summaryrefslogtreecommitdiffstats
path: root/vendor/lazycell
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/lazycell')
-rw-r--r--vendor/lazycell/.cargo-checksum.json1
-rw-r--r--vendor/lazycell/CHANGELOG.md197
-rw-r--r--vendor/lazycell/Cargo.toml30
-rw-r--r--vendor/lazycell/LICENSE-APACHE201
-rw-r--r--vendor/lazycell/LICENSE-MIT26
-rw-r--r--vendor/lazycell/README.md73
-rw-r--r--vendor/lazycell/debian/patches/drop-clippy.diff19
-rw-r--r--vendor/lazycell/debian/patches/series1
-rw-r--r--vendor/lazycell/src/lib.rs680
-rw-r--r--vendor/lazycell/src/serde_impl.rs86
10 files changed, 1314 insertions, 0 deletions
diff --git a/vendor/lazycell/.cargo-checksum.json b/vendor/lazycell/.cargo-checksum.json
new file mode 100644
index 0000000..02e91fb
--- /dev/null
+++ b/vendor/lazycell/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{},"package":"830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"} \ No newline at end of file
diff --git a/vendor/lazycell/CHANGELOG.md b/vendor/lazycell/CHANGELOG.md
new file mode 100644
index 0000000..1ac4a6e
--- /dev/null
+++ b/vendor/lazycell/CHANGELOG.md
@@ -0,0 +1,197 @@
+<a name="v1.3.0"></a>
+## v1.3.0 (2020-08-12)
+
+
+#### Bug Fixes
+
+* Add custom `impl Default` to support non-Default-able `<T>` types ([b49f4eab](https://github.com/indiv0/lazycell/commit/b49f4eabec49c0a5146ef01017c2506a3c357180))
+* **lazycell:** Fix unsound aliasing in `LazyCell::fill` ([e789ac1a](https://github.com/indiv0/lazycell/commit/e789ac1a99010ad79c2d09c761fec6d67053647d), closes [#98](https://github.com/indiv0/lazycell/issues/98))
+
+#### Features
+
+* Implement serde support ([e728a0b6](https://github.com/indiv0/lazycell/commit/e728a0b680e607b793a81b5af7bf7f1d2c0eb5e5))
+
+#### Documentation
+
+* fix typo ([5f5ba9d5](https://github.com/indiv0/lazycell/commit/5f5ba9d5ac3364f8376c0c872c2e5094974385ba))
+
+
+
+<a name="v1.2.1"></a>
+## v1.2.1 (2018-12-03)
+
+
+#### Features
+
+* Implement Clone for LazyCell and AtomicLazyCell ([30fe4a8f](https://github.com/indiv0/lazycell/commit/30fe4a8f568059b3c78ed149a810962a676cb2b2))
+
+
+
+<a name="v1.2.0"></a>
+## v1.2.0 (2018-09-19)
+
+
+#### Features
+
+* add `LazyCell::replace` for infallible access ([a63ffb90](https://github.com/indiv0/lazycell/commit/a63ffb9040a5e0683a9bbf9d3d5ef589f2ca8b7c))
+
+
+
+<a name="v1.1.0"></a>
+## v1.1.0 (2018-09-10)
+
+
+#### Documentation
+
+* add note regarding LazyCell::borrow_mut ([9d634d1f](https://github.com/indiv0/lazycell/commit/9d634d1fd9a21b7aa075d407bedf9fe77ba8b79f))
+* describe mutability more consistently ([b8078029](https://github.com/indiv0/lazycell/commit/b80780294611e92efddcdd33a701b3049ab5c5eb), closes [#78](https://github.com/indiv0/lazycell/issues/78))
+
+#### Improvements
+
+* add NONE constant for an empty AtomicLazyCell ([31aff0da](https://github.com/indiv0/lazycell/commit/31aff0dacf824841c5f38ef4acf0aa71ec4c36eb), closes [#87](https://github.com/indiv0/lazycell/issues/87))
+* add `LazyCell::borrow_mut_with` and `LazyCell::try_borrow_mut_with` ([fdc6d268](https://github.com/indiv0/lazycell/commit/fdc6d268f0e9a6668768302f45fe2bb4aa9a7c34), closes [#79](https://github.com/indiv0/lazycell/issues/79), [#80](https://github.com/indiv0/lazycell/issues/80))
+
+
+
+<a name="v1.0.0"></a>
+## v1.0.0 (2018-06-06)
+
+
+#### Features
+
+* Add #![no_std] ([e59f6b55](https://github.com/indiv0/lazycell/commit/e59f6b5531e310d3df26b0eb40b1431937f38096))
+
+
+
+<a name="0.6.0"></a>
+## 0.6.0 (2017-11-25)
+
+
+#### Bug Fixes
+
+* fix soundness hole in borrow_with ([d1f46bef](https://github.com/indiv0/lazycell/commit/d1f46bef9d1397570aa9c3e87e18e0d16e6d1585))
+
+#### Features
+
+* add Default derives ([71bc5088](https://github.com/indiv0/lazycell/commit/71bc50880cd8e20002038197c9b890f5b76ad096))
+* add LazyCell::try_borrow_with ([bffa4028](https://github.com/indiv0/lazycell/commit/bffa402896670b5c78a9ec050d82a58ee98de6fb))
+* add LazyCell::borrow_mut method ([fd419dea](https://github.com/indiv0/lazycell/commit/fd419dea965ff1ad3853f26f37e8d107c6ca096c))
+
+#### Breaking Changes
+
+* add `T: Send` for `AtomicLazyCell` `Sync` impl ([668bb2fa](https://github.com/indiv0/lazycell/commit/668bb2fa974fd6707c4c7edad292c76a9017d74d), closes [#67](https://github.com/indiv0/lazycell/issues/67))
+
+#### Improvements
+
+* add `T: Send` for `AtomicLazyCell` `Sync` impl ([668bb2fa](https://github.com/indiv0/lazycell/commit/668bb2fa974fd6707c4c7edad292c76a9017d74d), closes [#67](https://github.com/indiv0/lazycell/issues/67))
+
+
+
+<a name="v0.5.1"></a>
+## v0.5.1 (2017-03-24)
+
+
+#### Documentation
+
+* fix missing backticks ([44bafaaf](https://github.com/indiv0/lazycell/commit/44bafaaf93a91641261f58ee38adadcd4af6458e))
+
+#### Improvements
+
+* derive `Debug` impls ([9da0a5a2](https://github.com/indiv0/lazycell/commit/9da0a5a2ffac1fef03ef02851c2c89d26d67d225))
+
+#### Features
+
+* Add get method for Copy types ([dc8f8209](https://github.com/indiv0/lazycell/commit/dc8f8209888b6eba6d18717eba6a22614629b997))
+
+
+
+<a name="v0.5.0"></a>
+## v0.5.0 (2016-12-08)
+
+
+#### Features
+
+* add borrow_with to LazyCell ([a15efa35](https://github.com/indiv0/lazycell/commit/a15efa359ea5a31a66ba57fc5b25f90c87b4b0dd))
+
+
+
+<a name="v0.4.0"></a>
+## (2016-08-17)
+
+
+#### Breaking Changes
+
+* **LazyCell:** return Err(value) on full cell ([68f3415d](https://github.com/indiv0/lazycell/commit/68f3415dd5d6a66ba047a133b7028ebe4f1c5070), breaks [#](https://github.com/indiv0/lazycell/issues/))
+
+#### Improvements
+
+* **LazyCell:** return Err(value) on full cell ([68f3415d](https://github.com/indiv0/lazycell/commit/68f3415dd5d6a66ba047a133b7028ebe4f1c5070), breaks [#](https://github.com/indiv0/lazycell/issues/))
+
+
+
+<a name="v0.3.0"></a>
+## (2016-08-16)
+
+
+#### Features
+
+* add AtomicLazyCell which is thread-safe ([85afbd36](https://github.com/indiv0/lazycell/commit/85afbd36d8a148e14cc53654b39ddb523980124d))
+
+#### Improvements
+
+* Use UnsafeCell instead of RefCell ([3347a8e9](https://github.com/indiv0/lazycell/commit/3347a8e97d2215a47e25c1e2fc953e8052ad8eb6))
+
+
+
+<a name="v0.2.1"></a>
+## (2016-04-18)
+
+
+#### Documentation
+
+* put types in between backticks ([607cf939](https://github.com/indiv0/lazycell/commit/607cf939b05e35001ba3070ec7a0b17b064e7be1))
+
+
+
+<a name="v0.2.0"></a>
+## v0.2.0 (2016-03-28)
+
+
+#### Features
+
+* **lazycell:**
+ * add tests for `LazyCell` struct ([38f1313d](https://github.com/indiv0/lazycell/commit/38f1313d98542ca8c98b424edfa9ba9c3975f99e), closes [#30](https://github.com/indiv0/lazycell/issues/30))
+ * remove unnecessary `Default` impl ([68c16d2d](https://github.com/indiv0/lazycell/commit/68c16d2df4e9d13d5298162c06edf918246fd758))
+
+#### Documentation
+
+* **CHANGELOG:** removed unnecessary sections ([1cc0555d](https://github.com/indiv0/lazycell/commit/1cc0555d875898a01b0832ff967aed6b40e720eb))
+* **README:** add link to documentation ([c8dc33f0](https://github.com/indiv0/lazycell/commit/c8dc33f01f2c0dc187f59ee53a2b73081053012b), closes [#13](https://github.com/indiv0/lazycell/issues/13))
+
+
+
+<a name="v0.1.0"></a>
+## v0.1.0 (2016-03-16)
+
+
+#### Features
+
+* **lib.rs:** implement Default trait for LazyCell ([150a6304](https://github.com/indiv0/LazyCell/commit/150a6304a230ee1de8424e49c447ec1b2d6578ce))
+
+
+
+<a name="v0.0.1"></a>
+## v0.0.1 (2016-03-16)
+
+
+#### Bug Fixes
+
+* **Cargo.toml:** loosen restrictions on Clippy version ([84dd8f96](https://github.com/indiv0/LazyCell/commit/84dd8f960000294f9dad47d776a41b98ed812981))
+
+#### Features
+
+* add initial implementation ([4b39764a](https://github.com/indiv0/LazyCell/commit/4b39764a575bcb701dbd8047b966f72720fd18a4))
+* add initial commit ([a80407a9](https://github.com/indiv0/LazyCell/commit/a80407a907ef7c9401f120104663172f6965521a))
+
+
+
diff --git a/vendor/lazycell/Cargo.toml b/vendor/lazycell/Cargo.toml
new file mode 100644
index 0000000..e4d6309
--- /dev/null
+++ b/vendor/lazycell/Cargo.toml
@@ -0,0 +1,30 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "lazycell"
+version = "1.3.0"
+authors = ["Alex Crichton <alex@alexcrichton.com>", "Nikita Pekin <contact@nikitapek.in>"]
+include = ["CHANGELOG.md", "Cargo.toml", "LICENSE-MIT", "LICENSE-APACHE", "README.md", "src/**/*.rs"]
+description = "A library providing a lazily filled Cell struct"
+documentation = "http://indiv0.github.io/lazycell/lazycell/"
+readme = "README.md"
+keywords = ["lazycell", "lazy", "cell", "library"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/indiv0/lazycell"
+
+[dependencies.serde]
+version = "^1"
+optional = true
+
+[features]
+nightly = []
diff --git a/vendor/lazycell/LICENSE-APACHE b/vendor/lazycell/LICENSE-APACHE
new file mode 100644
index 0000000..16fe87b
--- /dev/null
+++ b/vendor/lazycell/LICENSE-APACHE
@@ -0,0 +1,201 @@
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/vendor/lazycell/LICENSE-MIT b/vendor/lazycell/LICENSE-MIT
new file mode 100644
index 0000000..b4cbb4b
--- /dev/null
+++ b/vendor/lazycell/LICENSE-MIT
@@ -0,0 +1,26 @@
+Original work Copyright (c) 2014 The Rust Project Developers
+Modified work Copyright (c) 2016-2018 Nikita Pekin and lazycell contributors
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/vendor/lazycell/README.md b/vendor/lazycell/README.md
new file mode 100644
index 0000000..555fe39
--- /dev/null
+++ b/vendor/lazycell/README.md
@@ -0,0 +1,73 @@
+# lazycell
+
+<table>
+ <tr>
+ <td><strong>Linux</strong></td>
+ <td><a href="https://travis-ci.org/indiv0/lazycell" title="Travis Build Status"><img src="https://travis-ci.org/indiv0/lazycell.svg?branch=master" alt="travis-badge"></img></a></td>
+ </tr>
+ <tr>
+ <td colspan="2">
+ <a href="https://crates.io/crates/lazycell" title="Crates.io downloads"><img src="https://img.shields.io/crates/d/lazycell.svg" alt="cargo-downloads-badge"></img></a>
+ <a href="https://indiv0.github.io/lazycell/lazycell" title="API Docs"><img src="https://img.shields.io/badge/API-docs-blue.svg" alt="api-docs-badge"></img></a>
+ <a href="https://crates.io/crates/lazycell" title="Crates.io"><img src="https://img.shields.io/crates/v/lazycell.svg" alt="crates-io"></img></a>
+ <a href="#license" title="License: MIT/Apache-2.0"><img src="https://img.shields.io/crates/l/lazycell.svg" alt="license-badge"></img></a>
+ <a href="https://coveralls.io/github/indiv0/lazycell?branch=master" title="Coverage Status"><img src="https://coveralls.io/repos/github/indiv0/lazycell/badge.svg?branch=master" alt="coveralls-badge"></img></a>
+ </td>
+ </tr>
+</table>
+
+Rust library providing a lazily filled Cell.
+
+# Table of Contents
+
+* [Usage](#usage)
+* [Contributing](#contributing)
+* [Credits](#credits)
+* [License](#license)
+
+## Usage
+
+Add the following to your `Cargo.toml`:
+
+```toml
+[dependencies]
+lazycell = "1.3"
+```
+
+And in your `lib.rs` or `main.rs`:
+
+```rust
+extern crate lazycell;
+```
+
+See the [API docs][api-docs] for information on using the crate in your library.
+
+## Contributing
+
+Contributions are always welcome!
+If you have an idea for something to add (code, documentation, tests, examples,
+etc.) feel free to give it a shot.
+
+Please read [CONTRIBUTING.md][contributing] before you start contributing.
+
+## Credits
+
+The LazyCell library is based originally on work by The Rust Project Developers
+for the project [crates.io][crates-io-repo].
+
+The list of contributors to this project can be found at
+[CONTRIBUTORS.md][contributors].
+
+## License
+
+LazyCell is distributed under the terms of both the MIT license and the Apache
+License (Version 2.0).
+
+See [LICENSE-APACHE][license-apache], and [LICENSE-MIT][license-mit] for details.
+
+[api-docs]: https://indiv0.github.io/lazycell/lazycell
+[contributing]: https://github.com/indiv0/lazycell/blob/master/CONTRIBUTING.md "Contribution Guide"
+[contributors]: https://github.com/indiv0/lazycell/blob/master/CONTRIBUTORS.md "List of Contributors"
+[crates-io-repo]: https://github.com/rust-lang/crates.io "rust-lang/crates.io: Source code for crates.io"
+[license-apache]: https://github.com/indiv0/lazycell/blob/master/LICENSE-APACHE "Apache-2.0 License"
+[license-mit]: https://github.com/indiv0/lazycell/blob/master/LICENSE-MIT "MIT License"
diff --git a/vendor/lazycell/debian/patches/drop-clippy.diff b/vendor/lazycell/debian/patches/drop-clippy.diff
new file mode 100644
index 0000000..c948535
--- /dev/null
+++ b/vendor/lazycell/debian/patches/drop-clippy.diff
@@ -0,0 +1,19 @@
+Index: lazycell/Cargo.toml
+===================================================================
+--- lazycell.orig/Cargo.toml
++++ lazycell/Cargo.toml
+@@ -21,9 +21,6 @@ readme = "README.md"
+ keywords = ["lazycell", "lazy", "cell", "library"]
+ license = "MIT/Apache-2.0"
+ repository = "https://github.com/indiv0/lazycell"
+-[dependencies.clippy]
+-version = "0.0"
+-optional = true
+
+ [dependencies.serde]
+ version = "^1"
+@@ -31,4 +28,3 @@ optional = true
+
+ [features]
+ nightly = []
+-nightly-testing = ["clippy", "nightly"]
diff --git a/vendor/lazycell/debian/patches/series b/vendor/lazycell/debian/patches/series
new file mode 100644
index 0000000..c20675e
--- /dev/null
+++ b/vendor/lazycell/debian/patches/series
@@ -0,0 +1 @@
+drop-clippy.diff
diff --git a/vendor/lazycell/src/lib.rs b/vendor/lazycell/src/lib.rs
new file mode 100644
index 0000000..53bee07
--- /dev/null
+++ b/vendor/lazycell/src/lib.rs
@@ -0,0 +1,680 @@
+// Original work Copyright (c) 2014 The Rust Project Developers
+// Modified work Copyright (c) 2016-2020 Nikita Pekin and the lazycell contributors
+// See the README.md file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![cfg_attr(not(test), no_std)]
+
+#![deny(missing_docs)]
+#![cfg_attr(feature = "nightly", feature(plugin))]
+#![cfg_attr(feature = "clippy", plugin(clippy))]
+
+//! This crate provides a `LazyCell` struct which acts as a lazily filled
+//! `Cell`.
+//!
+//! With a `RefCell`, the inner contents cannot be borrowed for the lifetime of
+//! the entire object, but only of the borrows returned. A `LazyCell` is a
+//! variation on `RefCell` which allows borrows to be tied to the lifetime of
+//! the outer object.
+//!
+//! # Example
+//!
+//! The following example shows a quick example of the basic functionality of
+//! `LazyCell`.
+//!
+//! ```
+//! use lazycell::LazyCell;
+//!
+//! let lazycell = LazyCell::new();
+//!
+//! assert_eq!(lazycell.borrow(), None);
+//! assert!(!lazycell.filled());
+//! lazycell.fill(1).ok();
+//! assert!(lazycell.filled());
+//! assert_eq!(lazycell.borrow(), Some(&1));
+//! assert_eq!(lazycell.into_inner(), Some(1));
+//! ```
+//!
+//! `AtomicLazyCell` is a variant that uses an atomic variable to manage
+//! coordination in a thread-safe fashion. The limitation of an `AtomicLazyCell`
+//! is that after it is initialized, it can't be modified.
+
+
+#[cfg(not(test))]
+#[macro_use]
+extern crate core as std;
+#[cfg(feature = "serde")]
+extern crate serde;
+
+#[cfg(feature = "serde")]
+mod serde_impl;
+
+use std::cell::UnsafeCell;
+use std::mem;
+use std::sync::atomic::{AtomicUsize, Ordering};
+
+/// A lazily filled `Cell`, with mutable contents.
+///
+/// A `LazyCell` is completely frozen once filled, **unless** you have `&mut`
+/// access to it, in which case `LazyCell::borrow_mut` may be used to mutate the
+/// contents.
+#[derive(Debug)]
+pub struct LazyCell<T> {
+ inner: UnsafeCell<Option<T>>,
+}
+
+impl<T> LazyCell<T> {
+ /// Creates a new, empty, `LazyCell`.
+ pub fn new() -> LazyCell<T> {
+ LazyCell { inner: UnsafeCell::new(None) }
+ }
+
+ /// Put a value into this cell.
+ ///
+ /// This function will return `Err(value)` if the cell is already full.
+ pub fn fill(&self, value: T) -> Result<(), T> {
+ let slot = unsafe { &*self.inner.get() };
+ if slot.is_some() {
+ return Err(value);
+ }
+ let slot = unsafe { &mut *self.inner.get() };
+ *slot = Some(value);
+
+ Ok(())
+ }
+
+ /// Put a value into this cell.
+ ///
+ /// Note that this function is infallible but requires `&mut self`. By
+ /// requiring `&mut self` we're guaranteed that no active borrows to this
+ /// cell can exist so we can always fill in the value. This may not always
+ /// be usable, however, as `&mut self` may not be possible to borrow.
+ ///
+ /// # Return value
+ ///
+ /// This function returns the previous value, if any.
+ pub fn replace(&mut self, value: T) -> Option<T> {
+ mem::replace(unsafe { &mut *self.inner.get() }, Some(value))
+ }
+
+ /// Test whether this cell has been previously filled.
+ pub fn filled(&self) -> bool {
+ self.borrow().is_some()
+ }
+
+ /// Borrows the contents of this lazy cell for the duration of the cell
+ /// itself.
+ ///
+ /// This function will return `Some` if the cell has been previously
+ /// initialized, and `None` if it has not yet been initialized.
+ pub fn borrow(&self) -> Option<&T> {
+ unsafe { &*self.inner.get() }.as_ref()
+ }
+
+ /// Borrows the contents of this lazy cell mutably for the duration of the cell
+ /// itself.
+ ///
+ /// This function will return `Some` if the cell has been previously
+ /// initialized, and `None` if it has not yet been initialized.
+ pub fn borrow_mut(&mut self) -> Option<&mut T> {
+ unsafe { &mut *self.inner.get() }.as_mut()
+ }
+
+ /// Borrows the contents of this lazy cell for the duration of the cell
+ /// itself.
+ ///
+ /// If the cell has not yet been filled, the cell is first filled using the
+ /// function provided.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the cell becomes filled as a side effect of `f`.
+ pub fn borrow_with<F: FnOnce() -> T>(&self, f: F) -> &T {
+ if let Some(value) = self.borrow() {
+ return value;
+ }
+ let value = f();
+ if self.fill(value).is_err() {
+ panic!("borrow_with: cell was filled by closure")
+ }
+ self.borrow().unwrap()
+ }
+
+ /// Borrows the contents of this `LazyCell` mutably for the duration of the
+ /// cell itself.
+ ///
+ /// If the cell has not yet been filled, the cell is first filled using the
+ /// function provided.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the cell becomes filled as a side effect of `f`.
+ pub fn borrow_mut_with<F: FnOnce() -> T>(&mut self, f: F) -> &mut T {
+ if !self.filled() {
+ let value = f();
+ if self.fill(value).is_err() {
+ panic!("borrow_mut_with: cell was filled by closure")
+ }
+ }
+
+ self.borrow_mut().unwrap()
+ }
+
+ /// Same as `borrow_with`, but allows the initializing function to fail.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the cell becomes filled as a side effect of `f`.
+ pub fn try_borrow_with<E, F>(&self, f: F) -> Result<&T, E>
+ where F: FnOnce() -> Result<T, E>
+ {
+ if let Some(value) = self.borrow() {
+ return Ok(value);
+ }
+ let value = f()?;
+ if self.fill(value).is_err() {
+ panic!("try_borrow_with: cell was filled by closure")
+ }
+ Ok(self.borrow().unwrap())
+ }
+
+ /// Same as `borrow_mut_with`, but allows the initializing function to fail.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the cell becomes filled as a side effect of `f`.
+ pub fn try_borrow_mut_with<E, F>(&mut self, f: F) -> Result<&mut T, E>
+ where F: FnOnce() -> Result<T, E>
+ {
+ if self.filled() {
+ return Ok(self.borrow_mut().unwrap());
+ }
+ let value = f()?;
+ if self.fill(value).is_err() {
+ panic!("try_borrow_mut_with: cell was filled by closure")
+ }
+ Ok(self.borrow_mut().unwrap())
+ }
+
+ /// Consumes this `LazyCell`, returning the underlying value.
+ pub fn into_inner(self) -> Option<T> {
+ // Rust 1.25 changed UnsafeCell::into_inner() from unsafe to safe
+ // function. This unsafe can be removed when supporting Rust older than
+ // 1.25 is not needed.
+ #[allow(unused_unsafe)]
+ unsafe { self.inner.into_inner() }
+ }
+}
+
+impl<T: Copy> LazyCell<T> {
+ /// Returns a copy of the contents of the lazy cell.
+ ///
+ /// This function will return `Some` if the cell has been previously initialized,
+ /// and `None` if it has not yet been initialized.
+ pub fn get(&self) -> Option<T> {
+ unsafe { *self.inner.get() }
+ }
+}
+
+impl<T> Default for LazyCell<T> {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+impl <T: Clone> Clone for LazyCell<T> {
+ /// Create a clone of this `LazyCell`
+ ///
+ /// If self has not been initialized, returns an uninitialized `LazyCell`
+ /// otherwise returns a `LazyCell` already initialized with a clone of the
+ /// contents of self.
+ fn clone(&self) -> LazyCell<T> {
+ LazyCell { inner: UnsafeCell::new(self.borrow().map(Clone::clone) ) }
+ }
+}
+
+// Tracks the AtomicLazyCell inner state
+const NONE: usize = 0;
+const LOCK: usize = 1;
+const SOME: usize = 2;
+
+/// A lazily filled and thread-safe `Cell`, with frozen contents.
+#[derive(Debug)]
+pub struct AtomicLazyCell<T> {
+ inner: UnsafeCell<Option<T>>,
+ state: AtomicUsize,
+}
+
+impl<T> AtomicLazyCell<T> {
+ /// An empty `AtomicLazyCell`.
+ pub const NONE: Self = Self {
+ inner: UnsafeCell::new(None),
+ state: AtomicUsize::new(NONE),
+ };
+
+ /// Creates a new, empty, `AtomicLazyCell`.
+ pub fn new() -> AtomicLazyCell<T> {
+ Self::NONE
+ }
+
+ /// Put a value into this cell.
+ ///
+ /// This function will return `Err(value)` if the cell is already full.
+ pub fn fill(&self, t: T) -> Result<(), T> {
+ if NONE != self.state.compare_and_swap(NONE, LOCK, Ordering::Acquire) {
+ return Err(t);
+ }
+
+ unsafe { *self.inner.get() = Some(t) };
+
+ if LOCK != self.state.compare_and_swap(LOCK, SOME, Ordering::Release) {
+ panic!("unable to release lock");
+ }
+
+ Ok(())
+ }
+
+ /// Put a value into this cell.
+ ///
+ /// Note that this function is infallible but requires `&mut self`. By
+ /// requiring `&mut self` we're guaranteed that no active borrows to this
+ /// cell can exist so we can always fill in the value. This may not always
+ /// be usable, however, as `&mut self` may not be possible to borrow.
+ ///
+ /// # Return value
+ ///
+ /// This function returns the previous value, if any.
+ pub fn replace(&mut self, value: T) -> Option<T> {
+ match mem::replace(self.state.get_mut(), SOME) {
+ NONE | SOME => {}
+ _ => panic!("cell in inconsistent state"),
+ }
+ mem::replace(unsafe { &mut *self.inner.get() }, Some(value))
+ }
+
+ /// Test whether this cell has been previously filled.
+ pub fn filled(&self) -> bool {
+ self.state.load(Ordering::Acquire) == SOME
+ }
+
+ /// Borrows the contents of this lazy cell for the duration of the cell
+ /// itself.
+ ///
+ /// This function will return `Some` if the cell has been previously
+ /// initialized, and `None` if it has not yet been initialized.
+ pub fn borrow(&self) -> Option<&T> {
+ match self.state.load(Ordering::Acquire) {
+ SOME => unsafe { &*self.inner.get() }.as_ref(),
+ _ => None,
+ }
+ }
+
+ /// Consumes this `LazyCell`, returning the underlying value.
+ pub fn into_inner(self) -> Option<T> {
+ // Rust 1.25 changed UnsafeCell::into_inner() from unsafe to safe
+ // function. This unsafe can be removed when supporting Rust older than
+ // 1.25 is not needed.
+ #[allow(unused_unsafe)]
+ unsafe { self.inner.into_inner() }
+ }
+}
+
+impl<T: Copy> AtomicLazyCell<T> {
+ /// Returns a copy of the contents of the lazy cell.
+ ///
+ /// This function will return `Some` if the cell has been previously initialized,
+ /// and `None` if it has not yet been initialized.
+ pub fn get(&self) -> Option<T> {
+ match self.state.load(Ordering::Acquire) {
+ SOME => unsafe { *self.inner.get() },
+ _ => None,
+ }
+ }
+}
+
+impl<T> Default for AtomicLazyCell<T> {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+impl<T: Clone> Clone for AtomicLazyCell<T> {
+ /// Create a clone of this `AtomicLazyCell`
+ ///
+ /// If self has not been initialized, returns an uninitialized `AtomicLazyCell`
+ /// otherwise returns an `AtomicLazyCell` already initialized with a clone of the
+ /// contents of self.
+ fn clone(&self) -> AtomicLazyCell<T> {
+ self.borrow().map_or(
+ Self::NONE,
+ |v| AtomicLazyCell {
+ inner: UnsafeCell::new(Some(v.clone())),
+ state: AtomicUsize::new(SOME),
+ }
+ )
+ }
+}
+
+unsafe impl<T: Sync + Send> Sync for AtomicLazyCell<T> {}
+
+unsafe impl<T: Send> Send for AtomicLazyCell<T> {}
+
+#[cfg(test)]
+mod tests {
+ use super::{AtomicLazyCell, LazyCell};
+
+ #[test]
+ fn test_borrow_from_empty() {
+ let lazycell: LazyCell<usize> = LazyCell::new();
+
+ let value = lazycell.borrow();
+ assert_eq!(value, None);
+
+ let value = lazycell.get();
+ assert_eq!(value, None);
+ }
+
+ #[test]
+ fn test_fill_and_borrow() {
+ let lazycell = LazyCell::new();
+
+ assert!(!lazycell.filled());
+ lazycell.fill(1).unwrap();
+ assert!(lazycell.filled());
+
+ let value = lazycell.borrow();
+ assert_eq!(value, Some(&1));
+
+ let value = lazycell.get();
+ assert_eq!(value, Some(1));
+ }
+
+ #[test]
+ fn test_borrow_mut() {
+ let mut lazycell = LazyCell::new();
+ assert!(lazycell.borrow_mut().is_none());
+
+ lazycell.fill(1).unwrap();
+ assert_eq!(lazycell.borrow_mut(), Some(&mut 1));
+
+ *lazycell.borrow_mut().unwrap() = 2;
+ assert_eq!(lazycell.borrow_mut(), Some(&mut 2));
+
+ // official way to reset the cell
+ lazycell = LazyCell::new();
+ assert!(lazycell.borrow_mut().is_none());
+ }
+
+ #[test]
+ fn test_already_filled_error() {
+ let lazycell = LazyCell::new();
+
+ lazycell.fill(1).unwrap();
+ assert_eq!(lazycell.fill(1), Err(1));
+ }
+
+ #[test]
+ fn test_borrow_with() {
+ let lazycell = LazyCell::new();
+
+ let value = lazycell.borrow_with(|| 1);
+ assert_eq!(&1, value);
+ }
+
+ #[test]
+ fn test_borrow_with_already_filled() {
+ let lazycell = LazyCell::new();
+ lazycell.fill(1).unwrap();
+
+ let value = lazycell.borrow_with(|| 1);
+ assert_eq!(&1, value);
+ }
+
+ #[test]
+ fn test_borrow_with_not_called_when_filled() {
+ let lazycell = LazyCell::new();
+
+ lazycell.fill(1).unwrap();
+
+ let value = lazycell.borrow_with(|| 2);
+ assert_eq!(&1, value);
+ }
+
+ #[test]
+ #[should_panic]
+ fn test_borrow_with_sound_with_reentrancy() {
+ // Kudos to dbaupp for discovering this issue
+ // https://www.reddit.com/r/rust/comments/5vs9rt/lazycell_a_rust_library_providing_a_lazilyfilled/de527xm/
+ let lazycell: LazyCell<Box<i32>> = LazyCell::new();
+
+ let mut reference: Option<&i32> = None;
+
+ lazycell.borrow_with(|| {
+ let _ = lazycell.fill(Box::new(1));
+ reference = lazycell.borrow().map(|r| &**r);
+ Box::new(2)
+ });
+ }
+
+ #[test]
+ fn test_borrow_mut_with() {
+ let mut lazycell = LazyCell::new();
+
+ {
+ let value = lazycell.borrow_mut_with(|| 1);
+ assert_eq!(&mut 1, value);
+ *value = 2;
+ }
+ assert_eq!(&2, lazycell.borrow().unwrap());
+ }
+
+ #[test]
+ fn test_borrow_mut_with_already_filled() {
+ let mut lazycell = LazyCell::new();
+ lazycell.fill(1).unwrap();
+
+ let value = lazycell.borrow_mut_with(|| 1);
+ assert_eq!(&1, value);
+ }
+
+ #[test]
+ fn test_borrow_mut_with_not_called_when_filled() {
+ let mut lazycell = LazyCell::new();
+
+ lazycell.fill(1).unwrap();
+
+ let value = lazycell.borrow_mut_with(|| 2);
+ assert_eq!(&1, value);
+ }
+
+ #[test]
+ fn test_try_borrow_with_ok() {
+ let lazycell = LazyCell::new();
+ let result = lazycell.try_borrow_with::<(), _>(|| Ok(1));
+ assert_eq!(result, Ok(&1));
+ }
+
+ #[test]
+ fn test_try_borrow_with_err() {
+ let lazycell = LazyCell::<()>::new();
+ let result = lazycell.try_borrow_with(|| Err(1));
+ assert_eq!(result, Err(1));
+ }
+
+ #[test]
+ fn test_try_borrow_with_already_filled() {
+ let lazycell = LazyCell::new();
+ lazycell.fill(1).unwrap();
+ let result = lazycell.try_borrow_with::<(), _>(|| unreachable!());
+ assert_eq!(result, Ok(&1));
+ }
+
+ #[test]
+ #[should_panic]
+ fn test_try_borrow_with_sound_with_reentrancy() {
+ let lazycell: LazyCell<Box<i32>> = LazyCell::new();
+
+ let mut reference: Option<&i32> = None;
+
+ let _ = lazycell.try_borrow_with::<(), _>(|| {
+ let _ = lazycell.fill(Box::new(1));
+ reference = lazycell.borrow().map(|r| &**r);
+ Ok(Box::new(2))
+ });
+ }
+
+ #[test]
+ fn test_try_borrow_mut_with_ok() {
+ let mut lazycell = LazyCell::new();
+ {
+ let result = lazycell.try_borrow_mut_with::<(), _>(|| Ok(1));
+ assert_eq!(result, Ok(&mut 1));
+ *result.unwrap() = 2;
+ }
+ assert_eq!(&mut 2, lazycell.borrow().unwrap());
+ }
+
+ #[test]
+ fn test_try_borrow_mut_with_err() {
+ let mut lazycell = LazyCell::<()>::new();
+ let result = lazycell.try_borrow_mut_with(|| Err(1));
+ assert_eq!(result, Err(1));
+ }
+
+ #[test]
+ fn test_try_borrow_mut_with_already_filled() {
+ let mut lazycell = LazyCell::new();
+ lazycell.fill(1).unwrap();
+ let result = lazycell.try_borrow_mut_with::<(), _>(|| unreachable!());
+ assert_eq!(result, Ok(&mut 1));
+ }
+
+ #[test]
+ fn test_into_inner() {
+ let lazycell = LazyCell::new();
+
+ lazycell.fill(1).unwrap();
+ let value = lazycell.into_inner();
+ assert_eq!(value, Some(1));
+ }
+
+ #[test]
+ fn test_atomic_borrow_from_empty() {
+ let lazycell: AtomicLazyCell<usize> = AtomicLazyCell::new();
+
+ let value = lazycell.borrow();
+ assert_eq!(value, None);
+
+ let value = lazycell.get();
+ assert_eq!(value, None);
+ }
+
+ #[test]
+ fn test_atomic_fill_and_borrow() {
+ let lazycell = AtomicLazyCell::new();
+
+ assert!(!lazycell.filled());
+ lazycell.fill(1).unwrap();
+ assert!(lazycell.filled());
+
+ let value = lazycell.borrow();
+ assert_eq!(value, Some(&1));
+
+ let value = lazycell.get();
+ assert_eq!(value, Some(1));
+ }
+
+ #[test]
+ fn test_atomic_already_filled_panic() {
+ let lazycell = AtomicLazyCell::new();
+
+ lazycell.fill(1).unwrap();
+ assert_eq!(1, lazycell.fill(1).unwrap_err());
+ }
+
+ #[test]
+ fn test_atomic_into_inner() {
+ let lazycell = AtomicLazyCell::new();
+
+ lazycell.fill(1).unwrap();
+ let value = lazycell.into_inner();
+ assert_eq!(value, Some(1));
+ }
+
+ #[test]
+ fn normal_replace() {
+ let mut cell = LazyCell::new();
+ assert_eq!(cell.fill(1), Ok(()));
+ assert_eq!(cell.replace(2), Some(1));
+ assert_eq!(cell.replace(3), Some(2));
+ assert_eq!(cell.borrow(), Some(&3));
+
+ let mut cell = LazyCell::new();
+ assert_eq!(cell.replace(2), None);
+ }
+
+ #[test]
+ fn atomic_replace() {
+ let mut cell = AtomicLazyCell::new();
+ assert_eq!(cell.fill(1), Ok(()));
+ assert_eq!(cell.replace(2), Some(1));
+ assert_eq!(cell.replace(3), Some(2));
+ assert_eq!(cell.borrow(), Some(&3));
+ }
+
+ #[test]
+ fn clone() {
+ let mut cell = LazyCell::new();
+ let clone1 = cell.clone();
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(cell.fill(1), Ok(()));
+ let mut clone2 = cell.clone();
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(clone2.borrow(), Some(&1));
+ assert_eq!(cell.replace(2), Some(1));
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(clone2.borrow(), Some(&1));
+ assert_eq!(clone1.fill(3), Ok(()));
+ assert_eq!(clone2.replace(4), Some(1));
+ assert_eq!(clone1.borrow(), Some(&3));
+ assert_eq!(clone2.borrow(), Some(&4));
+ assert_eq!(cell.borrow(), Some(&2));
+ }
+
+ #[test]
+ fn clone_atomic() {
+ let mut cell = AtomicLazyCell::new();
+ let clone1 = cell.clone();
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(cell.fill(1), Ok(()));
+ let mut clone2 = cell.clone();
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(clone2.borrow(), Some(&1));
+ assert_eq!(cell.replace(2), Some(1));
+ assert_eq!(clone1.borrow(), None);
+ assert_eq!(clone2.borrow(), Some(&1));
+ assert_eq!(clone1.fill(3), Ok(()));
+ assert_eq!(clone2.replace(4), Some(1));
+ assert_eq!(clone1.borrow(), Some(&3));
+ assert_eq!(clone2.borrow(), Some(&4));
+ assert_eq!(cell.borrow(), Some(&2));
+ }
+
+ #[test]
+ fn default() {
+ #[derive(Default)]
+ struct Defaultable;
+ struct NonDefaultable;
+
+ let _: LazyCell<Defaultable> = LazyCell::default();
+ let _: LazyCell<NonDefaultable> = LazyCell::default();
+
+ let _: AtomicLazyCell<Defaultable> = AtomicLazyCell::default();
+ let _: AtomicLazyCell<NonDefaultable> = AtomicLazyCell::default();
+ }
+}
diff --git a/vendor/lazycell/src/serde_impl.rs b/vendor/lazycell/src/serde_impl.rs
new file mode 100644
index 0000000..8f08f7b
--- /dev/null
+++ b/vendor/lazycell/src/serde_impl.rs
@@ -0,0 +1,86 @@
+// Copyright (c) 2020 Nikita Pekin and the lazycell contributors
+// See the README.md file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.use serde::ser::{Serialize, Serializer};
+use serde::ser::{Serialize, Serializer};
+use serde::de::{self, Deserialize, Deserializer, Visitor};
+
+use std::fmt;
+use std::marker::PhantomData;
+
+use super::{LazyCell, AtomicLazyCell};
+
+impl<T: Serialize> Serialize for LazyCell<T> {
+ fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+ match self.borrow() {
+ Some(val) => serializer.serialize_some(val),
+ None => serializer.serialize_none()
+ }
+ }
+}
+
+
+impl<T: Serialize> Serialize for AtomicLazyCell<T> {
+ fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+ match self.borrow() {
+ Some(val) => serializer.serialize_some(val),
+ None => serializer.serialize_none()
+ }
+ }
+}
+
+struct LazyCellVisitor<T>(PhantomData<*const T>);
+impl<'de, T: Deserialize<'de>> Visitor<'de> for LazyCellVisitor<T> {
+ type Value = LazyCell<T>;
+
+ fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("a LazyCell")
+ }
+
+ fn visit_some<D: Deserializer<'de>>(self, deserializer: D) -> Result<Self::Value, D::Error> {
+ let mut cell = LazyCell::new();
+ cell.replace(T::deserialize(deserializer)?);
+ Ok(cell)
+ }
+
+ fn visit_none<E: de::Error>(self) -> Result<Self::Value, E> {
+ Ok(LazyCell::new())
+ }
+}
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for LazyCell<T> {
+ fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+ deserializer.deserialize_option(LazyCellVisitor(PhantomData))
+ }
+}
+
+
+struct AtomicLazyCellVisitor<T>(PhantomData<*const T>);
+impl<'de, T: Deserialize<'de>> Visitor<'de> for AtomicLazyCellVisitor<T> {
+ type Value = AtomicLazyCell<T>;
+
+ fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+ formatter.write_str("an AtomicLazyCell")
+ }
+
+ fn visit_some<D: Deserializer<'de>>(self, deserializer: D) -> Result<Self::Value, D::Error> {
+ let mut cell = AtomicLazyCell::new();
+ cell.replace(T::deserialize(deserializer)?);
+ Ok(cell)
+ }
+
+ fn visit_none<E: de::Error>(self) -> Result<Self::Value, E> {
+ Ok(AtomicLazyCell::new())
+ }
+}
+
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for AtomicLazyCell<T> {
+ fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+ deserializer.deserialize_option(AtomicLazyCellVisitor(PhantomData))
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 04:49:25 +0000