mirror of https://github.com/rust-lang/rust
48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
//@ force-host
|
|
//@ no-prefer-dynamic
|
|
|
|
#![crate_type = "proc-macro"]
|
|
|
|
extern crate proc_macro;
|
|
|
|
use proc_macro::*;
|
|
|
|
#[proc_macro_attribute]
|
|
pub fn assert1(_a: TokenStream, b: TokenStream) -> TokenStream {
|
|
assert_eq(b.clone(), "pub fn foo() {}".parse().unwrap());
|
|
b
|
|
}
|
|
|
|
#[proc_macro_derive(Foo, attributes(foo))]
|
|
pub fn assert2(a: TokenStream) -> TokenStream {
|
|
assert_eq(a, "pub struct MyStructc { _a: i32, }".parse().unwrap());
|
|
TokenStream::new()
|
|
}
|
|
|
|
fn assert_eq(a: TokenStream, b: TokenStream) {
|
|
let mut a = a.into_iter();
|
|
let mut b = b.into_iter();
|
|
for (a, b) in a.by_ref().zip(&mut b) {
|
|
match (a, b) {
|
|
(TokenTree::Group(a), TokenTree::Group(b)) => {
|
|
assert_eq!(a.delimiter(), b.delimiter());
|
|
assert_eq(a.stream(), b.stream());
|
|
}
|
|
(TokenTree::Punct(a), TokenTree::Punct(b)) => {
|
|
assert_eq!(a.as_char(), b.as_char());
|
|
assert_eq!(a.spacing(), b.spacing());
|
|
}
|
|
(TokenTree::Literal(a), TokenTree::Literal(b)) => {
|
|
assert_eq!(a.to_string(), b.to_string());
|
|
}
|
|
(TokenTree::Ident(a), TokenTree::Ident(b)) => {
|
|
assert_eq!(a.to_string(), b.to_string());
|
|
}
|
|
(a, b) => panic!("{:?} != {:?}", a, b),
|
|
}
|
|
}
|
|
|
|
assert!(a.next().is_none());
|
|
assert!(b.next().is_none());
|
|
}
|