/*!

@mainpage Cloud Natural Language API C++ Client Library

An idiomatic C++ client library for the [Cloud Natural Language API][cloud-service-docs],

a service that provides natural language understanding technologies, such as

sentiment analysis, entity recognition, entity sentiment analysis, and other

text annotations.

While this library is **GA**, please note that the Google Cloud C++ client libraries do **not** follow

[Semantic Versioning](https://semver.org/).

@tableofcontents{HTML:2}

## Quickstart

The following shows the code that you'll run in the

`google/cloud/language/quickstart/` directory,

which should give you a taste of the Cloud Natural Language API C++ client library API.

@snippet quickstart.cc all

## Main classes

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This library offers multiple `*Client` classes, which are listed below. Each one

of these classes exposes all the RPCs for a service as member functions of the

class. This library groups multiple services because they are part of the same

product or are often used together. A typical example may be the administrative

and data plane operations for a single product.

The library also has other classes that provide helpers, configuration

parameters, and infrastructure to mock the `*Client` classes when testing your

application.

- [\c language_v1::LanguageServiceClient](@ref google::cloud::language_v1::LanguageServiceClient)

- [\c language_v2::LanguageServiceClient](@ref google::cloud::language_v2::LanguageServiceClient)

<!-- inject-client-list-end -->

## More Information

- @ref common-error-handling - describes how the library reports errors.

- @ref language-override-endpoint - describes how to override the default

endpoint.

- @ref language-override-authentication - describes how to change the

authentication credentials used by the library.

- @ref language-override-retry - describes how to change the default retry

policies.

- @ref language-env - describes environment variables that can configure the

behavior of the library.

[cloud-service-docs]: https://cloud.google.com/natural-language

*/