enumerate.cpp Error (Activity) E0276: Names following "::" must be class names or namespace names enumerate.cpp 13

[ChuntaoYu]

In the sample code enumerate.cpp，Code: char inputOption = ob_smpl::waitForKeyPressed(); An error is reported. The name following "::" in error (activity) E0276 must be the class name or namespace name enumerate.cpp 13. How can I solve this problem?

// Copyright (c) Orbbec Inc. All Rights Reserved.
// Licensed under the MIT License.

#include <libobsensor/ObSensor.hpp>

#include "utils.hpp"

#include
#include

// get input option
int getInputOption() {
char inputOption = ob_smpl::waitForKeyPressed();
if(inputOption == ESC_KEY) {
return -1;
}
return inputOption - '0';
}

// Print stream profile information.
void printStreamProfile(std::shared_ptrob::StreamProfile profile, uint32_t index) {
// Get the video profile.
auto videoProfile = profile->asob::VideoStreamProfile();
// Get the format.
auto formatName = profile->getFormat();
// Get the width.
auto width = videoProfile->getWidth();
// Get the height.
auto height = videoProfile->getHeight();
// Get the fps.
auto fps = videoProfile->getFps();
std::cout << index << "."
<< "format: " << ob::TypeHelper::convertOBFormatTypeToString(formatName) << ", "
<< "res: " << width << "*" << height << ", "
<< "fps: " << fps << std::endl;
}

// Print accel profile information.
void printAccelProfile(std::shared_ptrob::StreamProfile profile, uint32_t index) {
// Get the profile of accel.
auto accProfile = profile->asob::AccelStreamProfile();
// Get the rate of accel.
auto accRate = accProfile->getSampleRate();
std::cout << index << "."
<< "acc rate: " << ob::TypeHelper::convertOBIMUSampleRateTypeToString(accRate) << std::endl;
}

// Print gyro profile information.
void printGyroProfile(std::shared_ptrob::StreamProfile profile, uint32_t index) {
// Get the profile of gyro.
auto gyroProfile = profile->asob::GyroStreamProfile();
// Get the rate of gyro.
auto gyroRate = gyroProfile->getSampleRate();
std::cout << index << "."
<< "gyro rate: " << ob::TypeHelper::convertOBIMUSampleRateTypeToString(gyroRate) << std::endl;
}

// Enumerate stream profiles.
void enumerateStreamProfiles(std::shared_ptrob::Sensor sensor) {
// Get the list of stream profiles.
auto streamProfileList = sensor->getStreamProfileList();
// Get the sensor type.
auto sensorType = sensor->getType();
for(uint32_t index = 0; index < streamProfileList->getCount(); index++) {
// Get the stream profile.
auto profile = streamProfileList->getProfile(index);
if(sensorType == OB_SENSOR_IR || sensorType == OB_SENSOR_COLOR || sensorType == OB_SENSOR_DEPTH || sensorType == OB_SENSOR_IR_LEFT
|| sensorType == OB_SENSOR_IR_RIGHT) {
printStreamProfile(profile, index);
}
else if(sensorType == OB_SENSOR_ACCEL) {
printAccelProfile(profile, index);
}
else if(sensorType == OB_SENSOR_GYRO) {
printGyroProfile(profile, index);
}
else {
break;
}
}
}

// Enumerate sensors.
void enumerateSensors(std::shared_ptrob::Device device) {
while(true) {
std::cout << "Sensor list: " << std::endl;
// Get the list of sensors.
auto sensorList = device->getSensorList();
for(uint32_t index = 0; index < sensorList->getCount(); index++) {
// Get the sensor type.
auto sensorType = sensorList->getSensorType(index);
std::cout << " - " << index << "."
<< "sensor type: " << ob::TypeHelper::convertOBSensorTypeToString(sensorType) << std::endl;
}

    std::cout << "Select a sensor to enumerate its streams(input sensor index or \'ESC\' to enumerate device): " << std::endl;

    // Select a sensor.
    int sensorSelected = ob_smpl::getInputOption();
    if(sensorSelected >= static_cast<int>(sensorList->getCount()) || sensorSelected < 0) {
        if(sensorSelected == -1) {
            break;
        }
        else {
            std::cout << "\nInvalid input, please reselect the sensor!\n";
            continue;
        }
    }

    // Get sensor from sensorList.
    auto sensor = sensorList->getSensor(sensorSelected);
    enumerateStreamProfiles(sensor);
}

}

int main(void) try {

// Create a context.
ob::Context context;

while(true) {
    // Query the list of connected devices.
    auto deviceList = context.queryDeviceList();
    if(deviceList->getCount() < 1) {
        std::cout << "No device found! Please connect a supported device and retry this program." << std::endl;
        std::cout << "\nPress any key to exit.";
        ob_smpl::waitForKeyPressed();
        return -1;
    }

    std::cout << "enumerated devices: " << std::endl;

    std::shared_ptr<ob::Device>     device     = nullptr;
    std::shared_ptr<ob::DeviceInfo> deviceInfo = nullptr;
    for(uint32_t index = 0; index < deviceList->getCount(); index++) {
        // Get device from deviceList.
        device = deviceList->getDevice(index);
        // Get device information from device
        deviceInfo = device->getDeviceInfo();
        std::cout << "  " << index << "- device name: " << deviceInfo->getName() << ", device pid: 0x" << std::hex << std::setw(4) << std::setfill('0')
                  << deviceInfo->getPid() << std::dec << " ,device SN: " << deviceInfo->getSerialNumber() << ", connection type:" << deviceInfo->getConnectionType() << std::endl;
    }

    std::cout << "Select a device to enumerate its sensors (Input device index or \'ESC\' to exit program):" << std::endl;

    // select a device.
    int deviceSelected = ob_smpl::getInputOption();
    if(deviceSelected >= static_cast<int>(deviceList->getCount()) || deviceSelected < 0) {
        if(deviceSelected == -1) {
            break;
        }
        else {
            std::cout << "\nInvalid input, please reselect the device!\n";
            continue;
        }
    }

    //  Get the device.
    auto selectedDevice = deviceList->getDevice(deviceSelected);
    enumerateSensors(selectedDevice);
}

return 0;

}
catch(ob::Error &e) {
std::cerr << "function:" << e.getFunction() << "\nargs:" << e.getArgs() << "\nmessage:" << e.what() << "\ntype:" << e.getExceptionType() << std::endl;
std::cout << "\nPress any key to exit.";
ob_smpl::waitForKeyPressed();
exit(EXIT_FAILURE);
}