diff options
Diffstat (limited to 'unit-tests/varparse-errors.mk')
| -rw-r--r-- | unit-tests/varparse-errors.mk | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/unit-tests/varparse-errors.mk b/unit-tests/varparse-errors.mk index f0947bb9410a..51a403fa898f 100644 --- a/unit-tests/varparse-errors.mk +++ b/unit-tests/varparse-errors.mk @@ -1,4 +1,4 @@ -# $NetBSD: varparse-errors.mk,v 1.4 2021/03/15 12:15:03 rillig Exp $ +# $NetBSD: varparse-errors.mk,v 1.5 2022/01/24 22:59:49 rillig Exp $ # Tests for parsing and evaluating all kinds of variable expressions. # @@ -48,4 +48,24 @@ VAR.${:U:Z}post= unknown modifier with text in the variable name . error .endif +# Demonstrate an edge case in which the 'static' for 'errorReported' in +# Var_Subst actually makes a difference, preventing "a plethora of messages". +# Given that this is an edge case and the error message is wrong and thus +# misleading anyway, that piece of code is probably not necessary. The wrong +# condition was added in var.c 1.185 from 2014-05-19. +# +# To trigger this difference, the variable assignment must use the assignment +# operator ':=' to make VarEvalMode_ShouldKeepUndef return true. There must +# be 2 expressions that create a parse error, which in this case is ':OX'. +# These expressions must be nested in some way. The below expressions are +# minimal, that is, removing any part of it destroys the effect. +# +# Without the 'static', there would be one more message like this: +# Undefined variable "${:U:OX" +# +#.MAKEFLAGS: -dv +IND= ${:OX} +_:= ${:U:OX:U${IND}} ${:U:OX:U${IND}} +#.MAKEFLAGS: -d0 + all: |