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| -rw-r--r-- | txr.1 | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -10919,6 +10919,19 @@ or lexically precedes the reference. Forward references such as .code "(#1# #1=(1 2))" are not supported. +.TP* "Note:" +Circular notation can span hash table literals. The syntax +.code "#1=#H(() (#1# #1#))" +denotes an +.codn eql -based +hash table which contains one entry, in which that +same table itself is both the key and value. This kind of +circularity is not supported for +.codn equal -based +hash tables. The analogous syntax +.code "#1=#H((:equal-based) (#1# #1#))" +produces a hash table in an inconsistent state. + .TP* "Dialect note:" Circle notation is taken from Common Lisp, intended to be unsurprising to users familiar with that |