Re: Regex critique

Hi stevieb

It's said that every programmer has to invent a template system or a vocabulary trainer.

And it seems every Perl hacker has to try to parse Perl. ;-P

... well ... how can I help you?

Do you want ...

... links to other projects trying to do the job with regexes in order to have a look into the code? *
... suggestions how to make your regex better maintainable by nesting regexes for different sub-grammars?
... a link where Merlyn shows that Perl can't be statically parsed because any imported sub with prototype can change how the parser proceeds?

Just a simple example

you need to exclude subs inside POD or strings from your listing.
strings are not easily detected because we have q and qq operators.

...

q!
  sub :attr() {
      print "bla"
   }
!
[download]

edit

*) like PPR,

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery
FootballPerl is like chess, only without the dice}

update

From your module

> Files are parsed using PPI, not by inspecting packages or op-trees.

I think it's clearer if you say

> Files are statically parsed using PPI, not by dynamically inspecting packages or coderefs.

Comment on Re: Regex critique Download Code

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Re^2: Regex critique by LanX (Saint) on Sep 07, 2018 at 23:20 UTC
> like PPR ... you may want to have a look at the following tests https://metacpan.org/source/DCONWAY/PPR-0.000021/t/ppi_statement_sub.t and https://metacpan.org/source/DCONWAY/PPR-0.000021/t/subdecl.t I wasn't able to find examples of attributes with arguments, so better see the corresponding perldoc in perlsub#Subroutine-Attributes `Examples of valid syntax (even though the attributes are unknown): sub fnord (&\%) : switch(10,foo(7,3)) : expensive; sub plugh () : Ugly('\(") :Bad; sub xyzzy : _5x5 { ... } Examples of invalid syntax: sub fnord : switch(10,foo(); # ()-string not balanced sub snoid : Ugly('('); # ()-string not balanced sub xyzzy : 5x5; # "5x5" not a valid identifier sub plugh : Y2::north; # "Y2::north" not a simple identifier sub snurt : foo + bar; # "+" not a colon or space` [download] Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply] [d/l]

Replies are listed 'Best First'.

Re^2: Regex critique
by LanX (Saint) on Sep 07, 2018 at 23:20 UTC

> like PPR ...

you may want to have a look at the following tests

https://metacpan.org/source/DCONWAY/PPR-0.000021/t/ppi_statement_sub.t

and

https://metacpan.org/source/DCONWAY/PPR-0.000021/t/subdecl.t

I wasn't able to find examples of attributes with arguments, so better see the corresponding perldoc in perlsub#Subroutine-Attributes

Examples of valid syntax (even though the attributes are unknown):

sub fnord (&\%) : switch(10,foo(7,3))  :  expensive;
sub plugh () : Ugly('\(") :Bad;
sub xyzzy : _5x5 { ... }

Examples of invalid syntax:

sub fnord : switch(10,foo(); # ()-string not balanced
sub snoid : Ugly('(');        # ()-string not balanced
sub xyzzy : 5x5;              # "5x5" not a valid identifier
sub plugh : Y2::north;        # "Y2::north" not a simple identifier
sub snurt : foo + bar;        # "+" not a colon or space
[download]

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery
FootballPerl is like chess, only without the dice}

[reply]
[d/l]