Module Name: src
Committed By: rillig
Date: Sun Oct 18 21:37:24 UTC 2020
Modified Files:
src/usr.bin/make/unit-tests: varmod-assign.mk
Log Message:
make(1): add test for the ::+= modifier expanding its right-hand side
To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/usr.bin/make/unit-tests/varmod-assign.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/varmod-assign.mk
diff -u src/usr.bin/make/unit-tests/varmod-assign.mk:1.7 src/usr.bin/make/unit-tests/varmod-assign.mk:1.8
--- src/usr.bin/make/unit-tests/varmod-assign.mk:1.7 Sun Oct 18 21:36:22 2020
+++ src/usr.bin/make/unit-tests/varmod-assign.mk Sun Oct 18 21:37:24 2020
@@ -1,4 +1,4 @@
-# $NetBSD: varmod-assign.mk,v 1.7 2020/10/18 21:36:22 rillig Exp $
+# $NetBSD: varmod-assign.mk,v 1.8 2020/10/18 21:37:24 rillig Exp $
#
# Tests for the obscure ::= variable modifiers, which perform variable
# assignments during evaluation, just like the = operator in C.
@@ -91,3 +91,17 @@ mod-assign-shell-error:
# FIXME: the error message says: "previous" returned non-zero status
@${SH_ERR::=previous}
@${SH_ERR::!= echo word; false } echo err=${SH_ERR}
+
+# XXX: The ::= modifier expands its right-hand side, exactly once.
+# This differs subtly from normal assignments such as '+=' or '=', which copy
+# their right-hand side literally.
+APPEND.prev= previous
+APPEND.var= ${APPEND.prev}
+APPEND.indirect= indirect $${:Unot expanded}
+APPEND.dollar= $${APPEND.indirect}
+.if ${APPEND.var::+=${APPEND.dollar}} != ""
+. error
+.endif
+.if ${APPEND.var} != "previous indirect \${:Unot expanded}"
+. error
+.endif
