9519abecfb
This removes the ability to use `foo(bar)` style cfgs. Switch them to `foo_bar` or `foo="bar"` instead. [breaking-change]
35 lines
1.1 KiB
Rust
35 lines
1.1 KiB
Rust
// Copyright 2014 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 ast;
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use attr;
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use codemap::Span;
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use ext::base::ExtCtxt;
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use ext::build::AstBuilder;
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use ptr::P;
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pub fn expand(cx: &mut ExtCtxt, sp: Span, mi: &ast::MetaItem, it: P<ast::Item>) -> P<ast::Item> {
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let (cfg, attr) = match mi.node {
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ast::MetaList(_, ref mis) if mis.len() == 2 => (&mis[0], &mis[1]),
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_ => {
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cx.span_err(sp, "expected `#[cfg_attr(<cfg pattern>, <attr>)]`");
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return it;
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}
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};
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let mut out = (*it).clone();
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if attr::cfg_matches(&cx.parse_sess.span_diagnostic, cx.cfg.as_slice(), &**cfg) {
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out.attrs.push(cx.attribute(attr.span, attr.clone()));
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}
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P(out)
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}
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