root/trunk/ProjectFortress/demos/DynamicSemantics.fsi

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    Copyright 2008 Sun Microsystems, Inc.,
    4150 Network Circle, Santa Clara, California 95054, U.S.A.
    All rights reserved.

    U.S. Government Rights - Commercial software.
    Government users are subject to the Sun Microsystems, Inc. standard
    license agreement and applicable provisions of the FAR and its supplements.

    Use is subject to license terms.

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    trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
 ******************************************************************************)

api DynamicSemantics
import Map.{...}
import Syntax.{...}

(* Runtime value ***************************************************************)
trait RuntimeValue comprises { Val, FnValue }
  getValue(): Value
  toString(): String
  toSource(): String
end

object Val(v: Value) extends RuntimeValue end

object FnValue(fun: FnExpr, sigma: Map[\String, RuntimeValue\]) extends RuntimeValue end

(* Runtime value factories *****************************************************)
val(expr: Value): RuntimeValue
val(expr: FnExpr, sigma: Map[\String, RuntimeValue\]): RuntimeValue

(* Initialize the helper table *)
initDynamic(): ()

(* Evaluate a given program. *)
opr VDASH(p: Program): RuntimeValue

end