On 5.12.0, that didn't work for me. Here's some tests:

$ perl -wE 'sub meth { return (@_, q{A}); } my $o = bless {}; my $x = 
+q{meth}; say $o->$x;'
main=HASH(0x10053ad8)A

$ perl -wE 'sub meth { return (@_, q{A}); } my $o = bless {}; my %x = 
+(a => q{meth}); say $o->$x{a};'
syntax error at -e line 1, near "$x{a"
Execution of -e aborted due to compilation errors.

$ perl -wE 'sub meth { return (@_, q{A}); } my $o = bless {}; my %x = 
+(a => q{meth}); say $o->{ $x{a} };'
Use of uninitialized value in say at -e line 1.

$ perl -wE 'sub meth { return (@_, q{A}); } my $o = bless {}; my %x = 
+(a => q{meth}); say $o->${\$x{a}};'
main=HASH(0x10053ad8)A

[download]

Your $obj->{ $meth{a} }; is valid syntax for a hashref based object; it's much the same as $hashref->{$key} (ditto for my $o->{ $x{a} }). However, I don't imagine it invoked a method.

P.S. I think there's a typo in your first example. Should $obj->meth; be $obj->$meth;?

-- Ken

In reply to Re: Surprising quirk of method call parser by kcott
in thread Surprising quirk of method call parser by kstar

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