bjoernager/rust
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if $c:expr { Some($r:expr) } else { None } =>> $c.then(|| $r)

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Maybe Waffle 2023-02-15 11:43:41 +00:00
parent af3c8b2726
commit 8751fa1a9a
54 changed files with 159 additions and 281 deletions
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10
compiler/rustc_expand/src/config.rs
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@ -238,12 +238,10 @@ macro_rules! configure {
impl<'a> StripUnconfigured<'a> {
pub fn configure<T: HasAttrs + HasTokens>(&self, mut node: T) -> Option<T> {
self.process_cfg_attrs(&mut node);
if self.in_cfg(node.attrs()) {
self.in_cfg(node.attrs()).then(|| {
self.try_configure_tokens(&mut node);
Some(node)
} else {
None
}
node
})
}
fn try_configure_tokens<T: HasTokens>(&self, node: &mut T) {
@ -257,7 +255,7 @@ impl<'a> StripUnconfigured<'a> {
fn configure_krate_attrs(&self, mut attrs: ast::AttrVec) -> Option<ast::AttrVec> {
attrs.flat_map_in_place(|attr| self.process_cfg_attr(attr));
if self.in_cfg(&attrs) { Some(attrs) } else { None }
self.in_cfg(&attrs).then(|| attrs)
}
/// Performs cfg-expansion on `stream`, producing a new `AttrTokenStream`.