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add helper functions

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This commit is contained in:
Folkert 2021-08-11 20:35:02 +02:00
parent 903ac405a3
commit fd3ccaeabe
1 changed files with 15 additions and 3 deletions
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18
compiler/types/src/subs.rs
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@ -931,9 +931,21 @@ pub struct UnionTags {
}
impl UnionTags {
pub fn insert_into_subs<'a, I>(subs: &mut Subs, input: I) -> Self
pub fn len(&self) -> usize {
self.tag_names.len()
}
pub fn is_empty(&self) -> bool {
self.len() == 0
}
pub fn compare<T>(x: &(TagName, T), y: &(TagName, T)) -> std::cmp::Ordering {
first(x, y)
}
pub fn insert_into_subs<I, I2>(subs: &mut Subs, input: I) -> Self
where
I: IntoIterator<Item = (TagName, &'a [Variable])>,
I: IntoIterator<Item = (TagName, I2)>,
I2: IntoIterator<Item = Variable>,
{
let tag_names_start = subs.tag_names.len() as u32;
let variables_start = subs.variable_slices.len() as u32;
@ -946,7 +958,7 @@ impl UnionTags {
let mut length = 0;
for (k, v) in it {
let variables = VariableSubsSlice::insert_into_subs(subs, v.iter().copied());
let variables = VariableSubsSlice::insert_into_subs(subs, v.into_iter());
subs.tag_names.push(k);
subs.variable_slices.push(variables);