Cloud Natural Language API C++ Client Library

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.

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.

#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; }

Main classes

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.

More Information