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Commit | Line | Data |
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2c00a5a8 XL |
1 | use std::borrow::Borrow; |
2 | use std::cmp; | |
3 | use std::fmt; | |
4 | use std::hash::{Hash, Hasher}; | |
2c00a5a8 XL |
5 | use std::ptr; |
6 | use std::ops::{Deref, DerefMut}; | |
7 | use std::str; | |
f035d41b | 8 | use std::str::FromStr; |
2c00a5a8 XL |
9 | use std::str::Utf8Error; |
10 | use std::slice; | |
11 | ||
f035d41b XL |
12 | use crate::array::Array; |
13 | use crate::array::Index; | |
14 | use crate::CapacityError; | |
15 | use crate::char::encode_utf8; | |
2c00a5a8 | 16 | |
f035d41b | 17 | #[cfg(feature="serde")] |
2c00a5a8 XL |
18 | use serde::{Serialize, Deserialize, Serializer, Deserializer}; |
19 | ||
f035d41b XL |
20 | use super::MaybeUninit as MaybeUninitCopy; |
21 | ||
2c00a5a8 XL |
22 | /// A string with a fixed capacity. |
23 | /// | |
24 | /// The `ArrayString` is a string backed by a fixed size array. It keeps track | |
25 | /// of its length. | |
26 | /// | |
27 | /// The string is a contiguous value that you can store directly on the stack | |
28 | /// if needed. | |
29 | #[derive(Copy)] | |
f035d41b XL |
30 | pub struct ArrayString<A> |
31 | where A: Array<Item=u8> + Copy | |
32 | { | |
33 | xs: MaybeUninitCopy<A>, | |
2c00a5a8 XL |
34 | len: A::Index, |
35 | } | |
36 | ||
f035d41b XL |
37 | impl<A> Default for ArrayString<A> |
38 | where A: Array<Item=u8> + Copy | |
39 | { | |
2c00a5a8 XL |
40 | /// Return an empty `ArrayString` |
41 | fn default() -> ArrayString<A> { | |
42 | ArrayString::new() | |
43 | } | |
44 | } | |
45 | ||
f035d41b XL |
46 | impl<A> ArrayString<A> |
47 | where A: Array<Item=u8> + Copy | |
48 | { | |
2c00a5a8 XL |
49 | /// Create a new empty `ArrayString`. |
50 | /// | |
51 | /// Capacity is inferred from the type parameter. | |
52 | /// | |
53 | /// ``` | |
54 | /// use arrayvec::ArrayString; | |
55 | /// | |
56 | /// let mut string = ArrayString::<[_; 16]>::new(); | |
57 | /// string.push_str("foo"); | |
58 | /// assert_eq!(&string[..], "foo"); | |
59 | /// assert_eq!(string.capacity(), 16); | |
60 | /// ``` | |
61 | pub fn new() -> ArrayString<A> { | |
62 | unsafe { | |
63 | ArrayString { | |
f035d41b | 64 | xs: MaybeUninitCopy::uninitialized(), |
2c00a5a8 XL |
65 | len: Index::from(0), |
66 | } | |
67 | } | |
68 | } | |
69 | ||
f035d41b XL |
70 | /// Return the length of the string. |
71 | #[inline] | |
72 | pub fn len(&self) -> usize { self.len.to_usize() } | |
73 | ||
2c00a5a8 XL |
74 | /// Create a new `ArrayString` from a `str`. |
75 | /// | |
76 | /// Capacity is inferred from the type parameter. | |
77 | /// | |
78 | /// **Errors** if the backing array is not large enough to fit the string. | |
79 | /// | |
80 | /// ``` | |
81 | /// use arrayvec::ArrayString; | |
82 | /// | |
83 | /// let mut string = ArrayString::<[_; 3]>::from("foo").unwrap(); | |
84 | /// assert_eq!(&string[..], "foo"); | |
85 | /// assert_eq!(string.len(), 3); | |
86 | /// assert_eq!(string.capacity(), 3); | |
87 | /// ``` | |
88 | pub fn from(s: &str) -> Result<Self, CapacityError<&str>> { | |
89 | let mut arraystr = Self::new(); | |
90 | arraystr.try_push_str(s)?; | |
91 | Ok(arraystr) | |
92 | } | |
93 | ||
94 | /// Create a new `ArrayString` from a byte string literal. | |
95 | /// | |
96 | /// **Errors** if the byte string literal is not valid UTF-8. | |
97 | /// | |
98 | /// ``` | |
99 | /// use arrayvec::ArrayString; | |
100 | /// | |
101 | /// let string = ArrayString::from_byte_string(b"hello world").unwrap(); | |
102 | /// ``` | |
103 | pub fn from_byte_string(b: &A) -> Result<Self, Utf8Error> { | |
f035d41b XL |
104 | let len = str::from_utf8(b.as_slice())?.len(); |
105 | debug_assert_eq!(len, A::CAPACITY); | |
106 | Ok(ArrayString { | |
107 | xs: MaybeUninitCopy::from(*b), | |
108 | len: Index::from(A::CAPACITY), | |
109 | }) | |
2c00a5a8 XL |
110 | } |
111 | ||
112 | /// Return the capacity of the `ArrayString`. | |
113 | /// | |
114 | /// ``` | |
115 | /// use arrayvec::ArrayString; | |
116 | /// | |
117 | /// let string = ArrayString::<[_; 3]>::new(); | |
118 | /// assert_eq!(string.capacity(), 3); | |
119 | /// ``` | |
f035d41b XL |
120 | #[inline(always)] |
121 | pub fn capacity(&self) -> usize { A::CAPACITY } | |
2c00a5a8 XL |
122 | |
123 | /// Return if the `ArrayString` is completely filled. | |
124 | /// | |
125 | /// ``` | |
126 | /// use arrayvec::ArrayString; | |
127 | /// | |
128 | /// let mut string = ArrayString::<[_; 1]>::new(); | |
129 | /// assert!(!string.is_full()); | |
130 | /// string.push_str("A"); | |
131 | /// assert!(string.is_full()); | |
132 | /// ``` | |
133 | pub fn is_full(&self) -> bool { self.len() == self.capacity() } | |
134 | ||
135 | /// Adds the given char to the end of the string. | |
136 | /// | |
137 | /// ***Panics*** if the backing array is not large enough to fit the additional char. | |
138 | /// | |
139 | /// ``` | |
140 | /// use arrayvec::ArrayString; | |
141 | /// | |
142 | /// let mut string = ArrayString::<[_; 2]>::new(); | |
143 | /// | |
144 | /// string.push('a'); | |
145 | /// string.push('b'); | |
146 | /// | |
147 | /// assert_eq!(&string[..], "ab"); | |
148 | /// ``` | |
149 | pub fn push(&mut self, c: char) { | |
150 | self.try_push(c).unwrap(); | |
151 | } | |
152 | ||
153 | /// Adds the given char to the end of the string. | |
154 | /// | |
155 | /// Returns `Ok` if the push succeeds. | |
156 | /// | |
157 | /// **Errors** if the backing array is not large enough to fit the additional char. | |
158 | /// | |
159 | /// ``` | |
160 | /// use arrayvec::ArrayString; | |
161 | /// | |
162 | /// let mut string = ArrayString::<[_; 2]>::new(); | |
163 | /// | |
164 | /// string.try_push('a').unwrap(); | |
165 | /// string.try_push('b').unwrap(); | |
166 | /// let overflow = string.try_push('c'); | |
167 | /// | |
168 | /// assert_eq!(&string[..], "ab"); | |
169 | /// assert_eq!(overflow.unwrap_err().element(), 'c'); | |
170 | /// ``` | |
171 | pub fn try_push(&mut self, c: char) -> Result<(), CapacityError<char>> { | |
172 | let len = self.len(); | |
173 | unsafe { | |
f035d41b XL |
174 | let ptr = self.xs.ptr_mut().add(len); |
175 | let remaining_cap = self.capacity() - len; | |
176 | match encode_utf8(c, ptr, remaining_cap) { | |
2c00a5a8 XL |
177 | Ok(n) => { |
178 | self.set_len(len + n); | |
179 | Ok(()) | |
180 | } | |
181 | Err(_) => Err(CapacityError::new(c)), | |
182 | } | |
183 | } | |
184 | } | |
185 | ||
186 | /// Adds the given string slice to the end of the string. | |
187 | /// | |
188 | /// ***Panics*** if the backing array is not large enough to fit the string. | |
189 | /// | |
190 | /// ``` | |
191 | /// use arrayvec::ArrayString; | |
192 | /// | |
193 | /// let mut string = ArrayString::<[_; 2]>::new(); | |
194 | /// | |
195 | /// string.push_str("a"); | |
196 | /// string.push_str("d"); | |
197 | /// | |
198 | /// assert_eq!(&string[..], "ad"); | |
199 | /// ``` | |
200 | pub fn push_str(&mut self, s: &str) { | |
201 | self.try_push_str(s).unwrap() | |
202 | } | |
203 | ||
204 | /// Adds the given string slice to the end of the string. | |
205 | /// | |
206 | /// Returns `Ok` if the push succeeds. | |
207 | /// | |
208 | /// **Errors** if the backing array is not large enough to fit the string. | |
209 | /// | |
210 | /// ``` | |
211 | /// use arrayvec::ArrayString; | |
212 | /// | |
213 | /// let mut string = ArrayString::<[_; 2]>::new(); | |
214 | /// | |
215 | /// string.try_push_str("a").unwrap(); | |
216 | /// let overflow1 = string.try_push_str("bc"); | |
217 | /// string.try_push_str("d").unwrap(); | |
218 | /// let overflow2 = string.try_push_str("ef"); | |
219 | /// | |
220 | /// assert_eq!(&string[..], "ad"); | |
221 | /// assert_eq!(overflow1.unwrap_err().element(), "bc"); | |
222 | /// assert_eq!(overflow2.unwrap_err().element(), "ef"); | |
223 | /// ``` | |
224 | pub fn try_push_str<'a>(&mut self, s: &'a str) -> Result<(), CapacityError<&'a str>> { | |
225 | if s.len() > self.capacity() - self.len() { | |
226 | return Err(CapacityError::new(s)); | |
227 | } | |
228 | unsafe { | |
f035d41b | 229 | let dst = self.xs.ptr_mut().offset(self.len() as isize); |
2c00a5a8 XL |
230 | let src = s.as_ptr(); |
231 | ptr::copy_nonoverlapping(src, dst, s.len()); | |
232 | let newl = self.len() + s.len(); | |
233 | self.set_len(newl); | |
234 | } | |
235 | Ok(()) | |
236 | } | |
237 | ||
238 | /// Removes the last character from the string and returns it. | |
239 | /// | |
240 | /// Returns `None` if this `ArrayString` is empty. | |
241 | /// | |
242 | /// ``` | |
243 | /// use arrayvec::ArrayString; | |
244 | /// | |
245 | /// let mut s = ArrayString::<[_; 3]>::from("foo").unwrap(); | |
246 | /// | |
247 | /// assert_eq!(s.pop(), Some('o')); | |
248 | /// assert_eq!(s.pop(), Some('o')); | |
249 | /// assert_eq!(s.pop(), Some('f')); | |
250 | /// | |
251 | /// assert_eq!(s.pop(), None); | |
252 | /// ``` | |
2c00a5a8 XL |
253 | pub fn pop(&mut self) -> Option<char> { |
254 | let ch = match self.chars().rev().next() { | |
255 | Some(ch) => ch, | |
256 | None => return None, | |
257 | }; | |
258 | let new_len = self.len() - ch.len_utf8(); | |
259 | unsafe { | |
260 | self.set_len(new_len); | |
261 | } | |
262 | Some(ch) | |
263 | } | |
264 | ||
265 | /// Shortens this `ArrayString` to the specified length. | |
266 | /// | |
267 | /// If `new_len` is greater than the string’s current length, this has no | |
268 | /// effect. | |
269 | /// | |
270 | /// ***Panics*** if `new_len` does not lie on a `char` boundary. | |
271 | /// | |
272 | /// ``` | |
273 | /// use arrayvec::ArrayString; | |
274 | /// | |
275 | /// let mut string = ArrayString::<[_; 6]>::from("foobar").unwrap(); | |
276 | /// string.truncate(3); | |
277 | /// assert_eq!(&string[..], "foo"); | |
278 | /// string.truncate(4); | |
279 | /// assert_eq!(&string[..], "foo"); | |
280 | /// ``` | |
2c00a5a8 XL |
281 | pub fn truncate(&mut self, new_len: usize) { |
282 | if new_len <= self.len() { | |
283 | assert!(self.is_char_boundary(new_len)); | |
284 | unsafe { | |
285 | // In libstd truncate is called on the underlying vector, | |
286 | // which in turns drops each element. | |
287 | // As we know we don't have to worry about Drop, | |
288 | // we can just set the length (a la clear.) | |
289 | self.set_len(new_len); | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | /// Removes a `char` from this `ArrayString` at a byte position and returns it. | |
295 | /// | |
296 | /// This is an `O(n)` operation, as it requires copying every element in the | |
297 | /// array. | |
298 | /// | |
299 | /// ***Panics*** if `idx` is larger than or equal to the `ArrayString`’s length, | |
300 | /// or if it does not lie on a `char` boundary. | |
301 | /// | |
302 | /// ``` | |
303 | /// use arrayvec::ArrayString; | |
304 | /// | |
305 | /// let mut s = ArrayString::<[_; 3]>::from("foo").unwrap(); | |
306 | /// | |
307 | /// assert_eq!(s.remove(0), 'f'); | |
308 | /// assert_eq!(s.remove(1), 'o'); | |
309 | /// assert_eq!(s.remove(0), 'o'); | |
310 | /// ``` | |
2c00a5a8 XL |
311 | pub fn remove(&mut self, idx: usize) -> char { |
312 | let ch = match self[idx..].chars().next() { | |
313 | Some(ch) => ch, | |
314 | None => panic!("cannot remove a char from the end of a string"), | |
315 | }; | |
316 | ||
317 | let next = idx + ch.len_utf8(); | |
318 | let len = self.len(); | |
319 | unsafe { | |
f035d41b XL |
320 | ptr::copy(self.xs.ptr().offset(next as isize), |
321 | self.xs.ptr_mut().offset(idx as isize), | |
2c00a5a8 XL |
322 | len - next); |
323 | self.set_len(len - (next - idx)); | |
324 | } | |
325 | ch | |
326 | } | |
327 | ||
328 | /// Make the string empty. | |
329 | pub fn clear(&mut self) { | |
330 | unsafe { | |
331 | self.set_len(0); | |
332 | } | |
333 | } | |
334 | ||
335 | /// Set the strings’s length. | |
336 | /// | |
337 | /// This function is `unsafe` because it changes the notion of the | |
338 | /// number of “valid” bytes in the string. Use with care. | |
339 | /// | |
340 | /// This method uses *debug assertions* to check the validity of `length` | |
341 | /// and may use other debug assertions. | |
2c00a5a8 XL |
342 | pub unsafe fn set_len(&mut self, length: usize) { |
343 | debug_assert!(length <= self.capacity()); | |
344 | self.len = Index::from(length); | |
345 | } | |
346 | ||
347 | /// Return a string slice of the whole `ArrayString`. | |
348 | pub fn as_str(&self) -> &str { | |
349 | self | |
350 | } | |
2c00a5a8 XL |
351 | } |
352 | ||
f035d41b XL |
353 | impl<A> Deref for ArrayString<A> |
354 | where A: Array<Item=u8> + Copy | |
355 | { | |
2c00a5a8 XL |
356 | type Target = str; |
357 | #[inline] | |
358 | fn deref(&self) -> &str { | |
359 | unsafe { | |
f035d41b | 360 | let sl = slice::from_raw_parts(self.xs.ptr(), self.len.to_usize()); |
2c00a5a8 XL |
361 | str::from_utf8_unchecked(sl) |
362 | } | |
363 | } | |
364 | } | |
365 | ||
f035d41b XL |
366 | impl<A> DerefMut for ArrayString<A> |
367 | where A: Array<Item=u8> + Copy | |
368 | { | |
2c00a5a8 XL |
369 | #[inline] |
370 | fn deref_mut(&mut self) -> &mut str { | |
371 | unsafe { | |
f035d41b XL |
372 | let sl = slice::from_raw_parts_mut(self.xs.ptr_mut(), self.len.to_usize()); |
373 | str::from_utf8_unchecked_mut(sl) | |
2c00a5a8 XL |
374 | } |
375 | } | |
376 | } | |
377 | ||
f035d41b XL |
378 | impl<A> PartialEq for ArrayString<A> |
379 | where A: Array<Item=u8> + Copy | |
380 | { | |
2c00a5a8 XL |
381 | fn eq(&self, rhs: &Self) -> bool { |
382 | **self == **rhs | |
383 | } | |
384 | } | |
385 | ||
f035d41b XL |
386 | impl<A> PartialEq<str> for ArrayString<A> |
387 | where A: Array<Item=u8> + Copy | |
388 | { | |
2c00a5a8 XL |
389 | fn eq(&self, rhs: &str) -> bool { |
390 | &**self == rhs | |
391 | } | |
392 | } | |
393 | ||
f035d41b XL |
394 | impl<A> PartialEq<ArrayString<A>> for str |
395 | where A: Array<Item=u8> + Copy | |
396 | { | |
2c00a5a8 XL |
397 | fn eq(&self, rhs: &ArrayString<A>) -> bool { |
398 | self == &**rhs | |
399 | } | |
400 | } | |
401 | ||
f035d41b XL |
402 | impl<A> Eq for ArrayString<A> |
403 | where A: Array<Item=u8> + Copy | |
404 | { } | |
2c00a5a8 | 405 | |
f035d41b XL |
406 | impl<A> Hash for ArrayString<A> |
407 | where A: Array<Item=u8> + Copy | |
408 | { | |
2c00a5a8 XL |
409 | fn hash<H: Hasher>(&self, h: &mut H) { |
410 | (**self).hash(h) | |
411 | } | |
412 | } | |
413 | ||
f035d41b XL |
414 | impl<A> Borrow<str> for ArrayString<A> |
415 | where A: Array<Item=u8> + Copy | |
416 | { | |
2c00a5a8 XL |
417 | fn borrow(&self) -> &str { self } |
418 | } | |
419 | ||
f035d41b XL |
420 | impl<A> AsRef<str> for ArrayString<A> |
421 | where A: Array<Item=u8> + Copy | |
422 | { | |
2c00a5a8 XL |
423 | fn as_ref(&self) -> &str { self } |
424 | } | |
425 | ||
f035d41b XL |
426 | impl<A> fmt::Debug for ArrayString<A> |
427 | where A: Array<Item=u8> + Copy | |
428 | { | |
2c00a5a8 XL |
429 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { (**self).fmt(f) } |
430 | } | |
431 | ||
f035d41b XL |
432 | impl<A> fmt::Display for ArrayString<A> |
433 | where A: Array<Item=u8> + Copy | |
434 | { | |
2c00a5a8 XL |
435 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { (**self).fmt(f) } |
436 | } | |
437 | ||
438 | /// `Write` appends written data to the end of the string. | |
f035d41b XL |
439 | impl<A> fmt::Write for ArrayString<A> |
440 | where A: Array<Item=u8> + Copy | |
441 | { | |
2c00a5a8 XL |
442 | fn write_char(&mut self, c: char) -> fmt::Result { |
443 | self.try_push(c).map_err(|_| fmt::Error) | |
444 | } | |
445 | ||
446 | fn write_str(&mut self, s: &str) -> fmt::Result { | |
447 | self.try_push_str(s).map_err(|_| fmt::Error) | |
448 | } | |
449 | } | |
450 | ||
f035d41b XL |
451 | impl<A> Clone for ArrayString<A> |
452 | where A: Array<Item=u8> + Copy | |
453 | { | |
2c00a5a8 XL |
454 | fn clone(&self) -> ArrayString<A> { |
455 | *self | |
456 | } | |
457 | fn clone_from(&mut self, rhs: &Self) { | |
458 | // guaranteed to fit due to types matching. | |
459 | self.clear(); | |
460 | self.try_push_str(rhs).ok(); | |
461 | } | |
462 | } | |
463 | ||
f035d41b XL |
464 | impl<A> PartialOrd for ArrayString<A> |
465 | where A: Array<Item=u8> + Copy | |
466 | { | |
2c00a5a8 XL |
467 | fn partial_cmp(&self, rhs: &Self) -> Option<cmp::Ordering> { |
468 | (**self).partial_cmp(&**rhs) | |
469 | } | |
470 | fn lt(&self, rhs: &Self) -> bool { **self < **rhs } | |
471 | fn le(&self, rhs: &Self) -> bool { **self <= **rhs } | |
472 | fn gt(&self, rhs: &Self) -> bool { **self > **rhs } | |
473 | fn ge(&self, rhs: &Self) -> bool { **self >= **rhs } | |
474 | } | |
475 | ||
f035d41b XL |
476 | impl<A> PartialOrd<str> for ArrayString<A> |
477 | where A: Array<Item=u8> + Copy | |
478 | { | |
2c00a5a8 XL |
479 | fn partial_cmp(&self, rhs: &str) -> Option<cmp::Ordering> { |
480 | (**self).partial_cmp(rhs) | |
481 | } | |
482 | fn lt(&self, rhs: &str) -> bool { &**self < rhs } | |
483 | fn le(&self, rhs: &str) -> bool { &**self <= rhs } | |
484 | fn gt(&self, rhs: &str) -> bool { &**self > rhs } | |
485 | fn ge(&self, rhs: &str) -> bool { &**self >= rhs } | |
486 | } | |
487 | ||
f035d41b XL |
488 | impl<A> PartialOrd<ArrayString<A>> for str |
489 | where A: Array<Item=u8> + Copy | |
490 | { | |
2c00a5a8 XL |
491 | fn partial_cmp(&self, rhs: &ArrayString<A>) -> Option<cmp::Ordering> { |
492 | self.partial_cmp(&**rhs) | |
493 | } | |
494 | fn lt(&self, rhs: &ArrayString<A>) -> bool { self < &**rhs } | |
495 | fn le(&self, rhs: &ArrayString<A>) -> bool { self <= &**rhs } | |
496 | fn gt(&self, rhs: &ArrayString<A>) -> bool { self > &**rhs } | |
497 | fn ge(&self, rhs: &ArrayString<A>) -> bool { self >= &**rhs } | |
498 | } | |
499 | ||
f035d41b XL |
500 | impl<A> Ord for ArrayString<A> |
501 | where A: Array<Item=u8> + Copy | |
502 | { | |
2c00a5a8 XL |
503 | fn cmp(&self, rhs: &Self) -> cmp::Ordering { |
504 | (**self).cmp(&**rhs) | |
505 | } | |
506 | } | |
507 | ||
f035d41b XL |
508 | impl<A> FromStr for ArrayString<A> |
509 | where A: Array<Item=u8> + Copy | |
510 | { | |
511 | type Err = CapacityError; | |
512 | ||
513 | fn from_str(s: &str) -> Result<Self, Self::Err> { | |
514 | Self::from(s).map_err(CapacityError::simplify) | |
515 | } | |
516 | } | |
517 | ||
518 | #[cfg(feature="serde")] | |
519 | /// Requires crate feature `"serde"` | |
520 | impl<A> Serialize for ArrayString<A> | |
521 | where A: Array<Item=u8> + Copy | |
522 | { | |
2c00a5a8 XL |
523 | fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> |
524 | where S: Serializer | |
525 | { | |
526 | serializer.serialize_str(&*self) | |
527 | } | |
528 | } | |
529 | ||
f035d41b XL |
530 | #[cfg(feature="serde")] |
531 | /// Requires crate feature `"serde"` | |
532 | impl<'de, A> Deserialize<'de> for ArrayString<A> | |
533 | where A: Array<Item=u8> + Copy | |
534 | { | |
2c00a5a8 XL |
535 | fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> |
536 | where D: Deserializer<'de> | |
537 | { | |
538 | use serde::de::{self, Visitor}; | |
539 | use std::marker::PhantomData; | |
540 | ||
541 | struct ArrayStringVisitor<A: Array<Item=u8>>(PhantomData<A>); | |
542 | ||
f035d41b | 543 | impl<'de, A: Copy + Array<Item=u8>> Visitor<'de> for ArrayStringVisitor<A> { |
2c00a5a8 XL |
544 | type Value = ArrayString<A>; |
545 | ||
546 | fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | |
f035d41b | 547 | write!(formatter, "a string no more than {} bytes long", A::CAPACITY) |
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548 | } |
549 | ||
550 | fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> | |
551 | where E: de::Error, | |
552 | { | |
553 | ArrayString::from(v).map_err(|_| E::invalid_length(v.len(), &self)) | |
554 | } | |
555 | ||
556 | fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E> | |
557 | where E: de::Error, | |
558 | { | |
f035d41b | 559 | let s = str::from_utf8(v).map_err(|_| E::invalid_value(de::Unexpected::Bytes(v), &self))?; |
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560 | |
561 | ArrayString::from(s).map_err(|_| E::invalid_length(s.len(), &self)) | |
562 | } | |
563 | } | |
564 | ||
565 | deserializer.deserialize_str(ArrayStringVisitor::<A>(PhantomData)) | |
566 | } | |
567 | } |