C++ Code Generator

Simple and straightforward code generator for creating C++ code. It also could be used for generating code in any programming language. Written in Python, works both with Python 2 and 3

Every C++ element could render its current state to a string that could be evaluated as a legal C++ construction. Some elements could be rendered to a pair of representations (C++ classes and functions declaration and implementation)

Special thanks

Thanks to Eric Reynolds, the idea of this project mainly based on his article published on http://www.codeproject.com/Articles/571645/Really-simple-Cplusplus-code-generation-in-Python

However, this solution has been both simplified and extended compared to the initial idea.

Usage examples

Generate C++ code from Python code

1 Creating variables

1.1 Python code

cpp = CodeFile('example.cpp')
cpp('int i = 0;')

1.2 Generated C++ code

int i = 0;

2 Creating classes and structures

2.1 Python code

cpp = CppFile('example.cpp')
with cpp.block('class A', ';'):
    cpp.label('public:')
    cpp('int m_classMember1;')
    cpp('double m_classMember2;')

2.2 Generated C++ code

class A
{
public:
    int m_classMember1;
    double m_classMember2;
};

3 Rendering CppClass objects to C++ declaration and implementation

3.1 Python code

cpp_class.add_variable(CppVariable(name = "m_var",
    type = 'size_t',
    is_static = True,
    is_const = True,
    initialization_value = 255))

3.2 Generated C++ declaration

{
    static const size_t m_var;
}

3.3 Generated C++ implementation

const size_t MyClass::m_var = 255;

Module cpp_generator.py highly depends on parent code_generator.py, as it uses code generating and formatting primitives implemented there.

The main object referenced from code_generator.py is CppFile, which is passed as a parameter to render_to_string(cpp) Python method

It could also be used for composing more complicated C++ code, that does not supported by cpp_generator

Class ANSICodeStyle is responsible for code formatting. Re-implement it if you wish to apply any other formatting style.

It support:

• functional calls:

cpp('int a = 10;')

• with semantic:

with cpp.block('class MyClass', ';')
    class_definition(cpp)

• append code to the last string without EOL:

cpp.append(', p = NULL);')

• empty lines:

cpp.newline(2)