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REXX is an interpreter language which automates program execution and allows for easy changes. Using REXX, procedures are programmed which can be called and executed using a REXX command processor. Open Object Rexx (ooRexx) is an open-source REXX interpreter which can be used for executing REXX scripts under Windows, see https://www.oorexx.org.

Jan hat geschrieben: ↑Mi, 31. Mär 2021 15:06 Martin,

REXX geht auch unter Windows (und Linux, Amiga, Unix-Derivate, und noch ein paar mehr). Wenn das nur für OS/2 wäre, dann würde Alaska da sicher keine Zeit rein investieren. Es gibt ja keine aktuelle Xbase++-Version für OS/2.

Executes an OS/2 command file.
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This function is not available in the Xbase++ Windows version since REXX is not part of Windows NT or Windows 9x.

RunRexx() executes an OS/2 command file and passes optional arguments to the REXX procedure in this file.
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Review documentation on RunRexx() for Windows. (*.chm) (W21GX7)

Jan hat geschrieben: ↑Mi, 31. Mär 2021 15:06 Martin,
REXX geht auch unter Windows (und Linux, Amiga, Unix-Derivate, und noch ein paar mehr). Wenn das nur für OS/2 wäre, dann würde Alaska da sicher keine Zeit rein investieren. Es gibt ja keine aktuelle Xbase++-Version für OS/2.
Wobei ich Dir sonst zustimme: Ich kenne wissentlich niemanden, der REXX benutzt. Aber irgend ein Alaska-Kunde muß wichtig genug sein das Alaska das für den umgesetzt hat. Wäre mal interessant zu wissen, was man damit ganz praktisch gesehen alles anstellen kann. Vielleicht käme man dabei dann ja auf den Geschmack.
Jan

Xbase++ 2.0 Build 2.00.1087 hat geschrieben:RunRexx()
Executes an OS/2 command file.

RunRexx( <cCmdFileName> [, <cArguments,...>] ) --> xReturn

Parameters
<cCmdFileName>
<cCmdFileName> is a character string which contains the file name for the OS/2 command file executed. The file name can be specified without an extension. The default file extension is "CMD".

<cArguments,...>
<cArguments,...> is a comma-separated list of character expressions passed as arguments to the OS/2 command file. Any number of arguments can be passed.

Return
The function RunRexx() returns the return value of the REXX procedure in the file <cCmdFileName>.

Description
This function is not available in the Xbase++ Windows version since REXX is not part of Windows NT or Windows 9x.

RunRexx() executes an OS/2 command file and passes optional arguments to the REXX procedure in this file.

RunRexx()
Executes a REXX script file.

RunRexx( <cScriptFileName> [, <cArguments,...>] ) --> xReturn

Parameters
<cScriptFileName>
<cCmdFileName> is a character string which contains the file name of the script file to be executed.

<cArguments,...>
<cArguments,...> is a comma-separated list of character expressions passed as arguments to the script file. Any number of arguments can be passed.

Return
The function RunRexx() returns the return value of the REXX script file.

Description
RunRexx() executes a script file and passes optional arguments to the REXX procedure in this file.

REXX is an interpreter language which automates program execution and allows for easy changes. Using REXX, procedures are programmed which can be called and executed using a REXX command processor. Open Object Rexx (ooRexx) is an open-source REXX interpreter which can be used for executing REXX scripts under Windows, see https://www.oorexx.org.

REXX procedures are typically stored in files with the extension .rex. These are script files comparable to .bat files in DOS. REXX script can be replaced, processed and changed with a simple text editor. They differ from .bat files in that they must always begin with a comment line (/* Comment */) so the characters "/*" must be the first two characters in the file. These characters are key identifiers for the REXX interpreter.

All commands and functions of REXX are usable within a REXX file. If such a file is started by RunRexx() from an Xbase++ application, the REXX procedure runs in the address space of the Xbase++ application. RunRexx() extends the language scope of REXX to all globally visible functions, procedures and dynamic variables of the calling Xbase++ application. This means that all Xbase++ functions and procedures can be called and executed within the REXX script. That includes all the functions of the Xbase++ runtime library and all globally visible user-defined functions and procedures. Also, all dynamic variables visible when the call RunRexx() occurs are visible. Access to lexically scoped variables and calls to functions or procedures declared as STATIC is not possible. The program operation of an Xbase++ application can be changed without compile and link cycles since REXX script files can simply be processed with a text editor.

Passing of arguments to REXX

The function RunRexx() can pass many arguments to the REXX procedure using <cArguments,...>. The passed arguments must always have the data type "character", since REXX is a character based interpreter language. To access the passed arguments within the REXX procedure, REXX provides the command ARG and the function ARG(). The command ARG is generally needed when a REXX procedure is started from the command line. The following REXX procedure demonstrates this and receives two arguments: