From 8aa96ee55ad542e8d5ea6b0d9389acd3b69f49d9 Mon Sep 17 00:00:00 2001
From: chrchr-github <christian.riesch@live.com>
Date: Sat, 15 Jun 2024 23:16:33 +0200
Subject: [PATCH] Remove unnecessary stack

---
 lib/symboldatabase.cpp | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 362ae32b2d89..c84fb70c2ee8 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -1564,29 +1564,25 @@ namespace {
         }
     };
     using ExprIdMap = std::map<ExprIdKey, nonneg int>;
-    void setParentExprId(Token* tokStart, ExprIdMap& exprIdMap, nonneg int &id) {
-        std::stack<Token*> tokens;
-        tokens.push(tokStart);
-        while (!tokens.empty()) {
-            Token* tok = tokens.top();
-            tokens.pop();
+    void setParentExprId(Token* tok, ExprIdMap& exprIdMap, nonneg int &id) {
+        for (;;) {
             if (!tok->astParent() || tok->astParent()->isControlFlowKeyword())
-                continue;
+                break;
             const Token* op1 = tok->astParent()->astOperand1();
             if (op1 && op1->exprId() == 0 && !Token::Match(op1, "[{[]"))
-                continue;
+                break;
             const Token* op2 = tok->astParent()->astOperand2();
             if (op2 && op2->exprId() == 0 &&
                 !((tok->astParent()->astParent() && tok->astParent()->isAssignmentOp() && tok->astParent()->astParent()->isAssignmentOp()) ||
                   isLambdaCaptureList(op2) ||
                   (op2->str() == "(" && isLambdaCaptureList(op2->astOperand1())) ||
                   Token::simpleMatch(op2, "{ }")))
-                continue;
+                break;
 
             if (tok->astParent()->isExpandedMacro() || Token::Match(tok->astParent(), "++|--")) {
                 tok->astParent()->exprId(id);
                 ++id;
-                tokens.push(tok->astParent());
+                tok = tok->astParent();
                 continue;
             }
 
@@ -1647,7 +1643,7 @@ namespace {
             else {
                 tok->astParent()->exprId(it->second);
             }
-            tokens.push(tok->astParent());
+            tok = tok->astParent();
         }
     }
 }