ec7a50d20d
This commit is an implementation of [RFC 494][rfc] which removes the entire `std::c_vec` module and redesigns the `std::c_str` module as `std::ffi`. [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0494-c_str-and-c_vec-stability.md The interface of the new `CString` is outlined in the linked RFC, the primary changes being: * The `ToCStr` trait is gone, meaning the `with_c_str` and `to_c_str` methods are now gone. These two methods are replaced with a `CString::from_slice` method. * The `CString` type is now just a wrapper around `Vec<u8>` with a static guarantee that there is a trailing nul byte with no internal nul bytes. This means that `CString` now implements `Deref<Target = [c_char]>`, which is where it gains most of its methods from. A few helper methods are added to acquire a slice of `u8` instead of `c_char`, as well as including a slice with the trailing nul byte if necessary. * All usage of non-owned `CString` values is now done via two functions inside of `std::ffi`, called `c_str_to_bytes` and `c_str_to_bytes_with_nul`. These functions are now the one method used to convert a `*const c_char` to a Rust slice of `u8`. Many more details, including newly deprecated methods, can be found linked in the RFC. This is a: [breaking-change] Closes #20444
38 lines
975 B
Rust
38 lines
975 B
Rust
// Copyright 2013 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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use std::dynamic_lib::DynamicLibrary;
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#[no_mangle]
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pub fn foo() { bar(); }
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pub fn foo2<T>() {
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fn bar2() {
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bar();
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}
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bar2();
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}
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#[no_mangle]
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fn bar() { }
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#[no_mangle]
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fn baz() { }
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pub fn test() {
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let none: Option<&Path> = None; // appease the typechecker
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let lib = DynamicLibrary::open(none).unwrap();
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unsafe {
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assert!(lib.symbol::<int>("foo").is_ok());
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assert!(lib.symbol::<int>("baz").is_err());
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assert!(lib.symbol::<int>("bar").is_err());
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}
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}
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