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Unindent nonzero_integer macro body
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‎library/core/src/num/nonzero.rs

Lines changed: 139 additions & 139 deletions
Original file line numberDiff line numberDiff line change
@@ -26,167 +26,167 @@ macro_rules! nonzero_integer {
2626
(
2727
#[$stability:meta] #[$const_new_unchecked_stability:meta] $Ty:ident($Int:ty);
2828
) => {
29-
/// An integer that is known not to equal zero.
29+
/// An integer that is known not to equal zero.
30+
///
31+
/// This enables some memory layout optimization.
32+
#[doc = concat!("For example, `Option<", stringify!($Ty), ">` is the same size as `", stringify!($Int), "`:")]
33+
///
34+
/// ```rust
35+
/// use std::mem::size_of;
36+
#[doc = concat!("assert_eq!(size_of::<Option<core::num::", stringify!($Ty), ">>(), size_of::<", stringify!($Int), ">());")]
37+
/// ```
38+
///
39+
/// # Layout
40+
///
41+
#[doc = concat!("`", stringify!($Ty), "` is guaranteed to have the same layout and bit validity as `", stringify!($Int), "`")]
42+
/// with the exception that `0` is not a valid instance.
43+
#[doc = concat!("`Option<", stringify!($Ty), ">` is guaranteed to be compatible with `", stringify!($Int), "`,")]
44+
/// including in FFI.
45+
///
46+
/// Thanks to the [null pointer optimization],
47+
#[doc = concat!("`", stringify!($Ty), "` and `Option<", stringify!($Ty), ">`")]
48+
/// are guaranteed to have the same size and alignment:
49+
///
50+
/// ```
51+
/// # use std::mem::{size_of, align_of};
52+
#[doc = concat!("use std::num::", stringify!($Ty), ";")]
53+
///
54+
#[doc = concat!("assert_eq!(size_of::<", stringify!($Ty), ">(), size_of::<Option<", stringify!($Ty), ">>());")]
55+
#[doc = concat!("assert_eq!(align_of::<", stringify!($Ty), ">(), align_of::<Option<", stringify!($Ty), ">>());")]
56+
/// ```
57+
///
58+
/// [null pointer optimization]: crate::option#representation
59+
#[$stability]
60+
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
61+
#[repr(transparent)]
62+
#[rustc_layout_scalar_valid_range_start(1)]
63+
#[rustc_nonnull_optimization_guaranteed]
64+
#[rustc_diagnostic_item = stringify!($Ty)]
65+
pub struct $Ty($Int);
66+
67+
impl $Ty {
68+
/// Creates a non-zero without checking whether the value is non-zero.
69+
/// This results in undefined behaviour if the value is zero.
3070
///
31-
/// This enables some memory layout optimization.
32-
#[doc = concat!("For example, `Option<", stringify!($Ty), ">` is the same size as `", stringify!($Int), "`:")]
71+
/// # Safety
3372
///
34-
/// ```rust
35-
/// use std::mem::size_of;
36-
#[doc = concat!("assert_eq!(size_of::<Option<core::num::", stringify!($Ty), ">>(), size_of::<", stringify!($Int), ">());")]
37-
/// ```
38-
///
39-
/// # Layout
40-
///
41-
#[doc = concat!("`", stringify!($Ty), "` is guaranteed to have the same layout and bit validity as `", stringify!($Int), "`")]
42-
/// with the exception that `0` is not a valid instance.
43-
#[doc = concat!("`Option<", stringify!($Ty), ">` is guaranteed to be compatible with `", stringify!($Int), "`,")]
44-
/// including in FFI.
45-
///
46-
/// Thanks to the [null pointer optimization],
47-
#[doc = concat!("`", stringify!($Ty), "` and `Option<", stringify!($Ty), ">`")]
48-
/// are guaranteed to have the same size and alignment:
49-
///
50-
/// ```
51-
/// # use std::mem::{size_of, align_of};
52-
#[doc = concat!("use std::num::", stringify!($Ty), ";")]
53-
///
54-
#[doc = concat!("assert_eq!(size_of::<", stringify!($Ty), ">(), size_of::<Option<", stringify!($Ty), ">>());")]
55-
#[doc = concat!("assert_eq!(align_of::<", stringify!($Ty), ">(), align_of::<Option<", stringify!($Ty), ">>());")]
56-
/// ```
57-
///
58-
/// [null pointer optimization]: crate::option#representation
73+
/// The value must not be zero.
5974
#[$stability]
60-
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
61-
#[repr(transparent)]
62-
#[rustc_layout_scalar_valid_range_start(1)]
63-
#[rustc_nonnull_optimization_guaranteed]
64-
#[rustc_diagnostic_item = stringify!($Ty)]
65-
pub struct $Ty($Int);
66-
67-
impl $Ty {
68-
/// Creates a non-zero without checking whether the value is non-zero.
69-
/// This results in undefined behaviour if the value is zero.
70-
///
71-
/// # Safety
72-
///
73-
/// The value must not be zero.
74-
#[$stability]
75-
#[$const_new_unchecked_stability]
76-
#[must_use]
77-
#[inline]
78-
pub const unsafe fn new_unchecked(n: $Int) -> Self {
79-
crate::panic::debug_assert_nounwind!(
80-
n != 0,
81-
concat!(stringify!($Ty), "::new_unchecked requires a non-zero argument")
82-
);
83-
// SAFETY: this is guaranteed to be safe by the caller.
84-
unsafe {
85-
Self(n)
86-
}
87-
}
88-
89-
/// Creates a non-zero if the given value is not zero.
90-
#[$stability]
91-
#[rustc_const_stable(feature = "const_nonzero_int_methods", since = "1.47.0")]
92-
#[must_use]
93-
#[inline]
94-
pub const fn new(n: $Int) -> Option<Self> {
95-
if n != 0 {
96-
// SAFETY: we just checked that there's no `0`
97-
Some(unsafe { Self(n) })
98-
} else {
99-
None
100-
}
75+
#[$const_new_unchecked_stability]
76+
#[must_use]
77+
#[inline]
78+
pub const unsafe fn new_unchecked(n: $Int) -> Self {
79+
crate::panic::debug_assert_nounwind!(
80+
n != 0,
81+
concat!(stringify!($Ty), "::new_unchecked requires a non-zero argument")
82+
);
83+
// SAFETY: this is guaranteed to be safe by the caller.
84+
unsafe {
85+
Self(n)
10186
}
87+
}
10288

103-
/// Returns the value as a primitive type.
104-
#[$stability]
105-
#[inline]
106-
#[rustc_const_stable(feature = "const_nonzero_get", since = "1.34.0")]
107-
pub const fn get(self) -> $Int {
108-
// FIXME: Remove this after LLVM supports `!range` metadata for function
109-
// arguments https://github.com/llvm/llvm-project/issues/76628
110-
//
111-
// Rustc can set range metadata only if it loads `self` from
112-
// memory somewhere. If the value of `self` was from by-value argument
113-
// of some not-inlined function, LLVM don't have range metadata
114-
// to understand that the value cannot be zero.
115-
116-
// SAFETY: It is an invariant of this type.
117-
unsafe {
118-
intrinsics::assume(self.0 != 0);
119-
}
120-
self.0
89+
/// Creates a non-zero if the given value is not zero.
90+
#[$stability]
91+
#[rustc_const_stable(feature = "const_nonzero_int_methods", since = "1.47.0")]
92+
#[must_use]
93+
#[inline]
94+
pub const fn new(n: $Int) -> Option<Self> {
95+
if n != 0 {
96+
// SAFETY: we just checked that there's no `0`
97+
Some(unsafe { Self(n) })
98+
} else {
99+
None
121100
}
122-
123101
}
124102

125-
#[stable(feature = "from_nonzero", since = "1.31.0")]
126-
impl From<$Ty> for $Int {
127-
#[doc = concat!("Converts a `", stringify!($Ty), "` into an `", stringify!($Int), "`")]
128-
#[inline]
129-
fn from(nonzero: $Ty) -> Self {
130-
// Call nonzero to keep information range information
131-
// from get method.
132-
nonzero.get()
103+
/// Returns the value as a primitive type.
104+
#[$stability]
105+
#[inline]
106+
#[rustc_const_stable(feature = "const_nonzero_get", since = "1.34.0")]
107+
pub const fn get(self) -> $Int {
108+
// FIXME: Remove this after LLVM supports `!range` metadata for function
109+
// arguments https://github.com/llvm/llvm-project/issues/76628
110+
//
111+
// Rustc can set range metadata only if it loads `self` from
112+
// memory somewhere. If the value of `self` was from by-value argument
113+
// of some not-inlined function, LLVM don't have range metadata
114+
// to understand that the value cannot be zero.
115+
116+
// SAFETY: It is an invariant of this type.
117+
unsafe {
118+
intrinsics::assume(self.0 != 0);
133119
}
120+
self.0
134121
}
135122

136-
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
137-
impl BitOr for $Ty {
138-
type Output = Self;
139-
#[inline]
140-
fn bitor(self, rhs: Self) -> Self::Output {
141-
// SAFETY: since `self` and `rhs` are both nonzero, the
142-
// result of the bitwise-or will be nonzero.
143-
unsafe { $Ty::new_unchecked(self.get() | rhs.get()) }
144-
}
123+
}
124+
125+
#[stable(feature = "from_nonzero", since = "1.31.0")]
126+
impl From<$Ty> for $Int {
127+
#[doc = concat!("Converts a `", stringify!($Ty), "` into an `", stringify!($Int), "`")]
128+
#[inline]
129+
fn from(nonzero: $Ty) -> Self {
130+
// Call nonzero to keep information range information
131+
// from get method.
132+
nonzero.get()
145133
}
134+
}
146135

147-
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
148-
impl BitOr<$Int> for $Ty {
149-
type Output = Self;
150-
#[inline]
151-
fn bitor(self, rhs: $Int) -> Self::Output {
152-
// SAFETY: since `self` is nonzero, the result of the
153-
// bitwise-or will be nonzero regardless of the value of
154-
// `rhs`.
155-
unsafe { $Ty::new_unchecked(self.get() | rhs) }
156-
}
136+
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
137+
impl BitOr for $Ty {
138+
type Output = Self;
139+
#[inline]
140+
fn bitor(self, rhs: Self) -> Self::Output {
141+
// SAFETY: since `self` and `rhs` are both nonzero, the
142+
// result of the bitwise-or will be nonzero.
143+
unsafe { $Ty::new_unchecked(self.get() | rhs.get()) }
157144
}
145+
}
158146

159-
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
160-
impl BitOr<$Ty> for $Int {
161-
type Output = $Ty;
162-
#[inline]
163-
fn bitor(self, rhs: $Ty) -> Self::Output {
164-
// SAFETY: since `rhs` is nonzero, the result of the
165-
// bitwise-or will be nonzero regardless of the value of
166-
// `self`.
167-
unsafe { $Ty::new_unchecked(self | rhs.get()) }
168-
}
147+
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
148+
impl BitOr<$Int> for $Ty {
149+
type Output = Self;
150+
#[inline]
151+
fn bitor(self, rhs: $Int) -> Self::Output {
152+
// SAFETY: since `self` is nonzero, the result of the
153+
// bitwise-or will be nonzero regardless of the value of
154+
// `rhs`.
155+
unsafe { $Ty::new_unchecked(self.get() | rhs) }
169156
}
157+
}
170158

171-
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
172-
impl BitOrAssign for $Ty {
173-
#[inline]
174-
fn bitor_assign(&mut self, rhs: Self) {
175-
*self = *self | rhs;
176-
}
159+
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
160+
impl BitOr<$Ty> for $Int {
161+
type Output = $Ty;
162+
#[inline]
163+
fn bitor(self, rhs: $Ty) -> Self::Output {
164+
// SAFETY: since `rhs` is nonzero, the result of the
165+
// bitwise-or will be nonzero regardless of the value of
166+
// `self`.
167+
unsafe { $Ty::new_unchecked(self | rhs.get()) }
177168
}
169+
}
178170

179-
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
180-
impl BitOrAssign<$Int> for $Ty {
181-
#[inline]
182-
fn bitor_assign(&mut self, rhs: $Int) {
183-
*self = *self | rhs;
184-
}
171+
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
172+
impl BitOrAssign for $Ty {
173+
#[inline]
174+
fn bitor_assign(&mut self, rhs: Self) {
175+
*self = *self | rhs;
185176
}
177+
}
186178

187-
impl_nonzero_fmt! {
188-
#[$stability] (Debug, Display, Binary, Octal, LowerHex, UpperHex) for $Ty
179+
#[stable(feature = "nonzero_bitor", since = "1.45.0")]
180+
impl BitOrAssign<$Int> for $Ty {
181+
#[inline]
182+
fn bitor_assign(&mut self, rhs: $Int) {
183+
*self = *self | rhs;
189184
}
185+
}
186+
187+
impl_nonzero_fmt! {
188+
#[$stability] (Debug, Display, Binary, Octal, LowerHex, UpperHex) for $Ty
189+
}
190190
};
191191
}
192192

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