58 lines
1.5 KiB
Rust
58 lines
1.5 KiB
Rust
// skip-filecheck
|
|
// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
|
|
|
|
#![feature(flt2dec)]
|
|
|
|
extern crate core;
|
|
|
|
use core::num::flt2dec;
|
|
use std::fmt::{Formatter, Result};
|
|
|
|
// EMIT_MIR funky_arms.float_to_exponential_common.GVN.diff
|
|
pub fn float_to_exponential_common<T>(fmt: &mut Formatter<'_>, num: &T, upper: bool) -> Result
|
|
where
|
|
T: flt2dec::DecodableFloat,
|
|
{
|
|
let force_sign = fmt.sign_plus();
|
|
// A bug in const propagation (never reached master, but during dev of a PR) caused the
|
|
// `sign = Minus` assignment to get propagated into all future reads of `sign`. This is
|
|
// wrong because `sign` could also have `MinusPlus` value.
|
|
let sign = match force_sign {
|
|
false => flt2dec::Sign::Minus,
|
|
true => flt2dec::Sign::MinusPlus,
|
|
};
|
|
|
|
if let Some(precision) = fmt.precision() {
|
|
// 1 integral digit + `precision` fractional digits = `precision + 1` total digits
|
|
float_to_exponential_common_exact(fmt, num, sign, precision as u32 + 1, upper)
|
|
} else {
|
|
float_to_exponential_common_shortest(fmt, num, sign, upper)
|
|
}
|
|
}
|
|
#[inline(never)]
|
|
fn float_to_exponential_common_exact<T>(
|
|
fmt: &mut Formatter<'_>,
|
|
num: &T,
|
|
sign: flt2dec::Sign,
|
|
precision: u32,
|
|
upper: bool,
|
|
) -> Result
|
|
where
|
|
T: flt2dec::DecodableFloat,
|
|
{
|
|
unimplemented!()
|
|
}
|
|
|
|
#[inline(never)]
|
|
fn float_to_exponential_common_shortest<T>(
|
|
fmt: &mut Formatter<'_>,
|
|
num: &T,
|
|
sign: flt2dec::Sign,
|
|
upper: bool,
|
|
) -> Result
|
|
where
|
|
T: flt2dec::DecodableFloat,
|
|
{
|
|
unimplemented!()
|
|
}
|