cmMakefile: store the number of last matches in a CMake var

With PushScope and PopScope, keeping track of another bit of data for
each scope isn't easy. Instead, store it as another CMake variable so it
gets implicitly tracked along with everything else.

This works in a revert of commit
7d674b5f0b28a610333644d417c2e8cb796cc9e4.

1 files changed, 58 insertions, 0 deletions

diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 53fd56f..a7acc27 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -4841,6 +4841,64 @@ std::vector<cmSourceFile*> cmMakefile::GetQtUiFilesWithOptions() const
   return this->QtUiFilesWithOptions;
 }
 
+static std::string const matchVariables[] = {
+  "CMAKE_MATCH_0",
+  "CMAKE_MATCH_1",
+  "CMAKE_MATCH_2",
+  "CMAKE_MATCH_3",
+  "CMAKE_MATCH_4",
+  "CMAKE_MATCH_5",
+  "CMAKE_MATCH_6",
+  "CMAKE_MATCH_7",
+  "CMAKE_MATCH_8",
+  "CMAKE_MATCH_9"
+};
+
+static std::string const nMatchesVariable = "CMAKE_MATCH_COUNT";
+
+//----------------------------------------------------------------------------
+void cmMakefile::ClearMatches()
+{
+  const char* nMatchesStr = this->GetDefinition(nMatchesVariable);
+  if (!nMatchesStr)
+    {
+    return;
+    }
+  int nMatches = atoi(nMatchesStr);
+  for (int i=0; i<=nMatches; i++)
+    {
+    std::string const& var = matchVariables[i];
+    std::string const& s = this->GetSafeDefinition(var);
+    if(!s.empty())
+      {
+      this->AddDefinition(var, "");
+      this->MarkVariableAsUsed(var);
+      }
+    }
+  this->AddDefinition(nMatchesVariable, "0");
+  this->MarkVariableAsUsed(nMatchesVariable);
+}
+
+//----------------------------------------------------------------------------
+void cmMakefile::StoreMatches(cmsys::RegularExpression& re)
+{
+  char highest = 0;
+  for (int i=0; i<10; i++)
+    {
+    std::string const& m = re.match(i);
+    if(!m.empty())
+      {
+      std::string const& var = matchVariables[i];
+      this->AddDefinition(var, m.c_str());
+      this->MarkVariableAsUsed(var);
+      highest = static_cast<char>('0' + i);
+      }
+    }
+  char nMatches[] = {highest, '\0'};
+  this->AddDefinition(nMatchesVariable, nMatches);
+  this->MarkVariableAsUsed(nMatchesVariable);
+}
+
 //----------------------------------------------------------------------------
 cmPolicies::PolicyStatus
 cmMakefile::GetPolicyStatus(cmPolicies::PolicyID id) const