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