1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
# $Id: moderrs.mk,v 1.1.1.8 2020/08/26 16:40:43 sjg Exp $
#
# various modifier error tests
VAR=TheVariable
# incase we have to change it ;-)
MOD_UNKN=Z
MOD_TERM=S,V,v
MOD_S:= ${MOD_TERM},
FIB= 1 1 2 3 5 8 13 21 34
all: modunkn modunknV varterm vartermV modtermV modloop
all: modloop-close
all: modwords
all: modexclam
all: mod-subst-delimiter
all: mod-regex-delimiter
all: mod-regex-undefined-subexpression
all: mod-ts-parse
all: mod-t-parse
all: mod-ifelse-parse
all: mod-remember-parse
all: mod-sysv-parse
modunkn:
@echo "Expect: Unknown modifier 'Z'"
@echo "VAR:Z=${VAR:Z}"
modunknV:
@echo "Expect: Unknown modifier 'Z'"
@echo "VAR:${MOD_UNKN}=${VAR:${MOD_UNKN}}"
varterm:
@echo "Expect: Unclosed variable specification for VAR"
@echo VAR:S,V,v,=${VAR:S,V,v,
vartermV:
@echo "Expect: Unclosed variable specification for VAR"
@echo VAR:${MOD_TERM},=${VAR:${MOD_S}
modtermV:
@echo "Expect: Unfinished modifier for VAR (',' missing)"
-@echo "VAR:${MOD_TERM}=${VAR:${MOD_TERM}}"
modloop:
@echo "Expect: 2 errors about missing @ delimiter"
@echo ${UNDEF:U1 2 3:@var}
@echo ${UNDEF:U1 2 3:@var@...}
@echo ${UNDEF:U1 2 3:@var@${var}@}
# The closing brace after the ${var} is part of the replacement string.
# In ParseModifierPart, braces and parentheses don't have to be balanced.
# This is contrary to the :M, :N modifiers, where both parentheses and
# braces must be balanced.
# This is also contrary to the SysV modifier, where only the actually
# used delimiter (either braces or parentheses) must be balanced.
modloop-close:
@echo $@:
@echo ${UNDEF:U1 2 3:@var@${var}}...@
@echo ${UNDEF:U1 2 3:@var@${var}}...@}
modwords:
@echo "Expect: 2 errors about missing ] delimiter"
@echo ${UNDEF:U1 2 3:[}
@echo ${UNDEF:U1 2 3:[#}
# out of bounds => empty
@echo 13=${UNDEF:U1 2 3:[13]}
# Word index out of bounds.
#
# On LP64I32, strtol returns LONG_MAX,
# which is then truncated to int (undefined behavior),
# typically resulting in -1.
# This -1 is interpreted as "the last word".
#
# On ILP32, strtol returns LONG_MAX,
# which is a large number.
# This results in a range from LONG_MAX - 1 to 3,
# which is empty.
@echo 12345=${UNDEF:U1 2 3:[123451234512345123451234512345]:S,^$,ok,:S,^3$,ok,}
modexclam:
@echo "Expect: 2 errors about missing ! delimiter"
@echo ${VARNAME:!echo}
# When the final exclamation mark is missing, there is no
# fallback to the SysV substitution modifier.
# If there were a fallback, the output would be "exclam",
# and the above would have produced an "Unknown modifier '!'".
@echo ${!:L:!=exclam}
mod-subst-delimiter:
@echo $@:
@echo ${VAR:S
@echo ${VAR:S,
@echo ${VAR:S,from
@echo ${VAR:S,from,
@echo ${VAR:S,from,to
@echo ${VAR:S,from,to,
@echo ${VAR:S,from,to,}
@echo 1: ${VAR:S
@echo 2: ${VAR:S,
@echo 3: ${VAR:S,from
@echo ${VAR:S,from,
@echo ${VAR:S,from,to
@echo ${VAR:S,from,to,
@echo ${VAR:S,from,to,}
mod-regex-delimiter:
@echo $@:
@echo ${VAR:C
@echo ${VAR:C,
@echo ${VAR:C,from
@echo ${VAR:C,from,
@echo ${VAR:C,from,to
@echo ${VAR:C,from,to,
@echo ${VAR:C,from,to,}
@echo 1: ${VAR:C
@echo 2: ${VAR:C,
@echo 3: ${VAR:C,from
@echo ${VAR:C,from,
@echo ${VAR:C,from,to
@echo ${VAR:C,from,to,
@echo ${VAR:C,from,to,}
# In regular expressions with alternatives, not all capturing groups are
# always set; some may be missing. Warn about these.
#
# Since there is no way to turn off this warning, the combination of
# alternative matches and capturing groups is not widely used.
#
# A newly added modifier 'U' such as in :C,(a.)|(b.),\1\2,U might be added
# for treating undefined capturing groups as empty, but that would create a
# syntactical ambiguity since the :S and :C modifiers are open-ended (see
# mod-subst-chain). Luckily the modifier :U does not make sense after :C,
# therefore this case does not happen in practice.
# The sub-modifier for the :C modifier would have to be chosen wisely.
mod-regex-undefined-subexpression:
@echo $@:
@echo ${FIB:C,1(.*),one\1,} # all ok
@echo ${FIB:C,1(.*)|2(.*),(\1)+(\2),:Q} # no match for subexpression
mod-ts-parse:
@echo $@:
@echo ${FIB:ts}
@echo ${FIB:ts\65} # octal 065 == U+0035 == '5'
@echo ${FIB:ts\65oct} # bad modifier
@echo ${FIB:tsxy} # modifier too long
mod-t-parse:
@echo $@:
@echo ${FIB:t
@echo ${FIB:txy}
@echo ${FIB:t}
@echo ${FIB:t:M*}
mod-ifelse-parse:
@echo $@:
@echo ${FIB:?
@echo ${FIB:?then
@echo ${FIB:?then:
@echo ${FIB:?then:else
@echo ${FIB:?then:else}
mod-remember-parse:
@echo $@:
@echo ${FIB:_} # ok
@echo ${FIB:__} # modifier name too long
mod-sysv-parse:
@echo $@:
@echo ${FIB:3
@echo ${FIB:3=
@echo ${FIB:3=x3
@echo ${FIB:3=x3} # ok
|
