mirror of https://github.com/rust-lang/rust
123 lines
3.4 KiB
Rust
123 lines
3.4 KiB
Rust
// Verifies all possible restrictions for statics values.
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#![allow(warnings)]
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use std::marker;
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struct WithDtor;
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impl Drop for WithDtor {
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fn drop(&mut self) {}
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}
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// This enum will be used to test the following rules:
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// 1. Variants are safe for static
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// 2. Expr calls are allowed as long as they arguments are safe
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// 3. Expr calls with unsafe arguments for statics are rejected
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enum SafeEnum {
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Variant1,
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Variant2(isize),
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Variant3(WithDtor),
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Variant4(String),
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}
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// These should be ok
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static STATIC1: SafeEnum = SafeEnum::Variant1;
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static STATIC2: SafeEnum = SafeEnum::Variant2(0);
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static STATIC3: SafeEnum = SafeEnum::Variant3(WithDtor);
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enum UnsafeEnum {
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Variant5,
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Variant6(isize),
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}
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impl Drop for UnsafeEnum {
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fn drop(&mut self) {}
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}
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static STATIC4: UnsafeEnum = UnsafeEnum::Variant5;
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static STATIC5: UnsafeEnum = UnsafeEnum::Variant6(0);
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struct SafeStruct {
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field1: SafeEnum,
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field2: SafeEnum,
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}
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// Struct fields are safe, hence this static should be safe
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static STATIC6: SafeStruct =
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SafeStruct { field1: SafeEnum::Variant1, field2: SafeEnum::Variant2(0) };
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static STATIC7: SafeStruct =
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SafeStruct { field1: SafeEnum::Variant1, field2: SafeEnum::Variant3(WithDtor) };
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// Test variadic constructor for structs. The base struct should be examined
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// as well as every field present in the constructor.
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// This example shouldn't fail because all the fields are safe.
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static STATIC8: SafeStruct = SafeStruct {
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field1: SafeEnum::Variant1,
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..SafeStruct { field1: SafeEnum::Variant1, field2: SafeEnum::Variant1 }
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};
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// This example should fail because field1 in the base struct is not safe
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static STATIC9: SafeStruct = SafeStruct {
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field1: SafeEnum::Variant1,
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..SafeStruct {
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//~^ ERROR destructor of
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field1: SafeEnum::Variant3(WithDtor),
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field2: SafeEnum::Variant1,
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}
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};
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struct UnsafeStruct;
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impl Drop for UnsafeStruct {
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fn drop(&mut self) {}
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}
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static STATIC10: UnsafeStruct = UnsafeStruct;
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struct MyOwned;
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static STATIC11: Vec<MyOwned> = vec![MyOwned];
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//~^ ERROR allocations are not allowed in statics
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//~^^ ERROR cannot call non-const
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static mut STATIC12: UnsafeStruct = UnsafeStruct;
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static mut STATIC13: SafeStruct =
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SafeStruct { field1: SafeEnum::Variant1, field2: SafeEnum::Variant3(WithDtor) };
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static mut STATIC14: SafeStruct = SafeStruct {
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field1: SafeEnum::Variant1,
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field2: SafeEnum::Variant4("str".to_string()), //~ ERROR cannot call non-const fn
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};
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static STATIC15: &'static [Vec<MyOwned>] = &[
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vec![MyOwned], //~ ERROR allocations are not allowed in statics
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//~^ ERROR cannot call non-const
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vec![MyOwned], //~ ERROR allocations are not allowed in statics
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//~^ ERROR cannot call non-const
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];
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static STATIC16: (&'static Vec<MyOwned>, &'static Vec<MyOwned>) = (
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&vec![MyOwned], //~ ERROR allocations are not allowed in statics
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//~^ ERROR cannot call non-const
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&vec![MyOwned], //~ ERROR allocations are not allowed in statics
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//~^ ERROR cannot call non-const
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);
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static mut STATIC17: SafeEnum = SafeEnum::Variant1;
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static STATIC19: Vec<isize> = vec![3];
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//~^ ERROR allocations are not allowed in statics
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//~^^ ERROR cannot call non-const
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pub fn main() {
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let y = {
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static x: Vec<isize> = vec![3]; //~ ERROR allocations are not allowed in statics
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//~^ ERROR cannot call non-const
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x
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//~^ ERROR cannot move out of static
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};
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}
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