1 unstable release
0.1.0 | Sep 23, 2021 |
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#77 in #alias
185 downloads per month
Used in 2 crates
(via gmod)
6KB
73 lines
✨ fn_type_alias
A proc attribute macro that generates a type alias with the given identifier for the attributed function.
Example
#[macro_use]
extern crate fn_type_alias;
#[type_alias(HelloWorldFn)] // The type alias will inherit its visibility from the function
pub(super) fn hello_world() {
println!("hello world!");
}
#[type_alias(pub(crate), HelloWorldFn)] // The type alias will be pub(crate), but the function will be pub
pub fn hello_world() {
println!("hello world!");
}
Use Case
This macro is well suited for conditional compilation. For example, using the fn_abi
macro:
#[macro_use]
extern crate fn_type_alias;
#[macro_use]
extern crate fn_abi;
#[abi(
linux32 = "C",
linux64 = "C",
win32 = "thiscall",
win64 = "stdcall"
)]
#[type_alias(HelloWorldFn)]
pub extern fn hello_world() {
println!("hello world!");
}
// Expands to when building for Windows 64-bit:
pub type HelloWorldFn = extern "stdcall" fn();
pub extern "stdcall" fn hello_world() {
println!("hello world!");
}
Dependencies
~1.5MB
~35K SLoC