python-style variables in c++

You can use boost.variant library. Basic usage instructions here. In short, it would be something like

using var_t = boost::variant<bool,int,double,string, boost::blank_t>;
   var_t var = "hello";
   std::cout << boost::get<std::string>(var) << '\n' ; std::cout << var << '\n' ; // if all possible stored types are streamable

Suggestion : 2

Dec 02, 2014

static
const int primes = 0b10100000100010100010100010101100;

const char * path = R "(c:\this\string\has\backslashes)";

for x in myList:
   print(x)

for (int x: myList)
   std::cout << x;

x = "Hello world!"
print(x)

auto x = "Hello world!";
std::cout << x;

Suggestion : 3

Call Python or Lua from C++ to evaluate an expression, calculating unknown variables only if needed,How can I declare and define multiple variables in one line using C++?,Where are static variables stored in C and C++?,Initialization of a return value should ignore constness of automatic object

You can use boost.variant library. Basic usage instructions here. In short, it would be something like

using var_t = boost::variant<bool,int,double,string, boost::blank_t>;
   var_t var = "hello";
   std::cout << boost::get<std::string>(var) << '\n' ; std::cout << var << '\n' ; // if all possible stored types are streamable

Suggestion : 4

Pay attention to punctuation, spelling, and grammar; it is easier to read well-written comments than badly written ones.,File comments describe the contents of a file. If a file declares, implements, or tests exactly one abstraction that is documented by a comment at the point of declaration, file comments are not required. All other files must have file comments.,Comments should be as readable as narrative text, with proper capitalization and punctuation. In many cases, complete sentences are more readable than sentence fragments. Shorter comments, such as comments at the end of a line of code, can sometimes be less formal, but you should be consistent with your style.,Types of things to mention in comments at the function declaration:

#include

// b.h:
struct B {};
struct D: B {};

// good_user.cc:
#include "b.h"

void f(B * );
void f(void * );
void test(D * x) {
   f(x);
} // Calls f(B*)

Namespaces wrap the entire source file after includes, gflags definitions/declarations and forward declarations of classes from other namespaces.

// In the .h file
namespace mynamespace {

   // All declarations are within the namespace scope.
   // Notice the lack of indentation.
   class MyClass {
      public:
         ...
         void Foo();
   };

} // namespace mynamespace

// In the .h file
namespace mynamespace {

// All declarations are within the namespace scope.
// Notice the lack of indentation.
class MyClass {
 public:
  ...
  void Foo();
};

}  // namespace mynamespace

// In the .cc file
namespace mynamespace {

   // Definition of functions is within scope of the namespace.
   void MyClass::Foo() {
      ...
   }

} // namespace mynamespace

More complex .cc files might have additional details, like flags or using-declarations.

#include "a.h"

ABSL_FLAG(bool, someflag, false, "a flag");

namespace mynamespace {

   using::foo::Bar;

   ...code
   for mynamespace... // Code goes against the left margin.

} // namespace mynamespace

You may not use a using-directive to make all names from a namespace available.

// Forbidden -- This pollutes the namespace.
using namespace foo;

Do not use Namespace aliases at namespace scope in header files except in explicitly marked internal-only namespaces, because anything imported into a namespace in a header file becomes part of the public API exported by that file.

// Shorten access to some commonly used names in .cc files.
namespace baz = ::foo::bar::baz;

// Shorten access to some commonly used names in .cc files.
namespace baz = ::foo::bar::baz;

// Shorten access to some commonly used names (in a .h file).
namespace librarian {
   namespace impl { // Internal, not part of the API.
      namespace sidetable = ::pipeline_diagnostics::sidetable;
   } // namespace impl

   inline void my_inline_function() {
      // namespace alias local to a function (or method).
      namespace baz = ::foo::bar::baz;
      ...
   }
} // namespace librarian

Use braced-initialization as needed to create 64-bit constants. For example:

int64_t my_value {
   0x123456789
};
uint64_t my_mask {
   uint64_t {
      3
   } << 48
};

template <typename T>
   void f(T t);

   f(0); // Invokes f<int>(0)

Suggestion : 5

MixedCase variable in global scope. See Naming Conventions for Science Pipelines.,MixedCase variable in class scope. See Naming Conventions for Science Pipelines.,Variable in function should be lowercase. See Naming Conventions for Science Pipelines.,Camelcase imported as lowercase. See Naming Conventions for Science Pipelines.

[flake8]
max - line - length = 110
max - doc - length = 79
ignore = E133, E226, E228, N802, N803, N806, N812, N813, N815, N816, W503
exclude =
   bin,
   doc, **
   /*/__init__.py,
    **/
   * /version.py,
tests / .tests

from.module
import AClass # noqa: F401

autopep8.--in - place--recursive\
   --ignore E133, E226, E228, N802, N803, N806, W503--max - line - length 110

# This file is part of {{ cookiecutter.package_name }}.
#
# Developed for the LSST Data Management System.
# This product includes software developed by the LSST Project
# (https://www.lsst.org).
# See the COPYRIGHT file at the top-level directory of this distribution
# for details of code ownership.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

class Rectangle(Blob):
   ""
"Documentation for Rectangle.
""
"
def __init__(self, width, height,
      color = 'black', emphasis = None, highlight = 0):

   # Discouraged: continuation with '\'
if width == 0 and height == 0\
and color == 'red'
and emphasis == 'strong'\
or highlight > 100:
   raise ValueError("sorry, you lose")

# Preferred: continuation with parentheses
if width == 0 and height == 0 and(color == 'red'
      or emphasis is None):
   raise ValueError("I don't think so")

Blob.__init__(self, width, height,
   color, emphasis, highlight)

if (width == 0 and height == 0):
   pass