136 lines
4.7 KiB
C++
136 lines
4.7 KiB
C++
#include <iostream>
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#include "simdjson.h"
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using namespace std;
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using namespace simdjson;
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#ifdef SIMDJSON_CPLUSPLUS17
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SIMDJSON_PUSH_DISABLE_ALL_WARNINGS
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void basics_error_1() {
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dom::parser parser;
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auto json = "1"_padded;
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auto [doc, error] = parser.parse(json); // doc is a dom::element
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if (error) { cerr << error << endl; exit(1); }
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// Use document here now that we've checked for the error
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}
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SIMDJSON_POP_DISABLE_WARNINGS
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#endif
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void basics_error_2() {
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dom::parser parser;
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auto json = "1"_padded;
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dom::element doc;
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simdjson::error_code error;
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parser.parse(json).tie(doc, error); // <-- Assigns to doc and error just like "auto [doc, error]"}
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}
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void basics_error_3() {
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auto cars_json = R"( [
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{ "make": "Toyota", "model": "Camry", "year": 2018, "tire_pressure": [ 40.1, 39.9, 37.7, 40.4 ] },
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{ "make": "Kia", "model": "Soul", "year": 2012, "tire_pressure": [ 30.1, 31.0, 28.6, 28.7 ] },
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{ "make": "Toyota", "model": "Tercel", "year": 1999, "tire_pressure": [ 29.8, 30.0, 30.2, 30.5 ] }
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] )"_padded;
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dom::parser parser;
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dom::array cars;
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simdjson::error_code error;
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parser.parse(cars_json).get<dom::array>().tie(cars, error);
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if (error) { cerr << error << endl; exit(1); }
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// Iterating through an array of objects
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for (dom::element car_element : cars) {
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dom::object car;
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car_element.get<dom::object>().tie(car, error);
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if (error) { cerr << error << endl; exit(1); }
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// Accessing a field by name
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dom::element make, model;
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car["make"].tie(make, error);
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if (error) { cerr << error << endl; exit(1); }
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car["model"].tie(model, error);
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if (error) { cerr << error << endl; exit(1); }
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cout << "Make/Model: " << make << "/" << model << endl;
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// Casting a JSON element to an integer
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uint64_t year;
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car["year"].get<uint64_t>().tie(year, error);
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if (error) { cerr << error << endl; exit(1); }
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cout << "- This car is " << 2020 - year << "years old." << endl;
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// Iterating through an array of floats
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double total_tire_pressure = 0;
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dom::array tire_pressure_array;
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car["tire_pressure"].get<dom::array>().tie(tire_pressure_array, error);
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if (error) { cerr << error << endl; exit(1); }
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for (dom::element tire_pressure_element : tire_pressure_array) {
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double tire_pressure;
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tire_pressure_element.get<double>().tie(tire_pressure, error);
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if (error) { cerr << error << endl; exit(1); }
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total_tire_pressure += tire_pressure;
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}
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cout << "- Average tire pressure: " << (total_tire_pressure / 4) << endl;
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// Writing out all the information about the car
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for (auto field : car) {
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cout << "- " << field.key << ": " << field.value << endl;
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}
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}
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}
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#ifdef SIMDJSON_CPLUSPLUS17
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void basics_error_3_cpp17() {
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auto cars_json = R"( [
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{ "make": "Toyota", "model": "Camry", "year": 2018, "tire_pressure": [ 40.1, 39.9, 37.7, 40.4 ] },
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{ "make": "Kia", "model": "Soul", "year": 2012, "tire_pressure": [ 30.1, 31.0, 28.6, 28.7 ] },
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{ "make": "Toyota", "model": "Tercel", "year": 1999, "tire_pressure": [ 29.8, 30.0, 30.2, 30.5 ] }
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] )"_padded;
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dom::parser parser;
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auto [cars, error] = parser.parse(cars_json).get<dom::array>();
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if (error) { cerr << error << endl; exit(1); }
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// Iterating through an array of objects
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for (dom::element car_element : cars) {
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dom::object car;
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car_element.get<dom::object>().tie(car, error);
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if (error) { cerr << error << endl; exit(1); }
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// Accessing a field by name
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dom::element make, model;
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car["make"].tie(make, error);
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if (error) { cerr << error << endl; exit(1); }
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car["model"].tie(model, error);
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if (error) { cerr << error << endl; exit(1); }
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cout << "Make/Model: " << make << "/" << model << endl;
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// Casting a JSON element to an integer
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uint64_t year;
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car["year"].get<uint64_t>().tie(year, error);
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if (error) { cerr << error << endl; exit(1); }
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cout << "- This car is " << 2020 - year << "years old." << endl;
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// Iterating through an array of floats
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double total_tire_pressure = 0;
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dom::array tire_pressure_array;
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car["tire_pressure"].get<dom::array>().tie(tire_pressure_array, error);
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if (error) { cerr << error << endl; exit(1); }
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for (dom::element tire_pressure_element : tire_pressure_array) {
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double tire_pressure;
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tire_pressure_element.get<double>().tie(tire_pressure, error);
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if (error) { cerr << error << endl; exit(1); }
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total_tire_pressure += tire_pressure;
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}
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cout << "- Average tire pressure: " << (total_tire_pressure / 4) << endl;
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// Writing out all the information about the car
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for (auto [key, value] : car) {
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cout << "- " << key << ": " << value << endl;
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}
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}
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}
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#endif
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int main() {
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return 0;
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}
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