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-rw-r--r--src/nvim/option_vars.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/nvim/option_vars.h b/src/nvim/option_vars.h
index 13caba221f..86e7f4cee8 100644
--- a/src/nvim/option_vars.h
+++ b/src/nvim/option_vars.h
@@ -53,6 +53,9 @@
#define P_MLE 0x20000000U ///< under control of 'modelineexpr'
#define P_FUNC 0x40000000U ///< accept a function reference or a lambda
#define P_COLON 0x80000000U ///< values use colons to create sublists
+// Warning: Currently we have used all 32 bits for option flags, and adding more
+// flags will overflow it. Adding another flag will need to change how
+// it's stored first.
#define HIGHLIGHT_INIT \
"8:SpecialKey,~:EndOfBuffer,z:TermCursor,Z:TermCursorNC,@:NonText,d:Directory,e:ErrorMsg," \