================
@@ -64,6 +64,17 @@ void RenderDiagnosticDetails(Stream &stream,
bool show_inline,
llvm::ArrayRef<DiagnosticDetail> details);
+/// Returns whether or not the current terminal supports Unicode rendering.
+///
+/// The value is cached after the first computation.
+///
+/// On POSIX systems, we check if the LANG environment variable contains the
+/// substring "UTF-8";
----------------
adrian-prantl wrote:
That's so much better than checking for color!
https://github.com/llvm/llvm-project/pull/167550
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