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LTA `.=` metaop is sensitive to whitespace when using on implicit $_ #2373

zoffixznet opened this issue Oct 14, 2018 · 1 comment


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commented Oct 14, 2018

For some time, I was under impression that .= metaassign op doesn't work with implicit $_, because when I write it the usual way, I get an error:

<Zoffix_> m: my $x = 42; .= flip with $x
<camelia> rakudo-moar 1beb7d4e7: OUTPUT: «===SORRY!=== Error while compiling <tmp>␤Preceding context expects a term, but found infix .= instead.␤at <tmp>:1␤------> my $x = 42; .=⏏ flip with $x␤»

However, that's because (IIRC) the .= exists in the grammar as both a fake infix and a methodop and the spacy version thinks I wrote an infix. If I omit whitespace, then the construct works just fine:

<Zoffix_> m: my $x = 42; .=flip with $x; dd $x
<camelia> rakudo-moar 1beb7d4e7: OUTPUT: «Str $x = "24"␤»

I think it'd be nice to make it DWIM with the whitespace case


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commented Oct 14, 2018

I think we could make this work. Agree that now that we also allow spaces around . for method calls elsewhere it also feels relatively consistent to have it DWIM.

@lucasbuchala lucasbuchala added the metaop label Mar 15, 2019

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