Re: Aren't there code refs as well as function refs?

That's a very confusing question: code-ref and function-ref are used synonymously.

This a ref of a named function

\&foo

This a ref of a anonymous function

sub { ... }

This is a code-block and not (necessarily) in a function, they are important for scooping and as syntactic element like for if, map or sub (sic)

{ my $x = 1; ... }

Not to be confused with an anonymous hash ref

{ $x => 1,... }

(Code-blocks and anonymous hash references are distinguished by "looks-like guessing")

Curlies are also used for explicitly marking symbol names after sigils

"X${name}X" same as "X" . $name ."X"

A special syntactic sugar comes with are prototype (&) for arguments. One can skip the sub when passing an anonymous code-ref

After defining

sub bar(&) { ... }

you can write

bar { ... }

instead of

bar sub { ... }

And calling bar will fail at compile time if anything else than a code ref is passed.

THAT'S ALL!

This should be a list of all uses of curly brackets in Perl (omitting sublanguage syntax like regex)

Please explain what you don't understand.

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

Wikisyntax for the Monastery}

Comment on Re: Aren't there code refs as well as function refs? Select or Download Code

Replies are listed 'Best First'.
Re^2: Aren't there code refs as well as function refs? by tobyink (Canon) on Mar 05, 2023 at 14:04 UTC
You missed some uses for curlies! Delimiters for quote-like operators: `my $string = join q{ }, q(Hello), q/world/;` [download] Hash keys: `my %hash; $hash{foo} = 42; @hash{ 'bar', 'baz' } = ( 666, 999 );` [download] Unicode: `say "\N{DROMEDARY CAMEL}"; say "\x{1F42A}";` [download] Hire me at Toby Ink Ltd or Join my OnlyFans	[reply] [d/l] [select]
Re^3: Aren't there code refs as well as function refs? by LanX (Saint) on Mar 05, 2023 at 14:34 UTC
yeah, but quote-like delimiters are a wildmark which fit everywhere hash-keys - OK you are right - they belong to the already mentioned domain of hashes in-string metas for unicode are a sub-language like the afore-mentioned regex, there might be even more like `sprintf` or formats and I also didn't mention dereferencing `@{...}` etc., but those belong to the same domain like `@{name}` and the un-strict symbolic derefs `@{"na"."me"}` in short: outside strings (and offsprings like regex) are curlies meant for the domains of code-blocks hashes grouping of variable-symbols/refs Cheers Rolf _{(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l] [select]
Re^4: Aren't there code refs as well as function refs? by tobyink (Canon) on Mar 05, 2023 at 15:03 UTC
Technically the contents of `${...}`, `@{...}`, `%{...}`, `*{...}`, and `$#{...}` are blocks, so you already covered them. `use v5.10; no strict 'refs'; our $abc = 123; say ${ my @name = qw/a b c/; join q//, @name; };` [download] Hire me at Toby Ink Ltd or Join my OnlyFans	[reply] [d/l] [select]
Re^5: Aren't there code refs as well as function refs? by LanX (Saint) on Mar 05, 2023 at 17:41 UTC