/*
* Kodkod -- Copyright (c) 2005-present, Emina Torlak
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package kodkod.ast;
import kodkod.ast.operator.Multiplicity;
import kodkod.ast.visitor.ReturnVisitor;
import kodkod.ast.visitor.VoidVisitor;
/**
* Denotes the integer obtained by summing the values of an iteger expression <i>ie</i>
* for all values of a scalar <i>x</i> drawn from a set <i>e</i>.
* @specfield intExpr: IntExpression
* @specfield decls: Decls
* @specfield children = 0->decls + 1->intExpr
* @invariant all d: decls.children[int] | d.multiplicity = 1
* @author Emina Torlak
*/
public final class SumExpression extends IntExpression {
private final Decls decls;
private final IntExpression intExpr;
/**
* Constructs a sum expression
* @ensures this.decls' = decls && this.intExpr' = intExpr
* @throws IllegalArgumentException some d: decls.children | d.multiplicty != ONE
*/
SumExpression(Decls decls, IntExpression intExpr) {
for(Decl d : decls) {
if (d.multiplicity()!=Multiplicity.ONE)
throw new IllegalArgumentException(d + " is not a scalar declaration.");
}
this.decls = decls;
this.intExpr = intExpr;
}
/**
* Returns this.decls.
* @return this.decls
*/
public final Decls decls() {
return decls;
}
/**
* Returns this.intExpr.
* @return this.intExpr
*/
public final IntExpression intExpr() {
return intExpr;
}
/**
* {@inheritDoc}
* @see kodkod.ast.IntExpression#accept(kodkod.ast.visitor.ReturnVisitor)
*/
@Override
public <E, F, D, I> I accept(ReturnVisitor<E, F, D, I> visitor) {
return visitor.visit(this);
}
/**
* {@inheritDoc}
* @see kodkod.ast.IntExpression#accept(kodkod.ast.visitor.VoidVisitor)
*/
@Override
public void accept(VoidVisitor visitor) {
visitor.visit(this);
}
/**
* {@inheritDoc}
* @see kodkod.ast.Node#toString()
*/
public String toString() {
return "(sum " + decls + " | " + intExpr + ")";
}
}