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simple_parseopt.html
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simple_parseopt.html
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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- This file is generated by Nim. -->
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- Favicon -->
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<!-- Google fonts -->
<link href='https://fonts.googleapis.com/css?family=Lato:400,600,900' rel='stylesheet' type='text/css'/>
<link href='https://fonts.googleapis.com/css?family=Source+Code+Pro:400,500,600' rel='stylesheet' type='text/css'/>
<!-- CSS -->
<title>simple_parseopt</title>
<style type="text/css" >
/*
Stylesheet for use with Docutils/rst2html.
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
customize this style sheet.
Modified from Chad Skeeters' rst2html-style
https://bitbucket.org/cskeeters/rst2html-style/
Modified by Boyd Greenfield and narimiran
*/
html {
font-size: 100%;
-webkit-text-size-adjust: 100%;
-ms-text-size-adjust: 100%; }
body {
font-family: "Lato", "Helvetica Neue", "HelveticaNeue", Helvetica, Arial, sans-serif;
font-weight: 400;
font-size: 1.125em;
line-height: 1.5;
color: #222;
background-color: #FCFCFC; }
/* Skeleton grid */
.container {
position: relative;
width: 100%;
max-width: 1050px;
margin: 0 auto;
padding: 0;
box-sizing: border-box; }
.column,
.columns {
width: 100%;
float: left;
box-sizing: border-box;
margin-left: 1%;
}
.column:first-child,
.columns:first-child {
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.three.columns {
width: 19%; }
.nine.columns {
width: 80.0%; }
.twelve.columns {
width: 100%;
margin-left: 0; }
@media screen and (max-width: 860px) {
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}
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}
body {
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}
}
cite {
font-style: italic !important; }
/* Nim search input */
div#searchInputDiv {
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}
input#searchInput {
width: 80%;
}
/*
* Some custom formatting for input forms.
* This also fixes input form colors on Firefox with a dark system theme on Linux.
*/
input {
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border: 1px solid #aaa;
font-family: "Lato", "Helvetica Neue", "HelveticaNeue", Helvetica, Arial, sans-serif;
font-size: 0.9em;
padding: 6px;
}
input:focus {
border: 1px solid #1fa0eb;
box-shadow: 0 0 2px #1fa0eb;
}
/* Docgen styles */
/* Links */
a {
color: #07b;
text-decoration: none;
}
a span.Identifier {
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text-decoration-color: #aab;
}
a.reference-toplevel {
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}
a.toc-backref {
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font-size: 0.9em;
font-style: italic; }
a:hover,
a:focus {
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text-decoration: underline; }
a:hover span.Identifier {
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}
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sup {
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font-size: 75%;
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vertical-align: baseline; }
sup {
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sub {
bottom: -0.25em; }
img {
width: auto;
height: auto;
max-width: 100%;
vertical-align: middle;
border: 0;
-ms-interpolation-mode: bicubic; }
@media print {
* {
color: black !important;
text-shadow: none !important;
background: transparent !important;
box-shadow: none !important; }
a,
a:visited {
text-decoration: underline; }
a[href]:after {
content: " (" attr(href) ")"; }
abbr[title]:after {
content: " (" attr(title) ")"; }
.ir a:after,
a[href^="javascript:"]:after,
a[href^="#"]:after {
content: ""; }
pre,
blockquote {
border: 1px solid #999;
page-break-inside: avoid; }
thead {
display: table-header-group; }
tr,
img {
page-break-inside: avoid; }
img {
max-width: 100% !important; }
@page {
margin: 0.5cm; }
h1 {
page-break-before: always; }
h1.title {
page-break-before: avoid; }
p,
h2,
h3 {
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h2,
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}
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}
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}
em {
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h1 {
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font-weight: 400;
padding-bottom: .25em;
border-bottom: 1px solid #aaa;
margin-top: 2.5em;
margin-bottom: 1em;
line-height: 1.2em; }
h1.title {
padding-bottom: 1em;
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font-weight: 900;
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}
h2 {
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ul,
ol {
padding: 0;
margin-top: 0.5em;
margin-left: 0.75em; }
ul ul,
ul ol,
ol ol,
ol ul {
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margin-left: 1.25em; }
li {
list-style-type: circle;
}
ul.simple-boot li {
list-style-type: none;
margin-left: 0em;
margin-bottom: 0.5em;
}
ol.simple > li, ul.simple > li {
margin-bottom: 0.25em;
margin-left: 0.4em }
ul.simple.simple-toc > li {
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}
ul.simple-toc {
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font-size: 0.9em;
margin-left: -0.3em;
margin-top: 1em; }
ul.simple-toc > li {
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}
ul.simple-toc-section {
list-style-type: circle;
margin-left: 1em;
color: #6c9aae; }
ol.arabic {
list-style: decimal; }
ol.loweralpha {
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ol.upperalpha {
list-style: upper-alpha; }
ol.lowerroman {
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ol.upperroman {
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ul.auto-toc {
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dl {
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dt {
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dd {
margin-left: 2.0em;
margin-bottom: 3.0em;
margin-top: 0.5em; }
hr {
margin: 2em 0;
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blockquote {
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}
.pre {
font-family: "Source Code Pro", Monaco, Menlo, Consolas, "Courier New", monospace;
font-weight: 500;
font-size: 0.85em;
background-color: #f0f3ff;
padding-left: 3px;
padding-right: 3px;
border-radius: 4px;
}
pre {
font-family: "Source Code Pro", Monaco, Menlo, Consolas, "Courier New", monospace;
color: #222;
font-weight: 500;
display: inline-block;
box-sizing: border-box;
min-width: 100%;
padding: 0.5em;
margin-top: 0.5em;
margin-bottom: 0.5em;
font-size: 0.85em;
white-space: pre !important;
overflow-y: hidden;
overflow-x: visible;
background-color: ghostwhite;
border: 1px solid #dde;
-webkit-border-radius: 6px;
-moz-border-radius: 6px;
border-radius: 6px; }
.pre-scrollable {
max-height: 340px;
overflow-y: scroll; }
/* Nim line-numbered tables */
.line-nums-table {
width: 100%;
table-layout: fixed; }
table.line-nums-table {
border-radius: 4px;
border: 1px solid #cccccc;
background-color: ghostwhite;
border-collapse: separate;
margin-top: 15px;
margin-bottom: 25px; }
.line-nums-table tbody {
border: none; }
.line-nums-table td pre {
border: none;
background-color: transparent; }
.line-nums-table td.blob-line-nums {
width: 28px; }
.line-nums-table td.blob-line-nums pre {
color: #b0b0b0;
-webkit-filter: opacity(75%);
text-align: right;
border-color: transparent;
background-color: transparent;
padding-left: 0px;
margin-left: 0px;
padding-right: 0px;
margin-right: 0px; }
table {
max-width: 100%;
background-color: transparent;
margin-top: 0.5em;
margin-bottom: 1.5em;
border-collapse: collapse;
border-color: #ccc;
border-spacing: 0;
font-size: 0.9em;
}
table th, table td {
padding: 0px 0.5em 0px;
}
table th {
background-color: #e8e8e8;
font-weight: bold; }
table th.docinfo-name {
background-color: transparent;
}
table tr:hover {
background-color: ghostwhite; }
/* rst2html default used to remove borders from tables and images */
.borderless, table.borderless td, table.borderless th {
border: 0; }
table.borderless td, table.borderless th {
/* Override padding for "table.docutils td" with "! important".
The right padding separates the table cells. */
padding: 0 0.5em 0 0 !important; }
.first {
/* Override more specific margin styles with "! important". */
margin-top: 0 !important; }
.last, .with-subtitle {
margin-bottom: 0 !important; }
.hidden {
display: none; }
blockquote.epigraph {
margin: 2em 5em; }
dl.docutils dd {
margin-bottom: 0.5em; }
object[type="image/svg+xml"], object[type="application/x-shockwave-flash"] {
overflow: hidden; }
div.figure {
margin-left: 2em;
margin-right: 2em; }
div.footer, div.header {
clear: both;
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color: #666;
font-size: smaller; }
div.footer {
padding-top: 5em;
}
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div.line-block div.line-block {
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margin-bottom: 0;
margin-left: 1.5em; }
div.topic {
margin: 2em; }
div.search_results {
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margin: 3em;
padding: 1em;
border: 1px solid #4d4d4d;
}
div#global-links ul {
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list-style-type: none;
}
div#global-links > simple-boot {
margin-left: 3em;
}
hr.docutils {
width: 75%; }
img.align-left, .figure.align-left, object.align-left {
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float: left;
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img.align-right, .figure.align-right, object.align-right {
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float: right;
margin-left: 1em; }
img.align-center, .figure.align-center, object.align-center {
display: block;
margin-left: auto;
margin-right: auto; }
.align-left {
text-align: left; }
.align-center {
clear: both;
text-align: center; }
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text-align: right; }
/* reset inner alignment in figures */
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p.attribution {
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margin-left: 50%; }
p.caption {
font-style: italic; }
p.credits {
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<h1 class="title">simple_parseopt</h1>
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<ul class="simple">
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onkeyup="search()" />
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Group by:
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<ul class="simple simple-toc" id="toc-list">
<ul class="simple"><li><a class="reference" id="basic-use_toc" href="#basic-use">Basic Use</a></li>
<li><a class="reference" id="default-commandminusline-syntax_toc" href="#default-commandminusline-syntax">Default command-line syntax</a></li>
<li><a class="reference" id="extra-parameter-infocolon-pragmas_toc" href="#extra-parameter-infocolon-pragmas">Extra Parameter Info: Pragmas</a></li>
<li><a class="reference" id="settings_toc" href="#settings">Settings</a></li>
</ul><li>
<a class="reference reference-toplevel" href="#12" id="62">Procs</a>
<ul class="simple simple-toc-section">
<li><a class="reference" href="#no_dash"
title="no_dash()"><wbr />no_<wbr />dash<span class="attachedType"></span></a></li>
<li><a class="reference" href="#no_slash"
title="no_slash()"><wbr />no_<wbr />slash<span class="attachedType"></span></a></li>
<li><a class="reference" href="#dash_dash_parameters"
title="dash_dash_parameters()"><wbr />dash_<wbr />dash_<wbr />parameters<span class="attachedType"></span></a></li>
<li><a class="reference" href="#dash_dash_separator"
title="dash_dash_separator()"><wbr />dash_<wbr />dash_<wbr />separator<span class="attachedType"></span></a></li>
<li><a class="reference" href="#value_after_colon"
title="value_after_colon()"><wbr />value_<wbr />after_<wbr />colon<span class="attachedType"></span></a></li>
<li><a class="reference" href="#value_after_equals"
title="value_after_equals()"><wbr />value_<wbr />after_<wbr />equals<span class="attachedType"></span></a></li>
<li><a class="reference" href="#allow_repetition"
title="allow_repetition()"><wbr />allow_<wbr />repetition<span class="attachedType"></span></a></li>
<li><a class="reference" href="#allow_errors"
title="allow_errors()"><wbr />allow_<wbr />errors<span class="attachedType"></span></a></li>
<li><a class="reference" href="#no_implicit_bare"
title="no_implicit_bare()"><wbr />no_<wbr />implicit_<wbr />bare<span class="attachedType"></span></a></li>
<li><a class="reference" href="#can_name_bare"
title="can_name_bare()"><wbr />can_<wbr />name_<wbr />bare<span class="attachedType"></span></a></li>
<li><a class="reference" href="#manual_help"
title="manual_help()"><wbr />manual_<wbr />help<span class="attachedType"></span></a></li>
<li><a class="reference" href="#command_name%2Cstring"
title="command_name(name: string)"><wbr />command_<wbr />name<span class="attachedType"></span></a></li>
<li><a class="reference" href="#help_text%2Cstring%2Cstring"
title="help_text(text, footer = "")"><wbr />help_<wbr />text<span class="attachedType"></span></a></li>
</ul>
</li>
<li>
<a class="reference reference-toplevel" href="#17" id="67">Macros</a>
<ul class="simple simple-toc-section">
<li><a class="reference" href="#config.m%2Cuntyped"
title="config(body: untyped): untyped"><wbr />config<span class="attachedType"></span></a></li>
<li><a class="reference" href="#get_options_and_supplied.m%2Cuntyped"
title="get_options_and_supplied(body: untyped): untyped"><wbr />get_<wbr />options_<wbr />and_<wbr />supplied<span class="attachedType"></span></a></li>
<li><a class="reference" href="#get_options.m%2Cuntyped"
title="get_options(body: untyped): untyped"><wbr />get_<wbr />options<span class="attachedType"></span></a></li>
</ul>
</li>
</ul>
</div>
<div class="nine columns" id="content">
<div id="tocRoot"></div>
<p class="module-desc">Nim module which provides clean, zero-effort command line parsing.
<h2><a class="toc-backref" id="basic-use" href="#basic-use">Basic Use</a></h2><p>This module gives you two ways to parse the command line: <tt class="docutils literal"><span class="pre">get_options</span></tt> and <tt class="docutils literal"><span class="pre">get_options_and_supplied</span></tt></p>
<p><strong>get_options</strong></p>
<p>At its simplest, declare a block like this:</p>
<p><pre class="listing"><span class="Comment"># foo.nim</span>
<span class="Keyword">let</span> <span class="Identifier">options</span> <span class="Operator">=</span> <span class="Identifier">get_options</span><span class="Punctuation">:</span>
<span class="Identifier">name</span> <span class="Operator">=</span> <span class="StringLit">"Default Name"</span>
<span class="Identifier">active</span> <span class="Operator">=</span> <span class="Identifier">false</span>
<span class="Identifier">letter_one</span> <span class="Operator">=</span> <span class="CharLit">'a'</span>
<span class="Identifier">age</span> <span class="Operator">=</span> <span class="DecNumber">1</span>
<span class="Identifier">hello</span><span class="Punctuation">:</span><span class="Identifier">string</span>
<span class="Identifier">big</span><span class="Punctuation">:</span><span class="Identifier">float64</span> <span class="Operator">=</span> <span class="FloatNumber">1.1</span>
<span class="Identifier">small</span><span class="Punctuation">:</span><span class="Identifier">float</span> <span class="Operator">=</span> <span class="FloatNumber">2.2</span>
<span class="Identifier">flat</span><span class="Punctuation">:</span><span class="Identifier">uint</span> <span class="Operator">=</span> <span class="DecNumber">2</span>
<span class="Identifier">arguments</span><span class="Punctuation">:</span><span class="Identifier">seq</span><span class="Punctuation">[</span><span class="Identifier">string</span><span class="Punctuation">]</span>
<span class="Identifier">echo</span> <span class="Identifier">options</span><span class="Operator">.</span><span class="Identifier">name</span> <span class="Operator">&</span> <span class="StringLit">" is "</span> <span class="Operator">&</span> <span class="Identifier">options</span><span class="Operator">.</span><span class="Identifier">age</span><span class="Operator">.</span><span class="Identifier">repr</span> <span class="Operator">&</span> <span class="StringLit">" years old!"</span>
</pre></p>
<p>Notice it follows the same syntax as a <tt class="docutils literal"><span class="pre">var</span></tt> block.</p>
<p>In the example <tt class="docutils literal"><span class="pre">foo.nim</span></tt> above, the variable <tt class="docutils literal"><span class="pre">options</span></tt> will be set to an <tt class="docutils literal"><span class="pre">object</span></tt> with fields as described in the <tt class="docutils literal"><span class="pre">get_options</span></tt> block. Each field will also be set up as a command-line parameter for the user running the program to use; bools will toggle, while other fields will take a value argument.</p>
<p><pre class="listing">
foo -name "J. Random" -active -big 1011121.121498 -letter-one z
</pre></p>
<p>This will set the <tt class="docutils literal"><span class="pre">name</span></tt> <tt class="docutils literal"><span class="pre">string</span></tt> to <tt class="docutils literal"><span class="pre">"J. Random"</span></tt>, toggle the <tt class="docutils literal"><span class="pre">active</span></tt> <tt class="docutils literal"><span class="pre">bool</span></tt> to <tt class="docutils literal"><span class="pre">true</span></tt>, set the <tt class="docutils literal"><span class="pre">big</span></tt> <tt class="docutils literal"><span class="pre">float64</span></tt> to <tt class="docutils literal"><span class="pre">1011121.121498</span></tt>, and set <tt class="docutils literal"><span class="pre">letter_one</span></tt> to <tt class="docutils literal"><span class="pre">z</span></tt> (notice the underscore in the field becomes a hyphen at the command line).</p>
<p>You may use any basic type: <tt class="docutils literal"><span class="pre">bool</span></tt>, <tt class="docutils literal"><span class="pre">string</span></tt>, <tt class="docutils literal"><span class="pre">int</span></tt>, <tt class="docutils literal"><span class="pre">float</span></tt>, <tt class="docutils literal"><span class="pre">uint</span></tt>, <tt class="docutils literal"><span class="pre">char</span></tt>, and the sized variants thereof, as well as <tt class="docutils literal"><span class="pre">seq`s of those types: `seq[string]</span></tt>, <tt class="docutils literal"><span class="pre">seq[int]</span></tt>, <tt class="docutils literal"><span class="pre">seq[float]</span></tt>, etc. (You may not use <tt class="docutils literal"><span class="pre">seq[bool]</span></tt>)</p>
<p>The last <tt class="docutils literal"><span class="pre">seq[string]</span></tt> will automatically be used to store any arguments set without a parameter name (you can disable this behaviour with <tt class="docutils literal"><span class="pre">no_implicit_bare()</span></tt>)</p>
<p><em>Details</em></p>
<p>The code above will translate into the equivalent of:</p>
<p><pre class="listing"><span class="Keyword">type</span> <span class="Identifier">Options</span> <span class="Operator">=</span> <span class="Keyword">object</span>
<span class="Identifier">name</span><span class="Punctuation">:</span><span class="Identifier">string</span>
<span class="Identifier">active</span><span class="Punctuation">:</span><span class="Identifier">bool</span>
<span class="Identifier">letter_one</span><span class="Punctuation">:</span><span class="Identifier">char</span>
<span class="Identifier">age</span><span class="Punctuation">:</span><span class="Identifier">int</span>
<span class="Identifier">hello</span><span class="Punctuation">:</span><span class="Identifier">string</span>
<span class="Identifier">big</span><span class="Punctuation">:</span><span class="Identifier">float64</span>
<span class="Identifier">small</span><span class="Punctuation">:</span><span class="Identifier">float</span>
<span class="Identifier">flat</span><span class="Punctuation">:</span><span class="Identifier">uint</span>
<span class="Identifier">arguments</span><span class="Punctuation">:</span><span class="Identifier">seq</span><span class="Punctuation">[</span><span class="Identifier">string</span><span class="Punctuation">]</span>
<span class="Identifier">options</span> <span class="Operator">=</span> <span class="Identifier">Options</span><span class="Punctuation">(</span><span class="Identifier">name</span><span class="Punctuation">:</span> <span class="StringLit">"Default Name"</span><span class="Punctuation">,</span> <span class="Identifier">active</span><span class="Punctuation">:</span> <span class="Identifier">false</span><span class="Punctuation">,</span> <span class="Identifier">letter_one</span><span class="Punctuation">:</span> <span class="CharLit">'a'</span><span class="Punctuation">,</span> <span class="Identifier">age</span><span class="Punctuation">:</span> <span class="DecNumber">1</span><span class="Punctuation">,</span> <span class="Identifier">big</span><span class="Punctuation">:</span> <span class="FloatNumber">1.1</span><span class="Punctuation">,</span> <span class="Identifier">small</span><span class="Punctuation">:</span> <span class="FloatNumber">2.2</span><span class="Punctuation">,</span> <span class="Identifier">flat</span><span class="Punctuation">:</span> <span class="DecNumber">2</span><span class="Punctuation">)</span>
<span class="Identifier">parse_command_line_into</span><span class="Punctuation">(</span><span class="Identifier">options</span><span class="Punctuation">)</span>
</pre></p>
<p>Where <tt class="docutils literal"><span class="pre">parse_command_line_into</span></tt> is some hypothetical procedure which parses the user-supplied command line and sets fields in <tt class="docutils literal"><span class="pre">options</span></tt> appropriately.</p>
<p><strong>get_options_and_supplied</strong></p>
<p>Using a <tt class="docutils literal"><span class="pre">get_options_and_supplied</span></tt> block will behave just like <tt class="docutils literal"><span class="pre">get_options</span></tt>, except it will return a tuple of two objects. The first is as detailed above. The second object will have identical field names, but all its fields will be of type <tt class="docutils literal"><span class="pre">bool</span></tt>.</p>
<p>Any field which the user has supplied on the command line will have its <tt class="docutils literal"><span class="pre">bool</span></tt> in the second object set to <tt class="docutils literal"><span class="pre">true</span></tt>.</p>
<p><pre class="listing"><span class="Comment"># foo.nim</span>
<span class="Keyword">let</span> <span class="Punctuation">(</span><span class="Identifier">options</span><span class="Punctuation">,</span> <span class="Identifier">supplied</span><span class="Punctuation">)</span> <span class="Operator">=</span> <span class="Identifier">get_options_and_supplied</span><span class="Punctuation">:</span>
<span class="Identifier">name</span> <span class="Operator">=</span> <span class="StringLit">"Default Name"</span>
<span class="Identifier">active</span> <span class="Operator">=</span> <span class="Identifier">false</span>
<span class="Identifier">letter</span> <span class="Operator">=</span> <span class="CharLit">'a'</span>
<span class="Identifier">age</span> <span class="Operator">=</span> <span class="DecNumber">1</span>
<span class="Identifier">big</span><span class="Punctuation">:</span><span class="Identifier">float64</span> <span class="Operator">=</span> <span class="FloatNumber">1.1</span>
<span class="Identifier">small</span><span class="Punctuation">:</span><span class="Identifier">float</span> <span class="Operator">=</span> <span class="FloatNumber">2.2</span>
<span class="Identifier">flat</span><span class="Punctuation">:</span><span class="Identifier">uint</span> <span class="Operator">=</span> <span class="DecNumber">2</span>
<span class="Identifier">hello</span><span class="Punctuation">:</span><span class="Identifier">string</span>
<span class="Keyword">if</span> <span class="Identifier">supplied</span><span class="Operator">.</span><span class="Identifier">name</span> <span class="Keyword">and</span> <span class="Identifier">supplied</span><span class="Operator">.</span><span class="Identifier">age</span><span class="Punctuation">:</span>
<span class="Identifier">echo</span> <span class="Identifier">options</span><span class="Operator">.</span><span class="Identifier">name</span> <span class="Operator">&</span> <span class="StringLit">" is "</span> <span class="Operator">&</span> <span class="Identifier">options</span><span class="Operator">.</span><span class="Identifier">age</span><span class="Operator">.</span><span class="Identifier">repr</span> <span class="Operator">&</span> <span class="StringLit">" years old!"</span>
</pre></p>
<h2><a class="toc-backref" id="default-commandminusline-syntax" href="#default-commandminusline-syntax">Default command-line syntax</a></h2><p>By default, each named parameter may be set on the command line by the user prefixing it with a <tt class="docutils literal"><span class="pre">-</span></tt> or a <tt class="docutils literal"><span class="pre">/</span></tt>. For <tt class="docutils literal"><span class="pre">bool</span></tt> fields, this will toggle the field. For other fields, the next argument on the command line is used to set the field.</p>
<p>All of these will work:</p>
<p><pre class="listing">
foo -name "Joe Random" -active
foo /active /flat 100
foo /hello Greetings! -big 100 /small 20
</pre></p>
<h2><a class="toc-backref" id="extra-parameter-infocolon-pragmas" href="#extra-parameter-infocolon-pragmas">Extra Parameter Info: Pragmas</a></h2><p>You may also add pragmas to the end of any line to modify parameter behaviour. Each pragma has a more verbose alias, if you prefer that style of code.</p>
<ul class="simple"><li><tt class="docutils literal"><span class="pre">{. info("text") .}</span></tt> <em>or</em> <tt class="docutils literal"><span class="pre">{. description("text") .}</span></tt><blockquote><p>Description of the parameter which will be shown in help text.</p></blockquote>
</li>
</ul>
<ul class="simple"><li><tt class="docutils literal"><span class="pre">{. aka("a", "b", ...) .}</span></tt> <em>or</em> <tt class="docutils literal"><span class="pre">{. alias("a", "b", ...) .}</span></tt><blockquote><p>Aliases for the parameter - user may use these as parameters; they will write to the field.</p></blockquote>
</li>
</ul>
<ul class="simple"><li><tt class="docutils literal"><span class="pre">{. bare .}</span></tt> <em>or</em> <tt class="docutils literal"><span class="pre">{. positional .}</span></tt><blockquote><p>Accepts a bare, positional argument (an argument which has not been prefixed with a parameter name). User will not be able to refer to the argument with its parameter name.</p></blockquote>
</li>
</ul>
<ul class="simple"><li><tt class="docutils literal"><span class="pre">{. need .}</span></tt> <em>or</em> <tt class="docutils literal"><span class="pre">.{ required .}</span></tt><blockquote><p>Parameter must be supplied by user or an error is shown.</p></blockquote>
</li>
</ul>
<ul class="simple"><li><tt class="docutils literal"><span class="pre">{. len(i) .}</span></tt> <em>or</em> <tt class="docutils literal"><span class="pre">.{ count(i) .}</span></tt><blockquote><p><p>Place on a <tt class="docutils literal"><span class="pre">seq</span></tt> field to require that many values be supplied to it. For example:</p>
<p><tt class="docutils literal"><span class="pre">position:seq[float] {. len(3) .} # x y z</span></tt></p>
<p>Note that this does not set a limit on the total length of the <tt class="docutils literal"><span class="pre">seq</span></tt>, only on how many values the user must specify. Using <tt class="docutils literal"><span class="pre">len</span></tt> in conjunction with the <tt class="docutils literal"><span class="pre">allow_repetition</span></tt> setting, you can accept multiple batches of values (see <tt class="docutils literal"><span class="pre">normalize.nim</span></tt> example)</p>
</p></blockquote>
</li>
</ul>
<h2><a class="toc-backref" id="settings" href="#settings">Settings</a></h2><p>You may tailor the parser with the following calls:</p>
<ul class="simple"><li><strong>no_dash()</strong><blockquote><p>Disable parameter being identified by prefixing with <tt class="docutils literal"><span class="pre">-</span></tt></p></blockquote>
</li>
</ul>
<ul class="simple"><li><strong>no_slash()</strong><blockquote><p>Disable parameter being identified by prefixing with <tt class="docutils literal"><span class="pre">/</span></tt></p></blockquote>
</li>
</ul>
<ul class="simple"><li><strong>dash_dash_parameters()</strong><blockquote><p>Require that parameters which have more than one character in their name be prefixed with <tt class="docutils literal"><span class="pre">--</span></tt> instead of <tt class="docutils literal"><span class="pre">-</span></tt>. Single-character parameters may then be entered grouped together under one <tt class="docutils literal"><span class="pre">-</span></tt></p></blockquote>
</li>
<li><strong>dash_dash_separator()</strong><blockquote><p><tt class="docutils literal"><span class="pre">--</span></tt> on its own in the command line will disable parameter names on every argument after it; they will all be treated as bare</p></blockquote>
</li>
<li><strong>value_after_colon()</strong><blockquote><p><p>Allow the user to specify parameter & value together, separated by a <tt class="docutils literal"><span class="pre">:</span></tt></p>
<p>e.g. <tt class="docutils literal"><span class="pre">-param:value</span></tt></p>
<p>Note this will not play nicely with quoted string values.</p>
</p></blockquote>
</li>
<li><strong>value_after_equals()</strong><blockquote><p><p>Allow the user to specify parameter & value together, separated by a <tt class="docutils literal"><span class="pre">=</span></tt></p>
<p>e.g. <tt class="docutils literal"><span class="pre">-param=value</span></tt></p>
<p>Note this will not play nicely with quoted string values.</p>
</p></blockquote>
</li>
<li><strong>allow_repetition()</strong><blockquote><p>Allow the user to specify the same parameter more than once without reporting an error.</p></blockquote>
</li>
<li><strong>allow_errors()</strong><blockquote><p>Allow program execution to continue after erroneous input.</p></blockquote>
</li>
<li><strong>no_implicit_bare()</strong><blockquote><p>Do not automatically use the last <tt class="docutils literal"><span class="pre">seq[string]</span></tt> parameter to gather any bare parameters the user enters (they become erroneous instead)</p></blockquote>
</li>
<li><strong>can_name_bare()</strong><blockquote><p>Allows user to set bare parameters by name.</p></blockquote>