38 lines
No EOL
2.1 KiB
HTML
38 lines
No EOL
2.1 KiB
HTML
<!doctype html>
|
||
<html lang="en">
|
||
<head>
|
||
<meta charset="utf-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||
<title>file_stderr — Ludic</title>
|
||
<meta name="description" content="The standard-error stream handle for use with file_write.">
|
||
<link rel="stylesheet" href="base.css">
|
||
<link rel="stylesheet" href="docs.css">
|
||
</head>
|
||
<body>
|
||
<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
|
||
<main class="wrap item">
|
||
<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="api.html#builtins">Builtin functions</a> <span>›</span> <span class="here">file_stderr</span></div>
|
||
<div class="item-head">
|
||
<span class="kind-badge kind-builtin">function</span>
|
||
<h1 id="top">file_stderr</h1>
|
||
</div>
|
||
<code class="sig">file_stderr() -> pointer</code>
|
||
<div class="desc"><p>Returns the handle for the standard-error stream, which you pass to <code>file_write</code> to emit raw bytes. Writing diagnostics and error messages here keeps them separate from normal program output on standard out, so a tool's real results are not mixed with its warnings. It takes no arguments and always refers to the process's standard error. Use it for the error side of command-line tools written in Ludic.</p></div>
|
||
|
||
<div class="examples"><h2>Example</h2><pre data-lang="ludic">program WarnToStderr {
|
||
handler CheckArgs phase Start {
|
||
if arg_count() < 2 {
|
||
let err = file_stderr()
|
||
let message = "missing argument\n"
|
||
file_write(err, message, len(message))
|
||
exit(1)
|
||
}
|
||
print("ok")
|
||
}
|
||
}</pre></div>
|
||
|
||
<a class="back" href="api.html">← All symbols</a>
|
||
</main>
|
||
<script src="ludic-highlight.js"></script>
|
||
<script>Ludic.highlightAll(); Ludic.installCards(); Ludic.flashTarget();</script>
|
||
</body></html> |