Docs reference: https://gutev.dev/live_cells_cpp/md_doc_22-expressions.html
I noticed a few issues with the following example:
auto a = live_cells::variable(0);
auto b = live_cells::variable(1);
auto c = live_cells::computed([=] {
return a() + live_cells::peek(b);
});
auto watch = live_cells::watch([=] {
std::cout << c() << std::endl;
});
a = 3; // Prints: 4
b = 5; // Doesn't print anything
a = 7; // Prints: 13The std::cout << c() << std::endl; line generates the following error:
binary '<<': no operator found which takes a right-hand operand of type 'live_cells::make_cell<live_cells::compute_cell_base<_T0,live_cells::constant_cell<T>,live_cells::peek_cell<live_cells::mutable_cell<T>>>>' (or there is no acceptable conversion)
Reading the code docs:
* The argument cells, referenced within \a compute, are
* determined dynamically. For this to work, the values of the
* argument cells must be referenced using the function call
* operator and not the \p Cell::value() getter method.
I was able to fix the error by instead doing:
auto c = live_cells::computed([=] {
return a() + live_cells::peek(b)();
});The last minor thing is that the // Prints: 13 should be // Prints: 12
After making those changes and adding a few extra logging lines, I end up with this -
Example:
auto a = live_cells::variable(0);
auto b = live_cells::variable(1);
auto c = live_cells::computed([=] {
std::cout << "[computed] c = ";
auto result = a() + live_cells::peek(b)();
std::cout << result << " [/computed]" << std::endl;
return result;
});
auto watch = live_cells::watch([=] {
std::cout << "[watch] " << c() << " [/watch]" << std::endl;
});
std::cout << "The next line should be '4'" << std::endl;
a = 3; // Prints: 4
std::cout << "(No next line)" << std::endl;
b = 5; // Doesn't print anything
std::cout << "The next line should be '12'" << std::endl;
a = 7; // Prints: 12Output:
[watch] [computed] c = 1 [/computed]
[computed] c = 1 [/computed]
1 [/watch]
The next line should be '4'
[watch] [computed] c = 4 [/computed]
4 [/watch]
(No next line)
The next line should be '12'
[watch] [computed] c = 12 [/computed]
12 [/watch]
Is that correct or should the original error be addressed another way?
Docs reference: https://gutev.dev/live_cells_cpp/md_doc_22-expressions.html
I noticed a few issues with the following example:
The
std::cout << c() << std::endl;line generates the following error:Reading the code docs:
I was able to fix the error by instead doing:
The last minor thing is that the
// Prints: 13should be// Prints: 12After making those changes and adding a few extra logging lines, I end up with this -
Example:
Output:
Is that correct or should the original error be addressed another way?