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[CSSimplify] Detect and diagnose Swift -> C pointer conversion failures

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Detect and diagnose situations when Swift -> C pointer conversion
is unsupported due to method not being imported from C header.
This commit is contained in:
Pavel Yaskevich
2021-08-23 21:58:48 -07:00
parent 25762c25ee
commit a9fdb7ad66
3 changed files with 76 additions and 24 deletions
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26
test/Constraints/swift_to_c_pointer_conversions.swift.gyb
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@@ -243,3 +243,29 @@ func test_overloaded_ref_is_not_ambiguous() {
const_char_ptr_func(overloaded_func()) // Ok
const_opt_char_ptr_func(overloaded_func()) // Ok
}
func test_tailored_diagnostic(ptr: UnsafeRawPointer, tptr: UnsafePointer<Int8>) {
func swift_uint8_func(_: UnsafePointer<UInt8>) {}
func swift_int8_func(_: UnsafePointer<Int8>) {}
func opt_arg_func(_: UnsafePointer<Int8>?) {}
swift_uint8_func(ptr)
// expected-error@-1 {{cannot convert value of type 'UnsafeRawPointer' to expected argument type 'UnsafePointer<UInt8>' because local function 'swift_uint8_func' was not imported from C header}}
swift_uint8_func(tptr)
// expected-error@-1 {{cannot convert value of type 'UnsafePointer<Int8>' to expected argument type 'UnsafePointer<UInt8>' because local function 'swift_uint8_func' was not imported from C header}}
swift_int8_func(ptr)
// expected-error@-1 {{cannot convert value of type 'UnsafeRawPointer' to expected argument type 'UnsafePointer<Int8>' because local function 'swift_int8_func' was not imported from C header}}
swift_int8_func(tptr) // Ok
opt_arg_func(ptr)
// expected-error@-1 {{cannot convert value of type 'UnsafeRawPointer' to expected argument type 'UnsafePointer<Int8>?' because local function 'opt_arg_func' was not imported from C header}}
opt_arg_func(tptr) // Ok
let optrS8: UnsafePointer<Int8>? = nil
let optrU8: UnsafePointer<UInt8>? = nil
opt_arg_func(optrS8) // Ok
opt_arg_func(optrU8)
// expected-error@-1 {{cannot convert value of type 'UnsafePointer<UInt8>?' to expected argument type 'UnsafePointer<Int8>?' because local function 'opt_arg_func' was not imported from C header}}
}