From 18b60d2f2b66ae09e4cfa8986b9d146a5ff784dd Mon Sep 17 00:00:00 2001
From: chrchr-github <78114321+chrchr-github@users.noreply.github.com>
Date: Sat, 3 Jun 2023 15:13:15 +0200
Subject: [PATCH] Fix  #11670 FP constStatement (inconclusive) triggered by
 namespace (#5114)

---
 lib/tokenize.cpp           |  6 +++---
 test/testsimplifyusing.cpp | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 17cb6451e..177407e7f 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -3080,15 +3080,15 @@ bool Tokenizer::simplifyUsing()
                     tok1->deletePrevious();
                     break;
                 } else {
-                    const std::string::size_type idx = fullScope.rfind(' ');
+                    const std::string::size_type idx = fullScope.rfind("::");
 
                     if (idx == std::string::npos)
                         break;
 
-                    if (tok1->strAt(-2) == fullScope.substr(idx + 1)) {
+                    if (tok1->strAt(-2) == fullScope.substr(idx + 3)) {
                         tok1->deletePrevious();
                         tok1->deletePrevious();
-                        fullScope.resize(idx - 3);
+                        fullScope.resize(idx - 1);
                     } else
                         break;
                 }
diff --git a/test/testsimplifyusing.cpp b/test/testsimplifyusing.cpp
index 2b147aee2..1a6e2fde1 100644
--- a/test/testsimplifyusing.cpp
+++ b/test/testsimplifyusing.cpp
@@ -71,6 +71,7 @@ private:
         TEST_CASE(simplifyUsing24);
         TEST_CASE(simplifyUsing25);
         TEST_CASE(simplifyUsing26); // #11090
+        TEST_CASE(simplifyUsing27);
 
         TEST_CASE(simplifyUsing8970);
         TEST_CASE(simplifyUsing8971);
@@ -656,6 +657,24 @@ private:
         ASSERT_EQUALS(expected, tok(code));
     }
 
+    void simplifyUsing27() { // #11670
+        const char code[] = "namespace N {\n"
+                            "    template <class T>\n"
+                            "    struct S {\n"
+                            "        using iterator = T*;\n"
+                            "        iterator begin();\n"
+                            "    };\n"
+                            "}\n"
+                            "using I = N::S<int>;\n"
+                            "void f() {\n"
+                            "    I::iterator iter;\n"
+                            "}\n";
+        const char expected[] = "namespace N { struct S<int> ; } "
+                                "void f ( ) { int * iter ; } "
+                                "struct N :: S<int> { int * begin ( ) ; } ;";
+        ASSERT_EQUALS(expected, tok(code));
+    }
+
     void simplifyUsing8970() {
         const char code[] = "using V = std::vector<int>;\n"
                             "struct A {\n"