1 use core::convert::TryFrom;
3 IntErrorKind, NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize,
4 NonZeroU128, NonZeroU16, NonZeroU32, NonZeroU64, NonZeroU8, NonZeroUsize,
6 use core::option::Option::{self, None, Some};
10 fn test_create_nonzero_instance() {
11 let _a = unsafe { NonZeroU32::new_unchecked(21) };
15 fn test_size_nonzero_in_option() {
16 assert_eq!(size_of::<NonZeroU32>(), size_of::<Option<NonZeroU32>>());
17 assert_eq!(size_of::<NonZeroI32>(), size_of::<Option<NonZeroI32>>());
21 fn test_match_on_nonzero_option() {
22 let a = Some(unsafe { NonZeroU32::new_unchecked(42) });
24 Some(val) => assert_eq!(val.get(), 42),
25 None => panic!("unexpected None while matching on Some(NonZeroU32(_))"),
28 match unsafe { Some(NonZeroU32::new_unchecked(43)) } {
29 Some(val) => assert_eq!(val.get(), 43),
30 None => panic!("unexpected None while matching on Some(NonZeroU32(_))"),
35 fn test_match_option_empty_vec() {
36 let a: Option<Vec<isize>> = Some(vec![]);
38 None => panic!("unexpected None while matching on Some(vec![])"),
44 fn test_match_option_vec() {
45 let a = Some(vec![1, 2, 3, 4]);
47 Some(v) => assert_eq!(v, [1, 2, 3, 4]),
48 None => panic!("unexpected None while matching on Some(vec![1, 2, 3, 4])"),
53 fn test_match_option_rc() {
56 let five = Rc::new(5);
58 Some(r) => assert_eq!(*r, 5),
59 None => panic!("unexpected None while matching on Some(Rc::new(5))"),
64 fn test_match_option_arc() {
67 let five = Arc::new(5);
69 Some(a) => assert_eq!(*a, 5),
70 None => panic!("unexpected None while matching on Some(Arc::new(5))"),
75 fn test_match_option_empty_string() {
76 let a = Some(String::new());
78 None => panic!("unexpected None while matching on Some(String::new())"),
84 fn test_match_option_string() {
85 let five = "Five".to_string();
87 Some(s) => assert_eq!(s, "Five"),
88 None => panic!("{}", "unexpected None while matching on Some(String { ... })"),
93 use core::num::NonZeroU32;
95 #[derive(PartialEq, Eq)]
97 index: NonZeroU32, // private
99 pub const FOO_ATOM: Atom = Atom { index: unsafe { NonZeroU32::new_unchecked(7) } };
109 fn test_match_nonzero_const_pattern() {
111 // Using as a pattern is supported by the compiler:
113 _ => panic!("Expected the const item as a pattern to match."),
118 fn test_from_nonzero() {
119 let nz = NonZeroU32::new(1).unwrap();
120 let num: u32 = nz.into();
121 assert_eq!(num, 1u32);
125 fn test_from_signed_nonzero() {
126 let nz = NonZeroI32::new(1).unwrap();
127 let num: i32 = nz.into();
128 assert_eq!(num, 1i32);
133 assert_eq!("123".parse::<NonZeroU8>(), Ok(NonZeroU8::new(123).unwrap()));
134 assert_eq!("0".parse::<NonZeroU8>().err().map(|e| e.kind().clone()), Some(IntErrorKind::Zero));
136 "-1".parse::<NonZeroU8>().err().map(|e| e.kind().clone()),
137 Some(IntErrorKind::InvalidDigit)
140 "-129".parse::<NonZeroI8>().err().map(|e| e.kind().clone()),
141 Some(IntErrorKind::NegOverflow)
144 "257".parse::<NonZeroU8>().err().map(|e| e.kind().clone()),
145 Some(IntErrorKind::PosOverflow)
150 fn test_nonzero_bitor() {
151 let nz_alt = NonZeroU8::new(0b1010_1010).unwrap();
152 let nz_low = NonZeroU8::new(0b0000_1111).unwrap();
154 let both_nz: NonZeroU8 = nz_alt | nz_low;
155 assert_eq!(both_nz.get(), 0b1010_1111);
157 let rhs_int: NonZeroU8 = nz_low | 0b1100_0000u8;
158 assert_eq!(rhs_int.get(), 0b1100_1111);
160 let rhs_zero: NonZeroU8 = nz_alt | 0u8;
161 assert_eq!(rhs_zero.get(), 0b1010_1010);
163 let lhs_int: NonZeroU8 = 0b0110_0110u8 | nz_alt;
164 assert_eq!(lhs_int.get(), 0b1110_1110);
166 let lhs_zero: NonZeroU8 = 0u8 | nz_low;
167 assert_eq!(lhs_zero.get(), 0b0000_1111);
171 fn test_nonzero_bitor_assign() {
172 let mut target = NonZeroU8::new(0b1010_1010).unwrap();
174 target |= NonZeroU8::new(0b0000_1111).unwrap();
175 assert_eq!(target.get(), 0b1010_1111);
177 target |= 0b0001_0000;
178 assert_eq!(target.get(), 0b1011_1111);
181 assert_eq!(target.get(), 0b1011_1111);
185 fn test_nonzero_from_int_on_success() {
186 assert_eq!(NonZeroU8::try_from(5), Ok(NonZeroU8::new(5).unwrap()));
187 assert_eq!(NonZeroU32::try_from(5), Ok(NonZeroU32::new(5).unwrap()));
189 assert_eq!(NonZeroI8::try_from(-5), Ok(NonZeroI8::new(-5).unwrap()));
190 assert_eq!(NonZeroI32::try_from(-5), Ok(NonZeroI32::new(-5).unwrap()));
194 fn test_nonzero_from_int_on_err() {
195 assert!(NonZeroU8::try_from(0).is_err());
196 assert!(NonZeroU32::try_from(0).is_err());
198 assert!(NonZeroI8::try_from(0).is_err());
199 assert!(NonZeroI32::try_from(0).is_err());
204 // test that the methods of `NonZeroX>` are usable in a const context
205 // Note: only tests NonZero8
207 const NONZERO_U8: NonZeroU8 = unsafe { NonZeroU8::new_unchecked(5) };
209 const GET: u8 = NONZERO_U8.get();
212 const ZERO: Option<NonZeroU8> = NonZeroU8::new(0);
213 assert!(ZERO.is_none());
215 const ONE: Option<NonZeroU8> = NonZeroU8::new(1);
216 assert!(ONE.is_some());
218 const FROM_NONZERO_U8: u8 = u8::from(NONZERO_U8);
219 assert_eq!(FROM_NONZERO_U8, 5);
221 const NONZERO_CONVERT: NonZeroU32 = NonZeroU32::from(NONZERO_U8);
222 assert_eq!(NONZERO_CONVERT.get(), 5);
226 fn nonzero_leading_zeros() {
227 assert_eq!(NonZeroU8::new(1).unwrap().leading_zeros(), 7);
228 assert_eq!(NonZeroI8::new(1).unwrap().leading_zeros(), 7);
229 assert_eq!(NonZeroU16::new(1).unwrap().leading_zeros(), 15);
230 assert_eq!(NonZeroI16::new(1).unwrap().leading_zeros(), 15);
231 assert_eq!(NonZeroU32::new(1).unwrap().leading_zeros(), 31);
232 assert_eq!(NonZeroI32::new(1).unwrap().leading_zeros(), 31);
233 assert_eq!(NonZeroU64::new(1).unwrap().leading_zeros(), 63);
234 assert_eq!(NonZeroI64::new(1).unwrap().leading_zeros(), 63);
235 assert_eq!(NonZeroU128::new(1).unwrap().leading_zeros(), 127);
236 assert_eq!(NonZeroI128::new(1).unwrap().leading_zeros(), 127);
237 assert_eq!(NonZeroUsize::new(1).unwrap().leading_zeros(), usize::BITS - 1);
238 assert_eq!(NonZeroIsize::new(1).unwrap().leading_zeros(), usize::BITS - 1);
240 assert_eq!(NonZeroU8::new(u8::MAX >> 2).unwrap().leading_zeros(), 2);
241 assert_eq!(NonZeroI8::new((u8::MAX >> 2) as i8).unwrap().leading_zeros(), 2);
242 assert_eq!(NonZeroU16::new(u16::MAX >> 2).unwrap().leading_zeros(), 2);
243 assert_eq!(NonZeroI16::new((u16::MAX >> 2) as i16).unwrap().leading_zeros(), 2);
244 assert_eq!(NonZeroU32::new(u32::MAX >> 2).unwrap().leading_zeros(), 2);
245 assert_eq!(NonZeroI32::new((u32::MAX >> 2) as i32).unwrap().leading_zeros(), 2);
246 assert_eq!(NonZeroU64::new(u64::MAX >> 2).unwrap().leading_zeros(), 2);
247 assert_eq!(NonZeroI64::new((u64::MAX >> 2) as i64).unwrap().leading_zeros(), 2);
248 assert_eq!(NonZeroU128::new(u128::MAX >> 2).unwrap().leading_zeros(), 2);
249 assert_eq!(NonZeroI128::new((u128::MAX >> 2) as i128).unwrap().leading_zeros(), 2);
250 assert_eq!(NonZeroUsize::new(usize::MAX >> 2).unwrap().leading_zeros(), 2);
251 assert_eq!(NonZeroIsize::new((usize::MAX >> 2) as isize).unwrap().leading_zeros(), 2);
253 assert_eq!(NonZeroU8::new(u8::MAX).unwrap().leading_zeros(), 0);
254 assert_eq!(NonZeroI8::new(-1i8).unwrap().leading_zeros(), 0);
255 assert_eq!(NonZeroU16::new(u16::MAX).unwrap().leading_zeros(), 0);
256 assert_eq!(NonZeroI16::new(-1i16).unwrap().leading_zeros(), 0);
257 assert_eq!(NonZeroU32::new(u32::MAX).unwrap().leading_zeros(), 0);
258 assert_eq!(NonZeroI32::new(-1i32).unwrap().leading_zeros(), 0);
259 assert_eq!(NonZeroU64::new(u64::MAX).unwrap().leading_zeros(), 0);
260 assert_eq!(NonZeroI64::new(-1i64).unwrap().leading_zeros(), 0);
261 assert_eq!(NonZeroU128::new(u128::MAX).unwrap().leading_zeros(), 0);
262 assert_eq!(NonZeroI128::new(-1i128).unwrap().leading_zeros(), 0);
263 assert_eq!(NonZeroUsize::new(usize::MAX).unwrap().leading_zeros(), 0);
264 assert_eq!(NonZeroIsize::new(-1isize).unwrap().leading_zeros(), 0);
266 const LEADING_ZEROS: u32 = NonZeroU16::new(1).unwrap().leading_zeros();
267 assert_eq!(LEADING_ZEROS, 15);
271 fn nonzero_trailing_zeros() {
272 assert_eq!(NonZeroU8::new(1).unwrap().trailing_zeros(), 0);
273 assert_eq!(NonZeroI8::new(1).unwrap().trailing_zeros(), 0);
274 assert_eq!(NonZeroU16::new(1).unwrap().trailing_zeros(), 0);
275 assert_eq!(NonZeroI16::new(1).unwrap().trailing_zeros(), 0);
276 assert_eq!(NonZeroU32::new(1).unwrap().trailing_zeros(), 0);
277 assert_eq!(NonZeroI32::new(1).unwrap().trailing_zeros(), 0);
278 assert_eq!(NonZeroU64::new(1).unwrap().trailing_zeros(), 0);
279 assert_eq!(NonZeroI64::new(1).unwrap().trailing_zeros(), 0);
280 assert_eq!(NonZeroU128::new(1).unwrap().trailing_zeros(), 0);
281 assert_eq!(NonZeroI128::new(1).unwrap().trailing_zeros(), 0);
282 assert_eq!(NonZeroUsize::new(1).unwrap().trailing_zeros(), 0);
283 assert_eq!(NonZeroIsize::new(1).unwrap().trailing_zeros(), 0);
285 assert_eq!(NonZeroU8::new(1 << 2).unwrap().trailing_zeros(), 2);
286 assert_eq!(NonZeroI8::new(1 << 2).unwrap().trailing_zeros(), 2);
287 assert_eq!(NonZeroU16::new(1 << 2).unwrap().trailing_zeros(), 2);
288 assert_eq!(NonZeroI16::new(1 << 2).unwrap().trailing_zeros(), 2);
289 assert_eq!(NonZeroU32::new(1 << 2).unwrap().trailing_zeros(), 2);
290 assert_eq!(NonZeroI32::new(1 << 2).unwrap().trailing_zeros(), 2);
291 assert_eq!(NonZeroU64::new(1 << 2).unwrap().trailing_zeros(), 2);
292 assert_eq!(NonZeroI64::new(1 << 2).unwrap().trailing_zeros(), 2);
293 assert_eq!(NonZeroU128::new(1 << 2).unwrap().trailing_zeros(), 2);
294 assert_eq!(NonZeroI128::new(1 << 2).unwrap().trailing_zeros(), 2);
295 assert_eq!(NonZeroUsize::new(1 << 2).unwrap().trailing_zeros(), 2);
296 assert_eq!(NonZeroIsize::new(1 << 2).unwrap().trailing_zeros(), 2);
298 assert_eq!(NonZeroU8::new(1 << 7).unwrap().trailing_zeros(), 7);
299 assert_eq!(NonZeroI8::new(1 << 7).unwrap().trailing_zeros(), 7);
300 assert_eq!(NonZeroU16::new(1 << 15).unwrap().trailing_zeros(), 15);
301 assert_eq!(NonZeroI16::new(1 << 15).unwrap().trailing_zeros(), 15);
302 assert_eq!(NonZeroU32::new(1 << 31).unwrap().trailing_zeros(), 31);
303 assert_eq!(NonZeroI32::new(1 << 31).unwrap().trailing_zeros(), 31);
304 assert_eq!(NonZeroU64::new(1 << 63).unwrap().trailing_zeros(), 63);
305 assert_eq!(NonZeroI64::new(1 << 63).unwrap().trailing_zeros(), 63);
306 assert_eq!(NonZeroU128::new(1 << 127).unwrap().trailing_zeros(), 127);
307 assert_eq!(NonZeroI128::new(1 << 127).unwrap().trailing_zeros(), 127);
310 NonZeroUsize::new(1 << (usize::BITS - 1)).unwrap().trailing_zeros(),
314 NonZeroIsize::new(1 << (usize::BITS - 1)).unwrap().trailing_zeros(),
318 const TRAILING_ZEROS: u32 = NonZeroU16::new(1 << 2).unwrap().trailing_zeros();
319 assert_eq!(TRAILING_ZEROS, 2);
323 fn test_nonzero_uint_div() {
324 let nz = NonZeroU32::new(1).unwrap();
326 let x: u32 = 42u32 / nz;
327 assert_eq!(x, 42u32);
331 fn test_nonzero_uint_rem() {
332 let nz = NonZeroU32::new(10).unwrap();
334 let x: u32 = 42u32 % nz;