If no user-defined move assignment operators are provided for a class type, and all of the following is true:
- there are no user-declared copy constructors;
- there are no user-declared move constructors;
- there are no user-declared copy assignment operators;
- there is no user-declared destructor,
(more…)
From QT’s Purchasing:
//SKProductsRequestDelegate
-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
NSArray<SKProduct *> *products = response.products;
SKProduct *product = [products count] == 1 ? [[products firstObject] retain] : nil;
if (product == nil) {
//Invalid product ID
NSString *invalidId = [response.invalidProductIdentifiers firstObject];
QMetaObject::invokeMethod(backend, "registerQueryFailure", Qt::AutoConnection, Q_ARG(QString, QString::fromNSString(invalidId)));
} else {
//Valid product query
//Create a IosInAppPurchaseProduct
IosInAppPurchaseProduct *validProduct = new IosInAppPurchaseProduct(product, backend->productTypeForProductId(QString::fromNSString([product productIdentifier])));
if (validProduct->thread() != backend->thread()) {
validProduct->moveToThread(backend->thread());
QMetaObject::invokeMethod(backend, "setParentToBackend", Qt::AutoConnection, Q_ARG(QObject*, validProduct));
}
QMetaObject::invokeMethod(backend, "registerProduct", Qt::AutoConnection, Q_ARG(IosInAppPurchaseProduct*, validProduct));
}
[request release];
}
Copy Podfile at the build stage:
message("Copy ${CMAKE_CURRENT_SOURCE_DIR}/Podfile -> ${CMAKE_BINARY_DIR}")
add_custom_target(copy_podfile
COMMAND ${CMAKE_COMMAND} -E copy_if_different
"${CMAKE_CURRENT_SOURCE_DIR}/Podfile"
"${CMAKE_BINARY_DIR}"
COMMENT "Copying Podfile"
)
add_dependencies(${PROJECT_NAME} copy_podfile)
Copy Podfile at the configuration stage:
execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
"${CMAKE_CURRENT_SOURCE_DIR}/Podfile"
"${CMAKE_BINARY_DIR}"
)
I simply opened arboreus_examples/qt6/CMake/UsingSwift/UsingSwift_v3/CMakeLists.txt in QT Creator and was able to build it and run.
In its main.cpp it creates a Swift wrapper and calls method:
ASwift* oSwift = new ASwift(&oEngine);
oSwift->mInit();
_A_DEBUG << oSwift->mString();
Last time I have been working on a C++ binary serialization framework that allows to serialize simple data structures with a few lines of code. First, you add AWL_REFLECT macro to all your structures as follows:
#include "Awl/Reflection.h"
#include <string>
#include <vector>
#include <set>
struct A
{
int a;
bool b;
std::string c;
double d;
AWL_REFLECT(a, b, c, d)
};
The code below compiles and the asserts do not fail:
#include <iostream>
int main()
{
auto a = "str";
const auto& ar = "str";
const char* b = "str";
auto const &c = a;
auto* d = &a;
const auto e = 2;
static_assert(std::is_same_v<const char(&)[4], decltype("str")>);
static_assert(std::is_same_v<const char*, decltype(a)>);
static_assert(std::is_same_v<const char(&)[4], decltype(ar)>);
static_assert(std::is_same_v<const char* const&, decltype(c)>);
static_assert(std::is_same_v<const char**, decltype(d)>);
static_assert(std::is_same_v<const int, decltype(e)>);
std::cout << "a: " << typeid(a).name() << std::endl;
std::cout << "ar: " << typeid(ar).name() << std::endl;
std::cout << "b: " << typeid(b).name() << std::endl;
return 0;
}
And a and b have identical typeids.
The code below is compiled successfully with both GCC and MSVC:
#include <iostream>
#include <sstream>
template <class C>
class basic_format
{
public:
template <typename T>
basic_format & operator << (const T & val)
{
out << val;
return *this;
}
std::basic_string<C> str() const { return out.str(); }
operator std::basic_string<C>() const { return str(); }
private:
std::basic_ostringstream<C> out;
};
The following QML code
Callout
{
id: call
//margins should bound but not assigned
anchors.topMargin: root.above ? undefined : yMargin
anchors.bottomMargin: root.above ? yMargin : undefined
...
}
produced “Cannot anchor to a null item” warning and worked incorrectly.
I tried to replace it with AnchorChanges and PropertyChanges:
import * as readline from 'node:readline/promises';
import { stdin as input, stdout as output } from 'node:process';
import { Writable } from 'node:stream';
var mutableStdout = new Writable({
write: function(chunk, encoding, callback) {
if (!this.muted)
output.write(chunk, encoding);
callback();
}
});
mutableStdout.muted = false;
var rl = readline.createInterface({
input: input,
output: mutableStdout,
terminal: true
});
My Android game crashed on a user’s device at the highlighted line:
GameMovement::GameMovement(GameField& field, CellCoord from, CellCoord to) :
m_field(field),
pBall(m_field.GetCell(from))
{
GameGraph graph(&m_field, from, to);
m_path.reserve(m_field.GetColumnCount() + m_field.GetRowCount());
if (!graph.FindPath(m_path))
{
throw std::runtime_error("Path not found.");
}
if (m_path.size() < 2)
{
throw std::runtime_error("Wrong path.");
}
}
