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See https://github.com/thepowersgang/mrustc/archive/v0.8.0.tar.gz
--- rustc-1.19.0-src-orig/src/libcore/intrinsics.rs
+++ rustc-1.19.0-src/src/libcore/intrinsics.rs
@@ -678,5 +678,9 @@
pub fn min_align_of_val<T: ?Sized>(_: &T) -> usize;
+ /// Obtain the length of a slice pointer
+ #[cfg(rust_compiler="mrustc")]
+ pub fn mrustc_slice_len<T>(pointer: *const [T]) -> usize;
+
/// Gets a static string slice containing the name of a type.
pub fn type_name<T: ?Sized>() -> &'static str;
--- rustc-1.19.0-src-orig/src/libcore/slice/mod.rs
+++ rustc-1.19.0-src/src/libcore/slice/mod.rs
@@ -413,6 +413,8 @@
#[inline]
fn len(&self) -> usize {
- unsafe {
- mem::transmute::<&[T], Repr<T>>(self).len
- }
+ #[cfg(not(rust_compiler="mrustc"))]
+ let rv = unsafe { mem::transmute::<&[T], Repr<T>>(self).len };
+ #[cfg(rust_compiler="mrustc")]
+ let rv = unsafe { ::intrinsics::mrustc_slice_len(self) };
+ rv
}
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