coffee/continuable
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Denis Blank 2017-10-11 15:18:35 +02:00
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@ -24,30 +24,37 @@ This library provides full feature support of:
// Perform the actual request through a different library, // Perform the actual request through a different library,
// resolve the promise upon completion of the task. // resolve the promise upon completion of the task.
promise.set_value("<html> ... </html>"); promise.set_value("<html> ... </html>");
// Or promise.set_exception(...);
}); });
} }
``` ```
* Continue the continuation using `.then(...)` and `.fail(...)` * Continue the continuation using `.then(...)` and `.fail(...)`
```cpp ```cpp
http_request("example.com") http_request("github.com")
.then([] (std::string result) { .then([] (std::string result) {
// Do something... // Do something...
return http_request("example.com/2") return http_request("travis-ci.org")
}) })
.then([] (std::string result) { .then([] (std::string result) {
// Do more... // Handle the response from 'travis-ci.org'
})
.fail([] (std::exception_ptr ptr) {
try {
std::rethrow_exception(ptr);
} catch(std::exception const& e) {
// Handle the exception or error code here
}
}); });
``` ```
* b * Create connections between the continuables
```cpp ```cpp
h (http_request("github.com") && (http_request("travis-ci.org") || http_request("atom.io")))
.then([](std::string github, std::string travis_or_atom) {
// The callback is called with the response of github and travis or atom.
});
``` ```
* c
```cpp
h
```
* d