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A Command Line Parser

Home Page: http://d.hatena.ne.jp/tanakh/20091028

License: BSD 3-Clause "New" or "Revised" License

C 80.94% C++ 19.06%

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cmdline's Issues

MSVC confuse std::max with windows max macros

when i compiled cmdline in vs2016, i got the following error

1>cmdline.h(586) : error C2589: '(' : illegal token on right side of '::'
1>cmdline.h(586) : error C2143: syntax error : missing ';' before '::'

the solution is to use

max_width = (std::max)(max_width, (ordered[i]->name().length()));

to instead the line

max_width = std::max(max_width, (ordered[i]->name().length()));

this API parse_check(const string arg) not work

my example code is follow:
’‘’
cmdline::parser parser;
parser.add("loglevel", 'l', "0-critical, 1-err, 2-warn, 3-info, 4-debug, 5-trace", false, 1);
parser.parse_check("--loglevel");
auto t = parser.get("loglevel");
std::cout << "level:" << t << std::endl; // when set loglevel 5, but it always default value effect
auto log_level = (LogLevel)t;
std::cout << "log level: " << log_level <<std::endl;
InitLog(log_level);
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
‘’‘

I built a bin as "test", when I execute the command "./test --gtest_filter=*.test1 --loglevel 5",
but the loglevel is always set to be default value 1

please check this problem, thx

Can not support std::vector<std::string> ？

#include <iostream>
#include <vector>
#include "cmdline.h"

int main(int argc, char** argv) {
  cmdline::parser parser;

  parser.add<std::vector<std::string>>("topics", 't', "topics to filter", true);

  parser.parse(argc, argv);

  std::vector<std::string> topics = parser.get<std::vector<std::string>>("topics");

  std::cout << "Topics to filter:" << std::endl;
  for (const auto& topic : topics) {
    std::cout << "- " << topic << std::endl;
  }

  return 0;
}

this code is compile error，how to support for std::vectorstd::string？

Mysterious segfaults with cmdline with several arguments

cmdline appears to have some intrinsic limitation to the number of arguments it can process. I get

$ ./a.out 
Segmentation fault (core dumped)

with the following test program originating from HelFEM

#include "cmdline.h"
#include <vector>
#include <string>

int main(int argc, char **argv) {
  cmdline::parser parser;

  // full option name, no short option, description, argument required
  parser.add<std::string>("Z", 0, "nuclear charge", false, "H");
  parser.add<double>("Rmax", 0, "practical infinity in au", false, 40.0);
  parser.add<int>("grid", 0, "type of grid: 1 for linear, 2 for quadratic, 3 for polynomial, 4 for exponential", false, 4);
  parser.add<double>("zexp", 0, "parameter in radial grid", false, 2.0);
  parser.add<int>("nelem", 0, "number of elements", false, 5);
  parser.add<int>("Q", 0, "charge of system", false, 0);
  parser.add<int>("nnodes", 0, "number of nodes per element", false, 15);
  parser.add<int>("nquad", 0, "number of quadrature points", false, 0);
  parser.add<int>("maxit", 0, "maximum number of iterations", false, 500);
  parser.add<double>("convthr", 0, "convergence threshold", false, 1e-7);
  parser.add<std::string>("method", 0, "method to use", false, "lda_x");
  parser.add<double>("dftthr", 0, "density threshold for dft", false, 1e-12);
  parser.add<int>("restricted", 0, "spin-restricted orbitals", false, -1);
  parser.add<int>("primbas", 0, "primitive radial basis", false, 4);
  parser.add<double>("diiseps", 0, "when to start mixing in diis", false, 1e-2);
  parser.add<double>("diisthr", 0, "when to switch over fully to diis", false, 1e-3);
  parser.add<int>("diisorder", 0, "length of diis history", false, 5);
  parser.parse_check(argc, argv);

  // Get parameters
  double Rmax(parser.get<double>("Rmax"));
  int igrid(parser.get<int>("grid"));
  double zexp(parser.get<double>("zexp"));
  int maxit(parser.get<int>("maxit"));
  double convthr(parser.get<double>("convthr"));
  int restr(parser.get<int>("restricted"));
  int primbas(parser.get<int>("primbas"));
  // Number of elements
  int Nelem(parser.get<int>("nelem"));
  // Number of nodes
  int Nnodes(parser.get<int>("nnodes"));

  // Order of quadrature rule
  int Nquad(parser.get<int>("nquad"));
  double dftthr(parser.get<double>("dftthr"));

  // Nuclear charge
  std::string Z(parser.get<std::string>("Z"));
  int Q(parser.get<int>("Q"));
  double diiseps=parser.get<double>("diiseps");
  double diisthr=parser.get<double>("diisthr");
  int diisorder=parser.get<int>("diisorder");
  std::string method=parser.get<std::string>("method");
  
  std::vector<std::string> rcalc(2);
  rcalc[0]="unrestricted";
  rcalc[1]="restricted";

  printf("Running %s %s calculation with Rmax=%e and %i elements.\n",rcalc[restr].c_str(),method.c_str(),Rmax,Nelem);
  
  return 0;
}

The backtrace doesn't contain any useable information

(gdb) bt
#0  __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
#1  0x00007fdb436ba6de in __vfprintf_internal (s=0x7fdb43813780 <_IO_2_1_stdout_>, format=0x4103c8 "Running %s %s calculation with Rmax=%e and %i elements.\n", ap=ap@entry=0x7ffe86b3a540, 
    mode_flags=mode_flags@entry=0) at vfprintf-internal.c:1645
#2  0x00007fdb436a52df in __printf (format=<optimized out>) at printf.c:33
#3  0x0000000000404c48 in main ()

but the code works if you comment out a variable!

“cxxabi.h”: No such file or directory

use vs2019 build fail. output error :
fatal error C1083: 无法打开包括文件: “cxxabi.h”: No such file or directory

Is it possible to parse multi arguments under one flag?

e.g.
test --input-names Alice Bob BlaBla

and I want to get an array of std::string

Warning C4101 unreferenced local variable

Line 732 ->:

catch(const std::exception &e){
        return false;
      }

the parameter e is not used, thus MSVC may give a warning.

solution:

catch(const std::exception &e){
        std::cerr << "exception caught: " << e.what() << '\n';
        return false;
      }

Support for long description

It would be nice to be able to add a program description to usage. I mean this kind of output:

usage: ./test --host=string [options] ... 
options:
  -h, --host    host name (string)
  -p, --port    port number (int [=80])
  -t, --type    protocol type (string [=http])
      --gzip    gzip when transfer
  -?, --help    print this message
The program accepts on standard input newline-delimited string 
values denoting query arguments to be added to the output url. 
Example: 
  $ (echo a=1& echo b=2)| ./test --host=github.com -p 4545
  http://github.com:4545?a=1&b=2

I don't know whether is makes sense for Unix people, but it does on Windows.

How to handle multiple inputs within the same name？

cmdline state:

    run -m model.bin -i test_image000.raw test_image11111.raw test_image22222.raw -o result0 -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

    run -m model.bin -i test_image000.raw test_image11111.raw test_image22222.raw -o result0 result1 result2 result3 -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

    run -m model.bin -i test_image000.raw test_image11111.raw test_image22222.raw -o result0 -o result1 -o result2 -o result3 -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

    run -m model.bin -i test_image000.raw -i test_image11111.raw -i test_image22222.raw -o result -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

    run -m model.bin -i test_image000.raw -i test_image11111.raw -i test_image22222.raw -o result -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

    run -m model.bin -i test_image000.raw -i test_image11111.raw -i test_image22222.raw -o result0 -o result1 -o result2 -o result3 -a 0 -b 0 -c 0 -d 0 -e 0 -f n -g 0

How to handle this kind of situation？
By the way, I show multi types of format, Which format is suitable? thanks!

The lib does not parse an arg within quotes with a dash in them.

Given an argument (not option) such as "my-folder-name", i.e. within quotes with dashes within, the parser fails.

zsh does not support "-?"

Hello Tanakh,

When I enter ./a.out -?, the zsh tell me zsh: no matches found: -?

That make me think that -h is better than -?, so maybe it is a better idea to use -h as default help command. (as far as I know, many programme use -h but not -?)

Thank you.