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