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let-value ast updating progress

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Anton-4 2021-08-06 19:26:25 +02:00
parent 5ab1dda836
commit 334f91392a
5 changed files with 89 additions and 28 deletions
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43
compiler/module/src/symbol.rs
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@ -66,6 +66,10 @@ impl Symbol {
}
pub fn ident_string(self, interns: &Interns) -> &InlinableString {
dbg!(&interns.all_ident_ids);
let stop = "here";
let ident_ids = interns
.all_ident_ids
.get(&self.module_id())
@ -542,6 +546,45 @@ impl IdentIds {
}
}
pub fn update_key(&mut self, old_ident_name: InlinableString, new_ident_name: InlinableString) -> Result<IdentId, String> {
let ident_id_ref_opt = self.by_ident.get(&old_ident_name);
match ident_id_ref_opt {
Some(ident_id_ref) => {
let ident_id = (*ident_id_ref).clone();
self.by_ident.remove(&old_ident_name);
self.by_ident.insert(new_ident_name.clone(), ident_id);
let by_id = &mut self.by_id;
let key_index_opt = by_id.iter().position(|x| *x == old_ident_name);
if let Some(key_index) = key_index_opt {
if let Some(vec_elt) = by_id.get_mut(key_index) {
*vec_elt = new_ident_name;
} else {
// we get the index from by_id so unless there is a bug in the rust std lib, this is unreachable
unreachable!()
}
Ok(ident_id)
} else {
Err(
format!(
"Tried to find position of key {:?} in IdentIds.by_id but I could not find the key. IdentIds.by_id: {:?}",
old_ident_name,
self.by_id
)
)
}
}
None => {
Err("Tried to update key in IdentIds but I could not find the key.".to_string())
}
}
}
/// Generates a unique, new name that's just a strigified integer
/// (e.g. "1" or "5"), using an internal counter. Since valid Roc variable
/// names cannot begin with a number, this has no chance of colliding