line break in pattern? about mparallel HOT 3 CLOSED

Hello.

I don't think you can have a "line break" in your command-line, in the sense of a line-feed (0x0A) or carriage-return (0x0D) character. Yes, in Batch files you can put a ^ symbol at the end of the line, which tells the Batch interpreter "command continues in next line". But this does not put a "line break" in the command-line! It rather concatenates several lines from your Batch file to a single command-line. This happens in Batch interpreter. And then the command-line, as a whole, will be passed to the program.

You can easily verify this with the following test program I have attached:
args.2018-12-26.zip

Above program does nothing but print all command-lin arguments, as they arrive at main() function.

Regards
MuldeR

from mparallel.

Yes, exactly. Is it possible to have that kind of flexibility to concatenate multiple lines within the enclosed quote of --pattern ?

from mparallel.

Hello.

Again, this is not about MParallel, but all about how Windows' Batch interpreter (cmd.exe) assembles multiple lines to a single command, when you put a ^ char at the end of a line in a Batch file.

It appears that, within a quoted string, Batch does not allow you to put a ^ char in order to make the command continue on next line! Or, in other words, you apparently can not make a single quoted string continue in the next line. You can easily confirm this behavior with args tool from my previous post:

args.exe "aaaa^
bbbb"

This does not work 😠

You would expect that the the single argument string aaaabbbb is sent to args.exe. But, in fact, the argument string aaaa^ is passed to args.exe, whereas bbbb is executed as a separate command!

Args [Dec 26 2018]

argv[0] = "args.exe"
argv[1] = "aaaa^"

'bbbb"' is not recognized as an internal or external command,
operable program or batch file.

So, obviously, all that you can do is this:

args.exe "aaaa" ^
"bbbb"

But then, of course, you will have two separate argument strings (command-line options):

Args [Dec 26 2018]

argv[0] = "args.exe"
argv[1] = "aaaa"
argv[2] = "bbbb"

Then again, I have no clue why you would need the pattern string to span multiple lines ❓

You could always do something like this with Batch syntax:

set "MY_PATTERN=aaaa"
set "MY_PATTERN=%MY_PATTERN% bbbb"
set "MY_PATTERN=%MY_PATTERN% cccc"

MParallel.exe --pattern="%MY_PATTERN%" [...]

...which, of course, is equivalent to:

MParallel.exe --pattern="aaaa bbbb cccc" [...]

Regards
MuldeR

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