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[src/trunk]: src/usr.bin/make/unit-tests make(1): fix typo and reasoning in t...
details: https://anonhg.NetBSD.org/src/rev/6f855e1d53b5
branches: trunk
changeset: 942027:6f855e1d53b5
user: rillig <rillig%NetBSD.org@localhost>
date: Wed Nov 04 05:10:01 2020 +0000
description:
make(1): fix typo and reasoning in test varparse-undef-partial.mk
diffstat:
usr.bin/make/unit-tests/varparse-undef-partial.mk | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diffs (38 lines):
diff -r 79fb0c896b83 -r 6f855e1d53b5 usr.bin/make/unit-tests/varparse-undef-partial.mk
--- a/usr.bin/make/unit-tests/varparse-undef-partial.mk Wed Nov 04 04:49:32 2020 +0000
+++ b/usr.bin/make/unit-tests/varparse-undef-partial.mk Wed Nov 04 05:10:01 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: varparse-undef-partial.mk,v 1.2 2020/09/27 09:53:41 rillig Exp $
+# $NetBSD: varparse-undef-partial.mk,v 1.3 2020/11/04 05:10:01 rillig Exp $
# When an undefined variable is expanded in a ':=' assignment, only the
# initial '$' of the variable expression is skipped by the parser, while
@@ -9,7 +9,7 @@
DEF= defined
PARAM= :Q
-# The expression ${VAR.{PARAM}} refers to the variable named "VAR.:Q",
+# The expression ${VAR.${PARAM}} refers to the variable named "VAR.:Q",
# with the ":Q" being part of the name. This variable is not defined,
# therefore the initial '$' of that whole expression is skipped by the
# parser (see Var_Subst, the Buf_AddByte in the else branch) and the rest
@@ -28,15 +28,15 @@
${:UVAR.\:Q}= var-dot with parameter :Q
# At this point, the variable "VAR." is defined, therefore the expression
-# ${VAR.:Q} is expanded as usual.
+# ${VAR.:Q} is expanded, consisting of the variable name "VAR." and the
+# modifier ":Q".
.if ${EVAL} != "defined var-dot\\ without\\ parameter end"
. error ${EVAL}
.endif
# In contrast to the previous line, evaluating the original LIST again now
-# produces a different result since the ":Q" has already been inserted
-# literally into the expression. The variable named "VAR.:Q" is defined,
-# therefore it is resolved as usual. The ":Q" is interpreted as part of the
+# produces a different result since the variable named "VAR.:Q" is now
+# defined. It is expanded as usual, interpreting the ":Q" as part of the
# variable name, as would be expected from reading the variable expression.
EVAL:= ${LIST}
.if ${EVAL} != "defined var-dot with parameter :Q end"
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