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Auto merge of #82058 - gilescope:to_digit_speedup, r=lcnr 

no need to check assertion on fast path as will always hold.

V small change. Easy to review though!
This commit is contained in:
bors 2021-02-16 08:38:11 +00:00
parent 090dac0c38 b70428b9fb
commit f1c47c79fe
1 changed files with 2 additions and 2 deletions
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4
library/core/src/char/methods.rs
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@ -330,8 +330,6 @@ impl char {
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
pub fn to_digit(self, radix: u32) -> Option<u32> {
assert!(radix <= 36, "to_digit: radix is too high (maximum 36)");
// the code is split up here to improve execution speed for cases where
// the `radix` is constant and 10 or smaller
let val = if radix <= 10 {
@ -340,6 +338,8 @@ impl char {
_ => return None,
}
} else {
assert!(radix <= 36, "to_digit: radix is too high (maximum 36)");
match self {
'0'..='9' => self as u32 - '0' as u32,
'a'..='z' => self as u32 - 'a' as u32 + 10,