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librustc: adjust logic for cfg attribute and add not predicate.

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This commit is contained in:
Luqman Aden 2013-03-15 20:33:41 -07:00
parent a14ec73cd2
commit 429fed0c8b
1 changed files with 11 additions and 10 deletions
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21
src/librustc/front/config.rs
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@ -185,18 +185,19 @@ pub fn metas_in_cfg(cfg: ast::crate_cfg,
// Pull the inner meta_items from the #[cfg(meta_item, ...)] attributes,
// so we can match against them. This is the list of configurations for
// which the item is valid
let cfg_metas =
vec::concat(
vec::filter_map(cfg_metas, |i| attr::get_meta_item_list(i)));
let cfg_metas = vec::filter_map(cfg_metas, |i| attr::get_meta_item_list(i));
let has_cfg_metas = vec::len(cfg_metas) > 0u;
if !has_cfg_metas { return true; }
if cfg_metas.all(|c| c.is_empty()) { return true; }
for cfg_metas.each |cfg_mi| {
if attr::contains(cfg, *cfg_mi) { return true; }
}
return false;
cfg_metas.any(|cfg_meta| {
cfg_meta.all(|cfg_mi| {
match cfg_mi.node {
ast::meta_list(s, ref it) if *s == ~"not"
=> it.all(|mi| !attr::contains(cfg, *mi)),
_ => attr::contains(cfg, *cfg_mi)
}
})
})
}