Add example of using fplus::identity to get the value of a variant, i…

…ssue #285
Dobiasd · Dec 25, 2023 · 1445d5d · 1445d5d
1 parent 739c977
commit 1445d5d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/test/variant_test.cpp b/test/variant_test.cpp
@@ -119,6 +119,10 @@ TEST_CASE("variant_test - visit")
     REQUIRE_EQ(print_output, "string 3");
     print_output.clear();
 
+    // One can use fplus::identity to use visit_one as a getter:
+    const fplus::maybe<int> y = transform_result.visit_one(fplus::identity<int>);
+    std::cout << fplus::show_maybe(y) << std::endl;
+
     // should not compile
     //std::cout << int_or_string.visit(show_int, show_float) << std::endl;