Zinthose
31st July 2009 17:07 UTC

!define and CRLF escape codes
  I got a notion in my head and wanted to try it out.

Create a multiline !define.

## Declaration

>Var /GLOBAL NULL

>!define NULL `$NULL\\R\\NStrCpy $NULL 0`


>## Example

   Pop ${NULL}

    DetailPrint $NULL

    

>## Becomes

    Pop $NULL

StrCpy $NULL 0

    DetailPrint $NULL 

>

At the moment this doesn't appear possible without building my own processor. The idea is an interesting whimsy and I thought I'd share in the hopes that the concept can be discussed. This might make for some interesting macros in the future if implemented.

Request Ticket

Anders
31st July 2009 18:18 UTC

first off, a macro can't help you?

the problem with this is, what if you want a newline in the define, !define sometext "foo$\nBar" ? This is far more common, so you would need to come up with another way to escape it. I don't think $\0 does anything, so maybe we could use that

Zinthose
31st July 2009 19:59 UTC

A macro would work IF the macro could be included inline. It would also make the code easier to read than mentally parsing the meta characters in your head like the previous !define example.

At this time though, adding an inline !includemacro causes a compiler error.

## Definitions

   Var /GLOBAL NULL

   !define NULL `!insertmacro NULL`

    !macro NULL

        $NULL

        StrCpy $NULL 0

   !macroend


Section

    ## Example

       Pop ${NULL}

        DetailPrint $NULL

    

    ## Becomes

       Pop !insertmacro NULL # Compile Error here: Pop expects 1 parameters, got 2.

        DetailPrint $NULL

    

    ## Then

        Pop $NULL

        StrCpy $NULL 0

        DetailPrint $NULL  

    

        Quit

SectionEnd 

>

Anders
31st July 2009 20:10 UTC

!macro NULL op
${op} $NULL
StrCpy $NULL 0 
!macroend


!insertmacro NULL pop
DetailPrint $NULL