Re^6: Dereferencing in blessed object

I think putting subroutines at the end was a requirement of BBC Basic¹ which is where my coding started...well, actually it started before that with Shape Tables on an Apple II. Two of them had been purchased by the school the year I started at grammar school - that's a long time ago!

Until very recently I always used a leading & for subroutines - I didn't realise it was ~~optional~~ generally a bad idea.
I think I always add parenthesis to user-defined functions so unwittingly follow that style directive.

Don’t use unnecessary parentheses for builtins and ‘honorary’ builtins

Is an 'honorary' built-in something that is very common but not part of Perl language?
Something like fetchrow_array in DBI or get in LWP::Simple.

I was surprised to see item 122 on the list...
Don’t use subroutine prototypes
Surely prototypes, in some circumstances, are extremely useful.

¹ - Incidentally, the BBC Micro turns 40 this year!

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Re^7: Dereferencing in blessed object (Subroutine Prototype References) by eyepopslikeamosquito (Archbishop) on Feb 27, 2021 at 23:21 UTC
Is an 'honorary' built-in something that is very common but not part of Perl language? It's a bit more restricted than that. Honorary built-ins are subroutines from core Perl modules that provide functionality that ought to be in the language itself -- for example, `carp` and `croak` from the core Perl Carp module. Surely prototypes, in some circumstances, are extremely useful Rarely. There are many references on this tricky topic. Subroutine Prototype References Far More than Everything You've Ever Wanted to Know about Prototypes in Perl -- by Tom Christiansen - classic article posted at Perl Monks by liverpole Gratuitous use of Perl Prototypes by grantm (2004) Perl Best Practices item 122 "Don't use subroutine prototypes" Perl::Critic::Policy::Community::Prototypes - Don't use function prototypes Understand why you probably don't need prototypes by brian_d_foy (The Effective Perler) Use v5.20 subroutine signatures by brian_d_foy (The Effective Perler) Filter::signatures by Corion - very simplistic signatures for Perl < 5.20 (see Re: features and backwards compatibility) Guacamole - a parser toolkit for Standard Perl Fun with Prototypes by haukex (2017) Re: Perl script compressor by haukex (2019) Too many arguments for subroutine by anonymonk (2023) perldoc References Prototypes - a very limited kind of compile-time argument checking using function prototyping Named Unary Operators - named unary operators are treated as functions with one argument, with optional parentheses Signatures - enabled automatically by a `use v5.36` or higher declaration, or more directly by `use feature 'signatures'` in the current scope Updated: Added many references long after the original node was written.	[reply] [d/l] [select]

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Re^7: Dereferencing in blessed object (Subroutine Prototype References)
by eyepopslikeamosquito (Archbishop) on Feb 27, 2021 at 23:21 UTC

Is an 'honorary' built-in something that is very common but not part of Perl language?

core

carp

croak

Carp

Surely prototypes, in some circumstances, are extremely useful

Rarely. There are many references on this tricky topic.

Subroutine Prototype References

Far More than Everything You've Ever Wanted to Know about Prototypes in Perl -- by Tom Christiansen - classic article posted at Perl Monks by liverpole
Gratuitous use of Perl Prototypes by grantm (2004)
Perl Best Practices item 122 "Don't use subroutine prototypes"
Perl::Critic::Policy::Community::Prototypes - Don't use function prototypes

Understand why you probably don't need prototypes by brian_d_foy (The Effective Perler)
Use v5.20 subroutine signatures by brian_d_foy (The Effective Perler)
Filter::signatures by Corion - very simplistic signatures for Perl < 5.20 (see Re: features and backwards compatibility)

Guacamole - a parser toolkit for Standard Perl

Fun with Prototypes by haukex (2017)
Re: Perl script compressor by haukex (2019)

Too many arguments for subroutine by anonymonk (2023)

perldoc References

Prototypes - a very limited kind of compile-time argument checking using function prototyping
Named Unary Operators - named unary operators are treated as functions with one argument, with optional parentheses
Signatures - enabled automatically by a use v5.36 or higher declaration, or more directly by use feature 'signatures' in the current scope

Updated: Added many references long after the original node was written.

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