KeqingMoe/argparse
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Throw std::runtime_error instead of calling exit(0)

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This commit is contained in:
Stephan van Veen 2019-05-11 11:23:44 +02:00
parent 94e4458641
commit a0fa02503e
1 changed files with 22 additions and 8 deletions
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30
include/argparse.hpp
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@ -39,6 +39,7 @@ SOFTWARE.
#include <type_traits>
#include <algorithm>
#include <sstream>
#include <stdexcept>
namespace argparse {
@ -321,15 +322,19 @@ class ArgumentParser {
add_parents(Fargs...);
}
// Call parse_args_internal - which does all the work
// Then, validate the parsed arguments
// This variant is used mainly for testing
/* Call parse_args_internal - which does all the work
* Then, validate the parsed arguments
* This variant is used mainly for testing
* @throws std::runtime_error in case of any invalid argument
*/
void parse_args(const std::vector<std::string>& aArguments) {
parse_args_internal(aArguments);
parse_args_validate();
}
// Main entry point for parsing command-line arguments using this ArgumentParser
/* Main entry point for parsing command-line arguments using this ArgumentParser
* @throws std::runtime_error in case of any invalid argument
*/
void parse_args(int argc, char * argv[]) {
parse_args_internal(argc, argv);
parse_args_validate();
@ -458,6 +463,9 @@ class ArgumentParser {
return (tIterator != mArgumentMap.end());
}
/*
* @throws std::runtime_error in case of any invalid argument
*/
void parse_args_internal(const std::vector<std::string>& aArguments) {
std::vector<char*> argv;
for (const auto& arg : aArguments)
@ -466,6 +474,9 @@ class ArgumentParser {
return parse_args_internal(int(argv.size()) - 1, argv.data());
}
/*
* @throws std::runtime_error in case of any invalid argument
*/
void parse_args_internal(int argc, char * argv[]) {
if (mProgramName.empty() && argc > 0)
mProgramName = argv[0];
@ -473,7 +484,7 @@ class ArgumentParser {
auto tCurrentArgument = std::string(argv[i]);
if (tCurrentArgument == "-h" || tCurrentArgument == "--help") {
print_help();
exit(0);
throw std::runtime_error("help called");
}
auto tIterator = mArgumentMap.find(argv[i]);
if (tIterator != mArgumentMap.end()) {
@ -555,7 +566,7 @@ class ArgumentParser {
if (mNextPositionalArgument >= mPositionalArguments.size()) {
std::cout << "error: unexpected positional argument " << argv[i] << std::endl;
print_help();
exit(0);
throw std::runtime_error("unexpected positional argument");
}
auto tArgument = mPositionalArguments[mNextPositionalArgument];
auto tCount = tArgument->mNumArgs - tArgument->mRawValues.size();
@ -587,6 +598,9 @@ class ArgumentParser {
}
}
/*
* @throws std::runtime_error in case of any invalid argument
*/
void parse_args_validate() {
// Check if all positional arguments are parsed
for (const auto& tArgument : mPositionalArguments) {
@ -595,7 +609,7 @@ class ArgumentParser {
<< tArgument->mNumArgs << (tArgument->mNumArgs == 1 ? " argument. " : " arguments. ")
<< tArgument->mValues.size() << " provided.\n" << std::endl;
print_help();
exit(0);
throw std::runtime_error("wrong number of arguments");
}
}
@ -610,7 +624,7 @@ class ArgumentParser {
<< tArgument->mNumArgs << (tArgument->mNumArgs == 1 ? " argument. " : " arguments. ")
<< tArgument->mValues.size() << " provided.\n" << std::endl;
print_help();
exit(0);
throw std::runtime_error("wrong number of arguments");
}
}
}