80 lines
4.4 KiB
Rust
80 lines
4.4 KiB
Rust
// Copyright 2026 The Fuchsia Authors
|
|
//
|
|
// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0
|
|
// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT
|
|
// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option.
|
|
// This file may not be copied, modified, or distributed except according to
|
|
// those terms.
|
|
|
|
// These tests cause errors which are generated by a later compilation pass than
|
|
// the other errors we generate, and so if they're compiled in the same file,
|
|
// the compiler will never get to that pass, and so we won't get the errors.
|
|
|
|
include!("../include.rs");
|
|
|
|
use util::AU16;
|
|
use zerocopy::{transmute, transmute_mut, try_transmute};
|
|
|
|
// Although this is not a soundness requirement, we currently require that the
|
|
// size of the destination type is not smaller than the size of the source type.
|
|
const TRANSMUTE_DECREASE_SIZE: u8 = transmute!(AU16(0));
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
//~[stable, nightly]^^ ERROR: transmuting from 2-byte type to 1-byte type: `AU16` -> `u8`
|
|
|
|
// `transmute!` does not support transmuting from a smaller type to a larger
|
|
// one.
|
|
const TRANSMUTE_INCREASE_SIZE: AU16 = transmute!(0u8);
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
//~[stable, nightly]^^ ERROR: transmuting from 1-byte type to 2-byte type: `u8` -> `AU16`
|
|
|
|
// `transmute!` does not support transmuting from a smaller type to a larger
|
|
// one.
|
|
const TRANSMUTE_INCREASE_SIZE_ALLOW_SHRINK: AU16 = transmute!(#![allow(shrink)] 0u8);
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
//~[stable, nightly]^^ ERROR: transmuting from 1-byte type to 2-byte type: `u8` -> `Transmute<u8, AU16>`
|
|
|
|
const ARRAY_OF_U8S: [u8; 2] = [0u8; 2];
|
|
|
|
// `transmute_mut!` cannot, generally speaking, be used in const contexts.
|
|
const TRANSMUTE_MUT_CONST_CONTEXT: &mut [u8; 2] = transmute_mut!(&mut ARRAY_OF_U8S);
|
|
//~[msrv]^ ERROR: mutable references are not allowed in constants
|
|
//~[msrv]^^ ERROR: calls in constants are limited to constant functions, tuple structs and tuple variants
|
|
//~[msrv]^^^ ERROR: calls in constants are limited to constant functions, tuple structs and tuple variants
|
|
//~[msrv]^^^^ ERROR: temporary value dropped while borrowed
|
|
//~[stable]^^^^^ ERROR: cannot call non-const method `Wrap::<&mut [u8; 2], &mut [u8; 2]>::transmute_mut_inference_helper` in constants
|
|
//~[stable]^^^^^^ ERROR: cannot call non-const method `Wrap::<&mut [u8; 2], &mut [u8; 2]>::transmute_mut` in constants
|
|
//~[nightly]^^^^^^^ ERROR: cannot call non-const method `zerocopy::util::macro_util::Wrap::<&mut [u8; 2], &mut [u8; 2]>::transmute_mut_inference_helper` in constants
|
|
//~[nightly]^^^^^^^^ ERROR: cannot call non-const method `zerocopy::util::macro_util::Wrap::<&mut [u8; 2], &mut [u8; 2]>::transmute_mut` in constants
|
|
|
|
// Should fail because the file is 4 bytes long, not 8.
|
|
const INCLUDE_VALUE_WRONG_SIZE: u64 = zerocopy::include_value!("../../testdata/include_value/data");
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
//~[stable, nightly]^^ ERROR: transmuting from 4-byte type to 8-byte type: `[u8; 4]` -> `u64`
|
|
|
|
fn main() {
|
|
// Although this is not a soundness requirement, we currently require that
|
|
// the size of the destination type is not smaller than the size of the
|
|
// source type.
|
|
let _decrease_size: Result<u8, _> = try_transmute!(AU16(0));
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
|
|
// `try_transmute!` does not support transmuting from a smaller type to a larger
|
|
// one.
|
|
let _increase_size: Result<AU16, _> = try_transmute!(0u8);
|
|
//~[msrv, stable, nightly]^ ERROR: cannot transmute between types of different sizes, or dependently-sized types
|
|
|
|
fn _transmute_mut_increase_lifetime() {
|
|
let mut x = 0u64;
|
|
// It is illegal to increase the lifetime scope.
|
|
let _: &'static mut u64 = zerocopy::transmute_mut!(&mut x);
|
|
//~[msrv, stable, nightly]^ ERROR: `x` does not live long enough
|
|
}
|
|
|
|
fn _transmute_ref_increase_lifetime() {
|
|
let x = 0u64;
|
|
// It is illegal to increase the lifetime scope.
|
|
let _: &'static u64 = zerocopy::transmute_ref!(&x);
|
|
//~[msrv, stable, nightly]^ ERROR: `x` does not live long enough
|
|
}
|
|
}
|