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Commit | Line | Data |
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041b39d2 XL |
1 | use lib::*; |
2 | ||
8faf50e0 XL |
3 | use de::{ |
4 | Deserialize, Deserializer, EnumAccess, Error, SeqAccess, Unexpected, VariantAccess, Visitor, | |
5 | }; | |
041b39d2 | 6 | |
5099ac24 | 7 | #[cfg(any(feature = "std", feature = "alloc", not(no_core_duration)))] |
041b39d2 XL |
8 | use de::MapAccess; |
9 | ||
5869c6ff | 10 | use seed::InPlaceSeed; |
041b39d2 XL |
11 | |
12 | #[cfg(any(feature = "std", feature = "alloc"))] | |
5869c6ff | 13 | use __private::size_hint; |
041b39d2 XL |
14 | |
15 | //////////////////////////////////////////////////////////////////////////////// | |
16 | ||
17 | struct UnitVisitor; | |
18 | ||
19 | impl<'de> Visitor<'de> for UnitVisitor { | |
20 | type Value = (); | |
21 | ||
22 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
23 | formatter.write_str("unit") | |
24 | } | |
25 | ||
8faf50e0 | 26 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
27 | where |
28 | E: Error, | |
29 | { | |
30 | Ok(()) | |
31 | } | |
32 | } | |
33 | ||
34 | impl<'de> Deserialize<'de> for () { | |
8faf50e0 | 35 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
36 | where |
37 | D: Deserializer<'de>, | |
38 | { | |
39 | deserializer.deserialize_unit(UnitVisitor) | |
40 | } | |
41 | } | |
42 | ||
8faf50e0 XL |
43 | #[cfg(feature = "unstable")] |
44 | impl<'de> Deserialize<'de> for ! { | |
45 | fn deserialize<D>(_deserializer: D) -> Result<Self, D::Error> | |
46 | where | |
47 | D: Deserializer<'de>, | |
48 | { | |
49 | Err(Error::custom("cannot deserialize `!`")) | |
50 | } | |
51 | } | |
52 | ||
041b39d2 XL |
53 | //////////////////////////////////////////////////////////////////////////////// |
54 | ||
55 | struct BoolVisitor; | |
56 | ||
57 | impl<'de> Visitor<'de> for BoolVisitor { | |
58 | type Value = bool; | |
59 | ||
60 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
61 | formatter.write_str("a boolean") | |
62 | } | |
63 | ||
8faf50e0 | 64 | fn visit_bool<E>(self, v: bool) -> Result<Self::Value, E> |
041b39d2 XL |
65 | where |
66 | E: Error, | |
67 | { | |
68 | Ok(v) | |
69 | } | |
70 | } | |
71 | ||
72 | impl<'de> Deserialize<'de> for bool { | |
8faf50e0 | 73 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
74 | where |
75 | D: Deserializer<'de>, | |
76 | { | |
77 | deserializer.deserialize_bool(BoolVisitor) | |
78 | } | |
79 | } | |
80 | ||
81 | //////////////////////////////////////////////////////////////////////////////// | |
82 | ||
041b39d2 | 83 | macro_rules! impl_deserialize_num { |
5099ac24 FG |
84 | ($primitive:ident, $nonzero:ident $(cfg($($cfg:tt)*))*, $deserialize:ident $($method:ident!($($val:ident : $visit:ident)*);)*) => { |
85 | impl_deserialize_num!($primitive, $deserialize $($method!($($val : $visit)*);)*); | |
86 | ||
87 | #[cfg(all(not(no_num_nonzero), $($($cfg)*)*))] | |
88 | impl<'de> Deserialize<'de> for num::$nonzero { | |
89 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
90 | where | |
91 | D: Deserializer<'de>, | |
92 | { | |
93 | struct NonZeroVisitor; | |
94 | ||
95 | impl<'de> Visitor<'de> for NonZeroVisitor { | |
96 | type Value = num::$nonzero; | |
97 | ||
98 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
99 | formatter.write_str(concat!("a nonzero ", stringify!($primitive))) | |
100 | } | |
101 | ||
102 | $($($method!(nonzero $primitive $val : $visit);)*)* | |
103 | } | |
104 | ||
105 | deserializer.$deserialize(NonZeroVisitor) | |
106 | } | |
107 | } | |
108 | }; | |
109 | ||
110 | ($primitive:ident, $deserialize:ident $($method:ident!($($val:ident : $visit:ident)*);)*) => { | |
111 | impl<'de> Deserialize<'de> for $primitive { | |
041b39d2 | 112 | #[inline] |
8faf50e0 | 113 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
114 | where |
115 | D: Deserializer<'de>, | |
116 | { | |
117 | struct PrimitiveVisitor; | |
118 | ||
119 | impl<'de> Visitor<'de> for PrimitiveVisitor { | |
5099ac24 | 120 | type Value = $primitive; |
041b39d2 XL |
121 | |
122 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
5099ac24 | 123 | formatter.write_str(stringify!($primitive)) |
041b39d2 XL |
124 | } |
125 | ||
5099ac24 | 126 | $($($method!($val : $visit);)*)* |
041b39d2 XL |
127 | } |
128 | ||
5869c6ff | 129 | deserializer.$deserialize(PrimitiveVisitor) |
041b39d2 XL |
130 | } |
131 | } | |
132 | }; | |
5869c6ff | 133 | } |
041b39d2 | 134 | |
5869c6ff XL |
135 | macro_rules! num_self { |
136 | ($ty:ident : $visit:ident) => { | |
137 | #[inline] | |
138 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
139 | where | |
140 | E: Error, | |
141 | { | |
142 | Ok(v) | |
143 | } | |
144 | }; | |
5099ac24 FG |
145 | |
146 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
147 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
148 | where | |
149 | E: Error, | |
150 | { | |
151 | if let Some(nonzero) = Self::Value::new(v) { | |
152 | Ok(nonzero) | |
153 | } else { | |
154 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) | |
155 | } | |
156 | } | |
157 | }; | |
5869c6ff | 158 | } |
041b39d2 | 159 | |
5869c6ff | 160 | macro_rules! num_as_self { |
5099ac24 FG |
161 | ($ty:ident : $visit:ident) => { |
162 | #[inline] | |
163 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
164 | where | |
165 | E: Error, | |
166 | { | |
167 | Ok(v as Self::Value) | |
168 | } | |
169 | }; | |
170 | ||
171 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
172 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
173 | where | |
174 | E: Error, | |
175 | { | |
176 | if let Some(nonzero) = Self::Value::new(v as $primitive) { | |
177 | Ok(nonzero) | |
178 | } else { | |
179 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) | |
5869c6ff | 180 | } |
5099ac24 | 181 | } |
041b39d2 | 182 | }; |
5869c6ff | 183 | } |
041b39d2 | 184 | |
5869c6ff | 185 | macro_rules! int_to_int { |
5099ac24 FG |
186 | ($ty:ident : $visit:ident) => { |
187 | #[inline] | |
188 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
189 | where | |
190 | E: Error, | |
191 | { | |
192 | if Self::Value::min_value() as i64 <= v as i64 | |
193 | && v as i64 <= Self::Value::max_value() as i64 | |
5869c6ff | 194 | { |
5099ac24 FG |
195 | Ok(v as Self::Value) |
196 | } else { | |
197 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) | |
198 | } | |
199 | } | |
200 | }; | |
201 | ||
202 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
203 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
204 | where | |
205 | E: Error, | |
206 | { | |
207 | if $primitive::min_value() as i64 <= v as i64 | |
208 | && v as i64 <= $primitive::max_value() as i64 | |
209 | { | |
210 | if let Some(nonzero) = Self::Value::new(v as $primitive) { | |
211 | return Ok(nonzero); | |
5869c6ff XL |
212 | } |
213 | } | |
5099ac24 FG |
214 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
215 | } | |
041b39d2 XL |
216 | }; |
217 | } | |
218 | ||
5869c6ff | 219 | macro_rules! int_to_uint { |
5099ac24 FG |
220 | ($ty:ident : $visit:ident) => { |
221 | #[inline] | |
222 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
223 | where | |
224 | E: Error, | |
225 | { | |
226 | if 0 <= v && v as u64 <= Self::Value::max_value() as u64 { | |
227 | Ok(v as Self::Value) | |
228 | } else { | |
229 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) | |
230 | } | |
231 | } | |
232 | }; | |
233 | ||
234 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
235 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
236 | where | |
237 | E: Error, | |
238 | { | |
239 | if 0 < v && v as u64 <= $primitive::max_value() as u64 { | |
240 | if let Some(nonzero) = Self::Value::new(v as $primitive) { | |
241 | return Ok(nonzero); | |
5869c6ff XL |
242 | } |
243 | } | |
5099ac24 FG |
244 | Err(Error::invalid_value(Unexpected::Signed(v as i64), &self)) |
245 | } | |
5869c6ff XL |
246 | }; |
247 | } | |
041b39d2 | 248 | |
5869c6ff | 249 | macro_rules! uint_to_self { |
5099ac24 FG |
250 | ($ty:ident : $visit:ident) => { |
251 | #[inline] | |
252 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
253 | where | |
254 | E: Error, | |
255 | { | |
256 | if v as u64 <= Self::Value::max_value() as u64 { | |
257 | Ok(v as Self::Value) | |
258 | } else { | |
259 | Err(Error::invalid_value(Unexpected::Unsigned(v as u64), &self)) | |
260 | } | |
261 | } | |
262 | }; | |
263 | ||
264 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
265 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
266 | where | |
267 | E: Error, | |
268 | { | |
269 | if v as u64 <= $primitive::max_value() as u64 { | |
270 | if let Some(nonzero) = Self::Value::new(v as $primitive) { | |
271 | return Ok(nonzero); | |
5869c6ff XL |
272 | } |
273 | } | |
5099ac24 FG |
274 | Err(Error::invalid_value(Unexpected::Unsigned(v as u64), &self)) |
275 | } | |
5869c6ff XL |
276 | }; |
277 | } | |
041b39d2 | 278 | |
5869c6ff | 279 | impl_deserialize_num! { |
5099ac24 | 280 | i8, NonZeroI8 cfg(not(no_num_nonzero_signed)), deserialize_i8 |
5869c6ff XL |
281 | num_self!(i8:visit_i8); |
282 | int_to_int!(i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
283 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
284 | } | |
041b39d2 | 285 | |
5869c6ff | 286 | impl_deserialize_num! { |
5099ac24 | 287 | i16, NonZeroI16 cfg(not(no_num_nonzero_signed)), deserialize_i16 |
5869c6ff XL |
288 | num_self!(i16:visit_i16); |
289 | num_as_self!(i8:visit_i8); | |
290 | int_to_int!(i32:visit_i32 i64:visit_i64); | |
291 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
292 | } | |
8faf50e0 | 293 | |
5869c6ff | 294 | impl_deserialize_num! { |
5099ac24 | 295 | i32, NonZeroI32 cfg(not(no_num_nonzero_signed)), deserialize_i32 |
5869c6ff XL |
296 | num_self!(i32:visit_i32); |
297 | num_as_self!(i8:visit_i8 i16:visit_i16); | |
298 | int_to_int!(i64:visit_i64); | |
299 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
300 | } | |
8faf50e0 | 301 | |
5869c6ff | 302 | impl_deserialize_num! { |
5099ac24 | 303 | i64, NonZeroI64 cfg(not(no_num_nonzero_signed)), deserialize_i64 |
5869c6ff XL |
304 | num_self!(i64:visit_i64); |
305 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32); | |
306 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
307 | } | |
8faf50e0 | 308 | |
5869c6ff | 309 | impl_deserialize_num! { |
5099ac24 | 310 | isize, NonZeroIsize cfg(not(no_num_nonzero_signed)), deserialize_i64 |
5869c6ff XL |
311 | num_as_self!(i8:visit_i8 i16:visit_i16); |
312 | int_to_int!(i32:visit_i32 i64:visit_i64); | |
313 | uint_to_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
314 | } | |
8faf50e0 | 315 | |
5869c6ff | 316 | impl_deserialize_num! { |
5099ac24 | 317 | u8, NonZeroU8, deserialize_u8 |
5869c6ff XL |
318 | num_self!(u8:visit_u8); |
319 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
320 | uint_to_self!(u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
321 | } | |
8faf50e0 | 322 | |
5869c6ff | 323 | impl_deserialize_num! { |
5099ac24 | 324 | u16, NonZeroU16, deserialize_u16 |
5869c6ff XL |
325 | num_self!(u16:visit_u16); |
326 | num_as_self!(u8:visit_u8); | |
327 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
328 | uint_to_self!(u32:visit_u32 u64:visit_u64); | |
329 | } | |
8faf50e0 | 330 | |
5869c6ff | 331 | impl_deserialize_num! { |
5099ac24 | 332 | u32, NonZeroU32, deserialize_u32 |
5869c6ff XL |
333 | num_self!(u32:visit_u32); |
334 | num_as_self!(u8:visit_u8 u16:visit_u16); | |
335 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
336 | uint_to_self!(u64:visit_u64); | |
337 | } | |
8faf50e0 | 338 | |
5869c6ff | 339 | impl_deserialize_num! { |
5099ac24 | 340 | u64, NonZeroU64, deserialize_u64 |
5869c6ff XL |
341 | num_self!(u64:visit_u64); |
342 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32); | |
343 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
344 | } | |
8faf50e0 | 345 | |
5869c6ff | 346 | impl_deserialize_num! { |
5099ac24 | 347 | usize, NonZeroUsize, deserialize_u64 |
5869c6ff XL |
348 | num_as_self!(u8:visit_u8 u16:visit_u16); |
349 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
350 | uint_to_self!(u32:visit_u32 u64:visit_u64); | |
351 | } | |
8faf50e0 | 352 | |
5869c6ff XL |
353 | impl_deserialize_num! { |
354 | f32, deserialize_f32 | |
355 | num_self!(f32:visit_f32); | |
356 | num_as_self!(f64:visit_f64); | |
357 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
358 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
359 | } | |
8faf50e0 | 360 | |
5869c6ff XL |
361 | impl_deserialize_num! { |
362 | f64, deserialize_f64 | |
363 | num_self!(f64:visit_f64); | |
364 | num_as_self!(f32:visit_f32); | |
365 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
366 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
367 | } | |
8faf50e0 | 368 | |
5869c6ff | 369 | serde_if_integer128! { |
5099ac24 FG |
370 | macro_rules! num_128 { |
371 | ($ty:ident : $visit:ident) => { | |
372 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
373 | where | |
374 | E: Error, | |
375 | { | |
376 | if v as i128 >= Self::Value::min_value() as i128 | |
377 | && v as u128 <= Self::Value::max_value() as u128 | |
378 | { | |
379 | Ok(v as Self::Value) | |
380 | } else { | |
381 | Err(Error::invalid_value( | |
382 | Unexpected::Other(stringify!($ty)), | |
383 | &self, | |
384 | )) | |
385 | } | |
386 | } | |
387 | }; | |
388 | ||
389 | (nonzero $primitive:ident $ty:ident : $visit:ident) => { | |
390 | fn $visit<E>(self, v: $ty) -> Result<Self::Value, E> | |
391 | where | |
392 | E: Error, | |
393 | { | |
394 | if v as i128 >= $primitive::min_value() as i128 | |
395 | && v as u128 <= $primitive::max_value() as u128 | |
396 | { | |
397 | if let Some(nonzero) = Self::Value::new(v as $primitive) { | |
398 | Ok(nonzero) | |
399 | } else { | |
400 | Err(Error::invalid_value(Unexpected::Unsigned(0), &self)) | |
401 | } | |
402 | } else { | |
403 | Err(Error::invalid_value( | |
404 | Unexpected::Other(stringify!($ty)), | |
405 | &self, | |
406 | )) | |
407 | } | |
408 | } | |
409 | }; | |
410 | } | |
411 | ||
5869c6ff | 412 | impl_deserialize_num! { |
5099ac24 | 413 | i128, NonZeroI128 cfg(not(no_num_nonzero_signed)), deserialize_i128 |
5869c6ff XL |
414 | num_self!(i128:visit_i128); |
415 | num_as_self!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
416 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
5099ac24 | 417 | num_128!(u128:visit_u128); |
5869c6ff XL |
418 | } |
419 | ||
420 | impl_deserialize_num! { | |
5099ac24 | 421 | u128, NonZeroU128, deserialize_u128 |
5869c6ff XL |
422 | num_self!(u128:visit_u128); |
423 | num_as_self!(u8:visit_u8 u16:visit_u16 u32:visit_u32 u64:visit_u64); | |
424 | int_to_uint!(i8:visit_i8 i16:visit_i16 i32:visit_i32 i64:visit_i64); | |
5099ac24 | 425 | num_128!(i128:visit_i128); |
8faf50e0 XL |
426 | } |
427 | } | |
428 | ||
041b39d2 XL |
429 | //////////////////////////////////////////////////////////////////////////////// |
430 | ||
431 | struct CharVisitor; | |
432 | ||
433 | impl<'de> Visitor<'de> for CharVisitor { | |
434 | type Value = char; | |
435 | ||
436 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
437 | formatter.write_str("a character") | |
438 | } | |
439 | ||
440 | #[inline] | |
8faf50e0 | 441 | fn visit_char<E>(self, v: char) -> Result<Self::Value, E> |
041b39d2 XL |
442 | where |
443 | E: Error, | |
444 | { | |
445 | Ok(v) | |
446 | } | |
447 | ||
448 | #[inline] | |
8faf50e0 | 449 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
450 | where |
451 | E: Error, | |
452 | { | |
453 | let mut iter = v.chars(); | |
454 | match (iter.next(), iter.next()) { | |
455 | (Some(c), None) => Ok(c), | |
456 | _ => Err(Error::invalid_value(Unexpected::Str(v), &self)), | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | impl<'de> Deserialize<'de> for char { | |
462 | #[inline] | |
8faf50e0 | 463 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
464 | where |
465 | D: Deserializer<'de>, | |
466 | { | |
467 | deserializer.deserialize_char(CharVisitor) | |
468 | } | |
469 | } | |
470 | ||
471 | //////////////////////////////////////////////////////////////////////////////// | |
472 | ||
473 | #[cfg(any(feature = "std", feature = "alloc"))] | |
474 | struct StringVisitor; | |
ff7c6d11 XL |
475 | #[cfg(any(feature = "std", feature = "alloc"))] |
476 | struct StringInPlaceVisitor<'a>(&'a mut String); | |
041b39d2 XL |
477 | |
478 | #[cfg(any(feature = "std", feature = "alloc"))] | |
479 | impl<'de> Visitor<'de> for StringVisitor { | |
480 | type Value = String; | |
481 | ||
482 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
483 | formatter.write_str("a string") | |
484 | } | |
485 | ||
8faf50e0 | 486 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
487 | where |
488 | E: Error, | |
489 | { | |
490 | Ok(v.to_owned()) | |
491 | } | |
492 | ||
8faf50e0 | 493 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
494 | where |
495 | E: Error, | |
496 | { | |
497 | Ok(v) | |
498 | } | |
499 | ||
8faf50e0 | 500 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
501 | where |
502 | E: Error, | |
503 | { | |
504 | match str::from_utf8(v) { | |
505 | Ok(s) => Ok(s.to_owned()), | |
506 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
507 | } | |
508 | } | |
509 | ||
8faf50e0 | 510 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
041b39d2 XL |
511 | where |
512 | E: Error, | |
513 | { | |
514 | match String::from_utf8(v) { | |
515 | Ok(s) => Ok(s), | |
ff7c6d11 XL |
516 | Err(e) => Err(Error::invalid_value( |
517 | Unexpected::Bytes(&e.into_bytes()), | |
518 | &self, | |
519 | )), | |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | #[cfg(any(feature = "std", feature = "alloc"))] | |
525 | impl<'a, 'de> Visitor<'de> for StringInPlaceVisitor<'a> { | |
526 | type Value = (); | |
527 | ||
528 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
529 | formatter.write_str("a string") | |
530 | } | |
531 | ||
8faf50e0 | 532 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
ff7c6d11 XL |
533 | where |
534 | E: Error, | |
535 | { | |
536 | self.0.clear(); | |
537 | self.0.push_str(v); | |
538 | Ok(()) | |
539 | } | |
540 | ||
8faf50e0 | 541 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
ff7c6d11 XL |
542 | where |
543 | E: Error, | |
544 | { | |
545 | *self.0 = v; | |
546 | Ok(()) | |
547 | } | |
548 | ||
8faf50e0 | 549 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
ff7c6d11 XL |
550 | where |
551 | E: Error, | |
552 | { | |
553 | match str::from_utf8(v) { | |
554 | Ok(s) => { | |
555 | self.0.clear(); | |
556 | self.0.push_str(s); | |
557 | Ok(()) | |
558 | } | |
559 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(v), &self)), | |
560 | } | |
561 | } | |
562 | ||
8faf50e0 | 563 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
ff7c6d11 XL |
564 | where |
565 | E: Error, | |
566 | { | |
567 | match String::from_utf8(v) { | |
568 | Ok(s) => { | |
569 | *self.0 = s; | |
570 | Ok(()) | |
571 | } | |
572 | Err(e) => Err(Error::invalid_value( | |
573 | Unexpected::Bytes(&e.into_bytes()), | |
574 | &self, | |
575 | )), | |
041b39d2 XL |
576 | } |
577 | } | |
578 | } | |
579 | ||
580 | #[cfg(any(feature = "std", feature = "alloc"))] | |
581 | impl<'de> Deserialize<'de> for String { | |
8faf50e0 | 582 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
583 | where |
584 | D: Deserializer<'de>, | |
585 | { | |
586 | deserializer.deserialize_string(StringVisitor) | |
587 | } | |
ff7c6d11 XL |
588 | |
589 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
590 | where | |
591 | D: Deserializer<'de>, | |
592 | { | |
593 | deserializer.deserialize_string(StringInPlaceVisitor(place)) | |
594 | } | |
041b39d2 XL |
595 | } |
596 | ||
597 | //////////////////////////////////////////////////////////////////////////////// | |
598 | ||
599 | struct StrVisitor; | |
600 | ||
601 | impl<'a> Visitor<'a> for StrVisitor { | |
602 | type Value = &'a str; | |
603 | ||
604 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
605 | formatter.write_str("a borrowed string") | |
606 | } | |
607 | ||
608 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
609 | where | |
610 | E: Error, | |
611 | { | |
612 | Ok(v) // so easy | |
613 | } | |
614 | ||
615 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
616 | where | |
617 | E: Error, | |
618 | { | |
619 | str::from_utf8(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
620 | } | |
621 | } | |
622 | ||
623 | impl<'de: 'a, 'a> Deserialize<'de> for &'a str { | |
624 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
625 | where | |
626 | D: Deserializer<'de>, | |
627 | { | |
628 | deserializer.deserialize_str(StrVisitor) | |
629 | } | |
630 | } | |
631 | ||
632 | //////////////////////////////////////////////////////////////////////////////// | |
633 | ||
634 | struct BytesVisitor; | |
635 | ||
636 | impl<'a> Visitor<'a> for BytesVisitor { | |
637 | type Value = &'a [u8]; | |
638 | ||
639 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
640 | formatter.write_str("a borrowed byte array") | |
641 | } | |
642 | ||
643 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
644 | where | |
645 | E: Error, | |
646 | { | |
647 | Ok(v) | |
648 | } | |
649 | ||
650 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
651 | where | |
652 | E: Error, | |
653 | { | |
654 | Ok(v.as_bytes()) | |
655 | } | |
656 | } | |
657 | ||
658 | impl<'de: 'a, 'a> Deserialize<'de> for &'a [u8] { | |
659 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
660 | where | |
661 | D: Deserializer<'de>, | |
662 | { | |
663 | deserializer.deserialize_bytes(BytesVisitor) | |
664 | } | |
665 | } | |
666 | ||
667 | //////////////////////////////////////////////////////////////////////////////// | |
668 | ||
669 | #[cfg(feature = "std")] | |
670 | struct CStringVisitor; | |
671 | ||
672 | #[cfg(feature = "std")] | |
673 | impl<'de> Visitor<'de> for CStringVisitor { | |
674 | type Value = CString; | |
675 | ||
676 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
677 | formatter.write_str("byte array") | |
678 | } | |
679 | ||
8faf50e0 | 680 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
681 | where |
682 | A: SeqAccess<'de>, | |
683 | { | |
684 | let len = size_hint::cautious(seq.size_hint()); | |
685 | let mut values = Vec::with_capacity(len); | |
686 | ||
687 | while let Some(value) = try!(seq.next_element()) { | |
688 | values.push(value); | |
689 | } | |
690 | ||
691 | CString::new(values).map_err(Error::custom) | |
692 | } | |
693 | ||
8faf50e0 | 694 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
695 | where |
696 | E: Error, | |
697 | { | |
698 | CString::new(v).map_err(Error::custom) | |
699 | } | |
700 | ||
8faf50e0 | 701 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> |
041b39d2 XL |
702 | where |
703 | E: Error, | |
704 | { | |
705 | CString::new(v).map_err(Error::custom) | |
706 | } | |
707 | ||
8faf50e0 | 708 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
709 | where |
710 | E: Error, | |
711 | { | |
712 | CString::new(v).map_err(Error::custom) | |
713 | } | |
714 | ||
8faf50e0 | 715 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
716 | where |
717 | E: Error, | |
718 | { | |
719 | CString::new(v).map_err(Error::custom) | |
720 | } | |
721 | } | |
722 | ||
723 | #[cfg(feature = "std")] | |
724 | impl<'de> Deserialize<'de> for CString { | |
8faf50e0 | 725 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
726 | where |
727 | D: Deserializer<'de>, | |
728 | { | |
729 | deserializer.deserialize_byte_buf(CStringVisitor) | |
730 | } | |
731 | } | |
732 | ||
3b2f2976 | 733 | macro_rules! forwarded_impl { |
83c7162d XL |
734 | ( |
735 | $(#[doc = $doc:tt])* | |
736 | ( $($id: ident),* ), $ty: ty, $func: expr | |
737 | ) => { | |
738 | $(#[doc = $doc])* | |
3b2f2976 XL |
739 | impl<'de $(, $id : Deserialize<'de>,)*> Deserialize<'de> for $ty { |
740 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
741 | where | |
742 | D: Deserializer<'de>, | |
743 | { | |
744 | Deserialize::deserialize(deserializer).map($func) | |
745 | } | |
746 | } | |
041b39d2 XL |
747 | } |
748 | } | |
749 | ||
5099ac24 | 750 | #[cfg(all(feature = "std", not(no_de_boxed_c_str)))] |
3b2f2976 XL |
751 | forwarded_impl!((), Box<CStr>, CString::into_boxed_c_str); |
752 | ||
5099ac24 | 753 | #[cfg(not(no_core_reverse))] |
dc9dc135 XL |
754 | forwarded_impl!((T), Reverse<T>, Reverse); |
755 | ||
041b39d2 XL |
756 | //////////////////////////////////////////////////////////////////////////////// |
757 | ||
758 | struct OptionVisitor<T> { | |
759 | marker: PhantomData<T>, | |
760 | } | |
761 | ||
762 | impl<'de, T> Visitor<'de> for OptionVisitor<T> | |
763 | where | |
764 | T: Deserialize<'de>, | |
765 | { | |
766 | type Value = Option<T>; | |
767 | ||
768 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
769 | formatter.write_str("option") | |
770 | } | |
771 | ||
772 | #[inline] | |
8faf50e0 | 773 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
774 | where |
775 | E: Error, | |
776 | { | |
777 | Ok(None) | |
778 | } | |
779 | ||
780 | #[inline] | |
8faf50e0 | 781 | fn visit_none<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
782 | where |
783 | E: Error, | |
784 | { | |
785 | Ok(None) | |
786 | } | |
787 | ||
788 | #[inline] | |
8faf50e0 | 789 | fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error> |
041b39d2 XL |
790 | where |
791 | D: Deserializer<'de>, | |
792 | { | |
793 | T::deserialize(deserializer).map(Some) | |
794 | } | |
8faf50e0 | 795 | |
8faf50e0 XL |
796 | fn __private_visit_untagged_option<D>(self, deserializer: D) -> Result<Self::Value, ()> |
797 | where | |
798 | D: Deserializer<'de>, | |
799 | { | |
800 | Ok(T::deserialize(deserializer).ok()) | |
801 | } | |
041b39d2 XL |
802 | } |
803 | ||
804 | impl<'de, T> Deserialize<'de> for Option<T> | |
805 | where | |
806 | T: Deserialize<'de>, | |
807 | { | |
8faf50e0 | 808 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
809 | where |
810 | D: Deserializer<'de>, | |
811 | { | |
ff7c6d11 XL |
812 | deserializer.deserialize_option(OptionVisitor { |
813 | marker: PhantomData, | |
814 | }) | |
041b39d2 | 815 | } |
ff7c6d11 XL |
816 | |
817 | // The Some variant's repr is opaque, so we can't play cute tricks with its | |
818 | // tag to have deserialize_in_place build the content in place unconditionally. | |
819 | // | |
820 | // FIXME: investigate whether branching on the old value being Some to | |
821 | // deserialize_in_place the value is profitable (probably data-dependent?) | |
041b39d2 XL |
822 | } |
823 | ||
824 | //////////////////////////////////////////////////////////////////////////////// | |
825 | ||
2c00a5a8 | 826 | struct PhantomDataVisitor<T: ?Sized> { |
041b39d2 XL |
827 | marker: PhantomData<T>, |
828 | } | |
829 | ||
2c00a5a8 | 830 | impl<'de, T: ?Sized> Visitor<'de> for PhantomDataVisitor<T> { |
041b39d2 XL |
831 | type Value = PhantomData<T>; |
832 | ||
833 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
834 | formatter.write_str("unit") | |
835 | } | |
836 | ||
837 | #[inline] | |
8faf50e0 | 838 | fn visit_unit<E>(self) -> Result<Self::Value, E> |
041b39d2 XL |
839 | where |
840 | E: Error, | |
841 | { | |
842 | Ok(PhantomData) | |
843 | } | |
844 | } | |
845 | ||
2c00a5a8 | 846 | impl<'de, T: ?Sized> Deserialize<'de> for PhantomData<T> { |
8faf50e0 | 847 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
848 | where |
849 | D: Deserializer<'de>, | |
850 | { | |
ff7c6d11 XL |
851 | let visitor = PhantomDataVisitor { |
852 | marker: PhantomData, | |
853 | }; | |
041b39d2 XL |
854 | deserializer.deserialize_unit_struct("PhantomData", visitor) |
855 | } | |
856 | } | |
857 | ||
858 | //////////////////////////////////////////////////////////////////////////////// | |
859 | ||
860 | #[cfg(any(feature = "std", feature = "alloc"))] | |
861 | macro_rules! seq_impl { | |
862 | ( | |
863 | $ty:ident < T $(: $tbound1:ident $(+ $tbound2:ident)*)* $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
864 | $access:ident, | |
ff7c6d11 | 865 | $clear:expr, |
041b39d2 | 866 | $with_capacity:expr, |
ff7c6d11 | 867 | $reserve:expr, |
041b39d2 XL |
868 | $insert:expr |
869 | ) => { | |
870 | impl<'de, T $(, $typaram)*> Deserialize<'de> for $ty<T $(, $typaram)*> | |
871 | where | |
872 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
873 | $($typaram: $bound1 $(+ $bound2)*,)* | |
874 | { | |
875 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
876 | where | |
877 | D: Deserializer<'de>, | |
878 | { | |
879 | struct SeqVisitor<T $(, $typaram)*> { | |
880 | marker: PhantomData<$ty<T $(, $typaram)*>>, | |
881 | } | |
882 | ||
883 | impl<'de, T $(, $typaram)*> Visitor<'de> for SeqVisitor<T $(, $typaram)*> | |
884 | where | |
885 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
886 | $($typaram: $bound1 $(+ $bound2)*,)* | |
887 | { | |
888 | type Value = $ty<T $(, $typaram)*>; | |
889 | ||
890 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
891 | formatter.write_str("a sequence") | |
892 | } | |
893 | ||
894 | #[inline] | |
895 | fn visit_seq<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
896 | where | |
897 | A: SeqAccess<'de>, | |
898 | { | |
899 | let mut values = $with_capacity; | |
900 | ||
901 | while let Some(value) = try!($access.next_element()) { | |
902 | $insert(&mut values, value); | |
903 | } | |
904 | ||
905 | Ok(values) | |
906 | } | |
907 | } | |
908 | ||
909 | let visitor = SeqVisitor { marker: PhantomData }; | |
910 | deserializer.deserialize_seq(visitor) | |
911 | } | |
ff7c6d11 XL |
912 | |
913 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
914 | where | |
915 | D: Deserializer<'de>, | |
916 | { | |
917 | struct SeqInPlaceVisitor<'a, T: 'a $(, $typaram: 'a)*>(&'a mut $ty<T $(, $typaram)*>); | |
918 | ||
919 | impl<'a, 'de, T $(, $typaram)*> Visitor<'de> for SeqInPlaceVisitor<'a, T $(, $typaram)*> | |
920 | where | |
921 | T: Deserialize<'de> $(+ $tbound1 $(+ $tbound2)*)*, | |
922 | $($typaram: $bound1 $(+ $bound2)*,)* | |
923 | { | |
924 | type Value = (); | |
925 | ||
926 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
927 | formatter.write_str("a sequence") | |
928 | } | |
929 | ||
930 | #[inline] | |
8faf50e0 | 931 | fn visit_seq<A>(mut self, mut $access: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
932 | where |
933 | A: SeqAccess<'de>, | |
934 | { | |
935 | $clear(&mut self.0); | |
936 | $reserve(&mut self.0, size_hint::cautious($access.size_hint())); | |
937 | ||
938 | // FIXME: try to overwrite old values here? (Vec, VecDeque, LinkedList) | |
939 | while let Some(value) = try!($access.next_element()) { | |
940 | $insert(&mut self.0, value); | |
941 | } | |
942 | ||
943 | Ok(()) | |
944 | } | |
945 | } | |
946 | ||
947 | deserializer.deserialize_seq(SeqInPlaceVisitor(place)) | |
948 | } | |
041b39d2 XL |
949 | } |
950 | } | |
951 | } | |
952 | ||
ff7c6d11 XL |
953 | // Dummy impl of reserve |
954 | #[cfg(any(feature = "std", feature = "alloc"))] | |
955 | fn nop_reserve<T>(_seq: T, _n: usize) {} | |
956 | ||
041b39d2 XL |
957 | #[cfg(any(feature = "std", feature = "alloc"))] |
958 | seq_impl!( | |
959 | BinaryHeap<T: Ord>, | |
960 | seq, | |
ff7c6d11 | 961 | BinaryHeap::clear, |
041b39d2 | 962 | BinaryHeap::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 | 963 | BinaryHeap::reserve, |
e1599b0c XL |
964 | BinaryHeap::push |
965 | ); | |
041b39d2 XL |
966 | |
967 | #[cfg(any(feature = "std", feature = "alloc"))] | |
968 | seq_impl!( | |
969 | BTreeSet<T: Eq + Ord>, | |
970 | seq, | |
ff7c6d11 | 971 | BTreeSet::clear, |
041b39d2 | 972 | BTreeSet::new(), |
ff7c6d11 | 973 | nop_reserve, |
e1599b0c XL |
974 | BTreeSet::insert |
975 | ); | |
041b39d2 XL |
976 | |
977 | #[cfg(any(feature = "std", feature = "alloc"))] | |
978 | seq_impl!( | |
979 | LinkedList<T>, | |
980 | seq, | |
ff7c6d11 | 981 | LinkedList::clear, |
041b39d2 | 982 | LinkedList::new(), |
ff7c6d11 XL |
983 | nop_reserve, |
984 | LinkedList::push_back | |
985 | ); | |
041b39d2 XL |
986 | |
987 | #[cfg(feature = "std")] | |
988 | seq_impl!( | |
989 | HashSet<T: Eq + Hash, S: BuildHasher + Default>, | |
990 | seq, | |
ff7c6d11 | 991 | HashSet::clear, |
041b39d2 | 992 | HashSet::with_capacity_and_hasher(size_hint::cautious(seq.size_hint()), S::default()), |
ff7c6d11 | 993 | HashSet::reserve, |
041b39d2 XL |
994 | HashSet::insert); |
995 | ||
041b39d2 XL |
996 | #[cfg(any(feature = "std", feature = "alloc"))] |
997 | seq_impl!( | |
998 | VecDeque<T>, | |
999 | seq, | |
ff7c6d11 | 1000 | VecDeque::clear, |
041b39d2 | 1001 | VecDeque::with_capacity(size_hint::cautious(seq.size_hint())), |
ff7c6d11 XL |
1002 | VecDeque::reserve, |
1003 | VecDeque::push_back | |
1004 | ); | |
041b39d2 XL |
1005 | |
1006 | //////////////////////////////////////////////////////////////////////////////// | |
1007 | ||
0731742a XL |
1008 | #[cfg(any(feature = "std", feature = "alloc"))] |
1009 | impl<'de, T> Deserialize<'de> for Vec<T> | |
1010 | where | |
1011 | T: Deserialize<'de>, | |
1012 | { | |
1013 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1014 | where | |
1015 | D: Deserializer<'de>, | |
1016 | { | |
1017 | struct VecVisitor<T> { | |
1018 | marker: PhantomData<T>, | |
1019 | } | |
1020 | ||
1021 | impl<'de, T> Visitor<'de> for VecVisitor<T> | |
1022 | where | |
1023 | T: Deserialize<'de>, | |
1024 | { | |
1025 | type Value = Vec<T>; | |
1026 | ||
1027 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1028 | formatter.write_str("a sequence") | |
1029 | } | |
1030 | ||
1031 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> | |
1032 | where | |
1033 | A: SeqAccess<'de>, | |
1034 | { | |
1035 | let mut values = Vec::with_capacity(size_hint::cautious(seq.size_hint())); | |
1036 | ||
1037 | while let Some(value) = try!(seq.next_element()) { | |
1038 | values.push(value); | |
1039 | } | |
1040 | ||
1041 | Ok(values) | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | let visitor = VecVisitor { | |
1046 | marker: PhantomData, | |
1047 | }; | |
1048 | deserializer.deserialize_seq(visitor) | |
1049 | } | |
1050 | ||
1051 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
1052 | where | |
1053 | D: Deserializer<'de>, | |
1054 | { | |
1055 | struct VecInPlaceVisitor<'a, T: 'a>(&'a mut Vec<T>); | |
1056 | ||
1057 | impl<'a, 'de, T> Visitor<'de> for VecInPlaceVisitor<'a, T> | |
1058 | where | |
1059 | T: Deserialize<'de>, | |
1060 | { | |
1061 | type Value = (); | |
1062 | ||
1063 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1064 | formatter.write_str("a sequence") | |
1065 | } | |
1066 | ||
1067 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> | |
1068 | where | |
1069 | A: SeqAccess<'de>, | |
1070 | { | |
1071 | let hint = size_hint::cautious(seq.size_hint()); | |
1072 | if let Some(additional) = hint.checked_sub(self.0.len()) { | |
1073 | self.0.reserve(additional); | |
1074 | } | |
1075 | ||
1076 | for i in 0..self.0.len() { | |
1077 | let next = { | |
1078 | let next_place = InPlaceSeed(&mut self.0[i]); | |
1079 | try!(seq.next_element_seed(next_place)) | |
1080 | }; | |
1081 | if next.is_none() { | |
1082 | self.0.truncate(i); | |
1083 | return Ok(()); | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | while let Some(value) = try!(seq.next_element()) { | |
1088 | self.0.push(value); | |
1089 | } | |
1090 | ||
1091 | Ok(()) | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | deserializer.deserialize_seq(VecInPlaceVisitor(place)) | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | //////////////////////////////////////////////////////////////////////////////// | |
1100 | ||
041b39d2 XL |
1101 | struct ArrayVisitor<A> { |
1102 | marker: PhantomData<A>, | |
1103 | } | |
ff7c6d11 | 1104 | struct ArrayInPlaceVisitor<'a, A: 'a>(&'a mut A); |
041b39d2 XL |
1105 | |
1106 | impl<A> ArrayVisitor<A> { | |
1107 | fn new() -> Self { | |
ff7c6d11 XL |
1108 | ArrayVisitor { |
1109 | marker: PhantomData, | |
1110 | } | |
041b39d2 XL |
1111 | } |
1112 | } | |
1113 | ||
1114 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; 0]> { | |
1115 | type Value = [T; 0]; | |
1116 | ||
1117 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1118 | formatter.write_str("an empty array") | |
1119 | } | |
1120 | ||
1121 | #[inline] | |
8faf50e0 | 1122 | fn visit_seq<A>(self, _: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1123 | where |
1124 | A: SeqAccess<'de>, | |
1125 | { | |
1126 | Ok([]) | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | // Does not require T: Deserialize<'de>. | |
1131 | impl<'de, T> Deserialize<'de> for [T; 0] { | |
8faf50e0 | 1132 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1133 | where |
1134 | D: Deserializer<'de>, | |
1135 | { | |
1136 | deserializer.deserialize_tuple(0, ArrayVisitor::<[T; 0]>::new()) | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | macro_rules! array_impls { | |
dc9dc135 | 1141 | ($($len:expr => ($($n:tt)+))+) => { |
041b39d2 XL |
1142 | $( |
1143 | impl<'de, T> Visitor<'de> for ArrayVisitor<[T; $len]> | |
1144 | where | |
1145 | T: Deserialize<'de>, | |
1146 | { | |
1147 | type Value = [T; $len]; | |
1148 | ||
1149 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1150 | formatter.write_str(concat!("an array of length ", $len)) | |
1151 | } | |
1152 | ||
1153 | #[inline] | |
8faf50e0 | 1154 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1155 | where |
1156 | A: SeqAccess<'de>, | |
1157 | { | |
dc9dc135 XL |
1158 | Ok([$( |
1159 | match try!(seq.next_element()) { | |
041b39d2 XL |
1160 | Some(val) => val, |
1161 | None => return Err(Error::invalid_length($n, &self)), | |
dc9dc135 XL |
1162 | } |
1163 | ),+]) | |
041b39d2 XL |
1164 | } |
1165 | } | |
1166 | ||
ff7c6d11 XL |
1167 | impl<'a, 'de, T> Visitor<'de> for ArrayInPlaceVisitor<'a, [T; $len]> |
1168 | where | |
1169 | T: Deserialize<'de>, | |
1170 | { | |
1171 | type Value = (); | |
1172 | ||
1173 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1174 | formatter.write_str(concat!("an array of length ", $len)) | |
1175 | } | |
1176 | ||
1177 | #[inline] | |
8faf50e0 | 1178 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1179 | where |
1180 | A: SeqAccess<'de>, | |
1181 | { | |
1182 | let mut fail_idx = None; | |
1183 | for (idx, dest) in self.0[..].iter_mut().enumerate() { | |
1184 | if try!(seq.next_element_seed(InPlaceSeed(dest))).is_none() { | |
1185 | fail_idx = Some(idx); | |
1186 | break; | |
1187 | } | |
1188 | } | |
1189 | if let Some(idx) = fail_idx { | |
1190 | return Err(Error::invalid_length(idx, &self)); | |
1191 | } | |
1192 | Ok(()) | |
1193 | } | |
1194 | } | |
1195 | ||
041b39d2 XL |
1196 | impl<'de, T> Deserialize<'de> for [T; $len] |
1197 | where | |
1198 | T: Deserialize<'de>, | |
1199 | { | |
8faf50e0 | 1200 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1201 | where |
1202 | D: Deserializer<'de>, | |
1203 | { | |
1204 | deserializer.deserialize_tuple($len, ArrayVisitor::<[T; $len]>::new()) | |
1205 | } | |
ff7c6d11 XL |
1206 | |
1207 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> | |
1208 | where | |
1209 | D: Deserializer<'de>, | |
1210 | { | |
1211 | deserializer.deserialize_tuple($len, ArrayInPlaceVisitor(place)) | |
1212 | } | |
041b39d2 XL |
1213 | } |
1214 | )+ | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | array_impls! { | |
dc9dc135 XL |
1219 | 1 => (0) |
1220 | 2 => (0 1) | |
1221 | 3 => (0 1 2) | |
1222 | 4 => (0 1 2 3) | |
1223 | 5 => (0 1 2 3 4) | |
1224 | 6 => (0 1 2 3 4 5) | |
1225 | 7 => (0 1 2 3 4 5 6) | |
1226 | 8 => (0 1 2 3 4 5 6 7) | |
1227 | 9 => (0 1 2 3 4 5 6 7 8) | |
1228 | 10 => (0 1 2 3 4 5 6 7 8 9) | |
1229 | 11 => (0 1 2 3 4 5 6 7 8 9 10) | |
1230 | 12 => (0 1 2 3 4 5 6 7 8 9 10 11) | |
1231 | 13 => (0 1 2 3 4 5 6 7 8 9 10 11 12) | |
1232 | 14 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13) | |
1233 | 15 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14) | |
1234 | 16 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15) | |
1235 | 17 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16) | |
1236 | 18 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17) | |
1237 | 19 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18) | |
1238 | 20 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19) | |
1239 | 21 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20) | |
1240 | 22 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21) | |
1241 | 23 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22) | |
1242 | 24 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23) | |
1243 | 25 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24) | |
1244 | 26 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25) | |
1245 | 27 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26) | |
1246 | 28 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27) | |
1247 | 29 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28) | |
1248 | 30 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29) | |
1249 | 31 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30) | |
1250 | 32 => (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31) | |
041b39d2 XL |
1251 | } |
1252 | ||
1253 | //////////////////////////////////////////////////////////////////////////////// | |
1254 | ||
1255 | macro_rules! tuple_impls { | |
ff7c6d11 | 1256 | ($($len:tt => ($($n:tt $name:ident)+))+) => { |
041b39d2 | 1257 | $( |
ff7c6d11 XL |
1258 | impl<'de, $($name: Deserialize<'de>),+> Deserialize<'de> for ($($name,)+) { |
1259 | #[inline] | |
8faf50e0 | 1260 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
ff7c6d11 XL |
1261 | where |
1262 | D: Deserializer<'de>, | |
1263 | { | |
1264 | struct TupleVisitor<$($name,)+> { | |
1265 | marker: PhantomData<($($name,)+)>, | |
1266 | } | |
041b39d2 | 1267 | |
ff7c6d11 XL |
1268 | impl<'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleVisitor<$($name,)+> { |
1269 | type Value = ($($name,)+); | |
041b39d2 | 1270 | |
ff7c6d11 XL |
1271 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { |
1272 | formatter.write_str(concat!("a tuple of size ", $len)) | |
1273 | } | |
041b39d2 | 1274 | |
ff7c6d11 XL |
1275 | #[inline] |
1276 | #[allow(non_snake_case)] | |
8faf50e0 | 1277 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1278 | where |
1279 | A: SeqAccess<'de>, | |
1280 | { | |
1281 | $( | |
1282 | let $name = match try!(seq.next_element()) { | |
1283 | Some(value) => value, | |
1284 | None => return Err(Error::invalid_length($n, &self)), | |
1285 | }; | |
1286 | )+ | |
041b39d2 | 1287 | |
ff7c6d11 XL |
1288 | Ok(($($name,)+)) |
1289 | } | |
1290 | } | |
041b39d2 | 1291 | |
ff7c6d11 | 1292 | deserializer.deserialize_tuple($len, TupleVisitor { marker: PhantomData }) |
041b39d2 | 1293 | } |
041b39d2 | 1294 | |
041b39d2 | 1295 | #[inline] |
ff7c6d11 | 1296 | fn deserialize_in_place<D>(deserializer: D, place: &mut Self) -> Result<(), D::Error> |
041b39d2 XL |
1297 | where |
1298 | D: Deserializer<'de>, | |
1299 | { | |
ff7c6d11 XL |
1300 | struct TupleInPlaceVisitor<'a, $($name: 'a,)+>(&'a mut ($($name,)+)); |
1301 | ||
1302 | impl<'a, 'de, $($name: Deserialize<'de>),+> Visitor<'de> for TupleInPlaceVisitor<'a, $($name,)+> { | |
1303 | type Value = (); | |
1304 | ||
1305 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1306 | formatter.write_str(concat!("a tuple of size ", $len)) | |
1307 | } | |
1308 | ||
1309 | #[inline] | |
1310 | #[allow(non_snake_case)] | |
8faf50e0 | 1311 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
ff7c6d11 XL |
1312 | where |
1313 | A: SeqAccess<'de>, | |
1314 | { | |
1315 | $( | |
1316 | if try!(seq.next_element_seed(InPlaceSeed(&mut (self.0).$n))).is_none() { | |
1317 | return Err(Error::invalid_length($n, &self)); | |
1318 | } | |
1319 | )+ | |
1320 | ||
1321 | Ok(()) | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | deserializer.deserialize_tuple($len, TupleInPlaceVisitor(place)) | |
041b39d2 XL |
1326 | } |
1327 | } | |
1328 | )+ | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | tuple_impls! { | |
ff7c6d11 XL |
1333 | 1 => (0 T0) |
1334 | 2 => (0 T0 1 T1) | |
1335 | 3 => (0 T0 1 T1 2 T2) | |
1336 | 4 => (0 T0 1 T1 2 T2 3 T3) | |
1337 | 5 => (0 T0 1 T1 2 T2 3 T3 4 T4) | |
1338 | 6 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5) | |
1339 | 7 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6) | |
1340 | 8 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7) | |
1341 | 9 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8) | |
1342 | 10 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9) | |
1343 | 11 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10) | |
1344 | 12 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11) | |
1345 | 13 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12) | |
1346 | 14 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13) | |
1347 | 15 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14) | |
1348 | 16 => (0 T0 1 T1 2 T2 3 T3 4 T4 5 T5 6 T6 7 T7 8 T8 9 T9 10 T10 11 T11 12 T12 13 T13 14 T14 15 T15) | |
041b39d2 XL |
1349 | } |
1350 | ||
1351 | //////////////////////////////////////////////////////////////////////////////// | |
1352 | ||
1353 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1354 | macro_rules! map_impl { | |
1355 | ( | |
1356 | $ty:ident < K $(: $kbound1:ident $(+ $kbound2:ident)*)*, V $(, $typaram:ident : $bound1:ident $(+ $bound2:ident)*)* >, | |
1357 | $access:ident, | |
041b39d2 XL |
1358 | $with_capacity:expr |
1359 | ) => { | |
1360 | impl<'de, K, V $(, $typaram)*> Deserialize<'de> for $ty<K, V $(, $typaram)*> | |
1361 | where | |
1362 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1363 | V: Deserialize<'de>, | |
1364 | $($typaram: $bound1 $(+ $bound2)*),* | |
1365 | { | |
1366 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1367 | where | |
1368 | D: Deserializer<'de>, | |
1369 | { | |
1370 | struct MapVisitor<K, V $(, $typaram)*> { | |
1371 | marker: PhantomData<$ty<K, V $(, $typaram)*>>, | |
1372 | } | |
1373 | ||
1374 | impl<'de, K, V $(, $typaram)*> Visitor<'de> for MapVisitor<K, V $(, $typaram)*> | |
1375 | where | |
1376 | K: Deserialize<'de> $(+ $kbound1 $(+ $kbound2)*)*, | |
1377 | V: Deserialize<'de>, | |
1378 | $($typaram: $bound1 $(+ $bound2)*),* | |
1379 | { | |
1380 | type Value = $ty<K, V $(, $typaram)*>; | |
1381 | ||
1382 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1383 | formatter.write_str("a map") | |
1384 | } | |
1385 | ||
1386 | #[inline] | |
1387 | fn visit_map<A>(self, mut $access: A) -> Result<Self::Value, A::Error> | |
1388 | where | |
1389 | A: MapAccess<'de>, | |
1390 | { | |
1391 | let mut values = $with_capacity; | |
1392 | ||
1393 | while let Some((key, value)) = try!($access.next_entry()) { | |
1394 | values.insert(key, value); | |
1395 | } | |
1396 | ||
1397 | Ok(values) | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | let visitor = MapVisitor { marker: PhantomData }; | |
1402 | deserializer.deserialize_map(visitor) | |
1403 | } | |
1404 | } | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1409 | map_impl!( | |
1410 | BTreeMap<K: Ord, V>, | |
1411 | map, | |
041b39d2 XL |
1412 | BTreeMap::new()); |
1413 | ||
1414 | #[cfg(feature = "std")] | |
1415 | map_impl!( | |
1416 | HashMap<K: Eq + Hash, V, S: BuildHasher + Default>, | |
1417 | map, | |
041b39d2 XL |
1418 | HashMap::with_capacity_and_hasher(size_hint::cautious(map.size_hint()), S::default())); |
1419 | ||
1420 | //////////////////////////////////////////////////////////////////////////////// | |
1421 | ||
1422 | #[cfg(feature = "std")] | |
abe05a73 | 1423 | macro_rules! parse_ip_impl { |
8faf50e0 | 1424 | ($expecting:tt $ty:ty; $size:tt) => { |
041b39d2 XL |
1425 | impl<'de> Deserialize<'de> for $ty { |
1426 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1427 | where | |
1428 | D: Deserializer<'de>, | |
1429 | { | |
abe05a73 | 1430 | if deserializer.is_human_readable() { |
5869c6ff | 1431 | deserializer.deserialize_str(FromStrVisitor::new($expecting)) |
abe05a73 XL |
1432 | } else { |
1433 | <[u8; $size]>::deserialize(deserializer).map(<$ty>::from) | |
1434 | } | |
1435 | } | |
1436 | } | |
83c7162d | 1437 | }; |
abe05a73 XL |
1438 | } |
1439 | ||
1440 | #[cfg(feature = "std")] | |
1441 | macro_rules! variant_identifier { | |
1442 | ( | |
1443 | $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1444 | $expecting_message: expr, | |
1445 | $variants_name: ident | |
1446 | ) => { | |
1447 | enum $name_kind { | |
1448 | $( $variant ),* | |
1449 | } | |
1450 | ||
1451 | static $variants_name: &'static [&'static str] = &[ $( stringify!($variant) ),*]; | |
1452 | ||
1453 | impl<'de> Deserialize<'de> for $name_kind { | |
1454 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1455 | where | |
1456 | D: Deserializer<'de>, | |
1457 | { | |
1458 | struct KindVisitor; | |
1459 | ||
1460 | impl<'de> Visitor<'de> for KindVisitor { | |
1461 | type Value = $name_kind; | |
1462 | ||
1463 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1464 | formatter.write_str($expecting_message) | |
1465 | } | |
1466 | ||
1b1a35ee | 1467 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
abe05a73 XL |
1468 | where |
1469 | E: Error, | |
1470 | { | |
1471 | match value { | |
1472 | $( | |
1473 | $index => Ok($name_kind :: $variant), | |
1474 | )* | |
1b1a35ee | 1475 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self),), |
abe05a73 XL |
1476 | } |
1477 | } | |
1478 | ||
1479 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
1480 | where | |
1481 | E: Error, | |
1482 | { | |
1483 | match value { | |
1484 | $( | |
1485 | stringify!($variant) => Ok($name_kind :: $variant), | |
1486 | )* | |
1487 | _ => Err(Error::unknown_variant(value, $variants_name)), | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> | |
1492 | where | |
1493 | E: Error, | |
1494 | { | |
1495 | match value { | |
1496 | $( | |
1497 | $bytes => Ok($name_kind :: $variant), | |
1498 | )* | |
1499 | _ => { | |
1500 | match str::from_utf8(value) { | |
1501 | Ok(value) => Err(Error::unknown_variant(value, $variants_name)), | |
1502 | Err(_) => Err(Error::invalid_value(Unexpected::Bytes(value), &self)), | |
1503 | } | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | deserializer.deserialize_identifier(KindVisitor) | |
1510 | } | |
1511 | } | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | #[cfg(feature = "std")] | |
1516 | macro_rules! deserialize_enum { | |
1517 | ( | |
1518 | $name: ident $name_kind: ident ( $($variant: ident; $bytes: expr; $index: expr),* ) | |
1519 | $expecting_message: expr, | |
1520 | $deserializer: expr | |
1521 | ) => { | |
1522 | variant_identifier!{ | |
1523 | $name_kind ( $($variant; $bytes; $index),* ) | |
1524 | $expecting_message, | |
1525 | VARIANTS | |
1526 | } | |
1527 | ||
1528 | struct EnumVisitor; | |
1529 | impl<'de> Visitor<'de> for EnumVisitor { | |
1530 | type Value = $name; | |
1531 | ||
1532 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1533 | formatter.write_str(concat!("a ", stringify!($name))) | |
1534 | } | |
1535 | ||
1536 | ||
1537 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> | |
1538 | where | |
1539 | A: EnumAccess<'de>, | |
1540 | { | |
1541 | match try!(data.variant()) { | |
1542 | $( | |
1543 | ($name_kind :: $variant, v) => v.newtype_variant().map($name :: $variant), | |
1544 | )* | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | $deserializer.deserialize_enum(stringify!($name), VARIANTS, EnumVisitor) | |
1549 | } | |
1550 | } | |
1551 | ||
1552 | #[cfg(feature = "std")] | |
1553 | impl<'de> Deserialize<'de> for net::IpAddr { | |
1554 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1555 | where | |
1556 | D: Deserializer<'de>, | |
1557 | { | |
1558 | if deserializer.is_human_readable() { | |
5869c6ff | 1559 | deserializer.deserialize_str(FromStrVisitor::new("IP address")) |
abe05a73 XL |
1560 | } else { |
1561 | use lib::net::IpAddr; | |
0731742a | 1562 | deserialize_enum! { |
abe05a73 XL |
1563 | IpAddr IpAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) |
1564 | "`V4` or `V6`", | |
1565 | deserializer | |
041b39d2 XL |
1566 | } |
1567 | } | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | #[cfg(feature = "std")] | |
8faf50e0 | 1572 | parse_ip_impl!("IPv4 address" net::Ipv4Addr; 4); |
041b39d2 XL |
1573 | |
1574 | #[cfg(feature = "std")] | |
8faf50e0 | 1575 | parse_ip_impl!("IPv6 address" net::Ipv6Addr; 16); |
041b39d2 XL |
1576 | |
1577 | #[cfg(feature = "std")] | |
abe05a73 | 1578 | macro_rules! parse_socket_impl { |
8faf50e0 | 1579 | ($expecting:tt $ty:ty, $new:expr) => { |
abe05a73 XL |
1580 | impl<'de> Deserialize<'de> for $ty { |
1581 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1582 | where | |
1583 | D: Deserializer<'de>, | |
1584 | { | |
1585 | if deserializer.is_human_readable() { | |
5869c6ff | 1586 | deserializer.deserialize_str(FromStrVisitor::new($expecting)) |
abe05a73 XL |
1587 | } else { |
1588 | <(_, u16)>::deserialize(deserializer).map(|(ip, port)| $new(ip, port)) | |
1589 | } | |
1590 | } | |
1591 | } | |
83c7162d | 1592 | }; |
abe05a73 | 1593 | } |
041b39d2 XL |
1594 | |
1595 | #[cfg(feature = "std")] | |
abe05a73 XL |
1596 | impl<'de> Deserialize<'de> for net::SocketAddr { |
1597 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1598 | where | |
1599 | D: Deserializer<'de>, | |
1600 | { | |
1601 | if deserializer.is_human_readable() { | |
5869c6ff | 1602 | deserializer.deserialize_str(FromStrVisitor::new("socket address")) |
abe05a73 XL |
1603 | } else { |
1604 | use lib::net::SocketAddr; | |
0731742a | 1605 | deserialize_enum! { |
abe05a73 XL |
1606 | SocketAddr SocketAddrKind (V4; b"V4"; 0, V6; b"V6"; 1) |
1607 | "`V4` or `V6`", | |
1608 | deserializer | |
1609 | } | |
1610 | } | |
1611 | } | |
1612 | } | |
041b39d2 XL |
1613 | |
1614 | #[cfg(feature = "std")] | |
8faf50e0 | 1615 | parse_socket_impl!("IPv4 socket address" net::SocketAddrV4, net::SocketAddrV4::new); |
041b39d2 XL |
1616 | |
1617 | #[cfg(feature = "std")] | |
8faf50e0 | 1618 | parse_socket_impl!("IPv6 socket address" net::SocketAddrV6, |ip, port| net::SocketAddrV6::new( |
83c7162d | 1619 | ip, port, 0, 0 |
ff7c6d11 | 1620 | )); |
041b39d2 XL |
1621 | |
1622 | //////////////////////////////////////////////////////////////////////////////// | |
1623 | ||
1624 | #[cfg(feature = "std")] | |
1625 | struct PathVisitor; | |
1626 | ||
1627 | #[cfg(feature = "std")] | |
1628 | impl<'a> Visitor<'a> for PathVisitor { | |
1629 | type Value = &'a Path; | |
1630 | ||
1631 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1632 | formatter.write_str("a borrowed path") | |
1633 | } | |
1634 | ||
1635 | fn visit_borrowed_str<E>(self, v: &'a str) -> Result<Self::Value, E> | |
1636 | where | |
1637 | E: Error, | |
1638 | { | |
1639 | Ok(v.as_ref()) | |
1640 | } | |
1641 | ||
1642 | fn visit_borrowed_bytes<E>(self, v: &'a [u8]) -> Result<Self::Value, E> | |
1643 | where | |
1644 | E: Error, | |
1645 | { | |
1646 | str::from_utf8(v) | |
1647 | .map(AsRef::as_ref) | |
1648 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | #[cfg(feature = "std")] | |
1653 | impl<'de: 'a, 'a> Deserialize<'de> for &'a Path { | |
1654 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1655 | where | |
1656 | D: Deserializer<'de>, | |
1657 | { | |
1658 | deserializer.deserialize_str(PathVisitor) | |
1659 | } | |
1660 | } | |
1661 | ||
1662 | #[cfg(feature = "std")] | |
1663 | struct PathBufVisitor; | |
1664 | ||
1665 | #[cfg(feature = "std")] | |
1666 | impl<'de> Visitor<'de> for PathBufVisitor { | |
1667 | type Value = PathBuf; | |
1668 | ||
1669 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1670 | formatter.write_str("path string") | |
1671 | } | |
1672 | ||
8faf50e0 | 1673 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> |
041b39d2 XL |
1674 | where |
1675 | E: Error, | |
1676 | { | |
1677 | Ok(From::from(v)) | |
1678 | } | |
1679 | ||
8faf50e0 | 1680 | fn visit_string<E>(self, v: String) -> Result<Self::Value, E> |
041b39d2 XL |
1681 | where |
1682 | E: Error, | |
1683 | { | |
1684 | Ok(From::from(v)) | |
1685 | } | |
f035d41b XL |
1686 | |
1687 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> | |
1688 | where | |
1689 | E: Error, | |
1690 | { | |
1691 | str::from_utf8(v) | |
1692 | .map(From::from) | |
1693 | .map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) | |
1694 | } | |
1695 | ||
1696 | fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E> | |
1697 | where | |
1698 | E: Error, | |
1699 | { | |
1700 | String::from_utf8(v) | |
1701 | .map(From::from) | |
1702 | .map_err(|e| Error::invalid_value(Unexpected::Bytes(&e.into_bytes()), &self)) | |
1703 | } | |
041b39d2 XL |
1704 | } |
1705 | ||
1706 | #[cfg(feature = "std")] | |
1707 | impl<'de> Deserialize<'de> for PathBuf { | |
8faf50e0 | 1708 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1709 | where |
1710 | D: Deserializer<'de>, | |
1711 | { | |
1712 | deserializer.deserialize_string(PathBufVisitor) | |
1713 | } | |
1714 | } | |
1715 | ||
5099ac24 | 1716 | #[cfg(all(feature = "std", not(no_de_boxed_path)))] |
f035d41b XL |
1717 | forwarded_impl!((), Box<Path>, PathBuf::into_boxed_path); |
1718 | ||
041b39d2 XL |
1719 | //////////////////////////////////////////////////////////////////////////////// |
1720 | ||
1721 | // If this were outside of the serde crate, it would just use: | |
1722 | // | |
1723 | // #[derive(Deserialize)] | |
1724 | // #[serde(variant_identifier)] | |
1725 | #[cfg(all(feature = "std", any(unix, windows)))] | |
0731742a | 1726 | variant_identifier! { |
abe05a73 XL |
1727 | OsStringKind (Unix; b"Unix"; 0, Windows; b"Windows"; 1) |
1728 | "`Unix` or `Windows`", | |
1729 | OSSTR_VARIANTS | |
041b39d2 XL |
1730 | } |
1731 | ||
1732 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1733 | struct OsStringVisitor; | |
1734 | ||
1735 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1736 | impl<'de> Visitor<'de> for OsStringVisitor { | |
1737 | type Value = OsString; | |
1738 | ||
1739 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1740 | formatter.write_str("os string") | |
1741 | } | |
1742 | ||
1743 | #[cfg(unix)] | |
8faf50e0 | 1744 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1745 | where |
1746 | A: EnumAccess<'de>, | |
1747 | { | |
1748 | use std::os::unix::ffi::OsStringExt; | |
1749 | ||
1750 | match try!(data.variant()) { | |
1751 | (OsStringKind::Unix, v) => v.newtype_variant().map(OsString::from_vec), | |
ff7c6d11 XL |
1752 | (OsStringKind::Windows, _) => Err(Error::custom( |
1753 | "cannot deserialize Windows OS string on Unix", | |
1754 | )), | |
041b39d2 XL |
1755 | } |
1756 | } | |
1757 | ||
1758 | #[cfg(windows)] | |
8faf50e0 | 1759 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
1760 | where |
1761 | A: EnumAccess<'de>, | |
1762 | { | |
1763 | use std::os::windows::ffi::OsStringExt; | |
1764 | ||
1765 | match try!(data.variant()) { | |
8faf50e0 XL |
1766 | (OsStringKind::Windows, v) => v |
1767 | .newtype_variant::<Vec<u16>>() | |
ff7c6d11 XL |
1768 | .map(|vec| OsString::from_wide(&vec)), |
1769 | (OsStringKind::Unix, _) => Err(Error::custom( | |
1770 | "cannot deserialize Unix OS string on Windows", | |
1771 | )), | |
041b39d2 XL |
1772 | } |
1773 | } | |
1774 | } | |
1775 | ||
1776 | #[cfg(all(feature = "std", any(unix, windows)))] | |
1777 | impl<'de> Deserialize<'de> for OsString { | |
8faf50e0 | 1778 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1779 | where |
1780 | D: Deserializer<'de>, | |
1781 | { | |
1782 | deserializer.deserialize_enum("OsString", OSSTR_VARIANTS, OsStringVisitor) | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | //////////////////////////////////////////////////////////////////////////////// | |
1787 | ||
1788 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1789 | forwarded_impl!((T), Box<T>, Box::new); |
041b39d2 XL |
1790 | |
1791 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1792 | forwarded_impl!((T), Box<[T]>, Vec::into_boxed_slice); |
041b39d2 XL |
1793 | |
1794 | #[cfg(any(feature = "std", feature = "alloc"))] | |
3b2f2976 | 1795 | forwarded_impl!((), Box<str>, String::into_boxed_str); |
041b39d2 | 1796 | |
5099ac24 | 1797 | #[cfg(all(no_de_rc_dst, feature = "rc", any(feature = "std", feature = "alloc")))] |
83c7162d XL |
1798 | forwarded_impl! { |
1799 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1800 | /// | |
1801 | /// Deserializing a data structure containing `Arc` will not attempt to | |
1802 | /// deduplicate `Arc` references to the same data. Every deserialized `Arc` | |
1803 | /// will end up with a strong count of 1. | |
1804 | /// | |
1805 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1806 | (T), Arc<T>, Arc::new | |
1807 | } | |
041b39d2 | 1808 | |
5099ac24 | 1809 | #[cfg(all(no_de_rc_dst, feature = "rc", any(feature = "std", feature = "alloc")))] |
83c7162d XL |
1810 | forwarded_impl! { |
1811 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1812 | /// | |
1813 | /// Deserializing a data structure containing `Rc` will not attempt to | |
1814 | /// deduplicate `Rc` references to the same data. Every deserialized `Rc` | |
1815 | /// will end up with a strong count of 1. | |
1816 | /// | |
1817 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1818 | (T), Rc<T>, Rc::new | |
1819 | } | |
041b39d2 XL |
1820 | |
1821 | #[cfg(any(feature = "std", feature = "alloc"))] | |
1822 | impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T> | |
1823 | where | |
1824 | T: ToOwned, | |
1825 | T::Owned: Deserialize<'de>, | |
1826 | { | |
1827 | #[inline] | |
8faf50e0 | 1828 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1829 | where |
1830 | D: Deserializer<'de>, | |
1831 | { | |
1832 | T::Owned::deserialize(deserializer).map(Cow::Owned) | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | //////////////////////////////////////////////////////////////////////////////// | |
ea8adc8c | 1837 | |
8faf50e0 XL |
1838 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting |
1839 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. | |
1840 | /// | |
1841 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1842 | #[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))] | |
1843 | impl<'de, T: ?Sized> Deserialize<'de> for RcWeak<T> | |
1844 | where | |
1845 | T: Deserialize<'de>, | |
1846 | { | |
1847 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1848 | where | |
1849 | D: Deserializer<'de>, | |
1850 | { | |
1851 | try!(Option::<T>::deserialize(deserializer)); | |
1852 | Ok(RcWeak::new()) | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | /// This impl requires the [`"rc"`] Cargo feature of Serde. The resulting | |
1857 | /// `Weak<T>` has a reference count of 0 and cannot be upgraded. | |
1858 | /// | |
1859 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1860 | #[cfg(all(feature = "rc", any(feature = "std", feature = "alloc")))] | |
1861 | impl<'de, T: ?Sized> Deserialize<'de> for ArcWeak<T> | |
1862 | where | |
1863 | T: Deserialize<'de>, | |
1864 | { | |
1865 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1866 | where | |
1867 | D: Deserializer<'de>, | |
1868 | { | |
1869 | try!(Option::<T>::deserialize(deserializer)); | |
1870 | Ok(ArcWeak::new()) | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | //////////////////////////////////////////////////////////////////////////////// | |
1875 | ||
5099ac24 FG |
1876 | #[cfg(all( |
1877 | not(no_de_rc_dst), | |
1878 | feature = "rc", | |
1879 | any(feature = "std", feature = "alloc") | |
1880 | ))] | |
ea8adc8c | 1881 | macro_rules! box_forwarded_impl { |
83c7162d XL |
1882 | ( |
1883 | $(#[doc = $doc:tt])* | |
1884 | $t:ident | |
1885 | ) => { | |
1886 | $(#[doc = $doc])* | |
ea8adc8c XL |
1887 | impl<'de, T: ?Sized> Deserialize<'de> for $t<T> |
1888 | where | |
1889 | Box<T>: Deserialize<'de>, | |
1890 | { | |
1891 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1892 | where | |
1893 | D: Deserializer<'de>, | |
1894 | { | |
1895 | Box::deserialize(deserializer).map(Into::into) | |
1896 | } | |
1897 | } | |
83c7162d | 1898 | }; |
ea8adc8c XL |
1899 | } |
1900 | ||
5099ac24 FG |
1901 | #[cfg(all( |
1902 | not(no_de_rc_dst), | |
1903 | feature = "rc", | |
1904 | any(feature = "std", feature = "alloc") | |
1905 | ))] | |
83c7162d XL |
1906 | box_forwarded_impl! { |
1907 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1908 | /// | |
1909 | /// Deserializing a data structure containing `Rc` will not attempt to | |
1910 | /// deduplicate `Rc` references to the same data. Every deserialized `Rc` | |
1911 | /// will end up with a strong count of 1. | |
1912 | /// | |
1913 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1914 | Rc | |
1915 | } | |
ea8adc8c | 1916 | |
5099ac24 FG |
1917 | #[cfg(all( |
1918 | not(no_de_rc_dst), | |
1919 | feature = "rc", | |
1920 | any(feature = "std", feature = "alloc") | |
1921 | ))] | |
83c7162d XL |
1922 | box_forwarded_impl! { |
1923 | /// This impl requires the [`"rc"`] Cargo feature of Serde. | |
1924 | /// | |
1925 | /// Deserializing a data structure containing `Arc` will not attempt to | |
1926 | /// deduplicate `Arc` references to the same data. Every deserialized `Arc` | |
1927 | /// will end up with a strong count of 1. | |
1928 | /// | |
1929 | /// [`"rc"`]: https://serde.rs/feature-flags.html#-features-rc | |
1930 | Arc | |
1931 | } | |
ea8adc8c XL |
1932 | |
1933 | //////////////////////////////////////////////////////////////////////////////// | |
041b39d2 XL |
1934 | |
1935 | impl<'de, T> Deserialize<'de> for Cell<T> | |
1936 | where | |
1937 | T: Deserialize<'de> + Copy, | |
1938 | { | |
8faf50e0 | 1939 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1940 | where |
1941 | D: Deserializer<'de>, | |
1942 | { | |
1943 | T::deserialize(deserializer).map(Cell::new) | |
1944 | } | |
1945 | } | |
1946 | ||
3b2f2976 | 1947 | forwarded_impl!((T), RefCell<T>, RefCell::new); |
041b39d2 XL |
1948 | |
1949 | #[cfg(feature = "std")] | |
3b2f2976 | 1950 | forwarded_impl!((T), Mutex<T>, Mutex::new); |
041b39d2 XL |
1951 | |
1952 | #[cfg(feature = "std")] | |
3b2f2976 | 1953 | forwarded_impl!((T), RwLock<T>, RwLock::new); |
041b39d2 XL |
1954 | |
1955 | //////////////////////////////////////////////////////////////////////////////// | |
1956 | ||
1957 | // This is a cleaned-up version of the impl generated by: | |
1958 | // | |
1959 | // #[derive(Deserialize)] | |
1960 | // #[serde(deny_unknown_fields)] | |
1961 | // struct Duration { | |
1962 | // secs: u64, | |
1963 | // nanos: u32, | |
1964 | // } | |
5099ac24 | 1965 | #[cfg(any(feature = "std", not(no_core_duration)))] |
041b39d2 XL |
1966 | impl<'de> Deserialize<'de> for Duration { |
1967 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
1968 | where | |
1969 | D: Deserializer<'de>, | |
1970 | { | |
1971 | // If this were outside of the serde crate, it would just use: | |
1972 | // | |
1973 | // #[derive(Deserialize)] | |
1974 | // #[serde(field_identifier, rename_all = "lowercase")] | |
1975 | enum Field { | |
1976 | Secs, | |
1977 | Nanos, | |
fc512014 | 1978 | } |
041b39d2 XL |
1979 | |
1980 | impl<'de> Deserialize<'de> for Field { | |
8faf50e0 | 1981 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
1982 | where |
1983 | D: Deserializer<'de>, | |
1984 | { | |
1985 | struct FieldVisitor; | |
1986 | ||
1987 | impl<'de> Visitor<'de> for FieldVisitor { | |
1988 | type Value = Field; | |
1989 | ||
1990 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
1991 | formatter.write_str("`secs` or `nanos`") | |
1992 | } | |
1993 | ||
8faf50e0 | 1994 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
1995 | where |
1996 | E: Error, | |
1997 | { | |
1998 | match value { | |
1999 | "secs" => Ok(Field::Secs), | |
2000 | "nanos" => Ok(Field::Nanos), | |
2001 | _ => Err(Error::unknown_field(value, FIELDS)), | |
2002 | } | |
2003 | } | |
2004 | ||
8faf50e0 | 2005 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
2006 | where |
2007 | E: Error, | |
2008 | { | |
2009 | match value { | |
2010 | b"secs" => Ok(Field::Secs), | |
2011 | b"nanos" => Ok(Field::Nanos), | |
2012 | _ => { | |
5869c6ff | 2013 | let value = ::__private::from_utf8_lossy(value); |
064997fb | 2014 | Err(Error::unknown_field(&*value, FIELDS)) |
041b39d2 XL |
2015 | } |
2016 | } | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | deserializer.deserialize_identifier(FieldVisitor) | |
2021 | } | |
2022 | } | |
2023 | ||
5869c6ff XL |
2024 | fn check_overflow<E>(secs: u64, nanos: u32) -> Result<(), E> |
2025 | where | |
2026 | E: Error, | |
2027 | { | |
2028 | static NANOS_PER_SEC: u32 = 1_000_000_000; | |
2029 | match secs.checked_add((nanos / NANOS_PER_SEC) as u64) { | |
2030 | Some(_) => Ok(()), | |
2031 | None => Err(E::custom("overflow deserializing Duration")), | |
2032 | } | |
2033 | } | |
2034 | ||
041b39d2 XL |
2035 | struct DurationVisitor; |
2036 | ||
2037 | impl<'de> Visitor<'de> for DurationVisitor { | |
2038 | type Value = Duration; | |
2039 | ||
2040 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2041 | formatter.write_str("struct Duration") | |
2042 | } | |
2043 | ||
8faf50e0 | 2044 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2045 | where |
2046 | A: SeqAccess<'de>, | |
2047 | { | |
2048 | let secs: u64 = match try!(seq.next_element()) { | |
2049 | Some(value) => value, | |
2050 | None => { | |
2051 | return Err(Error::invalid_length(0, &self)); | |
2052 | } | |
2053 | }; | |
2054 | let nanos: u32 = match try!(seq.next_element()) { | |
2055 | Some(value) => value, | |
2056 | None => { | |
2057 | return Err(Error::invalid_length(1, &self)); | |
2058 | } | |
2059 | }; | |
5869c6ff | 2060 | try!(check_overflow(secs, nanos)); |
041b39d2 XL |
2061 | Ok(Duration::new(secs, nanos)) |
2062 | } | |
2063 | ||
8faf50e0 | 2064 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2065 | where |
2066 | A: MapAccess<'de>, | |
2067 | { | |
2068 | let mut secs: Option<u64> = None; | |
2069 | let mut nanos: Option<u32> = None; | |
2070 | while let Some(key) = try!(map.next_key()) { | |
2071 | match key { | |
2072 | Field::Secs => { | |
2073 | if secs.is_some() { | |
2074 | return Err(<A::Error as Error>::duplicate_field("secs")); | |
2075 | } | |
2076 | secs = Some(try!(map.next_value())); | |
2077 | } | |
2078 | Field::Nanos => { | |
2079 | if nanos.is_some() { | |
2080 | return Err(<A::Error as Error>::duplicate_field("nanos")); | |
2081 | } | |
2082 | nanos = Some(try!(map.next_value())); | |
2083 | } | |
2084 | } | |
2085 | } | |
2086 | let secs = match secs { | |
2087 | Some(secs) => secs, | |
2088 | None => return Err(<A::Error as Error>::missing_field("secs")), | |
2089 | }; | |
2090 | let nanos = match nanos { | |
2091 | Some(nanos) => nanos, | |
2092 | None => return Err(<A::Error as Error>::missing_field("nanos")), | |
2093 | }; | |
5869c6ff | 2094 | try!(check_overflow(secs, nanos)); |
041b39d2 XL |
2095 | Ok(Duration::new(secs, nanos)) |
2096 | } | |
2097 | } | |
2098 | ||
2099 | const FIELDS: &'static [&'static str] = &["secs", "nanos"]; | |
2100 | deserializer.deserialize_struct("Duration", FIELDS, DurationVisitor) | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | //////////////////////////////////////////////////////////////////////////////// | |
2105 | ||
2106 | #[cfg(feature = "std")] | |
2107 | impl<'de> Deserialize<'de> for SystemTime { | |
2108 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2109 | where | |
2110 | D: Deserializer<'de>, | |
2111 | { | |
2112 | // Reuse duration | |
2113 | enum Field { | |
2114 | Secs, | |
2115 | Nanos, | |
fc512014 | 2116 | } |
041b39d2 XL |
2117 | |
2118 | impl<'de> Deserialize<'de> for Field { | |
8faf50e0 | 2119 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
2120 | where |
2121 | D: Deserializer<'de>, | |
2122 | { | |
2123 | struct FieldVisitor; | |
2124 | ||
2125 | impl<'de> Visitor<'de> for FieldVisitor { | |
2126 | type Value = Field; | |
2127 | ||
2128 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2129 | formatter.write_str("`secs_since_epoch` or `nanos_since_epoch`") | |
2130 | } | |
2131 | ||
8faf50e0 | 2132 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
2133 | where |
2134 | E: Error, | |
2135 | { | |
2136 | match value { | |
2137 | "secs_since_epoch" => Ok(Field::Secs), | |
2138 | "nanos_since_epoch" => Ok(Field::Nanos), | |
2139 | _ => Err(Error::unknown_field(value, FIELDS)), | |
2140 | } | |
2141 | } | |
2142 | ||
8faf50e0 | 2143 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
2144 | where |
2145 | E: Error, | |
2146 | { | |
2147 | match value { | |
2148 | b"secs_since_epoch" => Ok(Field::Secs), | |
2149 | b"nanos_since_epoch" => Ok(Field::Nanos), | |
2150 | _ => { | |
2151 | let value = String::from_utf8_lossy(value); | |
2152 | Err(Error::unknown_field(&value, FIELDS)) | |
2153 | } | |
2154 | } | |
2155 | } | |
2156 | } | |
2157 | ||
2158 | deserializer.deserialize_identifier(FieldVisitor) | |
2159 | } | |
2160 | } | |
2161 | ||
6a06907d XL |
2162 | fn check_overflow<E>(secs: u64, nanos: u32) -> Result<(), E> |
2163 | where | |
2164 | E: Error, | |
2165 | { | |
2166 | static NANOS_PER_SEC: u32 = 1_000_000_000; | |
2167 | match secs.checked_add((nanos / NANOS_PER_SEC) as u64) { | |
2168 | Some(_) => Ok(()), | |
2169 | None => Err(E::custom("overflow deserializing SystemTime epoch offset")), | |
2170 | } | |
2171 | } | |
2172 | ||
041b39d2 XL |
2173 | struct DurationVisitor; |
2174 | ||
2175 | impl<'de> Visitor<'de> for DurationVisitor { | |
2176 | type Value = Duration; | |
2177 | ||
2178 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2179 | formatter.write_str("struct SystemTime") | |
2180 | } | |
2181 | ||
8faf50e0 | 2182 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2183 | where |
2184 | A: SeqAccess<'de>, | |
2185 | { | |
2186 | let secs: u64 = match try!(seq.next_element()) { | |
2187 | Some(value) => value, | |
2188 | None => { | |
2189 | return Err(Error::invalid_length(0, &self)); | |
2190 | } | |
2191 | }; | |
2192 | let nanos: u32 = match try!(seq.next_element()) { | |
2193 | Some(value) => value, | |
2194 | None => { | |
2195 | return Err(Error::invalid_length(1, &self)); | |
2196 | } | |
2197 | }; | |
6a06907d | 2198 | try!(check_overflow(secs, nanos)); |
041b39d2 XL |
2199 | Ok(Duration::new(secs, nanos)) |
2200 | } | |
2201 | ||
8faf50e0 | 2202 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2203 | where |
2204 | A: MapAccess<'de>, | |
2205 | { | |
2206 | let mut secs: Option<u64> = None; | |
2207 | let mut nanos: Option<u32> = None; | |
2208 | while let Some(key) = try!(map.next_key()) { | |
2209 | match key { | |
2210 | Field::Secs => { | |
2211 | if secs.is_some() { | |
ff7c6d11 XL |
2212 | return Err(<A::Error as Error>::duplicate_field( |
2213 | "secs_since_epoch", | |
2214 | )); | |
041b39d2 XL |
2215 | } |
2216 | secs = Some(try!(map.next_value())); | |
2217 | } | |
2218 | Field::Nanos => { | |
2219 | if nanos.is_some() { | |
ff7c6d11 XL |
2220 | return Err(<A::Error as Error>::duplicate_field( |
2221 | "nanos_since_epoch", | |
2222 | )); | |
041b39d2 XL |
2223 | } |
2224 | nanos = Some(try!(map.next_value())); | |
2225 | } | |
2226 | } | |
2227 | } | |
2228 | let secs = match secs { | |
2229 | Some(secs) => secs, | |
2230 | None => return Err(<A::Error as Error>::missing_field("secs_since_epoch")), | |
2231 | }; | |
2232 | let nanos = match nanos { | |
2233 | Some(nanos) => nanos, | |
2234 | None => return Err(<A::Error as Error>::missing_field("nanos_since_epoch")), | |
2235 | }; | |
6a06907d | 2236 | try!(check_overflow(secs, nanos)); |
041b39d2 XL |
2237 | Ok(Duration::new(secs, nanos)) |
2238 | } | |
2239 | } | |
2240 | ||
2241 | const FIELDS: &'static [&'static str] = &["secs_since_epoch", "nanos_since_epoch"]; | |
2242 | let duration = try!(deserializer.deserialize_struct("SystemTime", FIELDS, DurationVisitor)); | |
5099ac24 | 2243 | #[cfg(not(no_systemtime_checked_add))] |
6a06907d XL |
2244 | let ret = UNIX_EPOCH |
2245 | .checked_add(duration) | |
2246 | .ok_or_else(|| D::Error::custom("overflow deserializing SystemTime")); | |
5099ac24 | 2247 | #[cfg(no_systemtime_checked_add)] |
6a06907d XL |
2248 | let ret = Ok(UNIX_EPOCH + duration); |
2249 | ret | |
041b39d2 XL |
2250 | } |
2251 | } | |
2252 | ||
2253 | //////////////////////////////////////////////////////////////////////////////// | |
2254 | ||
2255 | // Similar to: | |
2256 | // | |
2257 | // #[derive(Deserialize)] | |
2258 | // #[serde(deny_unknown_fields)] | |
2259 | // struct Range { | |
2260 | // start: u64, | |
2261 | // end: u32, | |
2262 | // } | |
b7449926 | 2263 | impl<'de, Idx> Deserialize<'de> for Range<Idx> |
041b39d2 XL |
2264 | where |
2265 | Idx: Deserialize<'de>, | |
2266 | { | |
2267 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2268 | where | |
2269 | D: Deserializer<'de>, | |
2270 | { | |
b7449926 XL |
2271 | let (start, end) = deserializer.deserialize_struct( |
2272 | "Range", | |
2273 | range::FIELDS, | |
2274 | range::RangeVisitor { | |
2275 | expecting: "struct Range", | |
2276 | phantom: PhantomData, | |
2277 | }, | |
2278 | )?; | |
2279 | Ok(start..end) | |
2280 | } | |
2281 | } | |
041b39d2 | 2282 | |
5099ac24 | 2283 | #[cfg(not(no_range_inclusive))] |
b7449926 XL |
2284 | impl<'de, Idx> Deserialize<'de> for RangeInclusive<Idx> |
2285 | where | |
2286 | Idx: Deserialize<'de>, | |
2287 | { | |
2288 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2289 | where | |
2290 | D: Deserializer<'de>, | |
2291 | { | |
2292 | let (start, end) = deserializer.deserialize_struct( | |
2293 | "RangeInclusive", | |
2294 | range::FIELDS, | |
2295 | range::RangeVisitor { | |
2296 | expecting: "struct RangeInclusive", | |
2297 | phantom: PhantomData, | |
2298 | }, | |
2299 | )?; | |
2300 | Ok(RangeInclusive::new(start, end)) | |
2301 | } | |
2302 | } | |
041b39d2 | 2303 | |
b7449926 XL |
2304 | mod range { |
2305 | use lib::*; | |
041b39d2 | 2306 | |
b7449926 | 2307 | use de::{Deserialize, Deserializer, Error, MapAccess, SeqAccess, Visitor}; |
041b39d2 | 2308 | |
b7449926 XL |
2309 | pub const FIELDS: &'static [&'static str] = &["start", "end"]; |
2310 | ||
2311 | // If this were outside of the serde crate, it would just use: | |
2312 | // | |
2313 | // #[derive(Deserialize)] | |
2314 | // #[serde(field_identifier, rename_all = "lowercase")] | |
2315 | enum Field { | |
2316 | Start, | |
2317 | End, | |
2318 | } | |
2319 | ||
2320 | impl<'de> Deserialize<'de> for Field { | |
2321 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2322 | where | |
2323 | D: Deserializer<'de>, | |
2324 | { | |
2325 | struct FieldVisitor; | |
2326 | ||
2327 | impl<'de> Visitor<'de> for FieldVisitor { | |
2328 | type Value = Field; | |
2329 | ||
2330 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2331 | formatter.write_str("`start` or `end`") | |
2332 | } | |
2333 | ||
2334 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
2335 | where | |
2336 | E: Error, | |
2337 | { | |
2338 | match value { | |
2339 | "start" => Ok(Field::Start), | |
2340 | "end" => Ok(Field::End), | |
2341 | _ => Err(Error::unknown_field(value, FIELDS)), | |
041b39d2 | 2342 | } |
b7449926 | 2343 | } |
041b39d2 | 2344 | |
b7449926 XL |
2345 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
2346 | where | |
2347 | E: Error, | |
2348 | { | |
2349 | match value { | |
2350 | b"start" => Ok(Field::Start), | |
2351 | b"end" => Ok(Field::End), | |
2352 | _ => { | |
5869c6ff | 2353 | let value = ::__private::from_utf8_lossy(value); |
064997fb | 2354 | Err(Error::unknown_field(&*value, FIELDS)) |
041b39d2 XL |
2355 | } |
2356 | } | |
2357 | } | |
041b39d2 | 2358 | } |
b7449926 XL |
2359 | |
2360 | deserializer.deserialize_identifier(FieldVisitor) | |
041b39d2 | 2361 | } |
b7449926 | 2362 | } |
041b39d2 | 2363 | |
b7449926 XL |
2364 | pub struct RangeVisitor<Idx> { |
2365 | pub expecting: &'static str, | |
2366 | pub phantom: PhantomData<Idx>, | |
2367 | } | |
2368 | ||
2369 | impl<'de, Idx> Visitor<'de> for RangeVisitor<Idx> | |
2370 | where | |
2371 | Idx: Deserialize<'de>, | |
2372 | { | |
2373 | type Value = (Idx, Idx); | |
2374 | ||
2375 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2376 | formatter.write_str(self.expecting) | |
041b39d2 XL |
2377 | } |
2378 | ||
b7449926 | 2379 | fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> |
041b39d2 | 2380 | where |
b7449926 | 2381 | A: SeqAccess<'de>, |
041b39d2 | 2382 | { |
b7449926 XL |
2383 | let start: Idx = match try!(seq.next_element()) { |
2384 | Some(value) => value, | |
2385 | None => { | |
2386 | return Err(Error::invalid_length(0, &self)); | |
2387 | } | |
2388 | }; | |
2389 | let end: Idx = match try!(seq.next_element()) { | |
2390 | Some(value) => value, | |
2391 | None => { | |
2392 | return Err(Error::invalid_length(1, &self)); | |
2393 | } | |
2394 | }; | |
2395 | Ok((start, end)) | |
2396 | } | |
041b39d2 | 2397 | |
b7449926 XL |
2398 | fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> |
2399 | where | |
2400 | A: MapAccess<'de>, | |
2401 | { | |
2402 | let mut start: Option<Idx> = None; | |
2403 | let mut end: Option<Idx> = None; | |
2404 | while let Some(key) = try!(map.next_key()) { | |
2405 | match key { | |
2406 | Field::Start => { | |
2407 | if start.is_some() { | |
2408 | return Err(<A::Error as Error>::duplicate_field("start")); | |
041b39d2 | 2409 | } |
b7449926 XL |
2410 | start = Some(try!(map.next_value())); |
2411 | } | |
2412 | Field::End => { | |
2413 | if end.is_some() { | |
2414 | return Err(<A::Error as Error>::duplicate_field("end")); | |
041b39d2 | 2415 | } |
b7449926 | 2416 | end = Some(try!(map.next_value())); |
041b39d2 XL |
2417 | } |
2418 | } | |
041b39d2 | 2419 | } |
b7449926 XL |
2420 | let start = match start { |
2421 | Some(start) => start, | |
2422 | None => return Err(<A::Error as Error>::missing_field("start")), | |
2423 | }; | |
2424 | let end = match end { | |
2425 | Some(end) => end, | |
2426 | None => return Err(<A::Error as Error>::missing_field("end")), | |
2427 | }; | |
2428 | Ok((start, end)) | |
041b39d2 | 2429 | } |
041b39d2 XL |
2430 | } |
2431 | } | |
2432 | ||
2433 | //////////////////////////////////////////////////////////////////////////////// | |
2434 | ||
5099ac24 | 2435 | #[cfg(any(not(no_ops_bound), all(feature = "std", not(no_collections_bound))))] |
dc9dc135 XL |
2436 | impl<'de, T> Deserialize<'de> for Bound<T> |
2437 | where | |
2438 | T: Deserialize<'de>, | |
2439 | { | |
2440 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2441 | where | |
2442 | D: Deserializer<'de>, | |
2443 | { | |
2444 | enum Field { | |
2445 | Unbounded, | |
2446 | Included, | |
2447 | Excluded, | |
2448 | } | |
2449 | ||
2450 | impl<'de> Deserialize<'de> for Field { | |
2451 | #[inline] | |
2452 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2453 | where | |
2454 | D: Deserializer<'de>, | |
2455 | { | |
2456 | struct FieldVisitor; | |
2457 | ||
2458 | impl<'de> Visitor<'de> for FieldVisitor { | |
2459 | type Value = Field; | |
2460 | ||
2461 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2462 | formatter.write_str("`Unbounded`, `Included` or `Excluded`") | |
2463 | } | |
2464 | ||
1b1a35ee | 2465 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
dc9dc135 XL |
2466 | where |
2467 | E: Error, | |
2468 | { | |
2469 | match value { | |
2470 | 0 => Ok(Field::Unbounded), | |
2471 | 1 => Ok(Field::Included), | |
2472 | 2 => Ok(Field::Excluded), | |
fc512014 | 2473 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self)), |
dc9dc135 XL |
2474 | } |
2475 | } | |
2476 | ||
2477 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> | |
2478 | where | |
2479 | E: Error, | |
2480 | { | |
2481 | match value { | |
2482 | "Unbounded" => Ok(Field::Unbounded), | |
2483 | "Included" => Ok(Field::Included), | |
2484 | "Excluded" => Ok(Field::Excluded), | |
2485 | _ => Err(Error::unknown_variant(value, VARIANTS)), | |
2486 | } | |
2487 | } | |
2488 | ||
2489 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> | |
2490 | where | |
2491 | E: Error, | |
2492 | { | |
2493 | match value { | |
2494 | b"Unbounded" => Ok(Field::Unbounded), | |
2495 | b"Included" => Ok(Field::Included), | |
2496 | b"Excluded" => Ok(Field::Excluded), | |
2497 | _ => match str::from_utf8(value) { | |
2498 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), | |
2499 | Err(_) => { | |
2500 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) | |
2501 | } | |
2502 | }, | |
2503 | } | |
2504 | } | |
2505 | } | |
2506 | ||
2507 | deserializer.deserialize_identifier(FieldVisitor) | |
2508 | } | |
2509 | } | |
2510 | ||
2511 | struct BoundVisitor<T>(PhantomData<Bound<T>>); | |
2512 | ||
2513 | impl<'de, T> Visitor<'de> for BoundVisitor<T> | |
2514 | where | |
2515 | T: Deserialize<'de>, | |
2516 | { | |
2517 | type Value = Bound<T>; | |
2518 | ||
2519 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2520 | formatter.write_str("enum Bound") | |
2521 | } | |
2522 | ||
2523 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> | |
2524 | where | |
2525 | A: EnumAccess<'de>, | |
2526 | { | |
2527 | match try!(data.variant()) { | |
2528 | (Field::Unbounded, v) => v.unit_variant().map(|()| Bound::Unbounded), | |
2529 | (Field::Included, v) => v.newtype_variant().map(Bound::Included), | |
2530 | (Field::Excluded, v) => v.newtype_variant().map(Bound::Excluded), | |
2531 | } | |
2532 | } | |
2533 | } | |
2534 | ||
2535 | const VARIANTS: &'static [&'static str] = &["Unbounded", "Included", "Excluded"]; | |
2536 | ||
2537 | deserializer.deserialize_enum("Bound", VARIANTS, BoundVisitor(PhantomData)) | |
2538 | } | |
2539 | } | |
2540 | ||
2541 | //////////////////////////////////////////////////////////////////////////////// | |
2542 | ||
041b39d2 XL |
2543 | impl<'de, T, E> Deserialize<'de> for Result<T, E> |
2544 | where | |
2545 | T: Deserialize<'de>, | |
2546 | E: Deserialize<'de>, | |
2547 | { | |
8faf50e0 | 2548 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
2549 | where |
2550 | D: Deserializer<'de>, | |
2551 | { | |
2552 | // If this were outside of the serde crate, it would just use: | |
2553 | // | |
2554 | // #[derive(Deserialize)] | |
2555 | // #[serde(variant_identifier)] | |
2556 | enum Field { | |
2557 | Ok, | |
2558 | Err, | |
2559 | } | |
2560 | ||
2561 | impl<'de> Deserialize<'de> for Field { | |
2562 | #[inline] | |
8faf50e0 | 2563 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
041b39d2 XL |
2564 | where |
2565 | D: Deserializer<'de>, | |
2566 | { | |
2567 | struct FieldVisitor; | |
2568 | ||
2569 | impl<'de> Visitor<'de> for FieldVisitor { | |
2570 | type Value = Field; | |
2571 | ||
2572 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2573 | formatter.write_str("`Ok` or `Err`") | |
2574 | } | |
2575 | ||
1b1a35ee | 2576 | fn visit_u64<E>(self, value: u64) -> Result<Self::Value, E> |
041b39d2 XL |
2577 | where |
2578 | E: Error, | |
2579 | { | |
2580 | match value { | |
2581 | 0 => Ok(Field::Ok), | |
2582 | 1 => Ok(Field::Err), | |
fc512014 | 2583 | _ => Err(Error::invalid_value(Unexpected::Unsigned(value), &self)), |
041b39d2 XL |
2584 | } |
2585 | } | |
2586 | ||
8faf50e0 | 2587 | fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> |
041b39d2 XL |
2588 | where |
2589 | E: Error, | |
2590 | { | |
2591 | match value { | |
2592 | "Ok" => Ok(Field::Ok), | |
2593 | "Err" => Ok(Field::Err), | |
2594 | _ => Err(Error::unknown_variant(value, VARIANTS)), | |
2595 | } | |
2596 | } | |
2597 | ||
8faf50e0 | 2598 | fn visit_bytes<E>(self, value: &[u8]) -> Result<Self::Value, E> |
041b39d2 XL |
2599 | where |
2600 | E: Error, | |
2601 | { | |
2602 | match value { | |
2603 | b"Ok" => Ok(Field::Ok), | |
2604 | b"Err" => Ok(Field::Err), | |
ff7c6d11 XL |
2605 | _ => match str::from_utf8(value) { |
2606 | Ok(value) => Err(Error::unknown_variant(value, VARIANTS)), | |
2607 | Err(_) => { | |
2608 | Err(Error::invalid_value(Unexpected::Bytes(value), &self)) | |
041b39d2 | 2609 | } |
ff7c6d11 | 2610 | }, |
041b39d2 XL |
2611 | } |
2612 | } | |
2613 | } | |
2614 | ||
2615 | deserializer.deserialize_identifier(FieldVisitor) | |
2616 | } | |
2617 | } | |
2618 | ||
2619 | struct ResultVisitor<T, E>(PhantomData<Result<T, E>>); | |
2620 | ||
2621 | impl<'de, T, E> Visitor<'de> for ResultVisitor<T, E> | |
2622 | where | |
2623 | T: Deserialize<'de>, | |
2624 | E: Deserialize<'de>, | |
2625 | { | |
2626 | type Value = Result<T, E>; | |
2627 | ||
2628 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2629 | formatter.write_str("enum Result") | |
2630 | } | |
2631 | ||
8faf50e0 | 2632 | fn visit_enum<A>(self, data: A) -> Result<Self::Value, A::Error> |
041b39d2 XL |
2633 | where |
2634 | A: EnumAccess<'de>, | |
2635 | { | |
2636 | match try!(data.variant()) { | |
2637 | (Field::Ok, v) => v.newtype_variant().map(Ok), | |
2638 | (Field::Err, v) => v.newtype_variant().map(Err), | |
2639 | } | |
2640 | } | |
2641 | } | |
2642 | ||
2643 | const VARIANTS: &'static [&'static str] = &["Ok", "Err"]; | |
2644 | ||
2645 | deserializer.deserialize_enum("Result", VARIANTS, ResultVisitor(PhantomData)) | |
2646 | } | |
2647 | } | |
abe05a73 XL |
2648 | |
2649 | //////////////////////////////////////////////////////////////////////////////// | |
2650 | ||
abe05a73 XL |
2651 | impl<'de, T> Deserialize<'de> for Wrapping<T> |
2652 | where | |
ff7c6d11 | 2653 | T: Deserialize<'de>, |
abe05a73 | 2654 | { |
8faf50e0 | 2655 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
abe05a73 XL |
2656 | where |
2657 | D: Deserializer<'de>, | |
2658 | { | |
2659 | Deserialize::deserialize(deserializer).map(Wrapping) | |
2660 | } | |
2661 | } | |
e1599b0c | 2662 | |
5099ac24 | 2663 | #[cfg(all(feature = "std", not(no_std_atomic)))] |
e1599b0c XL |
2664 | macro_rules! atomic_impl { |
2665 | ($($ty:ident)*) => { | |
2666 | $( | |
2667 | impl<'de> Deserialize<'de> for $ty { | |
2668 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> | |
2669 | where | |
2670 | D: Deserializer<'de>, | |
2671 | { | |
2672 | Deserialize::deserialize(deserializer).map(Self::new) | |
2673 | } | |
2674 | } | |
2675 | )* | |
2676 | }; | |
2677 | } | |
2678 | ||
5099ac24 | 2679 | #[cfg(all(feature = "std", not(no_std_atomic)))] |
e1599b0c XL |
2680 | atomic_impl! { |
2681 | AtomicBool | |
2682 | AtomicI8 AtomicI16 AtomicI32 AtomicIsize | |
2683 | AtomicU8 AtomicU16 AtomicU32 AtomicUsize | |
2684 | } | |
2685 | ||
5099ac24 | 2686 | #[cfg(all(feature = "std", not(no_std_atomic64)))] |
e1599b0c XL |
2687 | atomic_impl! { |
2688 | AtomicI64 AtomicU64 | |
2689 | } | |
5869c6ff XL |
2690 | |
2691 | #[cfg(feature = "std")] | |
2692 | struct FromStrVisitor<T> { | |
2693 | expecting: &'static str, | |
2694 | ty: PhantomData<T>, | |
2695 | } | |
2696 | ||
2697 | #[cfg(feature = "std")] | |
2698 | impl<T> FromStrVisitor<T> { | |
2699 | fn new(expecting: &'static str) -> Self { | |
2700 | FromStrVisitor { | |
2701 | expecting: expecting, | |
2702 | ty: PhantomData, | |
2703 | } | |
2704 | } | |
2705 | } | |
2706 | ||
2707 | #[cfg(feature = "std")] | |
2708 | impl<'de, T> Visitor<'de> for FromStrVisitor<T> | |
2709 | where | |
2710 | T: str::FromStr, | |
2711 | T::Err: fmt::Display, | |
2712 | { | |
2713 | type Value = T; | |
2714 | ||
2715 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
2716 | formatter.write_str(self.expecting) | |
2717 | } | |
2718 | ||
2719 | fn visit_str<E>(self, s: &str) -> Result<Self::Value, E> | |
2720 | where | |
2721 | E: Error, | |
2722 | { | |
2723 | s.parse().map_err(Error::custom) | |
2724 | } | |
2725 | } |