44ee578a3a
This adds support for `include as <identifier>` type statements which in addition to pulling in any defined resources, it also makes the contents of the scope of the class available to the scope of the include statement, but prefixed by the identifier specified. This makes passing data between scopes much more powerful, and it also allows classes to return useful classes for subsequent use. This also improves the SetScope procedure and adds to the Ordering stage. It's unclear if the current Ordering stage can handle all code, or if there exist corner-cases which are valid code, but which would produce a wrong or imprecise topological sort. Some extraneous scoping bugs still exist, which expose certain variables that we should not depend on in future code. Co-authored-by: Samuel Gélineau <gelisam@gmail.com>
32 lines
963 B
Plaintext
32 lines
963 B
Plaintext
-- main.mcl --
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$x = "i am x" # i am top-level
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class c2() {
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$y = "i am y and " + $x
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#$x = $x # might be allowed, i don't _really_ care, but i prefer not
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# We need to be able to re-define our new $x that shadows the parent $x,
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# but it should be able to incorporate the parent (top-level) $x into
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# the new value that this new $x here becomes.
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# XXX: not supported for now: could not set scope: not a dag
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# Sam suggested the RHS $x should have a special keyword to make it
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# refer to the parent scope. I suggested when $x is also on the LHS,
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# then this magic keyword should be implied. And only possible in the
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# case for variables on the RHS that are the same var as on the LHS.
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#$x = $x + " and this is shadowed" # this is important
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}
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include c2 as f1
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test $x {}
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test $f1.y {}
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# the really tricky case
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# XXX: not supported for now: could not set scope: not a dag
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#test $f1.x {}
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-- OUTPUT --
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Vertex: test[i am x]
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Vertex: test[i am y and i am x]
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