magmaus3/continuwuity
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add expected! macro to checked math expression suite

Browse source 
Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-09-07 22:04:28 +00:00 • committed by strawberry
parent 2709995f84
commit 3d4b0f10a5
3 changed files with 29 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

36
src/core/utils/math.rs
View file

@ -7,32 +7,50 @@ use crate::{debug::type_name, err, Err, Error, Result};
/// Checked arithmetic expression. Returns a Result<R, Error::Arithmetic>
#[macro_export]
macro_rules! checked {
($($input:tt)*) => {
$crate::utils::math::checked_ops!($($input)*)
($($input:tt)+) => {
$crate::utils::math::checked_ops!($($input)+)
.ok_or_else(|| $crate::err!(Arithmetic("operation overflowed or result invalid")))
}
};
}
/// in release-mode. Use for performance when the expression is obviously safe.
/// The check remains in debug-mode for regression analysis.
/// Checked arithmetic expression which panics on failure. This is for
/// expressions which do not meet the threshold for validated! but the caller
/// has no realistic expectation for error and no interest in cluttering the
/// callsite with result handling from checked!.
#[macro_export]
macro_rules! expected {
($msg:literal, $($input:tt)+) => {
$crate::checked!($($input)+).expect($msg)
};
($($input:tt)+) => {
$crate::expected!("arithmetic expression expectation failure", $($input)+)
};
}
/// Unchecked arithmetic expression in release-mode. Use for performance when
/// the expression is obviously safe. The check remains in debug-mode for
/// regression analysis.
#[cfg(not(debug_assertions))]
#[macro_export]
macro_rules! validated {
($($input:tt)*) => {
($($input:tt)+) => {
//#[allow(clippy::arithmetic_side_effects)] {
//Some($($input)*)
// .ok_or_else(|| $crate::err!(Arithmetic("this error should never been seen")))
//}
//NOTE: remove me when stmt_expr_attributes is stable
$crate::checked!($($input)*)
}
$crate::expected!("validated arithmetic expression failed", $($input)+)
};
}
/// Checked arithmetic expression in debug-mode. Use for performance when
/// the expression is obviously safe. The check is elided in release-mode.
#[cfg(debug_assertions)]
#[macro_export]
macro_rules! validated {
($($input:tt)*) => { $crate::checked!($($input)*) }
($($input:tt)+) => { $crate::expected!($($input)+) }
}
/// Returns false if the exponential backoff has expired based on the inputs