From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 9 Dec 2019 16:22:57 +0000 (+0000)
Subject: README: v2: Draft - macro assistance facility
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=a3f7f478a745a0bd288aa272f6dd0e38cfeee5a5;p=subdirmk.git

README: v2: Draft - macro assistance facility

Not implemented yet.  Also no S-o-b at this time!
---

diff --git a/README b/README
index e87cb80..6dd1a05 100644
--- a/README
+++ b/README
@@ -322,6 +322,32 @@ So pathname syntax is a subset of:
 	`all' is extra special: every directory has an `all'
 	target, which corresponds to &TARGETS.
 
+DRAFT - MACRO ASSISTANCE FACILITY
+---------------------------------
+
+Thanks to Mark Wooding.
+
+        &:macro NAME
+        STUFF
+        &:endm
+
+expands to
+
+        define %NAME
+        STUFF (with `$'s doubled except before a digit)
+        endef
+        NAME = $(eval $(call %NAME,$1,$2,$3,$4,$5,$6,$7,$8,$9))
+
+and
+
+        &(NAME ARG,ARG,...)
+
+expands to
+
+        $(call NAME,ARG,ARG,...)
+
+with `$'s doubled.
+
 Subdirectory and variable naming
 --------------------------------