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revset: add EagerRevset::empty() constructor for convenience

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This commit is contained in:
Yuya Nishihara 2022-11-07 16:41:53 +09:00
parent 46fe0791e8
commit ed14292aa2
1 changed files with 9 additions and 3 deletions
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12
lib/src/revset.rs
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@ -1152,6 +1152,14 @@ struct EagerRevset<'repo> {
index_entries: Vec<IndexEntry<'repo>>, index_entries: Vec<IndexEntry<'repo>>,
} }
impl EagerRevset<'static> {
pub const fn empty() -> Self {
EagerRevset {
index_entries: Vec::new(),
}
}
}
impl<'repo> Revset<'repo> for EagerRevset<'repo> { impl<'repo> Revset<'repo> for EagerRevset<'repo> {
fn iter<'revset>(&'revset self) -> RevsetIterator<'revset, 'repo> { fn iter<'revset>(&'revset self) -> RevsetIterator<'revset, 'repo> {
RevsetIterator::new(Box::new(self.index_entries.iter().cloned())) RevsetIterator::new(Box::new(self.index_entries.iter().cloned()))
@ -1403,9 +1411,7 @@ pub fn evaluate_expression<'repo>(
workspace_ctx: Option<&RevsetWorkspaceContext>, workspace_ctx: Option<&RevsetWorkspaceContext>,
) -> Result<Box<dyn Revset<'repo> + 'repo>, RevsetError> { ) -> Result<Box<dyn Revset<'repo> + 'repo>, RevsetError> {
match expression { match expression {
RevsetExpression::None => Ok(Box::new(EagerRevset { RevsetExpression::None => Ok(Box::new(EagerRevset::empty())),
index_entries: vec![],
})),
RevsetExpression::All => evaluate_expression( RevsetExpression::All => evaluate_expression(
repo, repo,
&RevsetExpression::visible_heads().ancestors(), &RevsetExpression::visible_heads().ancestors(),