tsparser: handle unary plus and minus

encoredev · Jun 8, 2024 · fd5f92c · fd5f92c
1 parent 6f1d8de
commit fd5f92c
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/tsparser/src/parser/types/type_resolve.rs b/tsparser/src/parser/types/type_resolve.rs
@@ -752,9 +752,13 @@ impl<'a> Ctx<'a> {
                 // See https://www.typescriptlang.org/docs/handbook/2/typeof-types.html
                 ast::UnaryOp::TypeOf => Type::Basic(Basic::String),
 
-                ast::UnaryOp::Minus
-                | ast::UnaryOp::Plus
-                | ast::UnaryOp::Bang
+                ast::UnaryOp::Plus => Type::Basic(Basic::Number),
+                ast::UnaryOp::Minus => match self.expr(&expr.arg) {
+                    Type::Literal(Literal::Number(num)) => Type::Literal(Literal::Number(-num)),
+                    other => other,
+                },
+
+                ast::UnaryOp::Bang
                 | ast::UnaryOp::Tilde
                 | ast::UnaryOp::Delete => self.expr(&expr.arg),
             },