48 lines
1.8 KiB
Rust
48 lines
1.8 KiB
Rust
|
// force-host
|
||
|
|
// no-prefer-dynamic
|
||
|
|
|
||
|
|
#![crate_type = "proc-macro"]
|
||
|
|
|
||
|
|
//#![feature(proc_macro_diagnostic, proc_macro_span, proc_macro_def_site)]
|
||
|
|
|
||
|
|
extern crate proc_macro;
|
||
|
|
|
||
|
|
use proc_macro::{Delimiter, Group, Ident, Punct, Spacing, Span, TokenStream, TokenTree};
|
||
|
|
use std::iter::FromIterator;
|
||
|
|
|
||
|
|
#[proc_macro_attribute]
|
||
|
|
pub fn repro(_args: TokenStream, input: TokenStream) -> TokenStream {
|
||
|
|
let call_site = Span::call_site();
|
||
|
|
let span = input.into_iter().nth(8).unwrap().span();
|
||
|
|
|
||
|
|
//fn f(_: &::std::fmt::Formatter) {}
|
||
|
|
TokenStream::from_iter([
|
||
|
|
TokenTree::Ident(Ident::new("fn", call_site)),
|
||
|
|
TokenTree::Ident(Ident::new("f", call_site)),
|
||
|
|
TokenTree::Group(Group::new(
|
||
|
|
Delimiter::Parenthesis,
|
||
|
|
TokenStream::from_iter([
|
||
|
|
TokenTree::Ident(Ident::new("_", call_site)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Alone, call_site)),
|
||
|
|
TokenTree::Punct(punct('&', Spacing::Alone, call_site)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Joint, span)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Alone, span)),
|
||
|
|
TokenTree::Ident(Ident::new("std", span)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Joint, span)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Alone, span)),
|
||
|
|
TokenTree::Ident(Ident::new("fmt", span)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Joint, span)),
|
||
|
|
TokenTree::Punct(punct(':', Spacing::Alone, span)),
|
||
|
|
TokenTree::Ident(Ident::new("Formatter", span)),
|
||
|
|
]),
|
||
|
|
)),
|
||
|
|
TokenTree::Group(Group::new(Delimiter::Brace, TokenStream::new())),
|
||
|
|
])
|
||
|
|
}
|
||
|
|
|
||
|
|
fn punct(ch: char, spacing: Spacing, span: Span) -> Punct {
|
||
|
|
let mut punct = Punct::new(ch, spacing);
|
||
|
|
punct.set_span(span);
|
||
|
|
punct
|
||
|
|
}
|