Shorthand Operator

Prefer shorthand operators (+=, -=, *=, /=) over doing the operation and assigning.

• Identifier: shorthand_operator
• Enabled by default: Enabled
• Supports autocorrection: No
• Kind: style
• Analyzer rule: No
• Minimum Swift compiler version: 3.0.0
• Default configuration: error

Non Triggering Examples

foo -= 1

foo -= variable

foo -= bar.method()

self.foo = foo - 1

foo = self.foo - 1

page = ceilf(currentOffset - pageWidth)

foo = aMethod(foo - bar)

foo = aMethod(bar - foo)

foo /= 1

foo /= variable

foo /= bar.method()

self.foo = foo / 1

foo = self.foo / 1

page = ceilf(currentOffset / pageWidth)

foo = aMethod(foo / bar)

foo = aMethod(bar / foo)

foo += 1

foo += variable

foo += bar.method()

self.foo = foo + 1

foo = self.foo + 1

page = ceilf(currentOffset + pageWidth)

foo = aMethod(foo + bar)

foo = aMethod(bar + foo)

foo *= 1

foo *= variable

foo *= bar.method()

self.foo = foo * 1

foo = self.foo * 1

page = ceilf(currentOffset * pageWidth)

foo = aMethod(foo * bar)

foo = aMethod(bar * foo)

var helloWorld = "world!"
 helloWorld = "Hello, " + helloWorld

angle = someCheck ? angle : -angle

seconds = seconds * 60 + value

Triggering Examples

↓foo = foo - 1

↓foo = foo - aVariable

↓foo = foo - bar.method()

↓foo.aProperty = foo.aProperty - 1

↓self.aProperty = self.aProperty - 1

↓foo = foo / 1

↓foo = foo / aVariable

↓foo = foo / bar.method()

↓foo.aProperty = foo.aProperty / 1

↓self.aProperty = self.aProperty / 1

↓foo = foo + 1

↓foo = foo + aVariable

↓foo = foo + bar.method()

↓foo.aProperty = foo.aProperty + 1

↓self.aProperty = self.aProperty + 1

↓foo = foo * 1

↓foo = foo * aVariable

↓foo = foo * bar.method()

↓foo.aProperty = foo.aProperty * 1

↓self.aProperty = self.aProperty * 1

n = n + i / outputLength

n = n - i / outputLength