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// RUN: %target-typecheck-verify-swift
// FIXME: The clarity of these diagnostics could be improved.
// <rdar://problem/29912193>
func isString(_ s: inout String) {}
func test_UnicodeScalarDoesNotImplementArithmetic(_ us: UnicodeScalar, i: Int) {
var a1 = "a" + "b" // OK
isString(&a1)
// We don't check for the overload choices list on the overload note match because they may change on different platforms.
let a2 = "a" - "b" // expected-error {{binary operator '-' cannot be applied to two 'String' operands}}
let a3 = "a" * "b" // expected-error {{binary operator '*' cannot be applied to two 'String' operands}}
let a4 = "a" / "b" // expected-error {{binary operator '/' cannot be applied to two 'String' operands}}
let b1 = us + us // expected-error {{binary operator '+' cannot be applied to two 'UnicodeScalar' (aka 'Unicode.Scalar') operands}}
let b2 = us - us // expected-error {{binary operator '-' cannot be applied to two 'UnicodeScalar' (aka 'Unicode.Scalar') operands}}
let b3 = us * us // expected-error {{binary operator '*' cannot be applied to two 'UnicodeScalar' (aka 'Unicode.Scalar') operands}}
// DurationProtocol is a near miss here
let b4 = us / us // expected-error {{referencing operator function '/' on 'DurationProtocol' requires that 'UnicodeScalar' (aka 'Unicode.Scalar') conform to 'DurationProtocol'}}
let c1 = us + i // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
let c2 = us - i // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
let c3 = us * i // expected-note {{overloads for '*' exist with these partially matching parameter lists: (Int, Int)}}
// expected-error@-1 {{binary operator '*' cannot be applied to operands of type 'UnicodeScalar' (aka 'Unicode.Scalar') and 'Int'}}
let c4 = us / i // expected-note {{overloads for '/' exist with these partially matching parameter lists: (Int, Int)}}
// expected-error@-1 {{binary operator '/' cannot be applied to operands of type 'UnicodeScalar' (aka 'Unicode.Scalar') and 'Int'}}
let d1 = i + us // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
let d2 = i - us // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
let d3 = i * us // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
let d4 = i / us // expected-error {{cannot convert value of type 'UnicodeScalar' (aka 'Unicode.Scalar') to expected argument type 'Int'}}
}
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