Note: PLUS is a high-level, special-purpose language developed for internal use by Unisys systems programmers. PLUS includes some aspects of a general-purpose language to accommodate the various requirements of systems and applications programming. PLUS is a Unisys proprietary language and compiler designed for implementing Unisys software products. The PLUS compiler is released to OS 2200 system sites as a tool for generating and maintaining Unisys software products. Any other utilization of PLUS is not authorized.
The PLUS language editor is a text editor that includes several features intended to make editing PLUS language source files easier. It launches automatically when you open a file in a project with a .PLS or .PLUS extension. To use the PLUS editor on other kinds of files, on the File menu, choose Open External File With …, then PLUS Editor.
PLUS syntax color coding
Keywords are maroon
Types are bold blue
Strings are light blue
Comments are green
Automatic block indentation
If this feature is turned off in the PLUS Preference settings, the leading indentation of each line of code entered is set to match the indentation of the preceding source line. To manually increase or decrease the indentation level, press Tab or Shift-Tab, respectively.
Automatic conversion of tab characters and line delimiters
To support the requirements of the OS 2200 file system and the OS 2200 PLUS compiler, tab characters in PLUS language files are automatically converted to spaces, and line termination sequences are changed to line feeds when you save the file.
To change your preferences, on the Window menu, choose Preferences, then PLUS Preferences. You can set the displayed tab increment, turn on the display of line numbers, and enable the automatic block indentation. Other editor settings are shared in common with all other Eclipse editors. Change these on the Window menu, choosing Preferences, General, and Editors.