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//! Arithmetic and general binary-operator usage (Copy types, owned operands).
use crate::parser::*;
use super::Analyzer;
impl<'ast> Analyzer<'ast> {
// TDD FIX (Bug #5): `is_used_in_arithmetic_op` checks ONLY arithmetic ops, not comparisons.
pub(crate) fn is_used_in_arithmetic_op(
&self,
name: &str,
statements: &[&'ast Statement<'ast>],
) -> bool {
for stmt in statements {
match stmt {
Statement::Let { value, .. } => {
if self.expr_uses_in_arithmetic_op(name, value) {
return true;
}
}
Statement::Expression { expr, .. } => {
if self.expr_uses_in_arithmetic_op(name, expr) {
return true;
}
}
Statement::Return {
value: Some(expr), ..
} => {
if self.expr_uses_in_arithmetic_op(name, expr) {
return true;
}
}
Statement::Return { value: None, .. } => {}
Statement::If {
condition,
then_block,
else_block,
..
} => {
if self.expr_uses_in_arithmetic_op(name, condition) {
return true;
}
if self.is_used_in_arithmetic_op(name, then_block) {
return true;
}
if let Some(else_block) = else_block {
if self.is_used_in_arithmetic_op(name, else_block) {
return true;
}
}
}
Statement::While {
condition, body, ..
} => {
if self.expr_uses_in_arithmetic_op(name, condition) {
return true;
}
if self.is_used_in_arithmetic_op(name, body) {
return true;
}
}
Statement::For { body, .. } => {
if self.is_used_in_arithmetic_op(name, body) {
return true;
}
}
Statement::Assignment { value, .. } => {
if self.expr_uses_in_arithmetic_op(name, value) {
return true;
}
}
_ => {}
}
}
false
}
pub(crate) fn expr_uses_in_arithmetic_op(&self, name: &str, expr: &Expression) -> bool {
match expr {
Expression::Binary {
op, left, right, ..
} => {
use crate::parser::ast::operators::BinaryOp;
// Only check for arithmetic operators, not comparisons
let is_arithmetic = matches!(
op,
BinaryOp::Add | BinaryOp::Sub | BinaryOp::Mul | BinaryOp::Div | BinaryOp::Mod
);
if is_arithmetic {
if self.expr_is_identifier(left, name) || self.expr_is_identifier(right, name) {
return true;
}
}
// Recursively check nested expressions
self.expr_uses_in_arithmetic_op(name, left)
|| self.expr_uses_in_arithmetic_op(name, right)
}
Expression::Unary { operand, .. } => self.expr_uses_in_arithmetic_op(name, operand),
Expression::Call { arguments, .. } => arguments
.iter()
.any(|(_, arg)| self.expr_uses_in_arithmetic_op(name, arg)),
Expression::MethodCall {
object, arguments, ..
} => {
self.expr_uses_in_arithmetic_op(name, object)
|| arguments
.iter()
.any(|(_, arg)| self.expr_uses_in_arithmetic_op(name, arg))
}
Expression::FieldAccess { .. } => false,
Expression::Index { object, index, .. } => {
self.expr_uses_in_arithmetic_op(name, object)
|| self.expr_uses_in_arithmetic_op(name, index)
}
Expression::Block { statements, .. } => self.is_used_in_arithmetic_op(name, statements),
Expression::Tuple { elements, .. } => elements
.iter()
.any(|elem| self.expr_uses_in_arithmetic_op(name, elem)),
Expression::Array { elements, .. } => elements
.iter()
.any(|elem| self.expr_uses_in_arithmetic_op(name, elem)),
Expression::TryOp { expr, .. } => self.expr_uses_in_arithmetic_op(name, expr),
_ => false,
}
}
pub(crate) fn is_used_in_binary_op(
&self,
name: &str,
statements: &[&'ast Statement<'ast>],
) -> bool {
for stmt in statements {
match stmt {
Statement::Let { value, .. } => {
if self.expr_uses_in_binary_op(name, value) {
return true;
}
}
Statement::Expression { expr, .. } => {
if self.expr_uses_in_binary_op(name, expr) {
return true;
}
}
Statement::Return {
value: Some(expr), ..
} => {
if self.expr_uses_in_binary_op(name, expr) {
return true;
}
}
Statement::Return { value: None, .. } => {}
Statement::If {
condition,
then_block,
else_block,
..
} => {
if self.expr_uses_in_binary_op(name, condition) {
return true;
}
if self.is_used_in_binary_op(name, then_block) {
return true;
}
if let Some(else_b) = else_block {
if self.is_used_in_binary_op(name, else_b) {
return true;
}
}
}
Statement::Loop { body, .. }
| Statement::While { body, .. }
| Statement::For { body, .. } => {
if self.is_used_in_binary_op(name, body) {
return true;
}
}
Statement::Assignment { value, .. } => {
if self.expr_uses_in_binary_op(name, value) {
return true;
}
}
_ => {}
}
}
false
}
pub(crate) fn expr_uses_in_binary_op(&self, name: &str, expr: &Expression) -> bool {
match expr {
Expression::Binary { left, right, .. } => {
// Check if the parameter is directly used in a binary operation
// This is for Copy types like Vec2, Vec3 where `a + b` requires owned values
if self.expr_is_identifier(left, name) || self.expr_is_identifier(right, name) {
return true;
}
// Recursively check nested expressions
self.expr_uses_in_binary_op(name, left) || self.expr_uses_in_binary_op(name, right)
}
Expression::Unary { operand, .. } => self.expr_uses_in_binary_op(name, operand),
Expression::Call { arguments, .. } => arguments
.iter()
.any(|(_, arg)| self.expr_uses_in_binary_op(name, arg)),
Expression::MethodCall {
object, arguments, ..
} => {
self.expr_uses_in_binary_op(name, object)
|| arguments
.iter()
.any(|(_, arg)| self.expr_uses_in_binary_op(name, arg))
}
// CRITICAL FIX: Don't recurse into FieldAccess for binary op detection
// `self.field + value` doesn't mean `self` is used in a binary op
// We only care about the DIRECT use of the parameter, like `param + value`
Expression::FieldAccess { .. } => false,
Expression::Index { object, index, .. } => {
self.expr_uses_in_binary_op(name, object)
|| self.expr_uses_in_binary_op(name, index)
}
Expression::Block { statements, .. } => self.is_used_in_binary_op(name, statements),
// Recurse into tuple elements
Expression::Tuple { elements, .. } => elements
.iter()
.any(|elem| self.expr_uses_in_binary_op(name, elem)),
// Recurse into array elements
Expression::Array { elements, .. } => elements
.iter()
.any(|elem| self.expr_uses_in_binary_op(name, elem)),
Expression::TryOp { expr, .. } => self.expr_uses_in_binary_op(name, expr),
_ => false,
}
}
}