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-rw-r--r--txr.111
1 files changed, 8 insertions, 3 deletions
diff --git a/txr.1 b/txr.1
index 19984c25..cefd833e 100644
--- a/txr.1
+++ b/txr.1
@@ -30985,7 +30985,7 @@ one specifies the result of
.coNP Functions @ source-loc and @ source-loc-str
.synb
.mets (source-loc << form )
-.mets (source-loc-str << form )
+.mets (source-loc-str << form <> [ alternative ])
.syne
.desc
These functions map an expression in a \*(TX program to the file name and
@@ -31009,9 +31009,14 @@ is not a piece of the program source code that was constructed by the
.code source-loc
returns
.codn nil ,
-and
+and, in the absence of the
+.meta alternative
+argument,
.code source-loc-str
-returns a string whose text says that source location is not available.
+returns a string whose text says that source location is not available,
+otherwise it returns the
+.meta alternative
+argument.
.coNP Function @ rlcp
.synb