8d2daacb18
fixes #6524. I had to make an additional change not mentioned in the ticket - adding the `#[feature]` to enable deriving custom traits but I assume that's expected at this time. Source-Repo: https://github.com/servo/servo Source-Revision: bbb39082e0f640400546d2084a450a8675820a82
43 lines
1.0 KiB
Rust
43 lines
1.0 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! The `Finite<T>` struct.
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use core::nonzero::Zeroable;
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use num::Float;
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use std::ops::Deref;
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/// Encapsulates the IDL restricted float type.
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#[derive(JSTraceable,Clone,Eq,PartialEq)]
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pub struct Finite<T: Float>(T);
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unsafe impl<T: Float> Zeroable for Finite<T> {}
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impl<T: Float> Finite<T> {
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/// Create a new `Finite<T: Float>` safely.
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pub fn new(value: T) -> Option<Finite<T>> {
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if value.is_finite() {
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Some(Finite(value))
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} else {
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None
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}
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}
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/// Create a new `Finite<T: Float>`.
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#[inline]
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pub fn wrap(value: T) -> Finite<T> {
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assert!(value.is_finite(), "Finite<T> doesn't encapsulate unrestricted value.");
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Finite(value)
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}
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}
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impl<T: Float> Deref for Finite<T> {
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type Target = T;
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fn deref(&self) -> &T {
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let &Finite(ref value) = self;
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value
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}
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}
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