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1 files changed, 5 insertions, 0 deletions

diff --git a/src/parser.h b/src/parser.h
index 6392c24..1b91498 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -10,6 +10,11 @@
 #include "types.h"
 
 enum {
+	/* The first four AST tokens are declarations.  A declaration is any token T
+	   for which ‘T <= _AST_DECLS_END’ holds.  Declarations can also be made
+	   public by using the ‘pub’ keyword, and you can tell if a declaration is
+	   public by if the LSB is set. */
+
 	/* Variable declaration, lhs and rhs may be unused
 	   ‘x: lhs = rhs’ */
 	ASTDECL,