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Error and exit if a label is defined more than once

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Fixes issue #2
This commit is contained in:
Ry 2023-01-22 17:22:24 -08:00
parent 2284d0fb11
commit b40c8d50b6
1 changed files with 5 additions and 0 deletions
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5
src/main.rs
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@ -356,6 +356,11 @@ fn main() {
for node in ast.unwrap() { for node in ast.unwrap() {
if let AstNode::LabelDefine {name, ..} = node { if let AstNode::LabelDefine {name, ..} = node {
let mut address_table = LABEL_ADDRESSES.lock().unwrap(); let mut address_table = LABEL_ADDRESSES.lock().unwrap();
if let Some(_) = address_table.get(&name) {
// this label already exists, print an error and exit
println!("Label \"{}\" was defined more than once!", name);
exit(1);
}
address_table.insert(name.clone(), (current_address, false)); address_table.insert(name.clone(), (current_address, false));
std::mem::drop(address_table); std::mem::drop(address_table);
} else if let AstNode::Constant {name, address} = node { } else if let AstNode::Constant {name, address} = node {