82a15a6a0a
syntax-[breaking-change] cc #31645 (Only breaking because ast::TokenTree is now tokenstream::TokenTree.) This pull request refactors TokenTrees into their own file as src/libsyntax/tokenstream.rs, moving them out of src/libsyntax/ast.rs, in order to prepare for an accompanying TokenStream implementation (per RFC 1566).
35 lines
1.3 KiB
Rust
35 lines
1.3 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use syntax::ext::base;
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use syntax::feature_gate;
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use syntax::print;
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use syntax::tokenstream;
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use syntax_pos;
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pub fn expand_syntax_ext<'cx>(cx: &'cx mut base::ExtCtxt,
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sp: syntax_pos::Span,
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tts: &[tokenstream::TokenTree])
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-> Box<base::MacResult+'cx> {
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if !cx.ecfg.enable_log_syntax() {
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feature_gate::emit_feature_err(&cx.parse_sess.span_diagnostic,
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"log_syntax",
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sp,
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feature_gate::GateIssue::Language,
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feature_gate::EXPLAIN_LOG_SYNTAX);
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return base::DummyResult::any(sp);
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}
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println!("{}", print::pprust::tts_to_string(tts));
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// any so that `log_syntax` can be invoked as an expression and item.
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base::DummyResult::any(sp)
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}
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