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#[cfg(feature = "arc")]
pub(crate) type DefaultStr = crate::backend::ArcStr;
#[cfg(not(feature = "arc"))]
pub(crate) type DefaultStr = crate::backend::BoxedStr;
/// Fast allocations, O(n) clones
pub type BoxedStr = Box<str>;
static_assertions::assert_eq_size!(DefaultStr, BoxedStr);
/// Cross-thread, O(1) clones
pub type ArcStr = std::sync::Arc<str>;
static_assertions::assert_eq_size!(DefaultStr, ArcStr);
/// O(1) clones
pub type RcStr = std::rc::Rc<str>;
static_assertions::assert_eq_size!(DefaultStr, RcStr);
/// Abstract over different type of heap-allocated strings
pub trait HeapStr: std::fmt::Debug + Clone + private::Sealed {
fn from_str(other: &str) -> Self;
fn from_string(other: String) -> Self;
fn from_boxed_str(other: BoxedStr) -> Self;
fn as_str(&self) -> &str;
}
impl HeapStr for BoxedStr {
#[inline]
fn from_str(other: &str) -> Self {
other.into()
}
#[inline]
fn from_string(other: String) -> Self {
other.into_boxed_str()
}
#[inline]
fn from_boxed_str(other: BoxedStr) -> Self {
other
}
#[inline]
fn as_str(&self) -> &str {
self
}
}
impl HeapStr for ArcStr {
#[inline]
fn from_str(other: &str) -> Self {
other.into()
}
#[inline]
fn from_string(other: String) -> Self {
other.into_boxed_str().into()
}
#[inline]
fn from_boxed_str(other: BoxedStr) -> Self {
other.into()
}
#[inline]
fn as_str(&self) -> &str {
self
}
}
impl HeapStr for RcStr {
#[inline]
fn from_str(other: &str) -> Self {
other.into()
}
#[inline]
fn from_string(other: String) -> Self {
other.into_boxed_str().into()
}
#[inline]
fn from_boxed_str(other: BoxedStr) -> Self {
other.into()
}
#[inline]
fn as_str(&self) -> &str {
self
}
}
pub(crate) mod private {
pub trait Sealed {}
impl Sealed for super::BoxedStr {}
impl Sealed for super::ArcStr {}
impl Sealed for super::RcStr {}
}
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