resolve ambiguity for vector<array> options

Author: phlptp

tests/OptionTypeTest.cpp

@@ -871,6 +871,23 @@ TEST_CASE_METHOD(TApp, "vectorPair", "[optiontype]") {
     CHECK_THROWS_AS(run(), CLI::ValidationError);
 }
 
+// now with independent type sizes and expected this is possible
+TEST_CASE_METHOD(TApp, "vectorArray", "[optiontype]") {
+
+    std::vector<std::array<int, 3>> custom_opt;
+
+    auto *opt = app.add_option("--set", custom_opt);
+
+    args = {"--set", "1", "2","3", "--set", "3", "4" , "5"};
+
+    run();
+    REQUIRE(2u == custom_opt.size());
+    CHECK(1 == custom_opt[0][0]);
+    CHECK(4 == custom_opt[1][1]);
+    CHECK(opt->get_type_size()==3);
+
+}
+
 TEST_CASE_METHOD(TApp, "vectorPairFail", "[optiontype]") {
 
     std::vector<std::pair<int, std::string>> custom_opt;