SMOP Interpreter Implementation API / Perl 6

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Perl 6

SMOP Interpreter Implementation API

This is the API that must be implemented by any interpreter that wants to have its run loop integrated with the SMOP Run Loop.

Running operations

has_next($interpreter: ) -- called before next to see if there is something to be evaluated.
next($interpreter: ) -- called before eval to prepare the next node.
eval($interpreter: ) -- evaluate the current instruction.
setr($interpreter: $value) -- receive information from other continuation. Usually, these are arguments or return values.

Introspection operators

caller($interpreter: ) -- returns the continuation that precedes the current one.
lexical($interpreter: ) -- returns lexical information about the current execution.
jail($interpreter: ) -- returns the jail information that any exception-like operator would check to loop for a safe point.
debug($interpreter: ) -- returns debug information about the current execution.

The Debug API

This is completely vague now. The only thing that are presumably interesting to be available are:

file name
line number
character position range (if available)
source code

The Lexical API

SMOP Lexical Scope Implementation