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An idiomatic C++ client library for the Cloud Natural Language API, 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.
QuickstartThe 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.
#include "google/cloud/language/v2/language_client.h"
#include <iostream>
auto constexpr kText = R"""(
Four score and seven years ago our fathers brought forth on this
continent, a new nation, conceived in Liberty, and dedicated to
the proposition that all men are created equal.)""";
int main(int argc, char* argv[]) try {
if (argc != 1) {
std::cerr << "Usage: " << argv[0] << "\n";
return 1;
}
namespace language = ::google::cloud::language_v2;
auto client = language::LanguageServiceClient(
language::MakeLanguageServiceConnection());
google::cloud::language::v2::Document document;
document.set_type(google::cloud::language::v2::Document::PLAIN_TEXT);
document.set_content(kText);
document.set_language_code("en-US");
auto response = client.AnalyzeEntities(document);
if (!response) throw std::move(response).status();
for (auto const& entity : response->entities()) {
if (entity.type() != google::cloud::language::v2::Entity::NUMBER) continue;
std::cout << entity.DebugString() << "\n";
}
return 0;
} catch (google::cloud::Status const& status) {
std::cerr << "google::cloud::Status thrown: " << status << "\n";
return 1;
}
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.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-14 UTC."],[[["This webpage provides documentation for the Cloud Natural Language API C++ client library, which offers natural language understanding technologies such as sentiment analysis and entity recognition."],["The library includes multiple `*Client` classes, specifically `language_v1::LanguageServiceClient` and `language_v2::LanguageServiceClient`, each exposing RPCs as member functions."],["The latest release candidate version of the C++ client library is 2.37.0-rc, with numerous previous versions listed for reference, but note that this library does not follow Semantic Versioning."],["A quickstart code example is provided to demonstrate the library's API, illustrating how to analyze entities within a text document using the `AnalyzeEntities` method."],["The documentation also covers error handling, endpoint overriding, authentication credential changes, retry policies, and environment variables for configuring the library's behavior."]]],[]]
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