completed experimental dump() extension

README.md

@@ -449,7 +449,7 @@ $ make
 $ ./json_unit "*"
 
 ===============================================================================
-All tests passed (5568705 assertions in 31 test cases)
+All tests passed (5568724 assertions in 32 test cases)
 ```
 
 For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).

doc/examples/dump.cpp

@@ -17,4 +17,12 @@ int main()
     std::cout << j_array.dump(-1) << "\n\n";
     std::cout << j_array.dump(0) << "\n\n";
     std::cout << j_array.dump(4) << "\n\n";
+
+    // user-defined printer: do not separate array values with newlines
+    json::printer my_printer = json::printer::pretty_printer();
+    my_printer.array_comma = ", ";
+
+    // call dump() with user-defined printer
+    std::cout << j_object.dump(4, my_printer) << "\n\n";
+    std::cout << j_array.dump(4, my_printer) << std::endl;
 }

doc/examples/dump.link

@@ -1 +1 @@
-<a target="_blank" href="http://melpon.org/wandbox/permlink/PjtHNsrmmgEeCFVp"><b>online</b></a>
+<a target="_blank" href="http://melpon.org/wandbox/permlink/o2gypyOpAA1Z4LKT"><b>online</b></a>

doc/examples/dump.output

@@ -32,3 +32,11 @@
     16
 ]
 
+{
+    "one": 1,
+    "two": 2
+}
+
+[
+    1, 2, 4, 8, 16
+]