144 lines
4.7 KiB
Rust
144 lines
4.7 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Verifies all possible restrictions for statics values.
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#![feature(box_syntax)]
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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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// This one should fail
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static STATIC3: SafeEnum = SafeEnum::Variant3(WithDtor);
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//~^ ERROR statics are not allowed to have destructors
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// This enum will be used to test that variants
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// are considered unsafe if their enum type implements
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// a destructor.
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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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//~^ ERROR statics are not allowed to have destructors
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static STATIC5: UnsafeEnum = UnsafeEnum::Variant6(0);
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//~^ ERROR statics are not allowed to have destructors
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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 = SafeStruct{field1: SafeEnum::Variant1, field2: SafeEnum::Variant2(0)};
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// field2 has an unsafe value, hence this should fail
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static STATIC7: SafeStruct = SafeStruct{field1: SafeEnum::Variant1,
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field2: SafeEnum::Variant3(WithDtor)};
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//~^ ERROR statics are not allowed to have destructors
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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{field1: SafeEnum::Variant1,
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..SafeStruct{field1: SafeEnum::Variant1,
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field2: SafeEnum::Variant1}};
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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{field1: SafeEnum::Variant1,
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..SafeStruct{field1: SafeEnum::Variant3(WithDtor),
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field2: SafeEnum::Variant1}};
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//~^^ ERROR statics are not allowed to have destructors
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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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// Types with destructors are not allowed for statics
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static STATIC10: UnsafeStruct = UnsafeStruct;
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//~^ ERROR statics are not allowed to have destructor
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struct MyOwned;
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static STATIC11: Box<MyOwned> = box MyOwned;
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//~^ ERROR allocations are not allowed in statics
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// The following examples test that mutable structs are just forbidden
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// to have types with destructors
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// These should fail
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static mut STATIC12: UnsafeStruct = UnsafeStruct;
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//~^ ERROR mutable statics are not allowed to have destructors
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//~^^ ERROR statics are not allowed to have destructors
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static mut STATIC13: SafeStruct = SafeStruct{field1: SafeEnum::Variant1,
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//~^ ERROR mutable statics are not allowed to have destructors
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field2: SafeEnum::Variant3(WithDtor)};
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//~^ ERROR: statics are not allowed to have destructors
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static mut STATIC14: SafeStruct = SafeStruct {
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//~^ ERROR mutable statics are not allowed to have destructors
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field1: SafeEnum::Variant1,
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field2: SafeEnum::Variant4("str".to_string())
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//~^ ERROR static contains unimplemented expression type
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};
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static STATIC15: &'static [Box<MyOwned>] = &[
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box MyOwned, //~ ERROR allocations are not allowed in statics
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box MyOwned, //~ ERROR allocations are not allowed in statics
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];
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static STATIC16: (&'static Box<MyOwned>, &'static Box<MyOwned>) = (
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&box MyOwned, //~ ERROR allocations are not allowed in statics
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&box MyOwned, //~ ERROR allocations are not allowed in statics
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);
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static mut STATIC17: SafeEnum = SafeEnum::Variant1;
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//~^ ERROR mutable statics are not allowed to have destructors
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static STATIC19: Box<isize> =
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box 3;
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//~^ ERROR allocations are not allowed in statics
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pub fn main() {
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let y = { static x: Box<isize> = box 3; x };
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//~^ ERROR allocations are not allowed in statics
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}
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