class X::Signature::Placeholder
Compilation error due to placeholders in a block with a signature
class X::Signature::Placeholder does X::Comp { }
Compile time error thrown when a block has both an explicit signature and placeholder parameters.
For example
sub f() { $^x }
dies with
===SORRY!===
Placeholder variable '$^x' cannot override existing signature
Methods
method placeholder
method placeholder(--> Str:D)
Returns the name of a placeholder that was used in a block that already had a signature.