djinni.md

Interfaces: like abstract base classes

interfaceName = interface +j +o {
    const constantA: i32 = 10;

    methodA(argumentA: i32): returnType;
    methodB();

    static staticMethod(): returnType;
}

• Create an interface in Java (+j) and Objective-C (+o), called by C++. Java and Obj-C implement the methods.

interfaceName = interface +c {
    const constantA: i32 = 10;

    methodA(argumentA: i32): returnType;
    methodB();
    const methodC(): returnType;

    static staticMethod(): returnType;
}

• Create an interface in C++ (+c)), called by Java and Obj-C. C++ implement the methods.

Records: like structs

recordName = record {
    attributeA: typeA;
    attributeB: typeB;
    attributeC: string;
} deriving (eq, ord)

• Create a record with equality comparison (eq) and ordering comparison (ord)

Enums: like scoped enums

enumName = enum {
    optionA;
    optionB;
    optionC;
}

Data types:

Data Type	Syntax	C++	Java	Obj-C
Boolean	bool	bool	boolean	BOOL
Primitives	i8,i16,i32,i64,f32,f64
Strings	string	std::string	String	NSString
Binary	binary	std::vector<uint8_t>	byte[]	NSData
Date	date	chrono::system_clock::time_point	Date	NSDate
List	list<type>	std::vector	ArrayList	NSArray
Set	set<type>	std::unordered_set	HashSet	NSSet
Map	map<typeA, typeB>	std::unordered_map<K,V>	HashMap	NSDictionary
Optionals	optional<typeA>	std::experimental::optional	object / boxed primitive reference	object / NSNumber strong reference

Copyright © 2017 Alex Choi