88 lines
2.9 KiB
Makefile
88 lines
2.9 KiB
Makefile
# $NetBSD: varparse-errors.mk,v 1.8 2023/02/14 21:56:48 rillig Exp $
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# Tests for parsing and evaluating all kinds of variable expressions.
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#
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# This is the basis for redesigning the error handling in Var_Parse and
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# Var_Subst, collecting typical and not so typical use cases.
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#
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# See also:
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# Var_Parse
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# Var_Subst
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PLAIN= plain value
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LITERAL_DOLLAR= To get a dollar, double $$ it.
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INDIRECT= An ${:Uindirect} value.
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REF_UNDEF= A reference to an ${UNDEF}undefined variable.
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ERR_UNCLOSED= An ${UNCLOSED variable expression.
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ERR_BAD_MOD= An ${:Uindirect:Z} expression with an unknown modifier.
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ERR_EVAL= An evaluation error ${:Uvalue:C,.,\3,}.
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# In a conditional, a variable expression that is not enclosed in quotes is
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# expanded using the mode VARE_UNDEFERR.
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# The variable itself must be defined.
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# It may refer to undefined variables though.
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.if ${REF_UNDEF} != "A reference to an undefined variable."
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. error
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.endif
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# As of 2020-12-01, errors in the variable name are silently ignored.
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# Since var.c 1.754 from 2020-12-20, unknown modifiers at parse time result
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# in an error message and a non-zero exit status.
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VAR.${:U:Z}= unknown modifier in the variable name
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.if ${VAR.} != "unknown modifier in the variable name"
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. error
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.endif
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# As of 2020-12-01, errors in the variable name are silently ignored.
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# Since var.c 1.754 from 2020-12-20, unknown modifiers at parse time result
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# in an error message and a non-zero exit status.
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VAR.${:U:Z}post= unknown modifier with text in the variable name
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.if ${VAR.post} != "unknown modifier with text in the variable name"
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. error
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.endif
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# Demonstrate an edge case in which the 'static' for 'errorReported' in
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# Var_Subst actually makes a difference, preventing "a plethora of messages".
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# Given that this is an edge case and the error message is wrong and thus
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# misleading anyway, that piece of code is probably not necessary. The wrong
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# condition was added in var.c 1.185 from 2014-05-19.
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#
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# To trigger this difference, the variable assignment must use the assignment
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# operator ':=' to make VarEvalMode_ShouldKeepUndef return true. There must
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# be 2 expressions that create a parse error, which in this case is ':OX'.
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# These expressions must be nested in some way. The below expressions are
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# minimal, that is, removing any part of it destroys the effect.
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#
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# Without the 'static', there would be one more message like this:
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# Undefined variable "${:U:OX"
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#
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#.MAKEFLAGS: -dv
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IND= ${:OX}
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_:= ${:U:OX:U${IND}} ${:U:OX:U${IND}}
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#.MAKEFLAGS: -d0
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# Before var.c 1.032 from 2022-08-24, make complained about 'Unknown modifier'
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# or 'Bad modifier' when in fact the modifier was entirely correct, it was
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# just not delimited by either ':' or '}' but instead by '\0'.
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UNCLOSED:= ${:U:Q
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UNCLOSED:= ${:U:sh
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UNCLOSED:= ${:U:tA
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UNCLOSED:= ${:U:tsX
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UNCLOSED:= ${:U:ts
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UNCLOSED:= ${:U:ts\040
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UNCLOSED:= ${:U:u
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UNCLOSED:= ${:U:H
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UNCLOSED:= ${:U:[1]
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UNCLOSED:= ${:U:hash
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UNCLOSED:= ${:U:range
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UNCLOSED:= ${:U:_
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UNCLOSED:= ${:U:gmtime
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UNCLOSED:= ${:U:localtime
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