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