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Re^2: Why Perl Is Not My Favourite Functional Programming Language

by TimToady (Parson)
on Nov 06, 2004 at 23:02 UTC ( #405819=note: print w/replies, xml ) Need Help??


in reply to Re: Why Perl Is Not My Favourite Functional Programming Language
in thread A mini-language for sequences (part 1)

Some slight tweaking is in order. The backslashes are not needed, since &foo is already a reference in scalar context. You don't need the dot to dereference the routine value either, though it doesn't hurt anything. You don't need the last $ if you bind to &plus_op_subref instead. Also, one thing you couldn't know, since I just changed it, is that all operator names now use a variant of hash subscript syntax, so the name of the builtin addition operator is any of:
infix:+ infix:<<+>> infix:{'+'}
So I'd currently write your code as:
my &plus_op_subref = &infix:+; my &not_op_subref = &prefix:!; say plus_op_subref(3, 2); # 5
See http://www.wall.org/~larry/syn for preprints of the most recent Synopses. And http://www.wall.org/~larry/apo has Apocalypses annotated with "Update" sections.

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Re^3: Why Perl Is Not My Favourite Functional Programming Language
by iblech (Friar) on Nov 07, 2004 at 11:31 UTC

    Just read the message on p6l :)

    Another idea, I think it'd be most efficient if we'd bind &plus_op_subref to &infix:+ at compile-time:

    my &plus_op_subref ::= &infix:+; my &not_op_subref ::= &prefix:!; say plus_op_subref(3, 2); # 5

    Discussing about Perl 6 is fun :)

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