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#include "rxcpp/rx.hpp"
#include "rxcpp/rx-test.hpp"
#include "catch.hpp"
SCENARIO("reduce sample"){
printf("//! [reduce sample]\n");
auto values = rxcpp::observable<>::range(1, 7).
reduce(
std::make_pair(0, 1.0),
[](std::pair<int, double> seed, int v){
seed.first += 1;
seed.second *= v;
return seed;
},
[](std::pair<int, double> res){
return std::pow(res.second, 1.0 / res.first);
});
values.
subscribe(
[](double v){printf("OnNext: %lf\n", v);},
[](){printf("OnCompleted\n");});
printf("//! [reduce sample]\n");
}
SCENARIO("reduce empty sample"){
printf("//! [reduce empty sample]\n");
auto values = rxcpp::observable<>::empty<int>().
reduce(
1,
[](int,int){return 0;},
[](int res){return res;});
values.
subscribe(
[](int v){printf("OnNext: %d\n", v);},
[](){printf("OnCompleted\n");});
printf("//! [reduce empty sample]\n");
}
SCENARIO("reduce exception from accumulator sample"){
printf("//! [reduce exception from accumulator sample]\n");
auto values = rxcpp::observable<>::range(1, 3).
reduce(
0,
[](int seed, int v){
if (v == 2)
throw std::runtime_error("Exception from accumulator");
return seed;
},
[](int res){return res;});
values.
subscribe(
[](int v){printf("OnNext: %d\n", v);},
[](std::exception_ptr ep){
try {std::rethrow_exception(ep);}
catch (const std::exception& ex) {
printf("OnError: %s\n", ex.what());
}
},
[](){printf("OnCompleted\n");});
printf("//! [reduce exception from accumulator sample]\n");
}
SCENARIO("reduce exception from result selector sample"){
printf("//! [reduce exception from result selector sample]\n");
auto values = rxcpp::observable<>::range(1, 3).
reduce(
0,
[](int seed, int v){return seed + v;},
[](int res){
throw std::runtime_error("Exception from result selector");
return res;
});
values.
subscribe(
[](int v){printf("OnNext: %d\n", v);},
[](std::exception_ptr ep){
try {std::rethrow_exception(ep);}
catch (const std::exception& ex) {
printf("OnError: %s\n", ex.what());
}
},
[](){printf("OnCompleted\n");});
printf("//! [reduce exception from result selector sample]\n");
}
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