take_while snippet (#299)

* Implementation of take_while operator and tests

* Refactored tests and changed documentation

* Removed 'noexcept' specifier from helper class in take_while test

* Removed 'const' specifier from not_equal_to helper class in take_while test in order to get rid of MSVC assignment operator warning.

* decouple take_while from observable

* Added take_while snippet.

* Fixed CMakeLists closing parenthesis.

1 files changed, 17 insertions, 0 deletions

diff --git a/Rx/v2/examples/doxygen/take_while.cpp b/Rx/v2/examples/doxygen/take_while.cpp
new file mode 100644
index 0000000..ea92826
--- /dev/null
+++ b/Rx/v2/examples/doxygen/take_while.cpp
@@ -0,0 +1,17 @@
+#include "rxcpp/rx.hpp"
+
+#include "rxcpp/rx-test.hpp"
+#include "catch.hpp"
+
+SCENARIO("take_while sample"){
+    printf("//! [take_while sample]\n");
+    auto values = rxcpp::observable<>::range(1, 8).
+        take_while([](int v){
+            return v <= 4;
+        });
+    values.
+        subscribe(
+            [](int v){printf("OnNext: %d\n", v);},
+            [](){printf("OnCompleted\n");});
+    printf("//! [take_while sample]\n");
+}
\ No newline at end of file