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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 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/v1/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_v1;
auto client = language::LanguageServiceClient(
language::MakeLanguageServiceConnection());
google::cloud::language::v1::Document document;
document.set_type(google::cloud::language::v1::Document::PLAIN_TEXT);
document.set_content(kText);
document.set_language("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::v1::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;
}
The main class in this library is language_v1::LanguageServiceClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock language_v1::LanguageServiceClient 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 functionalities such as sentiment analysis and entity recognition."],["The latest release candidate version available is 2.37.0-rc, with multiple previous versions listed down to 2.11.0."],["The `language_v1::LanguageServiceClient` class is the core component of this library, exposing all Remote Procedure Calls (RPCs) as its member functions."],["Google Cloud C++ client libraries, including this one, do not adhere to Semantic Versioning."],["The provided quickstart example demonstrates basic usage of the library, including setting up the language client, creating a document with plain text, and calling the AnalyzeEntities function."]]],[]]
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