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Closes #247

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This commit is contained in:
Pranav Srinivas Kumar 2023-10-27 12:34:57 -05:00
parent bf9642c51d
commit d28188f4d5
2 changed files with 56 additions and 0 deletions
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1
include/argparse/argparse.hpp
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@ -427,6 +427,7 @@ public:
}
template <typename T> Argument &default_value(T &&value) {
m_num_args_range = NArgsRange{0, m_num_args_range.get_max()};
m_default_value_repr = details::repr(value);
if constexpr (std::is_convertible_v<T, std::string_view>) {

55
test/test_default_value.cpp
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@ -23,3 +23,58 @@ TEST_CASE("Use a 'string' default value" * test_suite("default_value")) {
REQUIRE(program.get("--arg") == std::string("string object"));
}
}
TEST_CASE("Use a default value with flag arguments" * test_suite("default_value")) {
argparse::ArgumentParser program("test");
program.add_argument("-inc_chr", "--include_chromes")
.help(std::string{"only process the anchor whose one of the end is contained on the specified "
"chromatin, used ',' to split."})
.default_value("all");
program.add_argument("-l").default_value(false).implicit_value(true);
program.add_argument("-o").default_value(false).implicit_value(true);
program.add_argument("filename");
SUBCASE("Leading optional argument with default_value") {
REQUIRE_NOTHROW(program.parse_args({"test", "-inc_chr", "-lo", "my.log"}));
REQUIRE(program.get("-inc_chr") == std::string{"all"});
}
SUBCASE("Trailing optional argument with default_value") {
REQUIRE_NOTHROW(program.parse_args({"test", "-lo", "my.log", "-inc_chr"}));
REQUIRE(program.get("-inc_chr") == std::string{"all"});
}
}
TEST_CASE("Position of the argument with default value") {
argparse::ArgumentParser program("test");
program.add_argument("-g").default_value("the_default_value");
program.add_argument("-s");
SUBCASE("Arg with default value not passed") {
REQUIRE_NOTHROW(program.parse_args({"test", "-s", "./src"}));
REQUIRE(program.get("-g") == std::string("the_default_value"));
REQUIRE(program.get("-s") == std::string("./src"));
}
SUBCASE("Arg with default value passed last") {
REQUIRE_NOTHROW(program.parse_args({"test", "-s", "./src", "-g"}));
REQUIRE(program.get("-g") == std::string("the_default_value"));
REQUIRE(program.get("-s") == std::string("./src"));
}
SUBCASE("Arg with default value passed before last") {
REQUIRE_NOTHROW(program.parse_args({"test", "-g", "-s", "./src"}));
REQUIRE(program.get("-g") == std::string("the_default_value"));
REQUIRE(program.get("-s") == std::string("./src"));
}
SUBCASE("Arg with default value replaces the value if given") {
REQUIRE_NOTHROW(program.parse_args({"test", "-g", "a_different_value", "-s", "./src"}));
REQUIRE(program.get("-g") == std::string("a_different_value"));
REQUIRE(program.get("-s") == std::string("./src"));
}
}