KeqingMoe/argparse
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Simplify creating of help option

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This commit is contained in:
Stephan van Veen 2019-05-12 14:46:24 +02:00
parent ecf8286c9e
commit 84adf5b2df
1 changed files with 10 additions and 9 deletions
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19
include/argparse.hpp
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@ -291,6 +291,10 @@ public:
size_t mNumArgs = 1;
bool mIsOptional = false;
bool mIsUsed = false; // relevant for optional arguments. True if used by user
public:
static constexpr auto mHelpOption = "-h";
static constexpr auto mHelpOptionLong = "--help";
};
class ArgumentParser {
@ -298,14 +302,11 @@ class ArgumentParser {
explicit ArgumentParser(std::string aProgramName = {}) :
mProgramName(std::move(aProgramName))
{
std::shared_ptr<Argument> tArgument = std::make_shared<Argument>("-h", "--help");
tArgument->mHelp = "show this help message and exit";
tArgument->mNumArgs = 0;
tArgument->mDefaultValue = false;
tArgument->mImplicitValue = true;
mOptionalArguments.emplace_back(tArgument);
mArgumentMap.insert_or_assign(std::string("-h"), tArgument);
mArgumentMap.insert_or_assign(std::string("--help"), tArgument);
add_argument(Argument::mHelpOption, Argument::mHelpOptionLong)
.help("show this help message and exit")
.nargs(0)
.default_value(false)
.implicit_value(true);
}
// Parameter packing
@ -505,7 +506,7 @@ class ArgumentParser {
mProgramName = argv[0];
for (int i = 1; i < argc; i++) {
auto tCurrentArgument = std::string(argv[i]);
if (tCurrentArgument == "-h" || tCurrentArgument == "--help") {
if (tCurrentArgument == Argument::mHelpOption || tCurrentArgument == Argument::mHelpOptionLong) {
throw std::runtime_error("help called");
}
auto tIterator = mArgumentMap.find(argv[i]);