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Add support for std::optional

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Fixes #93. This adds C++17 only support for `std::optional` values for
command line parameters.
This commit is contained in:
Jarryd Beck
2018-01-31 18:25:52 +11:00
parent e792760ab9
commit 76bd60dc17
4 changed files with 54 additions and 6 deletions
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test/options.cpp
+19
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@@ -454,3 +454,22 @@ TEST_CASE("Booleans", "[boolean]") {
REQUIRE(result.count("others") == 1);
}
#ifdef CXXOPTS_HAS_OPTIONAL
TEST_CASE("std::optional", "[optional]") {
std::optional<std::string> optional;
cxxopts::Options options("optional", " - tests optional");
options.add_options()
("optional", "an optional option", cxxopts::value<std::optional<std::string>>(optional));
Argv av({"optional", "--optional", "foo"});
char** argv = av.argv();
auto argc = av.argc();
options.parse(argc, argv);
REQUIRE(optional.has_value());
CHECK(*optional == "foo");
}
#endif