[src/trunk]: src/usr.bin/make/unit-tests make(1): add test for combining :sh ...

[rillig <rillig%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/cc6872864c79
branches:  trunk
changeset: 955573:cc6872864c79
user:      rillig <rillig%NetBSD.org@localhost>
date:      Sun Oct 04 08:32:52 2020 +0000

description:
make(1): add test for combining :sh with +=

diffstat:

 usr.bin/make/unit-tests/var-op-sunsh.mk |  17 ++++++++++++++---
 1 files changed, 14 insertions(+), 3 deletions(-)

diffs (37 lines):

diff -r 203103d29b06 -r cc6872864c79 usr.bin/make/unit-tests/var-op-sunsh.mk
--- a/usr.bin/make/unit-tests/var-op-sunsh.mk   Sun Oct 04 08:22:59 2020 +0000
+++ b/usr.bin/make/unit-tests/var-op-sunsh.mk   Sun Oct 04 08:32:52 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: var-op-sunsh.mk,v 1.4 2020/10/04 08:14:35 rillig Exp $
+# $NetBSD: var-op-sunsh.mk,v 1.5 2020/10/04 08:32:52 rillig Exp $
 #
 # Tests for the :sh= variable assignment operator, which runs its right-hand
 # side through the shell.  It is a seldom-used alternative to the !=
@@ -82,8 +82,9 @@
 # Parse_DoVar completely trusts Parse_IsVar to properly verify the syntax.
 #
 # The ':sh' is the only word that may occur between the variable name and
-# the assignment operator.  All other words would lead to a parse error
-# since the left-hand side of an assignment must be exactly one word.
+# the assignment operator at nesting level 0.  All other words would lead
+# to a parse error since the left-hand side of an assignment must be
+# exactly one word.
 VAR :sh :sh :sh :sh=   echo multiple
 .if ${VAR} != "multiple"
 .  error
@@ -107,5 +108,15 @@
 .  error
 .endif
 
+# Syntactically, the ':sh' modifier can be combined with the '+=' assignment
+# operator.  In such a case the ':sh' modifier is silently ignored.
+#
+# XXX: This combination should not be allowed at all.
+VAR=           one
+VAR :sh +=     echo two
+.if ${VAR} != "one echo two"
+.  error ${VAR}
+.endif
+
 all:
        @:;