integrate lambda expressions

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/api/java/CMakeLists.txt

@@ -141,6 +141,7 @@ set(Z3_JAVA_JAR_SOURCE_FILES
   IntNum.java
   IntSort.java
   IntSymbol.java
+  Lambda.java
   ListSort.java
   Log.java
   ModelDecRefQueue.java

src/api/java/Context.java

@@ -518,7 +518,7 @@ public class Context implements AutoCloseable {
 
     /**
      * Creates a fresh constant function declaration with a name prefixed with
-     * {@code prefix"}. 
+     * {@code prefix}. 
      * @see #mkFuncDecl(String,Sort,Sort)
      * @see #mkFuncDecl(String,Sort[],Sort)
      **/
@@ -696,7 +696,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Creates the equality {@code x"/> = <paramref name="y}.
+     * Creates the equality {@code x = y}
      **/
     public BoolExpr mkEq(Expr x, Expr y)
     {
@@ -2498,6 +2498,40 @@ public class Context implements AutoCloseable {
                     quantifierID, skolemID);
     }
 
+    /**
+     * Create a lambda expression.
+     * 
+     * {@code sorts} is an array
+     * with the sorts of the bound variables, {@code names} is an array with the
+     * 'names' of the bound variables, and {@code body} is the body of the
+     * lambda. 
+     * Note that the bound variables are de-Bruijn indices created using {@see #MkBound}
+     * Z3 applies the convention that the last element in {@code names} and
+     * {@code sorts} refers to the variable with index 0, the second to last element
+     * of {@code names} and {@code sorts} refers to the variable
+     * with index 1, etc.
+     *
+     * @param sorts the sorts of the bound variables.
+     * @param names names of the bound variables.
+     * @param body the body of the quantifier.
+     **/
+     public Lambda mkLambda(Sort[] sorts, Symbol[] names, Expr body)
+     {
+         return Lambda.of(this, sorts, names, body);
+     }
+
+    /**
+     * Create a lambda expression.
+     * 
+     * Creates a lambda expression using a list of constants that will
+     * form the set of bound variables.
+     **/
+     public Lambda mkLambda(Expr[] boundConstants, Expr body)
+     {
+         return Lambda.of(this, boundConstants, body);
+     }
+
+
     /**
      * Selects the format used for pretty-printing expressions.
      * Remarks:  The
@@ -2653,7 +2687,7 @@ public class Context implements AutoCloseable {
 
     /**
      * Create a tactic that applies {@code t1} to a Goal and then
-     * {@code t2"/> to every subgoal produced by <paramref name="t1}.
+     * {@code t2} to every subgoal produced by {@code t1}
      **/
     public Tactic andThen(Tactic t1, Tactic t2, Tactic... ts)
            
@@ -2734,7 +2768,7 @@ public class Context implements AutoCloseable {
 
     /**
      * Create a tactic that applies {@code t1} to a given goal if the
-     * probe {@code p"/> evaluates to true and <paramref name="t2}
+     * probe {@code p} evaluates to true and {@code t2}
      * otherwise.
      **/
     public Tactic cond(Probe p, Tactic t1, Tactic t2)
@@ -2895,7 +2929,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value returned by
+     * Create a probe that evaluates to {@code true} when the value returned by
      * {@code p1} is less than the value returned by {@code p2}
      **/
     public Probe lt(Probe p1, Probe p2)
@@ -2907,7 +2941,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value returned by
+     * Create a probe that evaluates to {@code true} when the value returned by
      * {@code p1} is greater than the value returned by {@code p2}
      **/
     public Probe gt(Probe p1, Probe p2)
@@ -2919,7 +2953,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value returned by
+     * Create a probe that evaluates to {@code true} when the value returned by
      * {@code p1} is less than or equal the value returned by
      * {@code p2}
      **/
@@ -2932,7 +2966,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value returned by
+     * Create a probe that evaluates to {@code true} when the value returned by
      * {@code p1} is greater than or equal the value returned by
      * {@code p2}
      **/
@@ -2945,7 +2979,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value returned by
+     * Create a probe that evaluates to {@code true} when the value returned by
      * {@code p1} is equal to the value returned by {@code p2}
      **/
     public Probe eq(Probe p1, Probe p2)
@@ -2957,7 +2991,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value {@code p1} and {@code p2} evaluate to "true".
+     * Create a probe that evaluates to {@code true} when the value {@code p1} and {@code p2} evaluate to {@code true}.
      **/
     public Probe and(Probe p1, Probe p2)
     {
@@ -2968,7 +3002,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value {@code p1} or {@code p2} evaluate to "true".
+     * Create a probe that evaluates to {@code true} when the value {@code p1} or {@code p2} evaluate to {@code true}.
      **/
     public Probe or(Probe p1, Probe p2)
     {
@@ -2979,7 +3013,7 @@ public class Context implements AutoCloseable {
     }
 
     /**
-     * Create a probe that evaluates to "true" when the value {@code p} does not evaluate to "true".
+     * Create a probe that evaluates to {@code true} when the value {@code p} does not evaluate to {@code true}.
      **/
     public Probe not(Probe p)
     {

src/api/java/Quantifier.java

@@ -37,7 +37,7 @@ public class Quantifier extends BoolExpr
      **/
     public boolean isExistential()
     {
-        return !isUniversal();
+        return Native.isQuantifierExists(getContext().nCtx(), getNativeObject());
     }
 
     /**