From 694e9efc16bd0cc1c202d047afa1ed1688046e9e Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 11 Jan 2020 13:26:26 +0000
Subject: [PATCH] Syntax: Incompatible change: Use &{ not &${ for macros

This will be more orthogonal with $( which will come in a moment.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 README                        | 2 +-
 generate                      | 4 ++--
 tests/filter/Dir.sd.mk        | 2 +-
 tests/filter/extract-doctests | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/README b/README
index 4493a0d..b42356d 100644
--- a/README
+++ b/README
@@ -219,7 +219,7 @@ STUFF $ THINGS	..	STUFF $$ THINGS
 &:endm		..	endef
 	NAME is processed for &
 
-&${..$..}	=>	${eval ${call ..$$..}}
+&{..$..}	=>	${eval ${call ..$$..}}
 	(matches { } pairs to find the end)
 	content is $-doubled (unless it contains &$- to turn that off)
 
diff --git a/generate b/generate
index bcbbf79..c2dc42d 100755
--- a/generate
+++ b/generate
@@ -371,11 +371,11 @@ sub process_input_mk ($$$$) {
 		$note_varref->($2,!!$1) if m{^($esc)?([^()\$]+\))};
 	    }
 	    elsif (s{^\$(\d+)}{}) { ddbl_only($&); oud "\${$1}"; }
-	    elsif (s{^\$\{}{}) {
+	    elsif (s{^\{}{}) {
 		err 'macro invocation cannot be re-$-doubled' if $ddbl;
 		od '${eval ${call ';
 		$evalcall_brackets = 1;
-		$push_nest->('eval',1, '&${...}');
+		$push_nest->('eval',1, '&{...}');
 		$note_varref->($2,!!$1) if m{^\s*($esc)?([^,{}\$]+)};
 	    } elsif (s{^([~^]?)(?=[ \t])}{}) {
 		my $prefix = $pfxmap{$1} // die "internal error ($1?)";
diff --git a/tests/filter/Dir.sd.mk b/tests/filter/Dir.sd.mk
index a9da21f..f5e2868 100644
--- a/tests/filter/Dir.sd.mk
+++ b/tests/filter/Dir.sd.mk
@@ -14,7 +14,7 @@ WARN += 3
 # &$NOWARN1 $(NOWARN1)
 # &$NOWARN2 $(NOWARN2)
 
-&${ some-macro, 42, $x, { &$- $(foreach something) } }
+&{ some-macro, 42, $x, { &$- $(foreach something) } }
 
 $&FBAR
 
diff --git a/tests/filter/extract-doctests b/tests/filter/extract-doctests
index 130c237..e4141e6 100755
--- a/tests/filter/extract-doctests
+++ b/tests/filter/extract-doctests
@@ -147,7 +147,7 @@ sub writeout ($) {
 		      # adhoc: skip &:macro in already-doubling part
 		      return 0 if $e->{In} =~ m{^\&\:macro};
 		      # adhoc: skip &${ ie eval in already-doubling part
-		      return 0 if $e->{In} =~ m{^\&\$\{};
+		      return 0 if $e->{In} =~ m{^\&\{};
 		      return 0 if $e->{CQ};
 		      return $e->{DD} || !grep {
 			  # If there are two entries with the same In,
-- 
2.30.2