Remove extra boost (#86)

* Add own make_unique implementation
* Remove usage of boost.multiprecission

.github/workflows/revdepcheck.yaml

@@ -48,7 +48,7 @@ jobs:
                                    "revdep",
                                    repos = "https://cloud.r-project.org/")
           tools::check_packages_in_dir("revdep",
-                                       check_args = "--as-cran --no-manual",
+                                       check_args = "--no-manual",
                                        Ncpus = 4)
           tools::summarize_check_packages_in_dir_results("revdep")
 

inst/include/dqrng_generator.h

@@ -24,16 +24,17 @@
 #include <dqrng_types.h>
 #include <xoshiro.h>
 #include <pcg_random.hpp>
-#include <boost/multiprecision/cpp_int.hpp>
 #include <Rcpp.h>
 #include <convert_seed.h>
 #include <R_randgen.h>
 
 #if defined(__cpp_lib_make_unique) && (__cpp_lib_make_unique >= 201304)
 using std::make_unique;
 #else
-#include <boost/smart_ptr/make_unique.hpp>
-using boost::make_unique;
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args&&... args) {
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
 #endif
 
 namespace dqrng {
@@ -102,10 +103,11 @@ inline void random_64bit_wrapper<::dqrng::xoshiro256starstar>::set_stream(result
 template<>
 inline void random_64bit_wrapper<pcg64>::set_stream(result_type stream) {
   // set the stream relative to the current stream, i.e. stream = 0 does not change the RNG
-  boost::multiprecision::uint128_t number;
-  std::vector<boost::multiprecision::uint128_t> state;
+  pcg_extras::pcg128_t number;
+  std::vector<pcg_extras::pcg128_t> state;
   std::stringstream iss;
   iss << gen;
+  using pcg_extras::operator>>;
   while (iss >> number)
     state.push_back(number);
   // state[1] is the current stream