506762f3ff
Currently all core and std macros are automatically added to the prelude via #[macro_use]. However a situation arose where we want to add a new macro `assert_matches` but don't want to pull it into the standard prelude for compatibility reasons. By explicitly exporting the macros found in the core and std crates we get to decide on a per macro basis and can later add them via the rust_20xx preludes.
72 lines
3.2 KiB
Text
72 lines
3.2 KiB
Text
#![feature(prelude_import)]
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#![no_std]
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//@ check-pass
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//@ force-host
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//@ no-prefer-dynamic
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//@ compile-flags: -Z unpretty=expanded
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//@ needs-unwind compiling proc macros with panic=abort causes a warning
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//@ edition: 2015
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//
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// This file is not actually used as a proc-macro - instead,
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// it's just used to show the output of the `quote!` macro
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#![feature(proc_macro_quote)]
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#![crate_type = "proc-macro"]
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extern crate std;
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#[prelude_import]
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use ::std::prelude::rust_2015::*;
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extern crate proc_macro;
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fn main() {
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{
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let mut ts = crate::TokenStream::new();
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crate::ToTokens::to_tokens(&crate::TokenTree::Ident(crate::Ident::new("let",
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crate::Span::recover_proc_macro_span(0))), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Ident(crate::Ident::new("hello",
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crate::Span::recover_proc_macro_span(1))), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Punct(crate::Punct::new('=',
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crate::Spacing::Alone)), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Literal({
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let mut iter =
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"\"world\"".parse::<crate::TokenStream>().unwrap().into_iter();
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if let (Some(crate::TokenTree::Literal(mut lit)), None) =
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(iter.next(), iter.next()) {
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lit.set_span(crate::Span::recover_proc_macro_span(2));
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lit
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} else {
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::core::panicking::panic("internal error: entered unreachable code")
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}
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}), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Punct(crate::Punct::new(';',
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crate::Spacing::Alone)), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Ident(crate::Ident::new("let",
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crate::Span::recover_proc_macro_span(3))), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Ident(crate::Ident::new_raw("raw_ident",
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crate::Span::recover_proc_macro_span(4))), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Punct(crate::Punct::new('=',
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crate::Spacing::Alone)), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Literal({
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let mut iter =
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"r#\"raw\"literal\"#".parse::<crate::TokenStream>().unwrap().into_iter();
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if let (Some(crate::TokenTree::Literal(mut lit)), None) =
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(iter.next(), iter.next()) {
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lit.set_span(crate::Span::recover_proc_macro_span(5));
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lit
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} else {
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::core::panicking::panic("internal error: entered unreachable code")
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}
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}), &mut ts);
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crate::ToTokens::to_tokens(&crate::TokenTree::Punct(crate::Punct::new(';',
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crate::Spacing::Alone)), &mut ts);
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ts
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}
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}
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const _: () =
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{
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extern crate proc_macro;
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#[rustc_proc_macro_decls]
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#[used]
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#[allow(deprecated)]
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static _DECLS: &[proc_macro::bridge::client::ProcMacro] = &[];
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};
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