Module Name: src
Committed By: rillig
Date: Sun Dec 27 23:25:33 UTC 2020
Modified Files:
src/usr.bin/make/unit-tests: var-op-expand.mk
Log Message:
make(1): add test for modifier parts in ':=' assignments
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/usr.bin/make/unit-tests/var-op-expand.mk
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/usr.bin/make/unit-tests/var-op-expand.mk
diff -u src/usr.bin/make/unit-tests/var-op-expand.mk:1.8 src/usr.bin/make/unit-tests/var-op-expand.mk:1.9
--- src/usr.bin/make/unit-tests/var-op-expand.mk:1.8 Sun Dec 27 22:29:37 2020
+++ src/usr.bin/make/unit-tests/var-op-expand.mk Sun Dec 27 23:25:33 2020
@@ -1,4 +1,4 @@
-# $NetBSD: var-op-expand.mk,v 1.8 2020/12/27 22:29:37 rillig Exp $
+# $NetBSD: var-op-expand.mk,v 1.9 2020/12/27 23:25:33 rillig Exp $
#
# Tests for the := variable assignment operator, which expands its
# right-hand side.
@@ -116,6 +116,28 @@ VAR:= top:$$ ${:Unest1\:\$\$} ${:Unest2
.endif
+# In variable assignments using the ':=' operator, there may be expressions
+# containing variable modifiers, and these modifiers may refer to other
+# variables.
+#
+# Contrary to the assignment operator '=', the assignment operator ':='
+# consumes the '$' from modifier parts.
+REF.word= 1:$$ 2:$$$$ 4:$$$$$$$$
+VAR:= ${:Uword:@word@${REF.${word}}@}, direct: ${REF.word}
+.if ${VAR} != "1:2:\$ 4:\$\$, direct: 1:\$ 2:\$\$ 4:\$\$\$\$"
+. error
+.endif
+
+
+# Just for comparison, the previous example using the assignment operator '='
+# instead of ':='.
+REF.word= 1:$$ 2:$$$$ 4:$$$$$$$$
+VAR= ${:Uword:@word@${REF.${word}}@}, direct: ${REF.word}
+.if ${VAR} != "1:\$ 2:\$\$ 4:\$\$\$\$, direct: 1:\$ 2:\$\$ 4:\$\$\$\$"
+. error
+.endif
+
+
# Between var.c 1.42 from 2000-05-11 and before parse.c 1.520 from 2020-12-27,
# if the variable name in a ':=' assignment referred to an undefined variable,
# there were actually 2 assignments to different variables:
