mprymek

# Just an example of specialization in Elixir.
#
# I'm not sure if this pattern is a good practice in Elixir or
# it's too much "OOP-like" and it would be more Elixirific to
# use protocols. But using protocols to do the same thing would
# probably lead to more boilerplate code (explicitly define all
# funX in every protocol implementation).
#

mprymek

#
# Another example of specialization in Elixir. This time using
# a protocol.
#
# I think it's a cleaner implementation.
#

defprotocol MyProto do
  def base_data(state)

mprymek

### prvni priklad: a++ jako VYRAZ

$ cat >test1.c <<EOF
#include<stdio.h>
int main() {
  int a = 5;
  printf("%d\n",a++);
  return 0;
}
EOF

mprymek

 /usr/local/bin/g++48   -O2 -pipe -fstack-protector -Wl,-rpath=/usr/local/lib/gcc48 -fno-strict-aliasing  -Wl,-rpath=/usr/local/lib/gcc48 -O2 -pipe -fstack-protector -Wl,-rpath=/usr/local/lib/gcc48 -fno-strict-aliasing  -Wl,-rpath=/usr/local/lib/gcc48   -fstack-protector -Wl,-rpath=/usr/local/lib/gcc48 -L/usr/local/lib/gcc48 -Wl,-z,relro,-z,now CMakeFiles/rpostback.dir/PostbackMain.cpp.o CMakeFiles/rpostback.dir/PostbackOptions.cpp.o  -o rpostback  ../../core/librstudio-core.a -lboost_date_time -lboost_filesystem -lboost_iostreams  -lboost_regex -lboost_signals -lboost_system -lboost_thread -lboost_chrono -lpthread -lutil /usr/local/lib/libuuid.so -lrt -lz /usr/local/lib/libinotify.so /usr/local/lib/libssl.so /usr/local/lib/libcrypto.so -lpam -Wl,-rpath,/usr/local/lib -lboost_program_options
CMakeFiles/rpostback.dir/PostbackOptions.cpp.o: In function `session::postback::Options::read(int, char* const*)':
PostbackOptions.cpp:(.text+0x105): undefined reference to `boost::program_options::options_description::op

mprymek

Symbol table '.dynsym' contains 1116 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 000000000002c858     0 SECTION LOCAL  DEFAULT    9 
     2: 0000000000000000   115 FUNC    GLOBAL DEFAULT  UND std::logic_error::logic_error(char const*)
     3: 0000000000000000   476 FUNC    WEAK   DEFAULT  UND __cxa_finalize@FBSD_1.0 (2)
     4: 0000000000000000   163 FUNC    GLOBAL DEFAULT  UND std::__1::codecvt<wchar_t, char, __mbstate_t>::do_length(__mbstate_t&, char const*, char const*, unsigned long) const
     5: 0000000000000000    24 OBJECT  GLOBAL DEFAULT  UND typeinfo for std::logic_error
     6: 0000000000000000    10 FUNC    GLOBAL DEFAULT  UND std::logic_error::what() const
     7: 0000000000000000    10 FUNC    GLOBAL DEFAULT  UND operator delete[](void*)

mprymek

In file included from /usr/ports/local/rstudio/work/rstudio-rstudio-1c6c7bd/src/cpp/core/r_util/RSessionLaunchProfile.cpp:16:
In file included from /usr/ports/local/rstudio/work/rstudio-rstudio-1c6c7bd/src/cpp/core/include/core/r_util/RSessionLaunchProfile.hpp:19:
In file included from /usr/include/c++/v1/string:439:
/usr/include/c++/v1/algorithm:1720:19: error: no viable overloaded '='
        *__result = *__first;
        ~~~~~~~~~ ^ ~~~~~~~~
/usr/include/c++/v1/algorithm:1744:19: note: in instantiation of function template specialization 'std::__1::__copy<std::__1::__bit_iterator<std::__1::vector<bool, std::__1::allocator<bool> >, true, 0>, std::__1::back_insert_iterator<std::__1::vector<json_spirit::Value_impl<json_spirit::Config_map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > >, std::__1::allocator<json_spirit::Value_impl<json_spirit::Config_map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > > > > >' requested here

mprymek

--- src/cpp/core/CMakeFiles/rstudio-core.dir/r_util/RSessionLaunchProfile.cpp.o ---
/usr/local/bin/cmake -E cmake_progress_report /usr/ports/local/rstudio/work/.build/CMakeFiles
[ 30%] Building CXX object src/cpp/core/CMakeFiles/rstudio-core.dir/r_util/RSessionLaunchProfile.cpp.o
cd /usr/ports/local/rstudio/work/.build/src/cpp/core && /usr/bin/c++   -DBOOST_ASIO_DISABLE_KQUEUE -DBOOST_ENABLE_ASSERT_HANDLER -D_FORTIFY_SOURCE=2 -O2 -pipe -fstack-protector -fno-strict-aliasing -O2 -pipe -fstack-protector -fno-strict-aliasing -isystem /usr/local/include -I/usr/ports/local/rstudio/work/rstudio-rstudio-1c6c7bd/src/cpp/core/include -I/usr/ports/local/rstudio/work/.build/src/cpp/core    -Wall -pthread -Wformat -Wformat-security -fstack-protector --param ssp-buffer-size=4 -pie -fPIE -o CMakeFiles/rstudio-core.dir/r_util/RSessionLaunchProfile.cpp.o -c /usr/ports/local/rstudio/work/rstudio-rstudio-1c6c7bd/src/cpp/core/r_util/RSessionLaunchProfile.cpp
c++: warning: argument unused during compilation: '-pie'
In file inclu

mprymek

$ gcc48 -I /usr/local/include -L/usr/local/lib  -lboost_program_options  boost_test.cpp
/usr/local/bin/ld: /tmp//ccauzjzJ.o: undefined reference to symbol '_ZSt17__throw_bad_allocv'
//usr/lib/libc++.so.1: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status

$ /usr/bin/c++ -I /usr/local/include -L/usr/local/lib  -lboost_program_options  boost_test.cpp

$ ./a.out --help
Basic Command Line Parameter App
Options:

mprymek

## This is a quickstart tutorial for PureScript. Unlike with other tutorials, you don't need
## any build-manager (Grunt etc.) installed globally. We will use locally-installed Gulp.
##
## Prerequisites:
## - cabal (Haskell package manager)
## - npm (Node package manager)
## You will find both of them in your OS' repository.


## install PureScript compiller

mprymek

defmodule SafeCode do

  def compile code do
    # we can use [existing_atoms_only: true] here
    {:ok, qcode} = code |> Code.string_to_quoted()
    unless safe? qcode do
      raise "Code is unsafe"
    else
      qcode |> Code.compile_quoted
    end