[poincare] Refactor the first lines of shallowReduce

poincare/src/absolute_value.cpp

@@ -28,8 +28,8 @@ LayoutRef AbsoluteValue::createLayout(Preferences::PrintFloatMode floatDisplayMo
 }
 
 Expression AbsoluteValue::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/arc_sine.cpp

@@ -18,8 +18,8 @@ Expression * ArcSine::clone() const {
 }
 
 Expression ArcSine::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/arc_tangent.cpp

@@ -18,8 +18,8 @@ Expression * ArcTangent::clone() const {
 }
 
 Expression ArcTangent::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/binomial_coefficient.cpp

@@ -21,8 +21,8 @@ Expression * BinomialCoefficient::clone() const {
 }
 
 Expression BinomialCoefficient::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/ceiling.cpp

@@ -21,8 +21,8 @@ Expression * Ceiling::clone() const {
 }
 
 Expression Ceiling::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/complex_argument.cpp

@@ -17,8 +17,8 @@ Expression * ComplexArgument::clone() const {
 }
 
 Expression ComplexArgument::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/confidence_interval.cpp

@@ -25,8 +25,8 @@ int ConfidenceInterval::polynomialDegree(char symbolName) const {
 }
 
 Expression ConfidenceInterval::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/conjugate.cpp

@@ -20,8 +20,8 @@ LayoutRef Conjugate::createLayout(Preferences::PrintFloatMode floatDisplayMode,
 }
 
 Expression Conjugate::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/determinant.cpp

@@ -17,8 +17,8 @@ Expression * Determinant::clone() const {
 }
 
 Expression Determinant::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/division_quotient.cpp

@@ -19,8 +19,8 @@ Expression * DivisionQuotient::clone() const {
 }
 
 Expression DivisionQuotient::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/division_remainder.cpp

@@ -19,8 +19,8 @@ Expression * DivisionRemainder::clone() const {
 }
 
 Expression DivisionRemainder::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/equal.cpp

@@ -39,8 +39,8 @@ Expression * Equal::standardEquation(Context & context, Preferences::AngleUnit a
 }
 
 Expression Equal::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   if (operand(0)->isIdenticalTo(operand(1))) {

poincare/src/factorial.cpp

@@ -37,8 +37,8 @@ bool Factorial::needsParenthesesWithParent(const SerializationHelperInterface *
 /* Simplification */
 
 Expression Factorial::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/floor.cpp

@@ -21,8 +21,8 @@ Expression * Floor::clone() const {
 }
 
 Expression Floor::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/frac_part.cpp

@@ -18,8 +18,8 @@ Expression * FracPart::clone() const {
 }
 
 Expression FracPart::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/great_common_divisor.cpp

@@ -20,8 +20,8 @@ Expression * GreatCommonDivisor::clone() const {
 }
 
 Expression GreatCommonDivisor::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/hyperbolic_arc_cosine.cpp

@@ -18,8 +18,8 @@ Expression * HyperbolicArcCosine::clone() const {
 }
 
 Expression HyperbolicArcCosine::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/hyperbolic_arc_sine.cpp

@@ -18,8 +18,8 @@ Expression * HyperbolicArcSine::clone() const {
 }
 
 Expression HyperbolicArcSine::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/hyperbolic_arc_tangent.cpp

@@ -18,8 +18,8 @@ Expression * HyperbolicArcTangent::clone() const {
 }
 
 Expression HyperbolicArcTangent::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/hyperbolic_cosine.cpp

@@ -22,8 +22,8 @@ Expression * HyperbolicCosine::clone() const {
 }
 
 Expression HyperbolicCosine::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/hyperbolic_sine.cpp

@@ -22,8 +22,8 @@ Expression * HyperbolicSine::clone() const {
 }
 
 Expression HyperbolicSine::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/hyperbolic_tangent.cpp

@@ -21,8 +21,8 @@ Expression * HyperbolicTangent::clone() const {
 }
 
 Expression HyperbolicTangent::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/imaginary_part.cpp

@@ -19,8 +19,8 @@ Expression * ImaginaryPart::clone() const {
 
 
 Expression ImaginaryPart::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/integral.cpp

@@ -32,8 +32,8 @@ int Integral::polynomialDegree(char symbolName) const {
 }
 
 Expression Integral::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/least_common_multiple.cpp

@@ -20,8 +20,8 @@ Expression * LeastCommonMultiple::clone() const {
 }
 
 Expression LeastCommonMultiple::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/matrix_dimension.cpp

@@ -17,8 +17,8 @@ Expression * MatrixDimension::clone() const {
 }
 
 Expression MatrixDimension::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING

poincare/src/matrix_inverse.cpp

@@ -20,8 +20,8 @@ Expression * MatrixInverse::clone() const {
 }
 
 Expression MatrixInverse::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/matrix_trace.cpp

@@ -19,8 +19,8 @@ Expression * MatrixTrace::clone() const {
 }
 
 Expression MatrixTrace::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/matrix_transpose.cpp

@@ -18,8 +18,8 @@ Expression * MatrixTranspose::clone() const {
 }
 
 Expression MatrixTranspose::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/permute_coefficient.cpp

@@ -19,8 +19,8 @@ Expression * PermuteCoefficient::clone() const {
 }
 
 Expression PermuteCoefficient::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/prediction_interval.cpp

@@ -26,8 +26,8 @@ int PredictionInterval::polynomialDegree(char symbolName) const {
 }
 
 Expression PredictionInterval::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op0 = editableOperand(0);

poincare/src/real_part.cpp

@@ -17,8 +17,8 @@ Expression * RealPart::clone() const {
 }
 
 Expression RealPart::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
   Expression * op = editableOperand(0);

poincare/src/round.cpp

@@ -20,8 +20,8 @@ Expression * Round::clone() const {
 }
 
 Expression Round::shallowReduce(Context& context, Preferences::AngleUnit angleUnit) const {
-  Expression * e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e != this) {
+  Expression e = Expression::defaultShallowReduce(context, angleUnit);
+  if (e.isUndefinedOrAllocationFailure()) {
     return e;
   }
 #if MATRIX_EXACT_REDUCING