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Apache license (#1309)
* Switch to Apache 2.0 with LLVM Exceptions * Tweak formatting * Update LICENSE * Add new CLA
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family-names: Sutter
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repository-code: 'https://github.com/hsutter/cppfront'
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abstract: A personal experimental C++ Syntax 2 -> Syntax 1 compiler
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license: CC-BY-NC-ND-4.0
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license: Apache-2.0 WITH LLVM-exception

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This is the contributor license agreement. If you are looking for the usage license, see here: [usage license](https://github.com/hsutter/cppfront/blob/main/LICENSE)
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## Contributing
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## cppfront Contributor License Agreement
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This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant the rights to use your contribution. A sample of the CLA is below.
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By contributing content to cppfront (i.e., submitting a pull request for inclusion in this repository):
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- You warrant that your material is original, or you have the right to contribute it.
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- With respect to the material that you own, you grant a worldwide, non-exclusive, irrevocable, transferable, and royalty-free license to your contributed material to Herb Sutter to display, reproduce, perform, distribute, and create derivative works of that material for commercial or non-commercial use.
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- With respect to any other material you contribute, such material must be under a worldwide, non-exclusive, irrevocable, transferable, and royalty-free license sufficient to allow Herb Sutter to display, reproduce, perform, distribute, and create derivative works of that material for commercial or non-commercial use.
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When you submit a pull request, a CLA bot or human will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., status check, comment). Simply follow the instructions provided. You will only need to do this once for all your contributions to cppfront.
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## Cppfront Contribution License Agreement (Sample)
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A sample can be found here: [Cppfront CLA 2024-10 - sample.pdf](docs/Cppfront CLA 2024-10 - sample.pdf)

Diff for: ‎LICENSE

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Copyright (c) Herb Sutter
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SPDX-License-Identifier: CC-BY-NC-ND-4.0
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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Copyright 2022-2024 Herb Sutter
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SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Cppfront is under the Apache License v2.0 with LLVM Exception:
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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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1. Definitions.
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"License" shall mean the terms and conditions for use, reproduction,
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