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cqueue-example.cpp
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cqueue-example.cpp
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#include <iostream>
#include <string>
#include <string_view>
#include <algorithm>
#include "cqueue.hpp"
// g++ -std=c++20 -o cqueue-example cqueue-example.cpp
static constexpr std::string_view prefix = " ";
template<typename T>
std::string to_string(const gto::cqueue<T> &queue) {
std::string ret = "{";
ret += "capacity=" + std::to_string(queue.capacity()) + ", ";
ret += "reserved=" + std::to_string(queue.reserved()) + ", ";
ret += "size=" + std::to_string(queue.size()) + ", ";
ret += "content=[";
for (std::size_t i = 0; i < queue.size(); i++) {
ret += (i > 0 ? ", " : "");
ret += std::to_string(queue[i]);
}
ret += "]}";
return ret;
}
void example1() {
std::cout << "example1()" << std::endl;
gto::cqueue<int> queue;
std::cout << prefix << ::to_string(queue) << std::endl;
queue.push(1);
queue.push(2);
queue.push(3);
std::cout << prefix << to_string(queue) << std::endl;
queue[1] = 99;
std::cout << prefix << to_string(queue) << std::endl;
std::cout << prefix << "queue[1] = " << queue[1] << std::endl;
std::cout << prefix << "pop() = " << queue.pop() << std::endl;
std::cout << prefix << to_string(queue) << std::endl;
std::cout << prefix << "front = " << queue.front() << std::endl;
std::cout << prefix << "back = " << queue.back() << std::endl;
std::cout << prefix << "empty = " << (queue.empty() ? "true" : "false") << std::endl;
queue.clear();
std::cout << prefix << to_string(queue) << std::endl;
std::cout << prefix << "empty = " << (queue.empty() ? "true" : "false") << std::endl;
}
void example2() {
std::cout << "example2()" << std::endl;
gto::cqueue<int> queue(1'000'000);
std::cout << prefix << to_string(queue) << std::endl;
queue.push(1);
queue.push(2);
for (int i = 3; i < 13; i++) {
queue.push(i);
}
std::cout << prefix << to_string(queue) << std::endl;
}
void example3() {
std::cout << "example3()" << std::endl;
gto::cqueue<int> queue;
for (int i = 1; i <= 8; i++) {
queue.push(i);
}
std::cout << prefix << to_string(queue) << std::endl;
queue.pop();
queue.pop();
queue.push(9);
queue.push(10);
// memory content is [9, 10, 2, 3, 4, 5, 6, 7, 8]
std::cout << prefix << to_string(queue) << std::endl;
queue.push(11);
// memory content is [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ., ., ., ., ., .]
std::cout << prefix << to_string(queue) << std::endl;
}
void example4() {
std::cout << "example4()" << std::endl;
gto::cqueue<int> queue;
for (int i = 1; i <= 8; i++) {
queue.push(i);
}
std::cout << prefix << to_string(queue) << std::endl;
for (auto &item : queue) {
item++;
}
std::cout << prefix << to_string(queue) << std::endl;
}
void example5() {
std::cout << "example5()" << std::endl;
gto::cqueue<int> queue;
for (int i = 8; i >= 1; i--) {
queue.push(i);
}
queue.pop();
queue.push(99);
std::cout << prefix << to_string(queue) << std::endl;
std::sort(queue.begin(), queue.end());
std::cout << prefix << to_string(queue) << std::endl;
}
void example6() {
std::cout << "example6()" << std::endl;
gto::cqueue<int> queue(2);
queue.push(1);
std::cout << prefix << to_string(queue) << std::endl;
try {
queue[4];
} catch(const std::exception &e) {
std::cout << prefix << "exception: " << e.what() << std::endl;
}
queue.push(2);
std::cout << prefix << to_string(queue) << std::endl;
try {
queue.push(3);
} catch(const std::exception &e) {
std::cout << prefix << "exception: " << e.what() << std::endl;
}
}
int main() {
example1();
example2();
example3();
example4();
example5();
example6();
return 0;
}