NetBSD/usr.bin/make/unit-tests/varmod-remember.mk

# $NetBSD: varmod-remember.mk,v 1.5 2021/03/14 17:14:15 rillig Exp $
#
# Tests for the :_ modifier, which saves the current variable value
# in the _ variable or another, to be used later again.

.if ${1 2 3:L:_:@var@${_}@} != "1 2 3 1 2 3 1 2 3"
.  error
.endif

# In the parameterized form, having the variable name on the right side of
# the = assignment operator is confusing.  In almost all other situations
# the variable name is on the left-hand side of the = operator.  Luckily
# this modifier is only rarely needed.
.if ${1 2 3:L:@var@${var:_=SAVED:}@} != "1 2 3"
.  error
.elif ${SAVED} != "3"
.  error
.endif

# The ':_' modifier takes a variable name as optional argument.  This variable
# name can refer to other variables, though this was rather an implementation
# oversight than an intended feature.  The variable name stops at the first
# '}' or ')' and thus cannot use the usual form ${VARNAME} of long variable
# names.
S=	INDIRECT_VARNAME
.if ${value:L:@var@${var:_=$S}@} != "value"
.  error
.elif ${INDIRECT_VARNAME} != "value"
.  error
.endif

all: