From 9f9cad1c899d41409bef16571ca37885b5b9af5f Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Thu, 24 Apr 2025 19:35:37 -0700
Subject: [PATCH] Resolve unnecessary_transmutes warning in nightly-2025-04-25

    warning: unnecessary transmute
       --> src/diyfp.rs:141:37
        |
    141 |                   let u: $mask_type = mem::transmute(d);
        |                                       ^^^^^^^^^^^^^^^^^ help: replace this with: `f32::to_bits(d)`
        |
       ::: src/lib.rs:197:9
        |
    197 | /         dtoa! {
    198 | |             floating_type: f32,
    199 | |             significand_type: u32,
    200 | |             exponent_type: i32,
    ...   |
    211 | |             min_power: (-36),
    212 | |         };
        | |_________- in this macro invocation
        |
        = note: `#[warn(unnecessary_transmutes)]` on by default
        = note: this warning originates in the macro `diyfp` which comes from the expansion of the macro `dtoa` (in Nightly builds, run with -Z macro-backtrace for more info)

    warning: unnecessary transmute
       --> src/diyfp.rs:141:37
        |
    141 |                   let u: $mask_type = mem::transmute(d);
        |                                       ^^^^^^^^^^^^^^^^^ help: replace this with: `f64::to_bits(d)`
        |
       ::: src/lib.rs:243:9
        |
    243 | /         dtoa! {
    244 | |             floating_type: f64,
    245 | |             significand_type: u64,
    246 | |             exponent_type: isize,
    ...   |
    257 | |             min_power: (-348),
    258 | |         };
        | |_________- in this macro invocation
        |
        = note: this warning originates in the macro `diyfp` which comes from the expansion of the macro `dtoa` (in Nightly builds, run with -Z macro-backtrace for more info)
---
 src/diyfp.rs | 2 +-
 src/lib.rs   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/diyfp.rs b/src/diyfp.rs
index ee2e50a..cbda2a9 100644
--- a/src/diyfp.rs
+++ b/src/diyfp.rs
@@ -138,7 +138,7 @@ macro_rules! diyfp {
             */
             #[cfg_attr(feature = "no-panic", no_panic)]
             unsafe fn from(d: $fty) -> Self {
-                let u: $mask_type = mem::transmute(d);
+                let u: $mask_type = <$fty>::to_bits(d);
 
                 let biased_e = ((u & $exponent_mask) >> $significand_size) as $expty;
                 let significand = u & $significand_mask;
diff --git a/src/lib.rs b/src/lib.rs
index 41e3b1b..5c2c0ec 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -59,7 +59,7 @@ mod diyfp;
 #[macro_use]
 mod dtoa;
 
-use core::mem::{self, MaybeUninit};
+use core::mem::MaybeUninit;
 use core::slice;
 use core::str;
 #[cfg(feature = "no-panic")]