[libcxx-commits] [libcxx] [libcxx] Add local %T substitution (PR #160026)

[Louis Dionne via libcxx-commits]

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@@ -92,6 +92,7 @@ def parseScript(test, preamble):
     #       errors, which doesn't make sense for clang-verify tests because we may want to check
     #       for specific warning diagnostics.
     _checkBaseSubstitutions(substitutions)
+    substitutions.append(("%T", tmpDir))
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ldionne wrote:

I would suggest introducing this as `%{temp}` and documenting it officially as a substitution added by the libc++ testing format instead. Once `%T` is removed in Lit, this substitution will become seemingly random for anybody who isn't familiar with the current `%T` substitution provided by Lit.

https://github.com/llvm/llvm-project/pull/160026