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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE comref SYSTEM "comref.dtd">
<comref>
<header>
<copyright>
<year>1998</year><year>2013</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
</legalnotice>
<title>werl</title>
<prepared>Björn Gustavsson</prepared>
<responsible>Bjarne Däcker</responsible>
<docno>1</docno>
<approved>Bjarne Däcker</approved>
<checked></checked>
<date>98-01-26</date>
<rev>A</rev>
<file>werl.xml</file>
</header>
<com>werl</com>
<comsummary>The Erlang Emulator</comsummary>
<description>
<p>On Windows, the preferred way to start the Erlang system for interactive use is:</p>
<p><c><![CDATA[werl <arguments>]]></c></p>
<p>This will start Erlang in its own window, with fully
functioning command-line editing and scrollbars. All flags
except <c><![CDATA[-oldshell]]></c> work as they do for
the <seealso marker="erl">erl</seealso> command.</p>
<p>Ctrl-C is reserved for copying text to the clipboard (Ctrl-V to paste).
To interrupt the runtime system or the shell process (depending on what
has been specified with the +B system flag), you should use Ctrl-Break.</p>
<p>In cases where you want to redirect standard input and/or
standard output or use Erlang in a pipeline, the <c>werl</c> is
not suitable, and the <c>erl</c> program should be used instead.</p>
<p>The <c>werl</c> window is in many ways modelled after the <c>xterm</c>
window present on other platforms, as the <c>xterm</c> model
fits well with line oriented command based interaction. This
means that selecting text is line oriented rather than rectangle
oriented.</p>
<p>To select text in the <c>werl</c> window , simply press and hold
the left mouse button and drag the mouse over the text you want
to select. If the selection crosses line boundaries, the
selected text will consist of complete lines where applicable
(just like in a word processor). To select more text than fits
in the window, start by selecting a small portion in the
beginning of the text you want, then use the scrollbar
to view the end of the desired selection, point to it and press
the <em>right</em> mouse-button. The whole area between your
first selection and the point where you right-clicked will be
included in the selection.</p>
<p>The selected text is copied to the clipboard by either
pressing <c>Ctrl-C</c>, using the menu or pressing the copy
button in the toolbar.</p>
<p>Pasted text is always inserted at the current prompt position
and will be interpreted by Erlang as usual keyboard input.</p>
<p>Previous command lines can be retrieved by pressing the <c>Up
arrow</c> or by pressing <c>Ctrl-P</c>. There is also a drop
down box in the toolbar containing the command
history. Selecting a command in the drop down box will insert it
at the prompt, just as if you used the keyboard to retrieve the
command.</p>
<p>Closing the <c>werl</c> window will stop the Erlang emulator.</p>
</description>
</comref>
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