31 lines
1.0 KiB
Rust
31 lines
1.0 KiB
Rust
// Copyright 2012-2017 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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// The compiler code necessary to support the compile_error! extension.
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use syntax::ext::base::*;
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use syntax::ext::base;
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use syntax_pos::Span;
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use syntax::tokenstream;
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pub fn expand_compile_error<'cx>(cx: &'cx mut ExtCtxt,
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sp: Span,
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tts: &[tokenstream::TokenTree])
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-> Box<base::MacResult + 'cx> {
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let var = match get_single_str_from_tts(cx, sp, tts, "compile_error!") {
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None => return DummyResult::expr(sp),
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Some(v) => v,
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};
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cx.span_err(sp, &var);
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DummyResult::any(sp)
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}
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