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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Verifies all possible restrictions for statics values.
#![allow(warnings)]
#![feature(box_syntax)]
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{field1: SafeEnum::Variant3(WithDtor),
//~^ ERROR destructors cannot be evaluated at compile-time
field2: SafeEnum::Variant1}};
struct UnsafeStruct;
impl Drop for UnsafeStruct {
fn drop(&mut self) {}
}
static STATIC10: UnsafeStruct = UnsafeStruct;
struct MyOwned;
static STATIC11: Box<MyOwned> = box MyOwned;
//~^ ERROR allocations are not allowed in statics
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 calls in statics are limited to constant functions
};
static STATIC15: &'static [Box<MyOwned>] = &[
box MyOwned, //~ ERROR allocations are not allowed in statics
box MyOwned, //~ ERROR allocations are not allowed in statics
];
static STATIC16: (&'static Box<MyOwned>, &'static Box<MyOwned>) = (
&box MyOwned, //~ ERROR allocations are not allowed in statics
&box MyOwned, //~ ERROR allocations are not allowed in statics
);
static mut STATIC17: SafeEnum = SafeEnum::Variant1;
static STATIC19: Box<isize> =
box 3;
//~^ ERROR allocations are not allowed in statics
pub fn main() {
let y = { static x: Box<isize> = box 3; x };
//~^ ERROR allocations are not allowed in statics
//~^^ ERROR cannot move out of static item
}
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