Perl 6
SMOP Lexical Scope Implementation: Revision 1

One first hard step in implementing lexical scopes is to put together a lot of details that are spread over the specs. In this page we're going to sketch a model for the lexical scopes that support all the documented Perl 6 features.

Variable Lookup

The local variable lookup happens in the following order:

  1. MY
  2. OUTER recursive

Special cases

$_

$_ is always locally defined in any block. Routines start with an empty $_, other Code objects have a signature of:

 -> $_ is rw = OUTER::<$_>

$! and $/

These variables are compile time aliases to $+! and $+/


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