[perl #102362] such a signature with two named parameters save for the sigil is illegal.

[Jimmy Zhuo]

# New Ticket Created by  "Jimmy Zhuo" 
# Please include the string:  [perl #102362]
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# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=102362 >


JimmyZ  perl6: sub f(:$x, :&x) { say $x }; f(:x(min(6,2,3)), :x(1, 2, 3))
p6eval  niecza v10-66-g71325b0: OUTPUT«===SORRY!===␤␤Undeclared routine:␤ 'min' 
used at line 1␤␤Potential difficulties:␤ &x is declared but not used at 
/tmp/JqYiXINZ05 line 1:␤------> sub f(:$x, :⏏&x) { say $x }; f(:x(min(6,2,3)), 
:x(1, ␤␤␤Unhandled Excepti…
p6eval  ..pugs b927740: OUTPUT«123␤»
p6eval  ..rakudo 158bd0: OUTPUT«1 2 3␤»
moritz  is kinda surprised that it doesn't blow up
JimmyZ  perl6: sub f(:$x, :$x) { say $x }; f(:x(min(6,2,3)))
p6eval  niecza v10-66-g71325b0: OUTPUT«===SORRY!===␤␤Undeclared routine:␤ 'min' 
used at line 1␤␤Potential difficulties:␤ Useless redeclaration of variable $x 
(see line 1) at /tmp/8B3kFxpiJZ line 1:␤------> sub f(:$x, :$x⏏) { say $x }; 
f(:x(min(6,2,3)))␤␤␤Un…
p6eval  ..pugs b927740: OUTPUT«2␤»
p6eval  ..rakudo 158bd0: OUTPUT«===SORRY!===␤Redeclaration of symbol $x at line 
1, near ") { say $x"␤»
JimmyZ  thinks it's a bug
masak   it is.
masak   such a signature with two named parameters save for the sigil is 
illegal.
masak   I remember moritz and me spec'ing the rules for that.
moritz  std: -> :$x, :&x { }
p6eval  std be1f10e: OUTPUT«ok 00:01 122m␤»
masak   STD is lagging
JimmyZ  std: -> :$x, :$x { }
p6eval  std be1f10e: OUTPUT«Potential difficulties:␤ Useless redeclaration of 
variable $x (see line 1) at /tmp/FKzWHzu2P5 line 1:␤------> -> :$x, :⏏$x { }␤ok 
00:01 121m␤»
masak   that's too lenient, if you ask me.
masak   it's fine for lexicals in general, but not for a siggie.
JimmyZ  perl6: sub f(:$x, :%x) { say $x };
p6eval  pugs b927740, rakudo 158bd0: ( no output )
p6eval  ..niecza v10-66-g71325b0: OUTPUT«Potential difficulties:␤ %x is 
declared but not used at /tmp/UvwYaQgjMv line 1:␤------> sub f(:$x, :⏏%x) { say 
$x };␤ &f is declared but not used at /tmp/UvwYaQgjMv line 1:␤------> sub 
f⏏(:$x, :%x) { say $x };␤␤»…
masak   binding is serious business
moritz  and signatures are complex beasts
JimmyZ  niecza has this bug too