awk macro: handle dynamic changes in rs variable.

* awk.tl (sys:awk-state loop): The loop now notices
when rs or krs changes and switches to a new
record-adapter or to the raw stream as necessary.

* txr.1: Notes added about changes to rs and krs.

1 files changed, 12 insertions, 0 deletions

diff --git a/txr.1 b/txr.1
index e77dcb03..00822132 100644
--- a/txr.1
+++ b/txr.1
@@ -38563,6 +38563,12 @@ If a match for the record separator occurs at the end of the stream,
 it is not considered to delimit an empty record, but acts as the
 terminator for the previous record.
 
+When a new value is assigned to
+.codn rs ,
+it has no effect on the most recently scanned and delimited record which is
+still current, or previous records. The new value applies to the next, not yet
+read record.
+
 .coNP Variable @ krs
 .desc
 The awk variable
@@ -38575,6 +38581,12 @@ by the pattern in the
 .code rs
 variable is retained as part of the preceding record rather than removed.
 
+When a new value is assigned to
+.codn krs ,
+it has no effect on the most recently scanned and delimited record which is
+still current, or previous records. The new value applies to the next, not yet
+read record.
+
 .coNP Variables @ fs and @ ft
 .desc
 The awk variable