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swc-project · Apr 4, 2023 · 9610499 · 9610499
1 parent 18a699c
commit 9610499
Showing 1 changed file with 31 additions and 6 deletions.
diff --git a/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs b/crates/swc_ecma_usage_analyzer/src/analyzer/mod.rs
@@ -1205,19 +1205,44 @@ where
                 ..self.ctx
             };
 
-            if let Some(..) = &self.marks {
+            if let Some(marks) = &self.marks {
                 if let VarDeclarator {
                     name: Pat::Ident(id),
-                    init: Some(..),
+                    init: Some(init),
                     definite: false,
                     ..
                 } = e
                 {
+                    // TODO: merge with may_have_side_effects
+
                     let id = id.to_id();
-                    self.used_recursively
-                        .insert(id.clone(), RecursiveUsage::Var { can_ignore: false });
-                    e.init.visit_with(&mut *self.with_ctx(ctx));
-                    self.used_recursively.remove(&id);
+
+                    match init {
+                        Expr::Call(call) => {
+                            let can_ignore = call.span.has_mark(marks.pure);
+
+                            self.used_recursively
+                                .insert(id.clone(), RecursiveUsage::Var { can_ignore });
+
+                            call.callee.visit_with(&mut *self.with_ctx(ctx));
+
+                            self.used_recursively.remove(&id);
+
+                            self.used_recursively
+                                .insert(id.clone(), RecursiveUsage::Var { can_ignore: false });
+                            call.args.visit_with(&mut *self.with_ctx(ctx));
+                            self.used_recursively.remove(&id);
+                        }
+                        _ => {
+                            self.used_recursively
+                                .insert(id.clone(), RecursiveUsage::Var { can_ignore: false });
+
+                            e.init.visit_with(&mut *self.with_ctx(ctx));
+
+                            self.used_recursively.remove(&id);
+                        }
+                    }
+
                     return;
                 }
             }