mugicpp

mugicpp

Code generation tool for C++

Instalation

npm i mugicpp --save

Usage

Import

const {acc, qt, cpp, sc, st, CppClass, CppSignature, parseClass, parseMethod, ref, constRef, pointer, constp} = require('mugicpp')

Class

let foo = new CppClass('Foo')
foo.constructor_()
foo.constructor_('int foo, const QString& bar')
foo.destructor().virtual()

This creates class with empty constructor and parametrized constructor and virtual destructor with empty implementation.

Members

foo.member('mBar', cpp.int, 0)
foo.member('mFoo', qt.QString, undefined, {getter: true, setter: false, access: acc.PRIVATE})

This creates int member mBar with default value 0, to which it will be initialized in empty constructor, but in parametrized constructor it will be initialized to bar argument value because members bound to constructor args by name. mBar is protected, mFoo is private. Getters and setters are public by default or have access specified in options, like this: {getter: acc.PROTECTED, setter: acc.PRIVATE} ({getter: true} is the same as {getter: acc.PUBLIC})

Getters and setters

Public getter and setter added for each member unless there is {getter: false, setter: false} in CppClass options or in member options. mBar will have getter function int bar() const and setter void setBar(int value), mFoo will not be initialized in empty constructor and will not have setter. Getter and setter names can be overriden with style CppClass option.

style	getter	setter
st.SETTER_SET_NAME (default)	bar()	setBar(int value)
0	bar()	bar(int value)
st.GETTER_GET_NAME + st.SETTER_SET_NAME	getBar()	setBar(int value)

Methods

foo.method('clearBar', cpp.void, '', 'mBar = 0;').protected()
foo.method('moreThanTen', cpp.bool, 'int a, int b', 'return (a + b) > 10;').static()
foo.method('clicked', cpp.void, '').signal()
foo.method('onClicked', cpp.void, '', 'mBar++;').slot()
foo.method('implementMe', cpp.void, 'int a').pureVirtual()

This creates protected method, static method, signal method, slot method and pure virtual method. Signal and slot can be also writen like this:

foo.signal('clicked', '')
foo.slot('onClicked', '', 'mBar++;')

Functions

Functions declared just like methods

foo.function_('plusTen', cpp.int, 'int b', 'return b + 10;')

Operators

Operator can be declared as method (inside class) or as function (outside class)

foo.methodOperator('+', 'Foo&', 'const Foo& arg', 'mBar += arg.bar(); return *this;')
foo.functionOperator('+', 'Foo', 'const Foo& arg1, const Foo& arg2', 'Foo res(arg1.bar() + arg2.bar()); return res;')

Class members (global variables)

foo.global('count', cpp.int, '0')
foo.global('gFoo', 'Foo', 'Foo()').extern()

This creates static variable int Foo::count and extern variable Foo gFoo

Forward declarations, enums, typedefs, preprocessor expressions

foo.definition('enum Type {TypeA, TypeB};', sc.CLASS)
foo.definition('class Foo;', sc.GLOBAL)
foo.definition('#define ROUND1(a) round((a) * 10.0) / 10.0', sc.IMPLEMENTATION_GLOBAL)

This creates enum in class scope, forward declaration in global scope and definition in cpp file

Includes

All necessary includes added automaticaly if you define classNames in CppClass options, but you can add some manualy.

foo.include('special.h', true, true, false)
foo.include('SomeClass', false, false, true)

This adds to header

#include <special.h>
class SomeClass;

and to cpp

#include "someclass.h"

Inheritance

foo.inherits('BaseFoo')
foo.constructor_('int bar' ,{BaseFoo: 'bar'})

This adds inheritance and passes bar arg to base constructor

Namespace

Class and functions will be defined in namespace if namespace specified in CppClass options

Parsers

If you want to extend existing handwriten class you can either create generated class and inherit from handwriten class or move method implementations from cpp to header and use parseClass function. Also there is parseMethod function.

foo = parseClass(
`class Foo {
public:
    Foo() : mBar(0) {

    }
    void test() {
        cout << "hello world\\n";
    }
protected:
    int mBar;
};`)

foo.method(parseMethod(
`int Foo::minusTen(int b) const {
    return b - 10;
}`
))

Named arguments

If you want to implement "named arguments" pattern, there is CppNamedArgs class for this. It creates two classes - heavy implementation and lightweight stack-friendly proxy with chainable methods that calls implementation methods over a pointer.

Singleton

There is CppClassSingleton for singletons. It is just CppClass with instance() static method and mInstance class variable.

Class group

There is CppClassGroup for creating multiple coupled classes in single pair of source header files.

Only functions

There is CppNoClass for functions-only units.

Signature

Signatures for methods, functions, constructors and operators can be expressed as string or as name: type object. Simple types, references and pointers will be passed by value, all other types (except ones in simpleTypes in CppClass constructor options) will be passed as constant reference.

let foo = new CppClass('Foo', {simpleTypes: ['Bar']})
foo.method('foo', cpp.void, 'int a, const QString& b, Bar c, QString& d')

can be writen as

let foo = new CppClass('Foo', {simpleTypes: ['Bar']})
foo.method('foo', cpp.void, {a: cpp.int, b: qt.QString, c: 'Bar', d: ref(qt.QString)})

To use later form with optional arguments there is CppSignature class with signature(nameValues, nameOptionals) method

let options = {simpleTypes: ['Bar']}
let m = new CppClass('Model', options)
m.inherits('QStandardItemModel')
let s = new CppSignature(options)
m.constructor_(s.signature({rows: cpp.int, columns: cpp.int, parent: pointer(qt.QObject)},{parent: 0}),{QStandardItemModel: 'rows, columns, parent'})

Output

foo.write(__dirname)

This outputs generated code to "foo.h" and "foo.cpp" in specified directory.