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#[cfg(all(feature = "force-static", feature = "force-dynamic"))]
compile_error!("dirty_static: Cannot enable both the force-static and force-dynamic features.");
pub use internal::DirtyStatic;
#[cfg(any(
feature = "force-dynamic",
all(not(feature = "force-static"), debug_assertions)
))]
mod internal {
use std::cell::UnsafeCell;
use std::ops::Deref;
pub struct DirtyStatic<T>(UnsafeCell<T>);
unsafe impl<T> Sync for DirtyStatic<T> where T: Sync {}
impl<T> Deref for DirtyStatic<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
let ptr = self.0.get();
unsafe { &*ptr }
}
}
impl<T> DirtyStatic<T> {
pub const fn new(t: T) -> Self {
DirtyStatic(UnsafeCell::new(t))
}
pub unsafe fn replace(&self, t: T) {
let ptr = self.0.get();
*ptr = t
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn create_value() {
let text = "Hello".to_string();
let c = DirtyStatic::new(text);
assert_eq!(&*c, "Hello");
}
#[test]
fn refresh_value() {
let text = "Hello".to_string();
let c = DirtyStatic::new(text);
unsafe { c.replace("Replacement value".to_string()) };
assert_eq!(&*c, "Replacement value");
}
}
}
#[cfg(any(
feature = "force-static",
all(not(feature = "force-dynamic"), not(debug_assertions))
))]
mod internal {
use std::ops::Deref;
pub struct DirtyStatic<T>(T);
impl<T> Deref for DirtyStatic<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<T> DirtyStatic<T> {
pub const fn new(t: T) -> Self {
DirtyStatic(t)
}
pub unsafe fn replace(&self, _t: T) {
eprintln!("WARNING: Can't replace in release mode!");
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn create_value() {
let text = "Hello".to_string();
let c = DirtyStatic::new(text);
assert_eq!(&*c, "Hello");
}
#[test]
fn refresh_value_does_nothing() {
let text = "Hello".to_string();
let c = DirtyStatic::new(text);
unsafe { c.replace("Replacement value".to_string()) };
assert_eq!(&*c, "Hello");
}
}
}
#[cfg(test)]
mod feature_tests {
use super::DirtyStatic;
fn _assert_static() {
let c = DirtyStatic::new(10);
unsafe { c.replace(20) };
assert_eq!(*c, 10);
}
fn _assert_dynamic() {
let c = DirtyStatic::new(10);
unsafe { c.replace(20) };
assert_eq!(*c, 20);
}
#[test]
#[cfg(all(
debug_assertions,
not(any(feature = "force-static", feature = "force-dynamic"))
))]
fn feature_test() {
_assert_dynamic();
}
#[test]
#[cfg(all(
not(debug_assertions),
not(any(feature = "force-static", feature = "force-dynamic"))
))]
fn feature_test() {
_assert_static();
}
#[test]
#[cfg(all(debug_assertions, feature = "force-static"))]
fn feature_test() {
_assert_static();
}
#[test]
#[cfg(all(debug_assertions, feature = "force-dynamic"))]
fn feature_test() {
_assert_dynamic();
}
#[test]
#[cfg(all(not(debug_assertions), feature = "force-static"))]
fn feature_test() {
_assert_static();
}
#[test]
#[cfg(all(not(debug_assertions), feature = "force-dynamic"))]
fn feature_test() {
_assert_dynamic();
}
}