Multi-Line Comments in MortScript

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Multi-Line Comments in MortScript

The MortScript batch language for Windows Mobile may not be as powerful as the UNIX shell scripting language, but you can still get a lot of things done with it. The thing is that MortScript only support single line comments, with a hash (#) mark. So to comment out the following example, you'd have to put a hash mark in front of every line:

#  If (extension eq "")
#    Message ("Empty extension.", "Error!")
#  else
#    extension = "." & extension
#    action = 1
#  EndIf

Well, that's a lot of work. As you can see in the example above, that's five lines and a lot of typing. And you'd have to change the cursor position for every line. Don't you wish there is a C or Java-like multi-line comment (/* */) sequence?

Well, you can comment out multi-line statements by surrounding them with a subroutine keywords. The same example above would be changed to the following:

Sub comment1
  If (extension eq "")
    Message ("Empty extension.", "Error!")
  else
    extension = "." & extension
    action = 1
  EndIf
EndSub

The only catch is that MortScript only allows subroutines at the end of the program. Whenever the interpreter encounters the "Sub" keyword, it will stop executing. So you have to move the commented out code to the end of your script. Now, isn't that easier than commenting out every line?

Chieh Cheng
Tue, 19 Aug 2008 00:00:37 +0000

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