Difference between Static and StaticString [duplicate]

Question

I confuse with

static var str = "Hello1"

var str2: StaticString = "Hello2"

What is the best case to use StaticString?

How is static and StaticString allocate memory?

Blacksmith · Accepted Answer · 2022-07-30 05:18:14Z

1

static string can be known at the compile time.

let str1: String = "str1" // ok
let str2: String = "\(str1) + 1" // ok
let str3: StaticString = "\(str1)" // illegal

StaticString has to be known.

let foo: StaticString = "foo" // ok

personally, i have only seen this used when creating some sort of a signpost functionality to test performance on the instruments

answered Jul 30, 2022 at 5:18

Blacksmith

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