/rust/registry/src/index.crates.io-1949cf8c6b5b557f/time-0.3.55/src/parsing/shim.rs

Source
//! Extension traits for things either not implemented or not yet stable in the MSRV.

/// Marker trait for integer types.
pub(crate) trait Integer: Sized {
    /// The maximum number of digits that this type can have.
    const MAX_NUM_DIGITS: u8;
    /// The zero value for this type.
    const ZERO: Self;

    /// Push a digit onto the end of this integer, assuming no overflow.
    ///
    /// This is equivalent to `self * 10 + digit`.
    fn push_digit(self, digit: u8) -> Self;

    /// Push a digit onto the end of this integer, returning `None` on overflow.
    ///
    /// This is equivalent to `self.checked_mul(10)?.checked_add(digit)`.
    fn checked_push_digit(self, digit: u8) -> Option<Self>;
}

/// Parse the given types from bytes.
macro_rules! impl_parse_bytes {
    ($($t:ty)*) => ($(
        impl Integer for $t {
            const MAX_NUM_DIGITS: u8 = match Self::MAX.checked_ilog10() {
                Some(digits) => digits as u8 + 1,
                None => 1,
            };

            const ZERO: Self = 0;

            #[allow(trivial_numeric_casts, reason = "macro-generated code")]
            #[inline]
            fn push_digit(self, digit: u8) -> Self {
                self * 10 + digit as Self
            }

            #[allow(trivial_numeric_casts, reason = "macro-generated code")]
            #[inline]
            fn checked_push_digit(self, digit: u8) -> Option<Self> {
                self.checked_mul(10)?.checked_add(digit as Self)
            }
        }
    )*)
}
impl_parse_bytes! { u8 u16 u32 u128 }

Coverage Report

Created: 2026-08-14 06:28

Line	Count	Source
1		//! Extension traits for things either not implemented or not yet stable in the MSRV.
2
3		/// Marker trait for integer types.
4		pub(crate) trait Integer: Sized {
5		/// The maximum number of digits that this type can have.
6		const MAX_NUM_DIGITS: u8;
7		/// The zero value for this type.
8		const ZERO: Self;
9
10		/// Push a digit onto the end of this integer, assuming no overflow.
11		///
12		/// This is equivalent to `self * 10 + digit`.
13		fn push_digit(self, digit: u8) -> Self;
14
15		/// Push a digit onto the end of this integer, returning `None` on overflow.
16		///
17		/// This is equivalent to `self.checked_mul(10)?.checked_add(digit)`.
18		fn checked_push_digit(self, digit: u8) -> Option<Self>;
19		}
20
21		/// Parse the given types from bytes.
22		macro_rules! impl_parse_bytes {
23		($($t:ty)*) => ($(
24		impl Integer for $t {
25		const MAX_NUM_DIGITS: u8 = match Self::MAX.checked_ilog10() {
26		Some(digits) => digits as u8 + 1,
27		None => 1,
28		};
29
30		const ZERO: Self = 0;
31
32		#[allow(trivial_numeric_casts, reason = "macro-generated code")]
33		#[inline]
34	0	fn push_digit(self, digit: u8) -> Self {
35	0	self * 10 + digit as Self
36	0	} Unexecuted instantiation: <u8 as time::parsing::shim::Integer>::push_digit Unexecuted instantiation: <u32 as time::parsing::shim::Integer>::push_digit Unexecuted instantiation: <u128 as time::parsing::shim::Integer>::push_digit Unexecuted instantiation: <u16 as time::parsing::shim::Integer>::push_digit
37
38		#[allow(trivial_numeric_casts, reason = "macro-generated code")]
39		#[inline]
40	0	fn checked_push_digit(self, digit: u8) -> Option<Self> {
41	0	self.checked_mul(10)?.checked_add(digit as Self)
42	0	} Unexecuted instantiation: <u8 as time::parsing::shim::Integer>::checked_push_digit Unexecuted instantiation: <u32 as time::parsing::shim::Integer>::checked_push_digit Unexecuted instantiation: <u128 as time::parsing::shim::Integer>::checked_push_digit Unexecuted instantiation: <u16 as time::parsing::shim::Integer>::checked_push_digit
43		}
44		)*)
45		}
46		impl_parse_bytes! { u8 u16 u32 u128 }