* lib/idx.h (pIDX): New macro.
---
ChangeLog | 5 +++++
lib/idx.h | 4 ++++
2 files changed, 9 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index b98de6bf6..4e8242ade 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-14 Paul Eggert <egg...@cs.ucla.edu>
+
+ idx: new printf/scanf length modifier macro
+ * lib/idx.h (pIDX): New macro.
+
2021-06-13 Bruno Haible <br...@clisp.org>
Align 2011-11-26 patch to 2021-04-11 patch (regression from 2021-04-11).
diff --git a/lib/idx.h b/lib/idx.h
index 483587eab..28fd4ea72 100644
--- a/lib/idx.h
+++ b/lib/idx.h
@@ -107,6 +107,10 @@ typedef ptrdiff_t idx_t;
/* IDX_MAX is the maximum value of an idx_t. */
#define IDX_MAX PTRDIFF_MAX
+/* A printf/scanf length modifier for idx_t. For example, if i is an idx_t,
+ printf ("i = %"pIDX"d\n", i) outputs i's value. */
+#define pIDX "t"
+
/* So far no need has been found for an IDX_WIDTH macro.
Perhaps there should be another macro IDX_VALUE_BITS that does not
count the sign bit and is therefore one less than PTRDIFF_WIDTH. */
--
2.30.2
