@Override
  public void visitUnaryPlusExpression(UnaryPlusExpression expr) {
    UnaryPlusExpression result = new UnaryPlusExpression(
        replaceExpr(expr.getExpression())
    );
    result.setType(expr.getType());
    result.setSourcePosition(expr);
    replaceVisitedExpressionWith(result);
  }
Groovy AST visitor that allows to replace both statements and expressions.

@author Peter Niederwieser
spock-core/src/main/java/org/spockframework/compiler/ExpressionReplacingVisitorSupport.java