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added darwin_objc incorrect usage tests
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‎tests/ui/darwin-objc/darwin-objc-bad-arg.rs‎

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// Test that `objc::class!` and `objc::selector!` only take string literals.
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//@ edition: 2024
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//@ only-apple
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#![feature(darwin_objc)]
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use std::os::darwin::objc;
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pub fn main() {
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let s = "NSObject";
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objc::class!(s);
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//~^ ERROR attribute value must be a literal
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objc::class!(NSObject);
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//~^ ERROR attribute value must be a literal
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objc::class!(123);
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//~^ ERROR malformed `rustc_objc_class` attribute input [E0539]
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let s = "alloc";
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objc::selector!(s);
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//~^ ERROR attribute value must be a literal
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objc::selector!(alloc);
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//~^ ERROR attribute value must be a literal
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objc::selector!(123);
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//~^ ERROR malformed `rustc_objc_selector` attribute input [E0539]
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}

‎tests/ui/darwin-objc/darwin-objc-bad-arg.stderr‎

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error: attribute value must be a literal
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--> $DIR/darwin-objc-bad-arg.rs:12:18
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|
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LL | objc::class!(s);
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| ^
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error: attribute value must be a literal
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--> $DIR/darwin-objc-bad-arg.rs:15:18
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|
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LL | objc::class!(NSObject);
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| ^^^^^^^^
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WARN rustc_errors::emitter Invalid span $SRC_DIR/core/src/os/darwin/objc.rs:LL:COL (#6), error=SourceNotAvailable { filename: Real(Remapped { local_path: None, virtual_name: "$SRC_DIR/core/src/os/darwin/objc.rs" }) }
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error[E0539]: malformed `rustc_objc_class` attribute input
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--> $DIR/darwin-objc-bad-arg.rs:18:5
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|
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LL | objc::class!(123);
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| ^^^^^^^^^^^^^---^
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| | |
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| | expected a string literal here
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| help: must be of the form: `#[rustc_objc_class = "ClassName"]`
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|
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= note: this error originates in the macro `objc::class` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: attribute value must be a literal
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--> $DIR/darwin-objc-bad-arg.rs:22:21
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|
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LL | objc::selector!(s);
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| ^
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error: attribute value must be a literal
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--> $DIR/darwin-objc-bad-arg.rs:25:21
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|
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LL | objc::selector!(alloc);
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| ^^^^^
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WARN rustc_errors::emitter Invalid span $SRC_DIR/core/src/os/darwin/objc.rs:LL:COL (#9), error=SourceNotAvailable { filename: Real(Remapped { local_path: None, virtual_name: "$SRC_DIR/core/src/os/darwin/objc.rs" }) }
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error[E0539]: malformed `rustc_objc_selector` attribute input
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--> $DIR/darwin-objc-bad-arg.rs:28:5
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|
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LL | objc::selector!(123);
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| ^^^^^^^^^^^^^^^^---^
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| | |
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| | expected a string literal here
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| help: must be of the form: `#[rustc_objc_selector = "methodName"]`
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|
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= note: this error originates in the macro `objc::selector` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 6 previous errors
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For more information about this error, try `rustc --explain E0539`.

‎tests/ui/darwin-objc/darwin-objc-bad-const.rs‎

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// Test that `objc::class!` and `objc::selector!` aren't `const` expressions.
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// The system gives them their final values at dynamic load time.
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//@ edition: 2024
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//@ only-apple
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#![feature(darwin_objc)]
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use std::os::darwin::objc;
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pub const CLASS: objc::Class = objc::class!("NSObject");
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//~^ ERROR cannot access extern static `CLASS::VAL` [E0080]
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pub const SELECTOR: objc::SEL = objc::selector!("alloc");
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//~^ ERROR cannot access extern static `SELECTOR::VAL` [E0080]
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pub fn main() {}

‎tests/ui/darwin-objc/darwin-objc-bad-const.stderr‎

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error[E0080]: cannot access extern static `CLASS::VAL`
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--> $DIR/darwin-objc-bad-const.rs:11:32
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|
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LL | pub const CLASS: objc::Class = objc::class!("NSObject");
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| ^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `CLASS` failed here
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|
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= note: this error originates in the macro `objc::class` (in Nightly builds, run with -Z macro-backtrace for more info)
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error[E0080]: cannot access extern static `SELECTOR::VAL`
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--> $DIR/darwin-objc-bad-const.rs:14:33
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|
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LL | pub const SELECTOR: objc::SEL = objc::selector!("alloc");
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| ^^^^^^^^^^^^^^^^^^^^^^^^ evaluation of `SELECTOR` failed here
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|
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= note: this error originates in the macro `objc::selector` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0080`.

‎tests/ui/darwin-objc/darwin-objc-bad-ref.rs‎

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// Test that `objc::class!` and `objc::selector!` can't be returned by reference.
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// A single instance may have multiple addresses (e.g. across dylib boundaries).
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//@ edition: 2024
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//@ only-apple
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#![feature(darwin_objc)]
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use std::os::darwin::objc;
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pub fn class_ref<'a>() -> &'a objc::Class {
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&objc::class!("NSObject")
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//~^ ERROR cannot return reference to temporary value [E0515]
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}
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pub fn class_ref_static() -> &'static objc::Class {
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&objc::class!("NSObject")
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//~^ ERROR cannot return reference to temporary value [E0515]
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}
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pub fn selector_ref<'a>() -> &'a objc::SEL {
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&objc::selector!("alloc")
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//~^ ERROR cannot return reference to temporary value [E0515]
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}
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pub fn selector_ref_static() -> &'static objc::SEL {
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&objc::selector!("alloc")
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//~^ ERROR cannot return reference to temporary value [E0515]
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}
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pub fn main() {}

‎tests/ui/darwin-objc/darwin-objc-bad-ref.stderr‎

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error[E0515]: cannot return reference to temporary value
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--> $DIR/darwin-objc-bad-ref.rs:12:5
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|
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LL | &objc::class!("NSObject")
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| ^------------------------
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| ||
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| |temporary value created here
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| returns a reference to data owned by the current function
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error[E0515]: cannot return reference to temporary value
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--> $DIR/darwin-objc-bad-ref.rs:17:5
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|
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LL | &objc::class!("NSObject")
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| ^------------------------
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| ||
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| |temporary value created here
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| returns a reference to data owned by the current function
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error[E0515]: cannot return reference to temporary value
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--> $DIR/darwin-objc-bad-ref.rs:22:5
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|
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LL | &objc::selector!("alloc")
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| ^------------------------
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| ||
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| |temporary value created here
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| returns a reference to data owned by the current function
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error[E0515]: cannot return reference to temporary value
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--> $DIR/darwin-objc-bad-ref.rs:27:5
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|
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LL | &objc::selector!("alloc")
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| ^------------------------
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| ||
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| |temporary value created here
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| returns a reference to data owned by the current function
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0515`.

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