28 lines
973 B
Rust
28 lines
973 B
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]
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pub fn check(input: TokenStream) -> TokenStream {
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// Parsed `x2` can refer to `x2` from `input`
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let parsed1: TokenStream = "let x3 = x2;".parse().unwrap();
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// `x3` parsed from one string can refer to `x3` parsed from another string.
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let parsed2: TokenStream = "let x4 = x3;".parse().unwrap();
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// Manually assembled `x4` can refer to parsed `x4`.
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let manual: Vec<TokenTree> = vec![
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Ident::new("let", Span::call_site()).into(),
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Ident::new("x5", Span::call_site()).into(),
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Punct::new('=', Spacing::Alone).into(),
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Ident::new("x4", Span::call_site()).into(),
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Punct::new(';', Spacing::Alone).into(),
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];
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input.into_iter().chain(parsed1.into_iter())
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.chain(parsed2.into_iter())
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.chain(manual.into_iter())
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.collect()
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}
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