Show the operator fields in the driver (#1103)

* Show the operator fields in the driver

src/driver/main.cpp

@@ -505,8 +505,10 @@ struct roctx : command<roctx>
 struct op : command<op>
 {
     bool show_ops = false;
+    std::string op_name{};
     void parse(argument_parser& ap)
     {
+        ap(op_name, {}, ap.metavar("<MIGraphX operator name>"));
         ap(show_ops,
            {"--list", "-l"},
            ap.help("List all the operators of MIGraphX"),
@@ -519,6 +521,12 @@ struct op : command<op>
             for(const auto& name : get_operators())
                 std::cout << name << std::endl;
         }
+        else
+        {
+            auto op = load_op(op_name);
+            std::cout << op_name << ": " << std::endl;
+            std::cout << to_pretty_json_string(op.to_value()) << std::endl;
+        }
     }
 };
 

src/include/migraphx/json.hpp

@@ -8,6 +8,7 @@
 namespace migraphx {
 inline namespace MIGRAPHX_INLINE_NS {
 
+std::string to_pretty_json_string(const value& val, std::size_t indent = 4);
 std::string to_json_string(const value& val);
 value from_json_string(const std::string& str);
 value from_json_string(const char* str, std::size_t size);

src/json.cpp

@@ -133,6 +133,12 @@ std::string to_json_string(const value& val)
     return j.dump();
 }
 
+std::string to_pretty_json_string(const value& val, std::size_t indent)
+{
+    json j = val;
+    return j.dump(indent);
+}
+
 migraphx::value from_json_string(const char* str, std::size_t size)
 {
     json j = json::parse(str, str + size);