mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
938e7c2676
This allows UnicodeScalars to be constructed from an integer, rather then from a string. Not only this avoids an unnecessary memory allocation (!) when creating a UnicodeScalar, this also allows the compiler to statically check that the string contains a single scalar value (in the same way the compiler checks that Character contains only a single extended grapheme cluster). rdar://17966622 Swift SVN r21198
28 lines
1.9 KiB
Swift
28 lines
1.9 KiB
Swift
// RUN: %swift %s -parse -verify
|
|
|
|
func isString(inout s: String) {}
|
|
|
|
func test_UnicodeScalarDoesNotImplementArithmetic(us: UnicodeScalar, i: Int) {
|
|
var a1 = "a" + "b" // OK
|
|
isString(&a1)
|
|
let a2 = "a" - "b" // expected-error {{type 'UInt8' does not conform to protocol 'UnicodeScalarLiteralConvertible'}}
|
|
let a3 = "a" * "b" // expected-error {{type 'UInt8' does not conform to protocol 'UnicodeScalarLiteralConvertible'}}
|
|
let a4 = "a" / "b" // expected-error {{type 'UInt8' does not conform to protocol 'UnicodeScalarLiteralConvertible'}}
|
|
|
|
let b1 = us + us // expected-error {{cannot invoke '+' with an argument list of type '(UnicodeScalar, UnicodeScalar)'}}
|
|
let b2 = us - us // expected-error {{cannot invoke '-' with an argument list of type '(UnicodeScalar, UnicodeScalar)'}}
|
|
let b3 = us * us // expected-error {{cannot invoke '*' with an argument list of type '(UnicodeScalar, UnicodeScalar)'}}
|
|
let b4 = us / us // expected-error {{cannot invoke '/' with an argument list of type '(UnicodeScalar, UnicodeScalar)'}}
|
|
|
|
let c1 = us + i // expected-error {{cannot invoke '+' with an argument list of type '(UnicodeScalar, Int)'}}
|
|
let c2 = us - i // expected-error {{cannot invoke '-' with an argument list of type '(UnicodeScalar, Int)'}}
|
|
let c3 = us * i // expected-error {{cannot invoke '*' with an argument list of type '(UnicodeScalar, Int)'}}
|
|
let c4 = us / i // expected-error {{cannot invoke '/' with an argument list of type '(UnicodeScalar, Int)'}}
|
|
|
|
let d1 = i + us // expected-error {{cannot invoke '+' with an argument list of type '(Int, UnicodeScalar)'}}
|
|
let d2 = i - us // expected-error {{cannot invoke '-' with an argument list of type '(Int, UnicodeScalar)'}}
|
|
let d3 = i * us // expected-error {{cannot invoke '*' with an argument list of type '(Int, UnicodeScalar)'}}
|
|
let d4 = i / us // expected-error {{cannot invoke '/' with an argument list of type '(Int, UnicodeScalar)'}}
|
|
}
|
|
|