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An expression language designed for embedding in java projects

There is a newer version: 1.1

package net.optionfactory.pebbel.ast;

/**
 * An AST node representing a boolean expression. Can be either a
 * shortCircuiting expression (e.g: {@code a && b},{@code a || b}) or a function
 * call with a boolean return value (e.g: {@code true()}).
 */
public interface BooleanExpression extends Expression {

     R accept(Visitor visitor, T value);

    public interface Visitor extends ShortCircuitExpression.Visitor, FunctionCall.Visitor {

        R visit(BooleanExpression node, T value);
    }
}