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Add test for extern without explicit ABI
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‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.current.fixed

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// The purpose of this feature gate is to make something into a hard error in a
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// future edition. Consequently, this test differs from most other feature gate
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// tests. Instead of verifying that an error occurs when the feature gate is
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// missing, it ensures that the hard error is only produced with the feature
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// gate is present in the `future` edition -- and otherwise that only a warning
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// is emitted.
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//@ revisions: current current_feature future future_feature
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//@ [current] run-rustfix
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//@ [current] check-pass
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//@ [current_feature] run-rustfix
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//@ [current_feature] check-pass
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//@ [future] edition: future
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//@ [future] compile-flags: -Z unstable-options
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//@ [future] run-rustfix
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//@ [future] check-pass
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//@ [future_feature] edition: future
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//@ [future_feature] compile-flags: -Z unstable-options
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#![cfg_attr(future_feature, feature(explicit_extern_abis))]
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#![cfg_attr(current_feature, feature(explicit_extern_abis))]
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extern "C" fn _foo() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" fn _bar() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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fn main() {}

‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.current.stderr

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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:27:1
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|
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LL | extern fn _foo() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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|
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= note: `#[warn(missing_abi)]` on by default
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:33:8
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|
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LL | unsafe extern fn _bar() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:39:8
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|
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LL | unsafe extern {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: 3 warnings emitted
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‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.current_feature.fixed

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// The purpose of this feature gate is to make something into a hard error in a
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// future edition. Consequently, this test differs from most other feature gate
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// tests. Instead of verifying that an error occurs when the feature gate is
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// missing, it ensures that the hard error is only produced with the feature
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// gate is present in the `future` edition -- and otherwise that only a warning
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// is emitted.
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//@ revisions: current current_feature future future_feature
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//@ [current] run-rustfix
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//@ [current] check-pass
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//@ [current_feature] run-rustfix
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//@ [current_feature] check-pass
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//@ [future] edition: future
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//@ [future] compile-flags: -Z unstable-options
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//@ [future] run-rustfix
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//@ [future] check-pass
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//@ [future_feature] edition: future
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//@ [future_feature] compile-flags: -Z unstable-options
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#![cfg_attr(future_feature, feature(explicit_extern_abis))]
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#![cfg_attr(current_feature, feature(explicit_extern_abis))]
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extern "C" fn _foo() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" fn _bar() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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fn main() {}

‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.current_feature.stderr

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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:27:1
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|
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LL | extern fn _foo() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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|
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= note: `#[warn(missing_abi)]` on by default
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:33:8
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|
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LL | unsafe extern fn _bar() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:39:8
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|
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LL | unsafe extern {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: 3 warnings emitted
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‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.future.fixed

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// The purpose of this feature gate is to make something into a hard error in a
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// future edition. Consequently, this test differs from most other feature gate
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// tests. Instead of verifying that an error occurs when the feature gate is
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// missing, it ensures that the hard error is only produced with the feature
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// gate is present in the `future` edition -- and otherwise that only a warning
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// is emitted.
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//@ revisions: current current_feature future future_feature
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//@ [current] run-rustfix
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//@ [current] check-pass
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//@ [current_feature] run-rustfix
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//@ [current_feature] check-pass
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//@ [future] edition: future
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//@ [future] compile-flags: -Z unstable-options
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//@ [future] run-rustfix
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//@ [future] check-pass
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//@ [future_feature] edition: future
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//@ [future_feature] compile-flags: -Z unstable-options
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#![cfg_attr(future_feature, feature(explicit_extern_abis))]
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#![cfg_attr(current_feature, feature(explicit_extern_abis))]
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extern "C" fn _foo() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" fn _bar() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern "C" {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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fn main() {}

‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.future.stderr

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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:27:1
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|
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LL | extern fn _foo() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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|
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= note: `#[warn(missing_abi)]` on by default
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:33:8
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|
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LL | unsafe extern fn _bar() {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/feature-gate-explicit-extern-abis.rs:39:8
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|
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LL | unsafe extern {}
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| ^^^^^^ help: explicitly specify the "C" ABI: `extern "C"`
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warning: 3 warnings emitted
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‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.future_feature.stderr

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error: `extern` declarations without an explicit ABI are disallowed
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--> $DIR/feature-gate-explicit-extern-abis.rs:27:1
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|
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LL | extern fn _foo() {}
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| ^^^^^^ help: specify an ABI: `extern <abi>`
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|
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= help: prior to Rust 2024, a default ABI was inferred
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error: `extern` declarations without an explicit ABI are disallowed
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--> $DIR/feature-gate-explicit-extern-abis.rs:33:8
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|
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LL | unsafe extern fn _bar() {}
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| ^^^^^^ help: specify an ABI: `extern <abi>`
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|
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= help: prior to Rust 2024, a default ABI was inferred
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error: `extern` declarations without an explicit ABI are disallowed
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--> $DIR/feature-gate-explicit-extern-abis.rs:39:8
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|
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LL | unsafe extern {}
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| ^^^^^^ help: specify an ABI: `extern <abi>`
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|
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= help: prior to Rust 2024, a default ABI was inferred
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error: aborting due to 3 previous errors
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‎tests/ui/feature-gates/feature-gate-explicit-extern-abis.rs

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// The purpose of this feature gate is to make something into a hard error in a
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// future edition. Consequently, this test differs from most other feature gate
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// tests. Instead of verifying that an error occurs when the feature gate is
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// missing, it ensures that the hard error is only produced with the feature
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// gate is present in the `future` edition -- and otherwise that only a warning
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// is emitted.
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//@ revisions: current current_feature future future_feature
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//@ [current] run-rustfix
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//@ [current] check-pass
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//@ [current_feature] run-rustfix
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//@ [current_feature] check-pass
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//@ [future] edition: future
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//@ [future] compile-flags: -Z unstable-options
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//@ [future] run-rustfix
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//@ [future] check-pass
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//@ [future_feature] edition: future
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//@ [future_feature] compile-flags: -Z unstable-options
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#![cfg_attr(future_feature, feature(explicit_extern_abis))]
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#![cfg_attr(current_feature, feature(explicit_extern_abis))]
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extern fn _foo() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern fn _bar() {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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unsafe extern {}
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//[current]~^ WARN `extern` declarations without an explicit ABI are deprecated
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//[current_feature]~^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future]~^^^ WARN `extern` declarations without an explicit ABI are deprecated
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//[future_feature]~^^^^ ERROR `extern` declarations without an explicit ABI are disallowed
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fn main() {}

‎tests/ui/link-native-libs/suggest-libname-only-1.rs

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//@ compile-flags: --crate-type rlib
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#[link(name = "libfoo.a", kind = "static")]
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extern { } //~ WARN extern declarations without an explicit ABI are deprecated
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extern { } //~ WARN `extern` declarations without an explicit ABI are deprecated
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//~| HELP explicitly specify the "C" ABI
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pub fn main() { }

‎tests/ui/link-native-libs/suggest-libname-only-1.stderr

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warning: extern declarations without an explicit ABI are deprecated
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warning: `extern` declarations without an explicit ABI are deprecated
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--> $DIR/suggest-libname-only-1.rs:5:1
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|
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LL | extern { }

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