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fix: collapse_toplevel

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incorrect indexes and operation order (div before mult)

co-authored by electria
This commit is contained in:
Edeth-Baguette 2026-07-13 18:06:04 -07:00
commit 375d7eb95f
1 changed files with 21 additions and 21 deletions
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70
src/parse.rs
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@ -173,7 +173,7 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
_ => panic!("operator is missing an operand"),
};
nodes.remove(operator);
nodes.remove(start + operator);
end -= 1;
}
while let Some(operator) = nodes[start..end]
@ -185,7 +185,7 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
_ => panic!("operator is missing an operand"),
};
nodes.remove(operator);
nodes.remove(start + operator);
end -= 1;
}
@ -204,31 +204,10 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
let number = lhs.pow(rhs).complete(PREC);
nodes.remove(operator - 1);
nodes.remove(operator - 1);
nodes.remove(start + operator - 1);
nodes.remove(start + operator - 1);
end -= 2;
nodes[operator - 1] = Node::Number(number);
}
while let Some(operator) = nodes[start..end]
.iter()
.position(|n| *n == Node::Operator(Operator::Mult))
{
let lhs = match &nodes[start..end][operator - 1] {
Node::Number(n) => n,
_ => panic!("operator is missing an operand"),
};
let rhs = match &nodes[start..end][operator + 1] {
Node::Number(n) => n,
_ => panic!("operator is missing an operand"),
};
let number = (lhs * rhs).complete(PREC);
nodes.remove(operator - 1);
nodes.remove(operator - 1);
end -= 2;
nodes[operator - 1] = Node::Number(number);
nodes[start + operator - 1] = Node::Number(number);
}
while let Some(operator) = nodes[start..end]
@ -246,10 +225,31 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
let number = (lhs / rhs).complete(PREC);
nodes.remove(operator - 1);
nodes.remove(operator - 1);
nodes.remove(start + operator - 1);
nodes.remove(start + operator - 1);
end -= 2;
nodes[operator - 1] = Node::Number(number);
nodes[start + operator - 1] = Node::Number(number);
}
while let Some(operator) = nodes[start..end]
.iter()
.position(|n| *n == Node::Operator(Operator::Mult))
{
let lhs = match &nodes[start..end][operator - 1] {
Node::Number(n) => n,
_ => panic!("operator is missing an operand"),
};
let rhs = match &nodes[start..end][operator + 1] {
Node::Number(n) => n,
_ => panic!("operator is missing an operand"),
};
let number = (lhs * rhs).complete(PREC);
nodes.remove(start + operator - 1);
nodes.remove(start + operator - 1);
end -= 2;
nodes[start + operator - 1] = Node::Number(number);
}
while let Some(operator) = nodes[start..end]
@ -267,10 +267,10 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
let number = (lhs + rhs).complete(PREC);
nodes.remove(operator - 1);
nodes.remove(operator - 1);
nodes.remove(start + operator - 1);
nodes.remove(start + operator - 1);
end -= 2;
nodes[operator - 1] = Node::Number(number);
nodes[start + operator - 1] = Node::Number(number);
}
while let Some(operator) = nodes[start..end]
@ -288,10 +288,10 @@ fn collapse_toplevel(nodes: &mut Vec<Node>, mut end: usize) {
let number = (lhs - rhs).complete(PREC);
nodes.remove(operator - 1);
nodes.remove(operator - 1);
nodes.remove(start + operator - 1);
nodes.remove(start + operator - 1);
end -= 2;
nodes[operator - 1] = Node::Number(number);
nodes[start + operator - 1] = Node::Number(number);
}
if nodes.len() > 1 {