forwards.h doesn't declare most useful classes

[abigailbunyan]

json/forwards.h forward declares the deprecated FastWriter and Reader, but not the non-deprecated replacements StreamWriter and CharReader.

[dota17]

I've tried to add declaration class StreamWriter and class CharReader in the forwards.h then execute make command the result is：
`[ 11%] Building CXX object src/lib_json/CMakeFiles/jsoncpp_lib.dir/json_reader.cpp.o
In file included from /software/jsoncpp-1.8.4/include/json/features.h:10:0,
from /software/jsoncpp-1.8.4/include/json/reader.h:10,
from /software/jsoncpp-1.8.4/src/lib_json/json_reader.cpp:9:

/software/jsoncpp-1.8.4/include/json/forwards.h:21:7: error: multiple types in one declaration
class Reader;
^
/software/jsoncpp-1.8.4/include/json/forwards.h:25:7: error: multiple types in one declaration
class Features;
^
src/lib_json/CMakeFiles/jsoncpp_lib.dir/build.make:62: recipe for target 'src/lib_json/CMakeFiles/jsoncpp_lib.dir/json_reader.cpp.o' failed
make[2]: *** [src/lib_json/CMakeFiles/jsoncpp_lib.dir/json_reader.cpp.o] Error 1
CMakeFiles/Makefile2:114: recipe for target 'src/lib_json/CMakeFiles/jsoncpp_lib.dir/all' failed
make[1]: *** [src/lib_json/CMakeFiles/jsoncpp_lib.dir/all] Error 2
Makefile:140: recipe for target 'all' failed
make: *** [all] Error 2
` But I don't know why the class Features multipled declared here. Is there anyone could explain it?

[abigailbunyan]

That sounds like you're just missing a semicolon:

class Foo
class Bar;
//    ^~~ error: multiple types in one declaration

class Foo {}
class Bar;
//    ^~~ error: multiple types in one declaration

[dota17]

@abigailbunyan You said it! Thank you bro!