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Pre: use ..Default approach for use_as_template and make_receptacle.

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I decided this was more efficient (no temporary attributes and
mutability) and less confusing.
This commit is contained in:
Richard Newman 2017-04-12 11:03:44 -07:00
parent 98ac559894
commit 79ccd818f3
1 changed files with 18 additions and 20 deletions
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38
query-algebrizer/src/clauses/mod.rs
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@ -221,31 +221,29 @@ impl ConjoiningClauses {
/// Cloning.
impl ConjoiningClauses {
fn make_receptacle(&self) -> ConjoiningClauses {
let mut concrete = ConjoiningClauses::default();
concrete.empty_because = self.empty_because.clone();
concrete.alias_counter = self.alias_counter.clone();
concrete.input_variables = self.input_variables.clone();
concrete.value_bindings = self.value_bindings.clone();
concrete.known_types = self.known_types.clone();
concrete.extracted_types = self.extracted_types.clone();
concrete
ConjoiningClauses {
alias_counter: self.alias_counter.clone(),
empty_because: self.empty_because.clone(),
input_variables: self.input_variables.clone(),
value_bindings: self.value_bindings.clone(),
known_types: self.known_types.clone(),
extracted_types: self.extracted_types.clone(),
..Default::default()
}
}
/// Make a new CC populated with the relevant variable associations in this CC.
/// The CC shares an alias count with all of its copies.
fn use_as_template(&self, vars: &BTreeSet<Variable>) -> ConjoiningClauses {
let mut template = ConjoiningClauses::default();
template.alias_counter = self.alias_counter.clone(); // Rc ftw.
template.empty_because = self.empty_because.clone();
template.input_variables = self.input_variables.intersection(vars).cloned().collect();
template.value_bindings = self.value_bindings.with_intersected_keys(&vars);
template.known_types = self.known_types.with_intersected_keys(&vars);
template.extracted_types = self.extracted_types.with_intersected_keys(&vars);
template
ConjoiningClauses {
alias_counter: self.alias_counter.clone(),
empty_because: self.empty_because.clone(),
input_variables: self.input_variables.intersection(vars).cloned().collect(),
value_bindings: self.value_bindings.with_intersected_keys(&vars),
known_types: self.known_types.with_intersected_keys(&vars),
extracted_types: self.extracted_types.with_intersected_keys(&vars),
..Default::default()
}
}
}