Add str.as_str() for easy dereferencing of Box · qinheping/verify-rust-std@81c4805 (original) (raw)

3 files changed

lines changed

Original file line number	Diff line number	Diff line change
@@ -93,6 +93,7 @@
93	93	// tidy-alphabetical-start
94	94	#![cfg_attr(not(no_global_oom_handling), feature(const_alloc_error))]
95	95	#![cfg_attr(not(no_global_oom_handling), feature(const_btree_len))]
	96	+#![cfg_attr(test, feature(str_as_str))]
96	97	#![feature(alloc_layout_extra)]
97	98	#![feature(allocator_api)]
98	99	#![feature(array_chunks)]

Original file line number	Diff line number	Diff line change
@@ -448,7 +448,11 @@ fn test_from_box_str() {
448	448	use std:🧵:String;
449	449
450	450	let s = String::from("foo").into_boxed_str();
	451	+assert_eq!((&&&s).as_str(), "foo");
	452	+
451	453	let r: Rc<str> = Rc::from(s);
	454	+assert_eq!((&r).as_str(), "foo");
	455	+assert_eq!(r.as_str(), "foo");
452	456
453	457	assert_eq!(&r[..], "foo");
454	458	}

Original file line number	Diff line number	Diff line change
@@ -2737,6 +2737,17 @@ impl str {
2737	2737	pub fn substr_range(&self, substr: &str) -> Option<Range<usize>> {
2738	2738	self.as_bytes().subslice_range(substr.as_bytes())
2739	2739	}
	2740	+
	2741	+/// Returns the same string as a string slice `&str`.
	2742	+ ///
	2743	+ /// This method is redundant when used directly on `&str`, but
	2744	+ /// it helps dereferencing other string-like types to string slices,
	2745	+ /// for example references to `Box` or `Arc`.
	2746	+ #[inline]
	2747	+#[unstable(feature = "str_as_str", issue = "130366")]
	2748	+pub fn as_str(&self) -> &str {
	2749	+self
	2750	+}
2740	2751	}
2741	2752
2742	2753	#[stable(feature = "rust1", since = "1.0.0")]