Re^6: What esteemed monks think about changes necessary/desirable in Perl 7 outside of OO staff

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Re^7: What esteemed monks think about changes necessary/desirable in Perl 7 outside of OO staff by dave_the_m (Monsignor) on Sep 11, 2020 at 14:52 UTC
How would the parser know to give a "missing continuation" error message? '+$d+$e' is perfectly legal perl code, albeit code which gives rise to the warning "Useless use of addition (+) in void context". The reason I gave that code as an example is that it's a perfectly normal way of spreading complex expressions over multiple lines: e.g. where you need to add several variables together and the variables have non-trivial (i.e. long) names, e.g. `$pressure = $partial_pressure_nitrogen + $partial_pressure_oxygen + $partial_pressure_water_vapour + $partial_pressure_argon + $partial_pressure_carbon_dioxide;` [download] In this case, the automatic semicolons are unhelpful and will give rise to confusing error messages. So you've just switched one problem for another, and raised the cognitive load - people now need to know about your pragma and also know when its in scope. Dave.	[reply] [d/l]
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Re^7: What esteemed monks think about changes necessary/desirable in Perl 7 outside of OO staff by Tux (Canon) on Sep 12, 2020 at 09:38 UTC
You also completely ruin maintainability and extensibility. Consider a filter module ... `my $fixed = $bad =~ y/\x{00d0}/\x{0110}/r # Eth != D-stroke =~ y/\x{0189}/\x{0110}/r # LETTER AFRICAN D != +D-stroke =~ s{\bpra[ck]ti[sc]e\b}{practice}gr # All 4 seen in docume +nt AB12.38C =~ s{\bX13\.GtrA\.14\b}{X13_GA12}gr # Product got renamed =~ s{\b1234\szip\b}{1234ZIP}gir # Reciever will crash +on badly formed ZIP code =~ s{\bpays\s-?\s*bas\b} {The Netherlands}gir # French forms :( =~ ....;` [download] The more examples I see posted by my esteemed co-monks, the less I like the idea, and I hated it already when I read it in the OP. Enjoy, Have FUN! H.Merijn	[reply] [d/l]
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Re^7: What esteemed monks think about changes necessary/desirable in Perl 7 outside of OO staff by ikegami (Patriarch) on Sep 14, 2020 at 22:11 UTC
Yes, and the user will get an error. Then your suggestion would break a very useful feature. So useful that I take advantage of it in virtually every one of my programs/modules.	[reply]


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