[libcxx-commits] [PATCH] D152106: [libc++][test] Removes old fallbacks.

[Mark de Wever via Phabricator via libcxx-commits]

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All supported compilers support the -std=year except Clang < 17 which
doesn't support C++23. This fallback is marked for removal once we no
longer support Clang 16.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152106

Files:
  libcxx/utils/libcxx/test/params.py


Index: libcxx/utils/libcxx/test/params.py
===================================================================
--- libcxx/utils/libcxx/test/params.py
+++ libcxx/utils/libcxx/test/params.py
@@ -56,18 +56,15 @@
 
 
 def getStdFlag(cfg, std):
-    fallbacks = {
-        "c++11": "c++0x",
-        "c++14": "c++1y",
-        "c++17": "c++1z",
-        "c++20": "c++2a",
-        "c++23": "c++2b",
-    }
     # TODO(LLVM-17) Remove this clang-tidy-16 work-around
     if std == "c++23":
         std = "c++2b"
     if hasCompileFlag(cfg, "-std=" + std):
         return "-std=" + std
+    # TODO(LLVM-19) Remove the fallbacks needed for Clang 16.
+    fallbacks = {
+        "c++23": "c++2b",
+    }
     if std in fallbacks and hasCompileFlag(cfg, "-std=" + fallbacks[std]):
         return "-std=" + fallbacks[std]
     return None


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