 XL |
2017 | } |
2018 | ||
83c7162d XL |
2019 | fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
2020 | where | |
2021 | V: Visitor<'de>, | |
2022 | { | |
2023 | match *self.content { | |
2024 | Content::Seq(ref v) => visit_content_seq_ref(v, visitor), | |
2025 | _ => Err(self.invalid_type(&visitor)), | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | fn deserialize_tuple<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
2030 | where | |
2031 | V: Visitor<'de>, | |
2032 | { | |
2033 | self.deserialize_seq(visitor) | |
2034 | } | |
2035 | ||
2036 | fn deserialize_tuple_struct<V>( | |
2037 | self, | |
2038 | _name: &'static str, | |
2039 | _len: usize, | |
2040 | visitor: V, | |
2041 | ) -> Result<V::Value, Self::Error> | |
2042 | where | |
2043 | V: Visitor<'de>, | |
2044 | { | |
2045 | self.deserialize_seq(visitor) | |
2046 | } | |
2047 | ||
2048 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
2049 | where | |
2050 | V: Visitor<'de>, | |
2051 | { | |
2052 | match *self.content { | |
2053 | Content::Map(ref v) => visit_content_map_ref(v, visitor), | |
2054 | _ => Err(self.invalid_type(&visitor)), | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | fn deserialize_struct<V>( | |
2059 | self, | |
2060 | _name: &'static str, | |
2061 | _fields: &'static [&'static str], | |
2062 | visitor: V, | |
2063 | ) -> Result<V::Value, Self::Error> | |
2064 | where | |
2065 | V: Visitor<'de>, | |
2066 | { | |
2067 | match *self.content { | |
2068 | Content::Seq(ref v) => visit_content_seq_ref(v, visitor), | |
2069 | Content::Map(ref v) => visit_content_map_ref(v, visitor), | |
2070 | _ => Err(self.invalid_type(&visitor)), | |
2071 | } | |
2072 | } | |
2073 | ||
041b39d2 XL |
2074 | fn deserialize_enum<V>( |
2075 | self, | |
2076 | _name: &str, | |
2077 | _variants: &'static [&'static str], | |
2078 | visitor: V, | |
2079 | ) -> Result<V::Value, Self::Error> | |
2080 | where | |
2081 | V: Visitor<'de>, | |
2082 | { | |
2083 | let (variant, value) = match *self.content { | |
2084 | Content::Map(ref value) => { | |
0731742a | 2085 | let mut iter = value.iter(); |
041b39d2 XL |
2086 | let &(ref variant, ref value) = match iter.next() { |
2087 | Some(v) => v, | |
2088 | None => { | |
ff7c6d11 XL |
2089 | return Err(de::Error::invalid_value( |
2090 | de::Unexpected::Map, | |
2091 | &"map with a single key", | |
2092 | )); | |
041b39d2 XL |
2093 | } |
2094 | }; | |
2095 | // enums are encoded in json as maps with a single key:value pair | |
2096 | if iter.next().is_some() { | |
ff7c6d11 XL |
2097 | return Err(de::Error::invalid_value( |
2098 | de::Unexpected::Map, | |
2099 | &"map with a single key", | |
2100 | )); | |
041b39d2 XL |
2101 | } |
2102 | (variant, Some(value)) | |
2103 | } | |
2104 | ref s @ Content::String(_) | ref s @ Content::Str(_) => (s, None), | |
2105 | ref other => { | |
ff7c6d11 XL |
2106 | return Err(de::Error::invalid_type( |
2107 | other.unexpected(), | |
2108 | &"string or map", | |
2109 | )); | |
041b39d2 XL |
2110 | } |
2111 | }; | |
2112 | ||
ff7c6d11 XL |
2113 | visitor.visit_enum(EnumRefDeserializer { |
2114 | variant: variant, | |
2115 | value: value, | |
2116 | err: PhantomData, | |
2117 | }) | |
041b39d2 XL |
2118 | } |
2119 | ||
83c7162d XL |
2120 | fn deserialize_identifier<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
2121 | where | |
2122 | V: Visitor<'de>, | |
2123 | { | |
2124 | match *self.content { | |
2125 | Content::String(ref v) => visitor.visit_str(v), | |
2126 | Content::Str(v) => visitor.visit_borrowed_str(v), | |
8faf50e0 XL |
2127 | Content::ByteBuf(ref v) => visitor.visit_bytes(v), |
2128 | Content::Bytes(v) => visitor.visit_borrowed_bytes(v), | |
0731742a | 2129 | Content::U8(v) => visitor.visit_u8(v), |
e1599b0c | 2130 | Content::U64(v) => visitor.visit_u64(v), |
83c7162d XL |
2131 | _ => Err(self.invalid_type(&visitor)), |
2132 | } | |
2133 | } | |
2134 | ||
2135 | fn deserialize_ignored_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
2136 | where | |
2137 | V: Visitor<'de>, | |
2138 | { | |
2139 | visitor.visit_unit() | |
041b39d2 XL |
2140 | } |
2141 | } | |
2142 | ||
2143 | impl<'a, 'de, E> ContentRefDeserializer<'a, 'de, E> { | |
2144 | /// private API, don't use | |
2145 | pub fn new(content: &'a Content<'de>) -> Self { | |
2146 | ContentRefDeserializer { | |
2147 | content: content, | |
2148 | err: PhantomData, | |
2149 | } | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | struct EnumRefDeserializer<'a, 'de: 'a, E> | |
2154 | where | |
2155 | E: de::Error, | |
2156 | { | |
2157 | variant: &'a Content<'de>, | |
2158 | value: Option<&'a Content<'de>>, | |
2159 | err: PhantomData<E>, | |
2160 | } | |
2161 | ||
2162 | impl<'de, 'a, E> de::EnumAccess<'de> for EnumRefDeserializer<'a, 'de, E> | |
2163 | where | |
2164 | E: de::Error, | |
2165 | { | |
2166 | type Error = E; | |
2167 | type Variant = VariantRefDeserializer<'a, 'de, Self::Error>; | |
2168 | ||
2169 | fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error> | |
2170 | where | |
2171 | V: de::DeserializeSeed<'de>, | |
2172 | { | |
2173 | let visitor = VariantRefDeserializer { | |
2174 | value: self.value, | |
2175 | err: PhantomData, | |
2176 | }; | |
2177 | seed.deserialize(ContentRefDeserializer::new(self.variant)) | |
2178 | .map(|v| (v, visitor)) | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | struct VariantRefDeserializer<'a, 'de: 'a, E> | |
2183 | where | |
2184 | E: de::Error, | |
2185 | { | |
2186 | value: Option<&'a Content<'de>>, | |
2187 | err: PhantomData<E>, | |
2188 | } | |
2189 | ||
2190 | impl<'de, 'a, E> de::VariantAccess<'de> for VariantRefDeserializer<'a, 'de, E> | |
2191 | where | |
2192 | E: de::Error, | |
2193 | { | |
2194 | type Error = E; | |
2195 | ||
2196 | fn unit_variant(self) -> Result<(), E> { | |
2197 | match self.value { | |
2198 | Some(value) => de::Deserialize::deserialize(ContentRefDeserializer::new(value)), | |
2199 | None => Ok(()), | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, E> | |
2204 | where | |
2205 | T: de::DeserializeSeed<'de>, | |
2206 | { | |
2207 | match self.value { | |
2208 | Some(value) => seed.deserialize(ContentRefDeserializer::new(value)), | |
ff7c6d11 XL |
2209 | None => Err(de::Error::invalid_type( |
2210 | de::Unexpected::UnitVariant, | |
2211 | &"newtype variant", | |
2212 | )), | |
041b39d2 XL |
2213 | } |
2214 | } | |
2215 | ||
2216 | fn tuple_variant<V>(self, _len: usize, visitor: V) -> Result<V::Value, Self::Error> | |
2217 | where | |
2218 | V: de::Visitor<'de>, | |
2219 | { | |
2220 | match self.value { | |
2221 | Some(&Content::Seq(ref v)) => { | |
2222 | de::Deserializer::deserialize_any(SeqRefDeserializer::new(v), visitor) | |
2223 | } | |
ff7c6d11 XL |
2224 | Some(other) => Err(de::Error::invalid_type( |
2225 | other.unexpected(), | |
2226 | &"tuple variant", | |
2227 | )), | |
2228 | None => Err(de::Error::invalid_type( | |
2229 | de::Unexpected::UnitVariant, | |
2230 | &"tuple variant", | |
2231 | )), | |
041b39d2 XL |
2232 | } |
2233 | } | |
2234 | ||
2235 | fn struct_variant<V>( | |
2236 | self, | |
2237 | _fields: &'static [&'static str], | |
2238 | visitor: V, | |
2239 | ) -> Result<V::Value, Self::Error> | |
2240 | where | |
2241 | V: de::Visitor<'de>, | |
2242 | { | |
2243 | match self.value { | |
2244 | Some(&Content::Map(ref v)) => { | |
2245 | de::Deserializer::deserialize_any(MapRefDeserializer::new(v), visitor) | |
2246 | } | |
abe05a73 XL |
2247 | Some(&Content::Seq(ref v)) => { |
2248 | de::Deserializer::deserialize_any(SeqRefDeserializer::new(v), visitor) | |
2249 | } | |
ff7c6d11 XL |
2250 | Some(other) => Err(de::Error::invalid_type( |
2251 | other.unexpected(), | |
2252 | &"struct variant", | |
2253 | )), | |
f035d41b | 2254 | None => Err(de::Error::invalid_type( |
ff7c6d11 XL |
2255 | de::Unexpected::UnitVariant, |
2256 | &"struct variant", | |
2257 | )), | |
041b39d2 XL |
2258 | } |
2259 | } | |
2260 | } | |
2261 | ||
2262 | struct SeqRefDeserializer<'a, 'de: 'a, E> | |
2263 | where | |
2264 | E: de::Error, | |
2265 | { | |
2266 | iter: <&'a [Content<'de>] as IntoIterator>::IntoIter, | |
2267 | err: PhantomData<E>, | |
2268 | } | |
2269 | ||
2270 | impl<'a, 'de, E> SeqRefDeserializer<'a, 'de, E> | |
2271 | where | |
2272 | E: de::Error, | |
2273 | { | |
0731742a | 2274 | fn new(slice: &'a [Content<'de>]) -> Self { |
041b39d2 | 2275 | SeqRefDeserializer { |
0731742a | 2276 | iter: slice.iter(), |
041b39d2 XL |
2277 | err: PhantomData, |
2278 | } | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | impl<'de, 'a, E> de::Deserializer<'de> for SeqRefDeserializer<'a, 'de, E> | |
2283 | where | |
2284 | E: de::Error, | |
2285 | { | |
2286 | type Error = E; | |
2287 | ||
2288 | #[inline] | |
2289 | fn deserialize_any<V>(mut self, visitor: V) -> Result<V::Value, Self::Error> | |
2290 | where | |
2291 | V: de::Visitor<'de>, | |
2292 | { | |
2293 | let len = self.iter.len(); | |
2294 | if len == 0 { | |
2295 | visitor.visit_unit() | |
2296 | } else { | |
2297 | let ret = try!(visitor.visit_seq(&mut self)); | |
2298 | let remaining = self.iter.len(); | |
2299 | if remaining == 0 { | |
2300 | Ok(ret) | |
2301 | } else { | |
2302 | Err(de::Error::invalid_length(len, &"fewer elements in array")) | |
2303 | } | |
2304 | } | |
2305 | } | |
2306 | ||
2307 | forward_to_deserialize_any! { | |
8faf50e0 XL |
2308 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
2309 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
2310 | tuple_struct map struct enum identifier ignored_any |
2311 | } | |
2312 | } | |
2313 | ||
2314 | impl<'de, 'a, E> de::SeqAccess<'de> for SeqRefDeserializer<'a, 'de, E> | |
2315 | where | |
2316 | E: de::Error, | |
2317 | { | |
2318 | type Error = E; | |
2319 | ||
2320 | fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> | |
2321 | where | |
2322 | T: de::DeserializeSeed<'de>, | |
2323 | { | |
2324 | match self.iter.next() { | |
8faf50e0 XL |
2325 | Some(value) => seed |
2326 | .deserialize(ContentRefDeserializer::new(value)) | |
ff7c6d11 | 2327 | .map(Some), |
041b39d2 XL |
2328 | None => Ok(None), |
2329 | } | |
2330 | } | |
2331 | ||
2332 | fn size_hint(&self) -> Option<usize> { | |
2333 | size_hint::from_bounds(&self.iter) | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | struct MapRefDeserializer<'a, 'de: 'a, E> | |
2338 | where | |
2339 | E: de::Error, | |
2340 | { | |
2341 | iter: <&'a [(Content<'de>, Content<'de>)] as IntoIterator>::IntoIter, | |
2342 | value: Option<&'a Content<'de>>, | |
2343 | err: PhantomData<E>, | |
2344 | } | |
2345 | ||
2346 | impl<'a, 'de, E> MapRefDeserializer<'a, 'de, E> | |
2347 | where | |
2348 | E: de::Error, | |
2349 | { | |
2350 | fn new(map: &'a [(Content<'de>, Content<'de>)]) -> Self { | |
2351 | MapRefDeserializer { | |
0731742a | 2352 | iter: map.iter(), |
041b39d2 XL |
2353 | value: None, |
2354 | err: PhantomData, | |
2355 | } | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | impl<'de, 'a, E> de::MapAccess<'de> for MapRefDeserializer<'a, 'de, E> | |
2360 | where | |
2361 | E: de::Error, | |
2362 | { | |
2363 | type Error = E; | |
2364 | ||
2365 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> | |
2366 | where | |
2367 | T: de::DeserializeSeed<'de>, | |
2368 | { | |
2369 | match self.iter.next() { | |
2370 | Some(&(ref key, ref value)) => { | |
2371 | self.value = Some(value); | |
ff7c6d11 | 2372 | seed.deserialize(ContentRefDeserializer::new(key)).map(Some) |
041b39d2 XL |
2373 | } |
2374 | None => Ok(None), | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> | |
2379 | where | |
2380 | T: de::DeserializeSeed<'de>, | |
2381 | { | |
2382 | match self.value.take() { | |
2383 | Some(value) => seed.deserialize(ContentRefDeserializer::new(value)), | |
2384 | None => Err(de::Error::custom("value is missing")), | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | fn size_hint(&self) -> Option<usize> { | |
2389 | size_hint::from_bounds(&self.iter) | |
2390 | } | |
2391 | } | |
2392 | ||
2393 | impl<'de, 'a, E> de::Deserializer<'de> for MapRefDeserializer<'a, 'de, E> | |
2394 | where | |
2395 | E: de::Error, | |
2396 | { | |
2397 | type Error = E; | |
2398 | ||
2399 | #[inline] | |
2400 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
2401 | where | |
2402 | V: de::Visitor<'de>, | |
2403 | { | |
2404 | visitor.visit_map(self) | |
2405 | } | |
2406 | ||
2407 | forward_to_deserialize_any! { | |
8faf50e0 XL |
2408 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
2409 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
041b39d2 XL |
2410 | tuple_struct map struct enum identifier ignored_any |
2411 | } | |
2412 | } | |
2413 | ||
2414 | impl<'de, E> de::IntoDeserializer<'de, E> for ContentDeserializer<'de, E> | |
2415 | where | |
2416 | E: de::Error, | |
2417 | { | |
2418 | type Deserializer = Self; | |
2419 | ||
2420 | fn into_deserializer(self) -> Self { | |
2421 | self | |
2422 | } | |
2423 | } | |
2424 | ||
2425 | impl<'de, 'a, E> de::IntoDeserializer<'de, E> for ContentRefDeserializer<'a, 'de, E> | |
2426 | where | |
2427 | E: de::Error, | |
2428 | { | |
2429 | type Deserializer = Self; | |
2430 | ||
2431 | fn into_deserializer(self) -> Self { | |
2432 | self | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | /// Visitor for deserializing an internally tagged unit variant. | |
2437 | /// | |
2438 | /// Not public API. | |
2439 | pub struct InternallyTaggedUnitVisitor<'a> { | |
2440 | type_name: &'a str, | |
2441 | variant_name: &'a str, | |
2442 | } | |
2443 | ||
2444 | impl<'a> InternallyTaggedUnitVisitor<'a> { | |
2445 | /// Not public API. | |
2446 | pub fn new(type_name: &'a str, variant_name: &'a str) -> Self { | |
2447 | InternallyTaggedUnitVisitor { | |
2448 | type_name: type_name, | |
2449 | variant_name: variant_name, | |
2450 | } | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | impl<'de, 'a> Visitor<'de> for InternallyTaggedUnitVisitor<'a> { | |
2455 | type Value = (); | |
2456 | ||
2457 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
ff7c6d11 XL |
2458 | write!( |
2459 | formatter, | |
2460 | "unit variant {}::{}", | |
2461 | self.type_name, self.variant_name | |
2462 | ) | |
041b39d2 XL |
2463 | } |
2464 | ||
ea8adc8c | 2465 | fn visit_seq<S>(self, _: S) -> Result<(), S::Error> |
041b39d2 | 2466 | where |
ea8adc8c XL |
2467 | S: SeqAccess<'de>, |
2468 | { | |
2469 | Ok(()) | |
2470 | } | |
2471 | ||
0731742a | 2472 | fn visit_map<M>(self, mut access: M) -> Result<(), M::Error> |
ea8adc8c XL |
2473 | where |
2474 | M: MapAccess<'de>, | |
041b39d2 | 2475 | { |
f035d41b | 2476 | while try!(access.next_entry::<IgnoredAny, IgnoredAny>()).is_some() {} |
041b39d2 XL |
2477 | Ok(()) |
2478 | } | |
2479 | } | |
2480 | ||
2481 | /// Visitor for deserializing an untagged unit variant. | |
2482 | /// | |
2483 | /// Not public API. | |
2484 | pub struct UntaggedUnitVisitor<'a> { | |
2485 | type_name: &'a str, | |
2486 | variant_name: &'a str, | |
2487 | } | |
2488 | ||
2489 | impl<'a> UntaggedUnitVisitor<'a> { | |
2490 | /// Not public API. | |
2491 | pub fn new(type_name: &'a str, variant_name: &'a str) -> Self { | |
2492 | UntaggedUnitVisitor { | |
2493 | type_name: type_name, | |
2494 | variant_name: variant_name, | |
2495 | } | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | impl<'de, 'a> Visitor<'de> for UntaggedUnitVisitor<'a> { | |
2500 | type Value = (); | |
2501 | ||
2502 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
ff7c6d11 XL |
2503 | write!( |
2504 | formatter, | |
2505 | "unit variant {}::{}", | |
2506 | self.type_name, self.variant_name | |
2507 | ) | |
041b39d2 XL |
2508 | } |
2509 | ||
2510 | fn visit_unit<E>(self) -> Result<(), E> | |
2511 | where | |
2512 | E: de::Error, | |
2513 | { | |
2514 | Ok(()) | |
2515 | } | |
f035d41b XL |
2516 | |
2517 | fn visit_none<E>(self) -> Result<(), E> | |
2518 | where | |
2519 | E: de::Error, | |
2520 | { | |
2521 | Ok(()) | |
2522 | } | |
041b39d2 XL |
2523 | } |
2524 | } | |
2525 | ||
2526 | //////////////////////////////////////////////////////////////////////////////// | |
2527 | ||
2528 | // Like `IntoDeserializer` but also implemented for `&[u8]`. This is used for | |
2529 | // the newtype fallthrough case of `field_identifier`. | |
2530 | // | |
2531 | // #[derive(Deserialize)] | |
2532 | // #[serde(field_identifier)] | |
2533 | // enum F { | |
2534 | // A, | |
2535 | // B, | |
2536 | // Other(String), // deserialized using IdentifierDeserializer | |
2537 | // } | |
2538 | pub trait IdentifierDeserializer<'de, E: Error> { | |
2539 | type Deserializer: Deserializer<'de, Error = E>; | |
2540 | ||
2541 | fn from(self) -> Self::Deserializer; | |
2542 | } | |
2543 | ||
5869c6ff XL |
2544 | pub struct Borrowed<'de, T: 'de + ?Sized>(pub &'de T); |
2545 | ||
2546 | impl<'de, E> IdentifierDeserializer<'de, E> for u64 | |
041b39d2 XL |
2547 | where |
2548 | E: Error, | |
2549 | { | |
5869c6ff | 2550 | type Deserializer = <u64 as IntoDeserializer<'de, E>>::Deserializer; |
041b39d2 XL |
2551 | |
2552 | fn from(self) -> Self::Deserializer { | |
2553 | self.into_deserializer() | |
2554 | } | |
2555 | } | |
2556 | ||
2557 | pub struct StrDeserializer<'a, E> { | |
2558 | value: &'a str, | |
2559 | marker: PhantomData<E>, | |
2560 | } | |
2561 | ||
5869c6ff | 2562 | impl<'de, 'a, E> Deserializer<'de> for StrDeserializer<'a, E> |
041b39d2 XL |
2563 | where |
2564 | E: Error, | |
2565 | { | |
5869c6ff | 2566 | type Error = E; |
041b39d2 | 2567 | |
5869c6ff XL |
2568 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
2569 | where | |
2570 | V: Visitor<'de>, | |
2571 | { | |
2572 | visitor.visit_str(self.value) | |
2573 | } | |
2574 | ||
2575 | forward_to_deserialize_any! { | |
2576 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string | |
2577 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
2578 | tuple_struct map struct enum identifier ignored_any | |
041b39d2 XL |
2579 | } |
2580 | } | |
2581 | ||
5869c6ff XL |
2582 | pub struct BorrowedStrDeserializer<'de, E> { |
2583 | value: &'de str, | |
2584 | marker: PhantomData<E>, | |
2585 | } | |
2586 | ||
2587 | impl<'de, E> Deserializer<'de> for BorrowedStrDeserializer<'de, E> | |
041b39d2 XL |
2588 | where |
2589 | E: Error, | |
2590 | { | |
2591 | type Error = E; | |
2592 | ||
2593 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
2594 | where | |
2595 | V: Visitor<'de>, | |
2596 | { | |
5869c6ff | 2597 | visitor.visit_borrowed_str(self.value) |
041b39d2 XL |
2598 | } |
2599 | ||
2600 | forward_to_deserialize_any! { | |
8faf50e0 XL |
2601 | bool i8 i16 i32 i64 i128 u8 u16 u32 u64 u128 f32 f64 char str string |
2602 | bytes byte_buf option unit unit_struct newtype_struct seq tuple | |
2603 | tuple_struct map struct enum identifier ignored_any | |
041b39d2 XL |
2604 | } |
2605 | } | |
2606 | ||
5869c6ff | 2607 | impl<'a, E> IdentifierDeserializer<'a, E> for &'a str |
041b39d2 XL |
2608 | where |
2609 | E: Error, | |
2610 | { | |
5869c6ff | 2611 | type Deserializer = StrDeserializer<'a, E>; |
041b39d2 XL |
2612 | |
2613 | fn from(self) -> Self::Deserializer { | |
5869c6ff | 2614 | StrDeserializer { |
041b39d2 XL |
2615 | value: self, |
2616 | marker: PhantomData, | |
2617 | } | |
2618 | } | |
2619 | } | |
2620 | ||
5869c6ff | 2621 | impl<'de, E> IdentifierDeserializer<'de, E> for Borrowed<'de, str> |
041b39d2 XL |
2622 | where |
2623 | E: Error, | |
2624 | { | |
5869c6ff | 2625 | type Deserializer = BorrowedStrDeserializer<'de, E>; |
041b39d2 | 2626 | |
5869c6ff XL |
2627 | fn from(self) -> Self::Deserializer { |
2628 | BorrowedStrDeserializer { | |
2629 | value: self.0, | |
2630 | marker: PhantomData, | |
2631 | } | |
041b39d2 | 2632 | } |
5869c6ff | 2633 | } |
041b39d2 | 2634 | |
5869c6ff XL |
2635 | impl<'a, E> IdentifierDeserializer<'a, E> for &'a [u8] |
2636 | where | |
2637 | E: Error, | |
2638 | { | |
2639 | type Deserializer = BytesDeserializer<'a, E>; | |
2640 | ||
2641 | fn from(self) -> Self::Deserializer { | |
2642 | BytesDeserializer::new(self) | |
041b39d2 XL |
2643 | } |
2644 | } | |
ff7c6d11 | 2645 | |
5869c6ff | 2646 | impl<'de, E> IdentifierDeserializer<'de, E> for Borrowed<'de, [u8]> |
ff7c6d11 | 2647 | where |
5869c6ff | 2648 | E: Error, |
ff7c6d11 | 2649 | { |
5869c6ff XL |
2650 | type Deserializer = BorrowedBytesDeserializer<'de, E>; |
2651 | ||
2652 | fn from(self) -> Self::Deserializer { | |
2653 | BorrowedBytesDeserializer::new(self.0) | |
ff7c6d11 XL |
2654 | } |
2655 | } | |
0531ce1d XL |
2656 | |
2657 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2658 | pub struct FlatMapDeserializer<'a, 'de: 'a, E>( | |
2659 | pub &'a mut Vec<Option<(Content<'de>, Content<'de>)>>, | |
83c7162d | 2660 | pub PhantomData<E>, |
0531ce1d XL |
2661 | ); |
2662 | ||
8faf50e0 XL |
2663 | #[cfg(any(feature = "std", feature = "alloc"))] |
2664 | impl<'a, 'de, E> FlatMapDeserializer<'a, 'de, E> | |
2665 | where | |
2666 | E: Error, | |
2667 | { | |
2668 | fn deserialize_other<V>() -> Result<V, E> { | |
2669 | Err(Error::custom("can only flatten structs and maps")) | |
2670 | } | |
2671 | } | |
2672 | ||
2673 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2674 | macro_rules! forward_to_deserialize_other { | |
2675 | ($($func:ident ( $($arg:ty),* ))*) => { | |
2676 | $( | |
2677 | fn $func<V>(self, $(_: $arg,)* _visitor: V) -> Result<V::Value, Self::Error> | |
2678 | where | |
2679 | V: Visitor<'de>, | |
2680 | { | |
2681 | Self::deserialize_other() | |
2682 | } | |
2683 | )* | |
2684 | } | |
2685 | } | |
2686 | ||
0531ce1d XL |
2687 | #[cfg(any(feature = "std", feature = "alloc"))] |
2688 | impl<'a, 'de, E> Deserializer<'de> for FlatMapDeserializer<'a, 'de, E> | |
83c7162d XL |
2689 | where |
2690 | E: Error, | |
0531ce1d XL |
2691 | { |
2692 | type Error = E; | |
2693 | ||
8faf50e0 | 2694 | fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
0531ce1d XL |
2695 | where |
2696 | V: Visitor<'de>, | |
2697 | { | |
8faf50e0 XL |
2698 | visitor.visit_map(FlatInternallyTaggedAccess { |
2699 | iter: self.0.iter_mut(), | |
2700 | pending: None, | |
2701 | _marker: PhantomData, | |
2702 | }) | |
0531ce1d XL |
2703 | } |
2704 | ||
2705 | fn deserialize_enum<V>( | |
2706 | self, | |
2707 | name: &'static str, | |
2708 | variants: &'static [&'static str], | |
83c7162d | 2709 | visitor: V, |
0531ce1d XL |
2710 | ) -> Result<V::Value, Self::Error> |
2711 | where | |
2712 | V: Visitor<'de>, | |
2713 | { | |
2714 | for item in self.0.iter_mut() { | |
2715 | // items in the vector are nulled out when used. So we can only use | |
2716 | // an item if it's still filled in and if the field is one we care | |
2717 | // about. | |
2718 | let use_item = match *item { | |
2719 | None => false, | |
83c7162d | 2720 | Some((ref c, _)) => c.as_str().map_or(false, |x| variants.contains(&x)), |
0531ce1d XL |
2721 | }; |
2722 | ||
2723 | if use_item { | |
2724 | let (key, value) = item.take().unwrap(); | |
83c7162d | 2725 | return visitor.visit_enum(EnumDeserializer::new(key, Some(value))); |
0531ce1d XL |
2726 | } |
2727 | } | |
2728 | ||
2729 | Err(Error::custom(format_args!( | |
dc9dc135 | 2730 | "no variant of enum {} found in flattened data", |
0531ce1d XL |
2731 | name |
2732 | ))) | |
2733 | } | |
2734 | ||
2735 | fn deserialize_map<V>(self, visitor: V) -> Result<V::Value, Self::Error> | |
2736 | where | |
2737 | V: Visitor<'de>, | |
2738 | { | |
8faf50e0 | 2739 | visitor.visit_map(FlatMapAccess::new(self.0.iter())) |
0531ce1d XL |
2740 | } |
2741 | ||
2742 | fn deserialize_struct<V>( | |
2743 | self, | |
2744 | _: &'static str, | |
2745 | fields: &'static [&'static str], | |
83c7162d | 2746 | visitor: V, |
0531ce1d XL |
2747 | ) -> Result<V::Value, Self::Error> |
2748 | where | |
2749 | V: Visitor<'de>, | |
2750 | { | |
8faf50e0 | 2751 | visitor.visit_map(FlatStructAccess::new(self.0.iter_mut(), fields)) |
0531ce1d XL |
2752 | } |
2753 | ||
83c7162d | 2754 | fn deserialize_newtype_struct<V>(self, _name: &str, visitor: V) -> Result<V::Value, Self::Error> |
0531ce1d XL |
2755 | where |
2756 | V: Visitor<'de>, | |
2757 | { | |
2758 | visitor.visit_newtype_struct(self) | |
2759 | } | |
2760 | ||
8faf50e0 XL |
2761 | fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
2762 | where | |
2763 | V: Visitor<'de>, | |
2764 | { | |
2765 | match visitor.__private_visit_untagged_option(self) { | |
2766 | Ok(value) => Ok(value), | |
2767 | Err(()) => Self::deserialize_other(), | |
2768 | } | |
2769 | } | |
2770 | ||
3dfed10e XL |
2771 | fn deserialize_unit<V>(self, visitor: V) -> Result<V::Value, Self::Error> |
2772 | where | |
2773 | V: Visitor<'de>, | |
2774 | { | |
2775 | visitor.visit_unit() | |
2776 | } | |
2777 | ||
8faf50e0 XL |
2778 | forward_to_deserialize_other! { |
2779 | deserialize_bool() | |
2780 | deserialize_i8() | |
2781 | deserialize_i16() | |
2782 | deserialize_i32() | |
2783 | deserialize_i64() | |
2784 | deserialize_u8() | |
2785 | deserialize_u16() | |
2786 | deserialize_u32() | |
2787 | deserialize_u64() | |
2788 | deserialize_f32() | |
2789 | deserialize_f64() | |
2790 | deserialize_char() | |
2791 | deserialize_str() | |
2792 | deserialize_string() | |
2793 | deserialize_bytes() | |
2794 | deserialize_byte_buf() | |
8faf50e0 XL |
2795 | deserialize_unit_struct(&'static str) |
2796 | deserialize_seq() | |
2797 | deserialize_tuple(usize) | |
2798 | deserialize_tuple_struct(&'static str, usize) | |
2799 | deserialize_identifier() | |
2800 | deserialize_ignored_any() | |
0531ce1d XL |
2801 | } |
2802 | } | |
2803 | ||
2804 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2805 | pub struct FlatMapAccess<'a, 'de: 'a, E> { | |
8faf50e0 XL |
2806 | iter: slice::Iter<'a, Option<(Content<'de>, Content<'de>)>>, |
2807 | pending_content: Option<&'a Content<'de>>, | |
0531ce1d XL |
2808 | _marker: PhantomData<E>, |
2809 | } | |
2810 | ||
2811 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2812 | impl<'a, 'de, E> FlatMapAccess<'a, 'de, E> { | |
2813 | fn new( | |
8faf50e0 | 2814 | iter: slice::Iter<'a, Option<(Content<'de>, Content<'de>)>>, |
0531ce1d XL |
2815 | ) -> FlatMapAccess<'a, 'de, E> { |
2816 | FlatMapAccess { | |
2817 | iter: iter, | |
2818 | pending_content: None, | |
0531ce1d XL |
2819 | _marker: PhantomData, |
2820 | } | |
2821 | } | |
2822 | } | |
2823 | ||
2824 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2825 | impl<'a, 'de, E> MapAccess<'de> for FlatMapAccess<'a, 'de, E> | |
83c7162d XL |
2826 | where |
2827 | E: Error, | |
0531ce1d XL |
2828 | { |
2829 | type Error = E; | |
2830 | ||
8faf50e0 XL |
2831 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> |
2832 | where | |
2833 | T: DeserializeSeed<'de>, | |
2834 | { | |
2835 | while let Some(item) = self.iter.next() { | |
2836 | // Items in the vector are nulled out when used by a struct. | |
2837 | if let Some((ref key, ref content)) = *item { | |
2838 | self.pending_content = Some(content); | |
2839 | return seed.deserialize(ContentRefDeserializer::new(key)).map(Some); | |
2840 | } | |
2841 | } | |
2842 | Ok(None) | |
2843 | } | |
2844 | ||
2845 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> | |
2846 | where | |
2847 | T: DeserializeSeed<'de>, | |
2848 | { | |
2849 | match self.pending_content.take() { | |
2850 | Some(value) => seed.deserialize(ContentRefDeserializer::new(value)), | |
2851 | None => Err(Error::custom("value is missing")), | |
2852 | } | |
2853 | } | |
2854 | } | |
2855 | ||
2856 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2857 | pub struct FlatStructAccess<'a, 'de: 'a, E> { | |
2858 | iter: slice::IterMut<'a, Option<(Content<'de>, Content<'de>)>>, | |
2859 | pending_content: Option<Content<'de>>, | |
2860 | fields: &'static [&'static str], | |
2861 | _marker: PhantomData<E>, | |
2862 | } | |
2863 | ||
2864 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2865 | impl<'a, 'de, E> FlatStructAccess<'a, 'de, E> { | |
2866 | fn new( | |
2867 | iter: slice::IterMut<'a, Option<(Content<'de>, Content<'de>)>>, | |
2868 | fields: &'static [&'static str], | |
2869 | ) -> FlatStructAccess<'a, 'de, E> { | |
2870 | FlatStructAccess { | |
2871 | iter: iter, | |
2872 | pending_content: None, | |
2873 | fields: fields, | |
2874 | _marker: PhantomData, | |
2875 | } | |
2876 | } | |
2877 | } | |
2878 | ||
2879 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2880 | impl<'a, 'de, E> MapAccess<'de> for FlatStructAccess<'a, 'de, E> | |
2881 | where | |
2882 | E: Error, | |
2883 | { | |
2884 | type Error = E; | |
2885 | ||
0531ce1d XL |
2886 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> |
2887 | where | |
2888 | T: DeserializeSeed<'de>, | |
2889 | { | |
2890 | while let Some(item) = self.iter.next() { | |
2891 | // items in the vector are nulled out when used. So we can only use | |
2892 | // an item if it's still filled in and if the field is one we care | |
2893 | // about. In case we do not know which fields we want, we take them all. | |
2894 | let use_item = match *item { | |
2895 | None => false, | |
8faf50e0 | 2896 | Some((ref c, _)) => c.as_str().map_or(false, |key| self.fields.contains(&key)), |
0531ce1d XL |
2897 | }; |
2898 | ||
2899 | if use_item { | |
2900 | let (key, content) = item.take().unwrap(); | |
2901 | self.pending_content = Some(content); | |
2902 | return seed.deserialize(ContentDeserializer::new(key)).map(Some); | |
2903 | } | |
2904 | } | |
2905 | Ok(None) | |
2906 | } | |
2907 | ||
2908 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> | |
2909 | where | |
2910 | T: DeserializeSeed<'de>, | |
2911 | { | |
2912 | match self.pending_content.take() { | |
2913 | Some(value) => seed.deserialize(ContentDeserializer::new(value)), | |
2914 | None => Err(Error::custom("value is missing")), | |
2915 | } | |
2916 | } | |
2917 | } | |
8faf50e0 XL |
2918 | |
2919 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2920 | pub struct FlatInternallyTaggedAccess<'a, 'de: 'a, E> { | |
2921 | iter: slice::IterMut<'a, Option<(Content<'de>, Content<'de>)>>, | |
2922 | pending: Option<&'a Content<'de>>, | |
2923 | _marker: PhantomData<E>, | |
2924 | } | |
2925 | ||
2926 | #[cfg(any(feature = "std", feature = "alloc"))] | |
2927 | impl<'a, 'de, E> MapAccess<'de> for FlatInternallyTaggedAccess<'a, 'de, E> | |
2928 | where | |
2929 | E: Error, | |
2930 | { | |
2931 | type Error = E; | |
2932 | ||
2933 | fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> | |
2934 | where | |
2935 | T: DeserializeSeed<'de>, | |
2936 | { | |
0731742a XL |
2937 | while let Some(item) = self.iter.next() { |
2938 | if let Some((ref key, ref content)) = *item { | |
8faf50e0 XL |
2939 | // Do not take(), instead borrow this entry. The internally tagged |
2940 | // enum does its own buffering so we can't tell whether this entry | |
2941 | // is going to be consumed. Borrowing here leaves the entry | |
2942 | // available for later flattened fields. | |
8faf50e0 | 2943 | self.pending = Some(content); |
0731742a | 2944 | return seed.deserialize(ContentRefDeserializer::new(key)).map(Some); |
8faf50e0 | 2945 | } |
8faf50e0 | 2946 | } |
0731742a | 2947 | Ok(None) |
8faf50e0 XL |
2948 | } |
2949 | ||
2950 | fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> | |
2951 | where | |
2952 | T: DeserializeSeed<'de>, | |
2953 | { | |
2954 | match self.pending.take() { | |
2955 | Some(value) => seed.deserialize(ContentRefDeserializer::new(value)), | |
2956 | None => panic!("value is missing"), | |
2957 | } | |
2958 | } | |
2959 | } |