const-cstr

从 Rust 字符串字面量创建静态与 C 兼容的字符串。

用法

Cargo.toml

[dependencies]
const-cstr = "0.1"

crate 根目录

#[macro_use] extern crate const_cstr;

示例

 #[macro_use] extern crate const_cstr;

 use std::os::raw::c_char;
 use std::ffi::CStr;

 const_cstr! {
     HELLO_CSTR = "Hello, world!";

     // Multiple declarations can be made with one invocation.
     // GOODNIGHT_CSTR = "Goodnight, sun!";

     // But only with the same visibility:
     // pub GOODNIGHT_CSTR = "Goodnight, sun!";
     // ^~~ Error: expected identifier, found `pub` 
 }

 // Imagine this is an `extern "C"` function linked from some other lib.
 unsafe fn print_c_string(cstr: *const c_char) {
     println!("{}", CStr::from_ptr(cstr).to_str().unwrap());
 }

 fn main() {
     // When just passed a literal, returns an rvalue instead.
     let goodnight_cstr = const_cstr!("Goodnight, sun!");

     unsafe {
         print_c_string(HELLO_CSTR.as_ptr());
         print_c_string(goodnight_cstr.as_ptr());
     }
 }

打印

Hello, world!
Goodnight, sun!

许可证

根据您的选择，许可协议为

• Apache 许可协议版本 2.0 (LICENSE-APACHE 或 https://apache.ac.cn/licenses/LICENSE-2.0)
• MIT 许可协议 (LICENSE-MIT 或 http://opensource.org/licenses/MIT)

贡献

除非您明确表示，否则您提交的任何有意包含在作品中的贡献将根据上述条款双重许可，不附加任何额外条款或条件。