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fixed bug where all but the first loop iterations would write data to the mutable variables from the last iteration(s) even though the variables are supposed to be completely local: is_init can be set on steatements that have an output_to to force them to always redeclare and never reassign the new value.

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mark 2023-05-11 01:56:33 +02:00
parent 9ec4acaf70
commit 79b169d951
2 changed files with 19 additions and 13 deletions
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26
mers/src/script/code_runnable.rs
View File

@ -81,27 +81,33 @@ impl RFunction {
#[derive(Clone, Debug)]
pub struct RStatement {
pub output_to: Option<(usize, usize)>,
// (_, _, is_init)
pub output_to: Option<(usize, usize, bool)>,
statement: Box<RStatementEnum>,
pub force_output_type: Option<VType>,
}
impl RStatement {
pub fn run(&self, vars: &mut Vec<VData>, info: &GSInfo) -> VData {
let out = self.statement.run(vars, info);
if let Some((v, derefs)) = self.output_to {
let mut val = dereference_n(&mut vars[v], derefs);
fn dereference_n(d: &mut VData, n: usize) -> VData {
if n > 0 {
if let VDataEnum::Reference(v) = &mut d.data.lock().unwrap().0 {
dereference_n(v, n - 1)
if let Some((v, derefs, is_init)) = self.output_to {
// let mut parent = None;
let mut val = &mut vars[v];
fn deref(n: usize, val: &mut VData, is_init: bool, out: VData) {
if n == 0 {
if is_init {
*val = out.inner().to();
} else {
unreachable!("dereferencing something that isn't a reference in assignment")
val.assign(out.inner());
}
} else {
d.clone_mut()
if let VDataEnum::Reference(r) = &mut val.data().0 {
deref(n - 1, r, is_init, out)
} else {
unreachable!("cannot derefence: not a reference.");
}
}
}
val.assign(out.inner());
deref(derefs, val, is_init, out);
VDataEnum::Tuple(vec![]).to()
} else {
out

6
mers/src/script/to_runnable.rs
View File

@ -652,11 +652,11 @@ fn statement(
));
}
linfo.vars.insert(opt.clone(), (ginfo.vars, out));
statement.output_to = Some((ginfo.vars, 0));
statement.output_to = Some((ginfo.vars, 0, true));
ginfo.vars += 1;
} else {
// mutate existing variable
statement.output_to = Some((*var_id, *derefs));
statement.output_to = Some((*var_id, *derefs, false));
}
} else {
let mut out = statement.out(ginfo);
@ -672,7 +672,7 @@ fn statement(
}
}
linfo.vars.insert(opt.clone(), (ginfo.vars, out));
statement.output_to = Some((ginfo.vars, *derefs));
statement.output_to = Some((ginfo.vars, *derefs, true));
ginfo.vars += 1;
}
}