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* scheme-interpreter/table.sig (TABLE): introduce a signature for
the table concept and a first implementation of a functor to build
TABLE structures.
* scheme-interpreter/table.sig (TABLE): introduce a signature for
the table concept and a first implementation of a functor to build
TABLE structures.
(MakeTableWithStringIdentifierAndDoubleListImpl): refined the
implementation of the functor for the table in order to
parameterize the identifier type, instead of setting it to
`string'.
* scheme-interpreter/table-tests.sml (TableTests.suite): add a
suite of tests for the table implementation using two `parallel'
lists.

* scheme-interpreter/table.sig (TABLE): introduce a signature for
the table concept and a first implementation of a functor to build
TABLE structures.
(MakeTableWithStringIdentifierAndDoubleListImpl): refined the
implementation of the functor for the table in order to
parameterize the identifier type, instead of setting it to
`string'.

* scheme-interpreter/table.sig: refactored the functor for
parameterizing on the type of `stuff' value too (as done for the
type of identifier).
Remove a type specialization in TABLE signature.
Refactor the code creating dedicated file for type parameterization.
First attempt to type `sexp_to_action'.
* scheme-interpreter/scheme-interpreter.fun
(SchemeInterpreterEnvironment): add a first implementation of the
environment for interpreting a Scheme expression.