Swift is a new programming language developed by Apple for building apps for iOS, macOS, watchOS and tvOS. It is designed to be more modern, interactive and safe than Objective-C. Swift aims to make app development on Apple's platforms easier by unifying procedural and object-oriented language features and improving performance by removing legacy language baggage. The first beta of Xcode 6 offers a development platform for Swift and supports Mac OS X 10.9.3 and higher.

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SWIFT
APPLE’S OVEN FRESH LANGUAGE
(RELEASE DATE: June,2-2014)

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PERSPECTIVE
 According to Greg Federighi,
(Apple senior vice president for software engineering)
"Swift is fast, it is modern, it is designed
for safety, and it enables a level of
interactivity and development that you've
never seen before on the platform."

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SWIFT & ITS PURPOSE
 To make development of apps for Apple's mobile
platform easier.
 To unify the procedural and object-oriented
portions of the language.
 Improve performance of App by removing
baggage's of legacy language

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TECHNICAL SPECIFICATION
 Xcode V6 beta offers development
platform for Swift
 Xcode V6 beta is compatible on MAC OS X
10.9.3 and above

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FEATURES OF SWIFT

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COMPARISON
 Objective-C is a hard language to pick up for
new developers.
 Swift makes getting started with app
development on Apple’s platforms easier.
 Swift feels more accessible than Objective-C.
 Swift is 3.9 times faster while objective-C is
2.8 times faster than python.

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LEXICAL STRUCTURE
 The lexical structure of Swift describes
what sequence of characters form valid
tokens of the language.
 These valid tokens form the lowest-level
building blocks of the language.
 They are used to describe the rest of the
language.

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GRAMMAR
Grammar
Statements
declarations
patterns
attributes
expressions
types

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GRAMMAR OF SWIFT
Grammar
STATEMENTS
declarations
patterns
attributes
expressions
types
expressionopt
declarationopt
loop-
statementopt
branch-
statementopt
labelled-
statement
control-transfer-
statementopt
statement
statementsopt

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GRAMMAR OF DECLARATION
Grammar
statements
DECLARATIONS
patterns
attributes
expressions
types
import constant variable typealias function enum struct
class
protocol
initializer
deinitializer
extension
subscript
operator
declaration
declarationsopt

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GRAMMAR OF PATTERN
Grammar
Statements
declarations
PATTERNS
attributes
expressions
types
wildcard-
pattern
type-
annotationopt
identifier-
pattern
type-
annotationopt
value-
binding-
pattern
tuple-pattern
type-
annotationopt
enum-
case-
pattern
type-
casting-
pattern
expression
-pattern

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GRAMMAR OF ATTRIBUTES
Grammar
statements
declarations
patterns
ATTRIBUTES
expressions
types
Attribute :-
@ attribute-
name
attribute-
argument-
clauseopt
Attribute-
name :-
identifier
Attribute-
argument-
clause :-
(balanced-
tokensopt)
Attributes :-
attribute
attributesopt

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GRAMMAR OF EXPRESSIONS
Grammar
statements
declarations
patterns
attributes
EXPRESSIONS
types
Expression:-
prefix-
expression
binary-
expressionsopt
Expression
List:-
expression|
expression ,
expression-
list

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GRAMMAR OF TYPES
Grammar
statements
declarations
patterns
attributes
expressions
TYPES
•array-type
•function-type
•type-identifier
•tuple-type
•optional-type
•implicitly-unwrapped-optional-type
•protocol-composition-type
•metatype-type

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REFERENCES
 For more information:
◦ Apple has released a guidebook for the
language in iBooks Store.
◦ InfoWorld.com

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