VSinerva/compiler-course
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Clean up interpreter and align details with language spec

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This commit is contained in:
Vili Sinervä 2025-02-04 15:37:39 +02:00
parent c92ff6140e
commit 50bc35753a
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GPG key ID: DF8FEAF54EFAC996
1 changed files with 12 additions and 13 deletions
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25
src/compiler/interpreter.rs
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@ -27,13 +27,13 @@ pub fn interpret<'source>(ast: &Expression<'source>, symbols: &mut SymTab<'sourc
BinaryOp(_, left, op, right) => match *op {
"and" => {
let left_val = interpret(left, symbols);
if let Value::Bool(val_l) = left_val {
if !val_l {
if let Value::Bool(left_val) = left_val {
if !left_val {
Value::Bool(false)
} else {
let right_val = interpret(right, symbols);
if let Value::Bool(val_r) = right_val {
Value::Bool(val_r)
if let Value::Bool(right_val) = right_val {
Value::Bool(right_val)
} else {
panic!("Non-bool with and operator");
}
@ -44,19 +44,19 @@ pub fn interpret<'source>(ast: &Expression<'source>, symbols: &mut SymTab<'sourc
}
"or" => {
let left_val = interpret(left, symbols);
if let Value::Bool(val_l) = left_val {
if val_l {
if let Value::Bool(left_val) = left_val {
if left_val {
Value::Bool(true)
} else {
let right_val = interpret(right, symbols);
if let Value::Bool(val_r) = right_val {
Value::Bool(val_r)
if let Value::Bool(right_val) = right_val {
Value::Bool(right_val)
} else {
panic!("Non-bool with and operator");
panic!("Non-bool with or operator");
}
}
} else {
panic!("Non-bool with and operator");
panic!("Non-bool with or operator");
}
}
"=" => {
@ -99,12 +99,11 @@ pub fn interpret<'source>(ast: &Expression<'source>, symbols: &mut SymTab<'sourc
}
}
While(_, condition, do_expr) => {
let mut val = Value::None();
loop {
let condition = interpret(condition, symbols);
if let Value::Bool(cond) = condition {
if cond {
val = interpret(do_expr, symbols);
interpret(do_expr, symbols);
} else {
break;
}
@ -112,7 +111,7 @@ pub fn interpret<'source>(ast: &Expression<'source>, symbols: &mut SymTab<'sourc
panic!("Non-boon as while-do condition!");
}
}
val
Value::None()
}
FunCall(_, name, args) => {
let mut arg_values = Vec::new();