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Rename Yielder::generate to Yielder::suspend.

This makes more sense, because "generate" implies *running*
a generator, not *returning* from a generator. That name was
a vestige of the time when libfringe only really provided a .next()
implementation, which made marginally more sense together with
.generate(), but it doesn't anymore when we have .resume().
This commit is contained in:
whitequark 2016-08-30 10:37:15 +00:00 committed by edef
parent ef0225cacb
commit 4b32c18f70
5 changed files with 15 additions and 15 deletions

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@ -14,7 +14,7 @@ use fringe::{OsStack, Generator};
fn generate(b: &mut test::Bencher) { fn generate(b: &mut test::Bencher) {
let stack = OsStack::new(0).unwrap(); let stack = OsStack::new(0).unwrap();
let mut identity = Generator::new(stack, move |yielder, mut input| { let mut identity = Generator::new(stack, move |yielder, mut input| {
loop { input = yielder.generate(input) } loop { input = yielder.suspend(input) }
}); });
b.iter(|| test::black_box(identity.resume(test::black_box(0)))); b.iter(|| test::black_box(identity.resume(test::black_box(0))));

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@ -30,9 +30,9 @@ pub enum State {
/// a value each time. /// a value each time.
/// ///
/// The first time `resume(input0)` is called, the function is called as `f(yielder, input0)`. /// The first time `resume(input0)` is called, the function is called as `f(yielder, input0)`.
/// It runs until it suspends its execution through `yielder.generate(output0)`, after which /// It runs until it suspends its execution through `yielder.suspend(output0)`, after which
/// `resume(input0)` returns `output0`. The function can be resumed again using `resume(input1)`, /// `resume(input0)` returns `output0`. The function can be resumed again using `resume(input1)`,
/// after which `yielder.generate(output0)` returns `input1`, and so on. Once the function returns, /// after which `yielder.suspend(output0)` returns `input1`, and so on. Once the function returns,
/// the `resume()` call will return `None`, and it will return `None` every time it is called /// the `resume()` call will return `None`, and it will return `None` every time it is called
/// after that. /// after that.
/// ///
@ -56,7 +56,7 @@ pub enum State {
/// let mut add_one = Generator::new(stack, move |yielder, mut input| { /// let mut add_one = Generator::new(stack, move |yielder, mut input| {
/// loop { /// loop {
/// if input == 0 { break } /// if input == 0 { break }
/// input = yielder.generate(input + 1) /// input = yielder.suspend(input + 1)
/// } /// }
/// }); /// });
/// println!("{:?}", add_one.resume(2)); // prints Some(3) /// println!("{:?}", add_one.resume(2)); // prints Some(3)
@ -71,7 +71,7 @@ pub enum State {
/// ///
/// let stack = OsStack::new(0).unwrap(); /// let stack = OsStack::new(0).unwrap();
/// let mut nat = Generator::new(stack, move |yielder, ()| { /// let mut nat = Generator::new(stack, move |yielder, ()| {
/// for i in 1.. { yielder.generate(i) } /// for i in 1.. { yielder.suspend(i) }
/// }); /// });
/// println!("{:?}", nat.next()); // prints Some(0) /// println!("{:?}", nat.next()); // prints Some(0)
/// println!("{:?}", nat.next()); // prints Some(1) /// println!("{:?}", nat.next()); // prints Some(1)
@ -106,13 +106,13 @@ impl<Input, Output, Stack> Generator<Input, Output, Stack>
// Retrieve our environment from the callee and return control to it. // Retrieve our environment from the callee and return control to it.
let (mut yielder, f) = ptr::read(env as *mut (Yielder<Input, Output, Stack>, F)); let (mut yielder, f) = ptr::read(env as *mut (Yielder<Input, Output, Stack>, F));
let data = Context::swap(yielder.context, yielder.context, 0); let data = Context::swap(yielder.context, yielder.context, 0);
// See the second half of Yielder::generate_bare. // See the second half of Yielder::suspend_bare.
let (new_context, input) = ptr::read(data as *mut (*mut Context<Stack>, Input)); let (new_context, input) = ptr::read(data as *mut (*mut Context<Stack>, Input));
yielder.context = new_context as *mut Context<Stack>; yielder.context = new_context as *mut Context<Stack>;
// Run the body of the generator. // Run the body of the generator.
f(&mut yielder, input); f(&mut yielder, input);
// Past this point, the generator has dropped everything it has held. // Past this point, the generator has dropped everything it has held.
loop { yielder.generate_bare(None); } loop { yielder.suspend_bare(None); }
} }
let mut generator = Generator { let mut generator = Generator {
@ -195,7 +195,7 @@ impl<Input, Output, Stack> Yielder<Input, Output, Stack>
} }
#[inline(always)] #[inline(always)]
fn generate_bare(&mut self, mut val: Option<Output>) -> Input { fn suspend_bare(&mut self, mut val: Option<Output>) -> Input {
unsafe { unsafe {
let data = Context::swap(self.context, self.context, let data = Context::swap(self.context, self.context,
&mut val as *mut Option<Output> as usize); &mut val as *mut Option<Output> as usize);
@ -204,7 +204,7 @@ impl<Input, Output, Stack> Yielder<Input, Output, Stack>
// This changes the address of the context. // This changes the address of the context.
// Thus, we update it after each swap. // Thus, we update it after each swap.
self.context = new_context; self.context = new_context;
// However, between this point and the next time we enter generate_bare // However, between this point and the next time we enter suspend_bare
// the generator cannot be moved, as a &mut Generator is necessary // the generator cannot be moved, as a &mut Generator is necessary
// to resume the generator function. // to resume the generator function.
input input
@ -214,8 +214,8 @@ impl<Input, Output, Stack> Yielder<Input, Output, Stack>
/// Suspends the generator and returns `Some(item)` from the `resume()` /// Suspends the generator and returns `Some(item)` from the `resume()`
/// invocation that resumed the generator. /// invocation that resumed the generator.
#[inline(always)] #[inline(always)]
pub fn generate(&mut self, item: Output) -> Input { pub fn suspend(&mut self, item: Output) -> Input {
self.generate_bare(Some(item)) self.suspend_bare(Some(item))
} }
} }

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@ -24,7 +24,7 @@ extern {
fn fpe() { fn fpe() {
let stack = OsStack::new(0).unwrap(); let stack = OsStack::new(0).unwrap();
let mut gen = Generator::new(stack, move |yielder, ()| { let mut gen = Generator::new(stack, move |yielder, ()| {
yielder.generate(1.0 / black_box(0.0)); yielder.suspend(1.0 / black_box(0.0));
}); });
unsafe { feenableexcept(FE_DIVBYZERO); } unsafe { feenableexcept(FE_DIVBYZERO); }

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@ -14,7 +14,7 @@ fn new_add_one() -> Generator<i32, i32, OsStack> {
Generator::new(stack, move |yielder, mut input| { Generator::new(stack, move |yielder, mut input| {
loop { loop {
if input == 0 { break } if input == 0 { break }
input = yielder.generate(input + 1) input = yielder.suspend(input + 1)
} }
}) })
} }
@ -71,7 +71,7 @@ fn with_slice_stack() {
Generator::unsafe_new(stack, move |yielder, mut input| { Generator::unsafe_new(stack, move |yielder, mut input| {
loop { loop {
if input == 0 { break } if input == 0 { break }
input = yielder.generate(input + 1) input = yielder.suspend(input + 1)
} }
}) })
}; };

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@ -13,7 +13,7 @@ use fringe::generator::Generator;
fn producer() { fn producer() {
let stack = OsStack::new(0).unwrap(); let stack = OsStack::new(0).unwrap();
let mut gen = Generator::new(stack, move |yielder, ()| { let mut gen = Generator::new(stack, move |yielder, ()| {
for i in 0.. { yielder.generate(i) } for i in 0.. { yielder.suspend(i) }
}); });
assert_eq!(gen.next(), Some(0)); assert_eq!(gen.next(), Some(0));
assert_eq!(gen.next(), Some(1)); assert_eq!(gen.next(), Some(1));