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Remove unused clones in mbe

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This commit is contained in:
Edwin Cheng 2020-12-31 02:38:40 +08:00
parent 848e817f60
commit ede1b11741
1 changed files with 4 additions and 8 deletions
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12
crates/mbe/src/lib.rs
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@ -217,18 +217,14 @@ impl MacroRules {
impl Rule {
fn parse(src: &mut TtIter) -> Result<Rule, ParseError> {
let mut lhs = src
let lhs = src
.expect_subtree()
.map_err(|()| ParseError::Expected("expected subtree".to_string()))?
.clone();
lhs.delimiter = None;
.map_err(|()| ParseError::Expected("expected subtree".to_string()))?;
src.expect_char('=').map_err(|()| ParseError::Expected("expected `=`".to_string()))?;
src.expect_char('>').map_err(|()| ParseError::Expected("expected `>`".to_string()))?;
let mut rhs = src
let rhs = src
.expect_subtree()
.map_err(|()| ParseError::Expected("expected subtree".to_string()))?
.clone();
rhs.delimiter = None;
.map_err(|()| ParseError::Expected("expected subtree".to_string()))?;
let lhs = MetaTemplate { tokens: parse_pattern(&lhs), delimiter: None };
let rhs = MetaTemplate { tokens: parse_template(&rhs), delimiter: None };