added build-script

Cargo.lock

@@ -300,12 +300,14 @@ dependencies = [
 name = "lolicron"
 version = "0.1.0"
 dependencies = [
+ "cfg-if",
  "chrono",
  "futures",
  "lazy_static",
  "notify",
  "once_cell",
  "recolored",
+ "rustc_version",
  "sexp",
  "tokio",
 ]
@@ -504,6 +506,15 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "same-file"
 version = "1.0.6"
@@ -513,6 +524,21 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
 [[package]]
 name = "sexp"
 version = "1.1.4"

Cargo.toml

@@ -21,3 +21,7 @@ once_cell = "1.4"
 lazy_static = "1.4"
 recolored = "1.9.3"
 chrono = "0.4"
+cfg-if = "0.1"
+
+[build-dependencies]
+rustc_version = "0.2"

build.rs

@@ -0,0 +1,24 @@
+
+extern crate rustc_version;
+use rustc_version::{version, version_meta, Channel};
+
+fn main() {
+    // Assert we haven't travelled back in time
+    assert!(version().unwrap().major >= 1);
+
+    // Set cfg flags depending on release channel
+    match version_meta().unwrap().channel {
+        Channel::Stable => {
+            println!("cargo:rustc-cfg=stable");
+        }
+        Channel::Beta => {
+            println!("cargo:rustc-cfg=beta");
+        }
+        Channel::Nightly => {
+            println!("cargo:rustc-cfg=nightly");
+        }
+        Channel::Dev => {
+            println!("cargo:rustc-cfg=dev");
+        }
+    }
+}

src/interval.rs

@@ -25,6 +25,7 @@ pub enum Unit
 impl Unit
 {
     /// Multiplier to get to miliseconds
+
     #[inline]
     #[cfg(nightly)]
     const fn multiplier(&self) -> u64 {

src/live.rs

@@ -118,10 +118,10 @@ impl Hook {
 
     /// Try to dispatch on one of many paths
     pub async fn try_dispatch_many<T,P>(&self, paths: T, event: &Event) -> Result<bool, SendTimeoutError<Event>>
-    where T: AsRef<[P]>,
+    where T: IntoIterator<Item=P>,
 	  P: AsRef<Path>
     {
-	for path in paths.as_ref().iter() {
+	for path in paths.into_iter() {
 	    if self.path == path.as_ref() {
 		self.dispatch(event.to_owned()).await?;
 		return Ok(true);

src/main.rs

@@ -1,6 +1,6 @@
-#![cfg_attr(nightly, int_error_matching)]
+#![cfg_attr(nightly, feature(int_error_matching))]
-#![cfg_attr(nightly, const_fn)]
+#![cfg_attr(nightly, feature(const_fn))]
-
+#![cfg_attr(nightly, feature(maybe_uninit_ref))]
 
 #![allow(dead_code)]
 

src/util.rs

@@ -1,15 +1,29 @@
+#[allow(unused_imports)]
 use std::{
     ops::{
 	Drop,
 	Deref,
 	DerefMut,
     },
-    mem::replace,
+    mem::{
+	replace,
+	MaybeUninit,
+    },
     fmt,
 };
+use cfg_if::cfg_if;
+
+
+#[cfg(not(debug_assertions))]
+type OptFn<T,F> = MaybeUninit<(T,F)>;
+#[cfg(debug_assertions)]
+type OptFn<T,F> = Option<(T,F)>;
 
 /// Allow for running function on drop, to support moving out of a larger structure.
-pub struct PhantomDrop<T,F>(Option<(T,F)>)
+///
+/// # Notes
+/// This type has a safe ABI with runtime checks when compiled with `debug_assertions`, without them an unsafe but lower cost ABI is preferred.
+pub struct PhantomDrop<T,F>(OptFn<T,F>)
 where F: FnOnce(T);
 
 
@@ -27,9 +41,20 @@ impl<T,F> Drop for PhantomDrop<T,F>
 where F:FnOnce(T)
 {
     fn drop(&mut self) {
+	cfg_if! {
+	    if #[cfg(debug_assertions)] {
 		if let Some((value, func)) = replace(&mut self.0, None)
 		{
 		    func(value);
+		} else {
+		    panic!("Double drop?")
+		}
+	    } else {
+		let (value, func) = unsafe {
+		    (&mut self.0 as *mut OptFn<T,F>).read().assume_init()
+		};
+		func(value);
+	    }
 	}
     }
 }
@@ -42,14 +67,56 @@ where F:FnOnce(T)
     #[cfg(nightly)]
     pub const fn new(value: T, func: F) -> Self
     {
+	cfg_if! {
+	    if #[cfg(debug_assertions)] {
 		Self(Some((value,func)))
+	    } else {
+		Self(MaybeUninit::new((value,func)))
+	    }
+	}
     }
 
     /// Create a new `PhantomDrop` with a drop closure and a value.
     #[cfg(not(nightly))]
     pub fn new(value: T, func: F) -> Self
     {	    
+	cfg_if! {
+	    if #[cfg(debug_assertions)] {
 		Self(Some((value,func)))
+	    } else {
+		Self(MaybeUninit::new((value,func)))
+	    }
+	}
+    }
+
+    #[cfg(not(debug_assertions))]
+    #[inline]
+    fn get_ref<'a>(&'a self) -> &'a (T, F)
+    {
+	unsafe {
+	    cfg_if! {
+		if #[cfg(nightly)] {
+		    self.0.get_ref()
+		} else {
+		    std::mem::transmute::<_,&'a T>(self.0.as_ptr())
+		}
+	    }
+	}
+    }
+    
+    #[cfg(not(debug_assertions))]
+    #[inline]
+    fn get_mut<'a>(&'a mut self) -> &'a mut (T, F)
+    {
+	unsafe {
+	    cfg_if! {
+		if #[cfg(nightly)] {
+		    self.0.get_mut()
+		} else {
+		    std::mem::transmute::<_,&'a T>(self.0.as_mut_ptr())
+		}
+	    }
+	}
     }
 }
 
@@ -60,12 +127,19 @@ where F:FnOnce(T)
     type Target = T;
     fn deref(&self) -> &Self::Target
     {
+	cfg_if! {
+	    if #[cfg(debug_assertions)] {
 		if let Some((t, _)) = &self.0
 		{
 		    t
 		} else {
 		    panic!("Double drop?")
 		}
+	    } else {
+		let (t, _) = self.get_ref();
+		t
+	    }
+	}
     }
 }
 
@@ -75,11 +149,19 @@ where F:FnOnce(T)
 {
     fn deref_mut(&mut self) -> &mut <Self as Deref>::Target
     {
+	cfg_if! {
+	    if #[cfg(debug_assertions)] {
 		if let Some((t, _)) = &mut self.0
 		{
 		    t
 		} else {
 		    panic!("Double drop?")
 		}
+	    } else {
+		let (t, _) = self.get_mut();
+		t
+	    }
+	}
+	
     }
 }