Assume has_to_int_unchecked

Author: cuviper

build.rs

@@ -3,11 +3,6 @@ use std::env;
 fn main() {
     let ac = autocfg::new();
 
-    ac.emit_expression_cfg(
-        "unsafe { 1f64.to_int_unchecked::<i32>() }",
-        "has_to_int_unchecked",
-    );
-
     ac.emit_expression_cfg("1u32.reverse_bits()", "has_reverse_bits");
     ac.emit_expression_cfg("1u32.trailing_ones()", "has_leading_trailing_ones");
     ac.emit_expression_cfg("1u32.div_euclid(1u32)", "has_div_euclid");

src/cast.rs

@@ -277,7 +277,6 @@ macro_rules! impl_to_primitive_float_to_float {
     )*}
 }
 
-#[cfg(has_to_int_unchecked)]
 macro_rules! float_to_int_unchecked {
     // SAFETY: Must not be NaN or infinite; must be representable as the integer after truncating.
     // We already checked that the float is in the exclusive range `(MIN-1, MAX+1)`.
@@ -286,13 +285,6 @@ macro_rules! float_to_int_unchecked {
     };
 }
 
-#[cfg(not(has_to_int_unchecked))]
-macro_rules! float_to_int_unchecked {
-    ($float:expr => $int:ty) => {
-        $float as $int
-    };
-}
-
 macro_rules! impl_to_primitive_float_to_signed_int {
     ($f:ident : $( $(#[$cfg:meta])* fn $method:ident -> $i:ident ; )*) => {$(
         #[inline]