1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// RUN: %target-swift-emit-silgen -import-objc-header %S/Inputs/readbytes.h %s -o /dev/null -verify
//
// REQUIRES: objc_interop
//
// Diagnose invalid conversion from an inout Data argument to a raw pointer.
import Foundation
func readBytes(_ pointer: UnsafeRawPointer) {}
func writeBytes(_ pointer: UnsafeMutableRawPointer) {}
// SILGen diagnostics prohibits these implicit casts:
func test_errors(darg: Data) {
var data: Data = darg
readBytes(&data) // expected-warning {{forming 'UnsafeRawPointer' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
writeBytes(&data) // expected-warning {{forming 'UnsafeMutableRawPointer' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
read_char(&data) // expected-warning {{forming 'UnsafePointer<Int8>' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
write_char(&data) // expected-warning {{forming 'UnsafeMutablePointer<Int8>' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
read_uchar(&data) // expected-warning {{forming 'UnsafePointer<UInt8>' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
write_uchar(&data) // expected-warning {{forming 'UnsafeMutablePointer<UInt8>' to a variable of type 'Data'; this is likely incorrect because 'Data' may contain an object reference.}}
}
// Test the explicit cast workaround for all of the above errors
func test_explicit(darg: Data) {
var data: Data = darg
data.withUnsafeBytes() {
readBytes($0.baseAddress!)
read_char($0.baseAddress!)
read_uchar($0.baseAddress!)
}
data.withUnsafeMutableBytes() {
writeBytes($0.baseAddress!)
write_char($0.baseAddress!)
write_uchar($0.baseAddress!)
}
}
|
