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Construct Argument using template pack of names

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This commit is contained in:
Stephan van Veen 2019-05-08 23:14:27 +02:00
parent 8474147a7c
commit d9bff3dc2b
1 changed files with 15 additions and 29 deletions
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44
include/argparse.hpp
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@ -89,6 +89,12 @@ class Argument {
public: public:
Argument() = default; Argument() = default;
template <typename ...Args>
Argument(Args... args)
: mNames({std::move(args)...})
, mIsOptional((is_optional(args) || ...))
{}
Argument& help(const std::string& aHelp) { Argument& help(const std::string& aHelp) {
mHelp = aHelp; mHelp = aHelp;
return *this; return *this;
@ -163,6 +169,10 @@ public:
} }
private: private:
// If an argument starts with "-" or "--", then it's optional
static bool is_optional(const std::string& aName) {
return (starts_with(aName, "--") || starts_with(aName, "-"));
}
// Getter for template types other than std::vector and std::list // Getter for template types other than std::vector and std::list
template <typename T> template <typename T>
@ -289,17 +299,9 @@ class ArgumentParser {
// Parameter packing // Parameter packing
// Call add_argument with variadic number of string arguments // Call add_argument with variadic number of string arguments
// TODO: enforce T to be std::string template<typename... Targs>
template<typename T, typename... Targs> Argument& add_argument(Targs... Fargs) {
Argument& add_argument(T value, Targs... Fargs) { std::shared_ptr<Argument> tArgument = std::make_shared<Argument>(Fargs...);
std::shared_ptr<Argument> tArgument = std::make_shared<Argument>();
tArgument->mNames.push_back(value);
add_argument_internal(tArgument, Fargs...);
for (auto& mName : tArgument->mNames) {
if (is_optional(mName))
tArgument->mIsOptional = true;
}
if (!tArgument->mIsOptional) if (!tArgument->mIsOptional)
mPositionalArguments.push_back(tArgument); mPositionalArguments.push_back(tArgument);
@ -470,22 +472,6 @@ class ArgumentParser {
} }
private: private:
Argument& add_argument_internal(std::shared_ptr<Argument> aArgument) {
return *aArgument;
}
template<typename T, typename... Targs>
Argument& add_argument_internal(std::shared_ptr<Argument> aArgument, T aArgumentName, Targs... Fargs) {
aArgument->mNames.push_back(aArgumentName);
add_argument_internal(aArgument, Fargs...);
return *aArgument;
}
// If an argument starts with "-" or "--", then it's optional
bool is_optional(const std::string& aName) {
return (starts_with(aName, "--") || starts_with(aName, "-"));
}
// If the argument was defined by the user and can be found in mArgumentMap, then it's valid // If the argument was defined by the user and can be found in mArgumentMap, then it's valid
bool is_valid_argument(const std::string& aName) { bool is_valid_argument(const std::string& aName) {
std::map<std::string, std::shared_ptr<Argument>>::iterator tIterator = mArgumentMap.find(aName); std::map<std::string, std::shared_ptr<Argument>>::iterator tIterator = mArgumentMap.find(aName);
@ -546,7 +532,7 @@ class ArgumentParser {
} }
} }
else { else {
if (is_optional(argv[i])) { if (Argument::is_optional(argv[i])) {
// This is possibly a compound optional argument // This is possibly a compound optional argument
// Example: We have three optional arguments -a, -u and -x // Example: We have three optional arguments -a, -u and -x
// The user provides ./main -aux ... // The user provides ./main -aux ...
@ -596,7 +582,7 @@ class ArgumentParser {
auto tCount = tArgument->mNumArgs - tArgument->mRawValues.size(); auto tCount = tArgument->mNumArgs - tArgument->mRawValues.size();
while (tCount > 0) { while (tCount > 0) {
tIterator = mArgumentMap.find(argv[i]); tIterator = mArgumentMap.find(argv[i]);
if (tIterator != mArgumentMap.end() || is_optional(argv[i])) { if (tIterator != mArgumentMap.end() || Argument::is_optional(argv[i])) {
i = i - 1; i = i - 1;
break; break;
} }