lexical_util/
assert.rs

1//! Debugging assertions to check a radix is valid.
2
3#[cfg(feature = "write")]
4use crate::constants::FormattedSize;
5
6// RADIX
7
8/// Check radix is in range `[2, 36]` in debug builds.
9#[inline(always)]
10#[cfg(feature = "radix")]
11pub fn debug_assert_radix(radix: u32) {
12    debug_assert!((2..=36).contains(&radix), "Numerical base must be from 2-36.");
13}
14
15/// Check radix is is 10 or a power of 2.
16#[inline(always)]
17#[cfg(all(feature = "power-of-two", not(feature = "radix")))]
18pub fn debug_assert_radix(radix: u32) {
19    debug_assert!(matches!(radix, 2 | 4 | 8 | 10 | 16 | 32), "Numerical base must be from 2-36.");
20}
21
22/// Check radix is equal to 10.
23#[inline(always)]
24#[cfg(not(feature = "power-of-two"))]
25pub fn debug_assert_radix(radix: u32) {
26    debug_assert!(radix == 10, "Numerical base must be 10.");
27}
28
29// BUFFER
30
31/// Assertion the buffer has sufficient room for the output.
32#[inline(always)]
33#[cfg(all(feature = "power-of-two", feature = "write"))]
34pub fn assert_buffer<T: FormattedSize>(radix: u32, len: usize) {
35    assert!(
36        match radix {
37            10 => len >= T::FORMATTED_SIZE_DECIMAL,
38            _ => len >= T::FORMATTED_SIZE,
39        },
40        "Buffer is too small: may overwrite buffer, panicking!"
41    );
42}
43
44/// Assertion the buffer has sufficient room for the output.
45#[inline(always)]
46#[cfg(all(not(feature = "power-of-two"), feature = "write"))]
47pub fn assert_buffer<T: FormattedSize>(_: u32, len: usize) {
48    assert!(
49        len >= T::FORMATTED_SIZE_DECIMAL,
50        "Buffer is too small: may overwrite buffer, panicking!"
51    );
52}