Dear Swift Evolution Group Members,
Recently, as I was reviewing some code that I wrote, I was wondering
what the community’s thoughts are on the possible value of having a special “if
let” self-assignment operator added to the language (such as =? ). A sort of
syntactic sugar that allows for optional unwrapping into a scoped variable of
the same name as the variable in the larger scope. Here is some before and
after code of what I am contemplating:
Current:
var str:String?
str = "Hello"
if let str = str {
print(str)
}
Abbreviated:
var str:String?
str = “Hello” // Output is Hello, not Optional(“Hello”)
if let str =? {
print(str) // Output is also Hello, not Optional(“Hello”)
}
The value that I perceive of adding this to the language would be to allow a
short-hand way to unwrap in a “if let" conditional and allowing developers to
reduce duplication when a unique variable name is not needed. By the way, I’m
a big fan of ternary operators which the community already sees of value.
Let me know your thoughts. Is this something that could be put into a proposal?
Cheers,
—Nick—
.
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