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// Copyright 2012-2017 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. // The compiler code necessary to support the compile_error! extension. use syntax::ext::base::*; use syntax::ext::base; use syntax_pos::Span; use syntax::tokenstream; pub fn expand_compile_error<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[tokenstream::TokenTree]) -> Box<base::MacResult + 'cx> { let var = match get_single_str_from_tts(cx, sp, tts, "compile_error!") { None => return DummyResult::expr(sp), Some(v) => v, }; cx.span_err(sp, &var); DummyResult::any(sp) }