package main

import (
	"go/parser"
	"go/printer"
	"go/token"
	"os"
)

const input = `package main

// leading comment
type x int // comment2

`

func main() {
	fset := token.NewFileSet()
	f, err := parser.ParseFile(fset, "input.go", input, parser.ParseComments)
	if err != nil {
		panic(err)
	}
	printer.Fprint(os.Stdout, fset, f.Decls[0])
	printer.Fprint(os.Stdout, fset, &printer.CommentedNode{Node: f.Decls[0], Comments: f.Comments})
}

// leading comment
type x int	// comment2
// leading comment
type x int	// comment2

// leading comment
type x int	// comment2
// leading comment
type x int

go version devel +760636d55a Thu Jun 8 23:54:27 2017 +0000 darwin/amd64
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/hiro/.go"
GORACE=""
GOROOT="/Users/hiro/go"
GOTOOLDIR="/Users/hiro/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build669466350=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOROOT/bin/go version: go version devel +760636d55a Thu Jun 8 23:54:27 2017 +0000 darwin/amd64
GOROOT/bin/go tool compile -V: compile version devel +760636d55a Thu Jun 8 23:54:27 2017 +0000 X:framepointer
uname -v: Darwin Kernel Version 16.6.0: Fri Apr 14 16:21:16 PDT 2017; root:xnu-3789.60.24~6/RELEASE_X86_64
ProductName:	Mac OS X
ProductVersion:	10.12.5
BuildVersion:	16F73
lldb --version: lldb-370.0.42
  Swift-3.1
gdb --version: GNU gdb (GDB) 7.12.1