1 # $NetBSD: varmod-to-separator.mk,v 1.3 2020/08/31 19:58:21 rillig Exp $
3 # Tests for the :ts variable modifier, which joins the words of the variable
4 # using an arbitrary character as word separator.
6 WORDS= one two three four five six
8 # The words are separated by a single space, just as usual.
9 .if ${WORDS:ts } != "one two three four five six"
10 . warning Space as separator does not work.
13 # The separator can be an arbitrary character, for example a comma.
14 .if ${WORDS:ts,} != "one,two,three,four,five,six"
15 . warning Comma as separator does not work.
18 # After the :ts modifier, other modifiers can follow.
19 .if ${WORDS:ts/:tu} != "ONE/TWO/THREE/FOUR/FIVE/SIX"
20 . warning Chaining modifiers does not work.
23 # To use the ':' as the separator, just write it normally.
24 # The first colon is the separator, the second ends the modifier.
25 .if ${WORDS:ts::tu} != "ONE:TWO:THREE:FOUR:FIVE:SIX"
26 . warning Colon as separator does not work.
29 # When there is just a colon but no other character, the words are
30 # "separated" by an empty string, that is, they are all squashed
32 .if ${WORDS:ts:tu} != "ONETWOTHREEFOURFIVESIX"
33 . warning Colon as separator does not work.
36 # Applying the :tu modifier first and then the :ts modifier does not change
37 # anything since neither of these modifiers is related to how the string is
38 # split into words. Beware of separating the words using a single or double
39 # quote though, or other special characters like dollar or backslash.
41 # This example also demonstrates that the closing brace is not interpreted
42 # as a separator, but as the closing delimiter of the whole variable
44 .if ${WORDS:tu:ts} != "ONETWOTHREEFOURFIVESIX"
45 . warning Colon as separator does not work.
48 # The '}' plays the same role as the ':' in the preceding examples.
49 # Since there is a single character before it, that character is taken as
51 .if ${WORDS:tu:ts/} != "ONE/TWO/THREE/FOUR/FIVE/SIX"
52 . warning Colon as separator does not work.
55 # Now it gets interesting and ambiguous: The separator could either be empty
56 # since it is followed by a colon. Or it could be the colon since that
57 # colon is followed by the closing brace. It's the latter case.
58 .if ${WORDS:ts:} != "one:two:three:four:five:six"
59 . warning Colon followed by closing brace does not work.
62 # As in the ${WORDS:tu:ts} example above, the separator is empty.
63 .if ${WORDS:ts} != "onetwothreefourfivesix"
64 . warning Empty separator before closing brace does not work.
67 # The :ts modifier can be followed by other modifiers.
68 .if ${WORDS:ts:S/two/2/} != "one2threefourfivesix"
69 . warning Separator followed by :S modifier does not work.
72 # The :ts modifier can follow other modifiers.
73 .if ${WORDS:S/two/2/:ts} != "one2threefourfivesix"
74 . warning :S modifier followed by :ts modifier does not work.
77 # The :ts modifier with an actual separator can be followed by other
79 .if ${WORDS:ts/:S/two/2/} != "one/2/three/four/five/six"
80 . warning The :ts modifier followed by an :S modifier does not work.
83 # The separator can be \n, which is a newline.
84 .if ${WORDS:[1..3]:ts\n} != "one${.newline}two${.newline}three"
85 . warning The separator \n does not produce a newline.
88 # The separator can be \t, which is a tab.
89 .if ${WORDS:[1..3]:ts\t} != "one two three"
90 . warning The separator \t does not produce a tab.
93 # The separator can be given as octal number.
94 .if ${WORDS:[1..3]:ts\012:tu} != "ONE${.newline}TWO${.newline}THREE"
95 . warning The separator \012 is not interpreted in octal ASCII.
98 # The separator can be given as hexadecimal number.
99 .if ${WORDS:[1..3]:ts\xa:tu} != "ONE${.newline}TWO${.newline}THREE"
100 . warning The separator \xa is not interpreted in hexadecimal ASCII.
103 # In the :t modifier, the :t must be followed by any of A, l, s, u.
104 .if ${WORDS:tx} != "anything"
105 . info This line is not reached because of the malformed condition.
106 . info If this line were reached, it would be visible in the -dcpv log.
108 .info Parsing continues here.
110 # After the backslash, only n, t, an octal number, or x and a hexadecimal
111 # number are allowed.
112 .if ${WORDS:t\X} != "anything"
113 . info This line is not reached.
115 .info Parsing continues here.