From c1f1aedcee3e24f96ec129105ae0119f3201d1cc Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 4 Oct 2023 15:12:47 -0400
Subject: cmStandardLevelResolver: Add method to look up standard level by name

---
 Source/cmStandardLevelResolver.cxx | 23 +++++++++++++++++++++++
 Source/cmStandardLevelResolver.h   |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/Source/cmStandardLevelResolver.cxx b/Source/cmStandardLevelResolver.cxx
index 4a149e0..e814690 100644
--- a/Source/cmStandardLevelResolver.cxx
+++ b/Source/cmStandardLevelResolver.cxx
@@ -457,6 +457,19 @@ struct StandardLevelComputer
     return maxLevel;
   }
 
+  cm::optional<cmStandardLevel> LanguageStandardLevel(
+    std::string const& standardStr) const
+  {
+    cm::optional<cmStandardLevel> langLevel;
+    auto const& stds = this->Levels;
+    auto stdIt =
+      std::find(cm::cbegin(stds), cm::cend(stds), ParseStd(standardStr));
+    if (stdIt != cm::cend(stds)) {
+      langLevel = cmStandardLevel(std::distance(cm::cbegin(stds), stdIt));
+    }
+    return langLevel;
+  }
+
   bool IsLaterStandard(int lhs, int rhs) const
   {
     auto rhsIt =
@@ -661,6 +674,16 @@ cmStandardLevelResolver::CompileFeatureStandardLevel(
   return mapping->second.CompileFeatureStandardLevel(this->Makefile, feature);
 }
 
+cm::optional<cmStandardLevel> cmStandardLevelResolver::LanguageStandardLevel(
+  std::string const& lang, std::string const& standardStr) const
+{
+  auto mapping = StandardComputerMapping.find(lang);
+  if (mapping == cm::cend(StandardComputerMapping)) {
+    return cm::nullopt;
+  }
+  return mapping->second.LanguageStandardLevel(standardStr);
+}
+
 cmValue cmStandardLevelResolver::CompileFeaturesAvailable(
   const std::string& lang, std::string* error) const
 {
diff --git a/Source/cmStandardLevelResolver.h b/Source/cmStandardLevelResolver.h
index 09989ba..29cab55 100644
--- a/Source/cmStandardLevelResolver.h
+++ b/Source/cmStandardLevelResolver.h
@@ -39,6 +39,9 @@ public:
   cm::optional<cmStandardLevel> CompileFeatureStandardLevel(
     std::string const& lang, std::string const& feature) const;
 
+  cm::optional<cmStandardLevel> LanguageStandardLevel(
+    std::string const& lang, std::string const& standardStr) const;
+
   cmValue CompileFeaturesAvailable(const std::string& lang,
                                    std::string* error) const;
 
-- 
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