root/trunk/ProjectFortress/syntax_abstraction_tests/GrammarComposition.fsi

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    4150 Network Circle, Santa Clara, California 95054, U.S.A.
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    trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
 ******************************************************************************)

api GrammarComposition

    import FortressAst.{...}
    import FortressSyntax.{...}

    grammar A extends { Expression }
      Expr |:=
          foo => <[ 1 ]>
        | bar => <[ 2 ]>
    end

    grammar B extends { Expression, A }
      Expr |:=
          baz => <[ (foo) + (bar) ]> (* implicit private import from A *)
    end

    grammar C extends { Expression, A }
      Expr |:=
          baz => <[ (foo) + (bar) ]> (* explicit private import from A *)
        | private Expr from A
    end

    grammar D extends { Expression, A }
      Expr |:=
          baz => <[ (foo) + (bar) ]> (* public import from A *)
        | Expr from A
    end

    (* The following grammars test uses of identifiers within
     * templates. Consequently, they don't have corresponding
     * .fss source files to test them.
     *)

    grammar UseC extends { Expression, C }
      Expr |:=
          quux => <[ fn(foo) => baz ]> (* illegal if foo were imported *)
        | private Expr from C
    end

    grammar UseD extends { Expression, D }
      Expr |:=
          quux => <[ fn(x) => ((foo) + (baz)) ]>
        | private Expr from D
    end

    grammar RefuseA extends { Expression, A }
      Expr |:=
          snark => <[ fn(foo) => foo ]> (* illegal if foo were imported *)
        | without Expr from A
    end

end