diff options
Diffstat (limited to 'contrib/bmake/unit-tests/varparse-undef-partial.mk')
| -rw-r--r-- | contrib/bmake/unit-tests/varparse-undef-partial.mk | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/contrib/bmake/unit-tests/varparse-undef-partial.mk b/contrib/bmake/unit-tests/varparse-undef-partial.mk index 27f44d79b31a..9a5704265086 100644 --- a/contrib/bmake/unit-tests/varparse-undef-partial.mk +++ b/contrib/bmake/unit-tests/varparse-undef-partial.mk @@ -1,7 +1,7 @@ -# $NetBSD: varparse-undef-partial.mk,v 1.3 2020/11/04 05:10:01 rillig Exp $ +# $NetBSD: varparse-undef-partial.mk,v 1.5 2024/01/07 11:39:04 rillig Exp $ # When an undefined variable is expanded in a ':=' assignment, only the -# initial '$' of the variable expression is skipped by the parser, while +# initial '$' of the expression is skipped by the parser, while # the remaining expression is evaluated. In edge cases this can lead to # a completely different interpretation of the partially expanded text. @@ -11,11 +11,10 @@ PARAM= :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 '$' of that whole expression is skipped by the -# parser (see Var_Subst, the Buf_AddByte in the else branch) and the rest -# of the expression is expanded as usual. +# therefore the initial '$' of that whole expression is skipped by the parser +# (see VarSubstExpr) and the rest of the expression is expanded as usual. # -# The resulting variable expression is ${VAR.:Q}, which means that the +# The resulting expression is ${VAR.:Q}, which means that the # interpretation of the ":Q" has changed from being part of the variable # name to being a variable modifier. This is a classical code injection. EVAL:= ${LIST} @@ -37,7 +36,7 @@ ${:UVAR.\:Q}= var-dot with parameter :Q # In contrast to the previous line, evaluating the original LIST again now # 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. +# variable name, as would be expected from reading the expression. EVAL:= ${LIST} .if ${EVAL} != "defined var-dot with parameter :Q end" . error ${EVAL} |