The issue is that the file syntax is *not* Perl, i.e. there can be things like this: 
CHAIN<%=$chain_num%>_EN [<%=$lsb%>:<%=$lsb++%>] = 1'h0;

[download]

Even the format spec document suggests this approach "wrap all non-Perl chunks with prints, leaving the code snippets as is, and let Perl evaluate the whole thing".

The reason a simple eval() doesn't work is because there is Perl variable state that needs to be honored across the entire file (e.g. $lsb in the example above is set to 0 at the start and incremented a number of times through the file. Hence, we will need a full Perl process to evaluate the whole file.

In any case, after understanding the REPL issue, I broke up the processing into 2 sections:

* send the entire file to the Perl child process, and close the child's input filehandle

* then read back the generated output in a while loop

* if we encounter an "include" statement, then recursively restart the process with the new file.

This works perfectly. Thanks for all the suggestions.

Pankaj

In reply to Re^4: Running Perl in an Expect loop by StoneLeopard
in thread Running Perl in an Expect loop by StoneLeopard

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