ArgumentParser-class: Parser for command-line options and arguments
In Xmisc: Xiaobei's miscellaneous classes and functions

Description Fields Methods Author(s) Examples

Parser for command-line options and arguments

cmdargs: list
exeargs: character
args: list
types: list
defaults: list
helps: list
usage: character
description: character

add_argument(name, ..., type, default, required = FALSE, help = "", dest, action): Add an argument.
add_description(x): Add a description.
add_usage(x): Add a usage.
make_help(): Make and display ‘usage’.

Xiaobei Zhao

## Test
require(Xmisc)
parser <- ArgumentParser$new()
parser$add_argument('--a_str',type='character')
parser$add_argument('--b_num',type='numeric',default='0')
a_str
## character(0)
b_num
## [1] 0
message(parser$get_help())
## Usage:
##     /bin/exec/R ...
## Description:
## Options:
##     a_str character
##     b_num numeric   [ 0 ]

## Not run: 
## Test from a command line
R -q -e "
require(methods);require(Xmisc);
parser <- ArgumentParser\$new();
parser\$add_argument('--a_str',type='character');
parser\$add_argument('--b_num',type='numeric',default='0');
printme(a_str);printme(b_num);parser\$get_help();
" --args --a_str='Hello World!' --b_num=1
## Loading required package: Xmisc
## ## a_str ##
## [1] "Hello World!"
## ## b_num ##
## [1] 1
## ...

## End(Not run)