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88e24181 CBW |
1 | #--------------------------------------------------------------------------# |
2 | # This is a modified copy of version.pm 0.9909, bundled exclusively for | |
3 | # use by ExtUtils::Makemaker and its dependencies to bootstrap when | |
4 | # version.pm is not available. It should not be used by ordinary modules. | |
5 | #--------------------------------------------------------------------------# | |
6 | ||
7 | package ExtUtils::MakeMaker::version::regex; | |
8 | ||
9 | use strict; | |
10 | ||
11 | use vars qw($VERSION $CLASS $STRICT $LAX); | |
12 | ||
9287cc84 | 13 | $VERSION = '7.30'; |
f68c5403 | 14 | $VERSION = eval $VERSION; |
88e24181 CBW |
15 | |
16 | #--------------------------------------------------------------------------# | |
17 | # Version regexp components | |
18 | #--------------------------------------------------------------------------# | |
19 | ||
20 | # Fraction part of a decimal version number. This is a common part of | |
21 | # both strict and lax decimal versions | |
22 | ||
23 | my $FRACTION_PART = qr/\.[0-9]+/; | |
24 | ||
25 | # First part of either decimal or dotted-decimal strict version number. | |
26 | # Unsigned integer with no leading zeroes (except for zero itself) to | |
27 | # avoid confusion with octal. | |
28 | ||
29 | my $STRICT_INTEGER_PART = qr/0|[1-9][0-9]*/; | |
30 | ||
31 | # First part of either decimal or dotted-decimal lax version number. | |
32 | # Unsigned integer, but allowing leading zeros. Always interpreted | |
33 | # as decimal. However, some forms of the resulting syntax give odd | |
34 | # results if used as ordinary Perl expressions, due to how perl treats | |
35 | # octals. E.g. | |
36 | # version->new("010" ) == 10 | |
37 | # version->new( 010 ) == 8 | |
38 | # version->new( 010.2) == 82 # "8" . "2" | |
39 | ||
40 | my $LAX_INTEGER_PART = qr/[0-9]+/; | |
41 | ||
42 | # Second and subsequent part of a strict dotted-decimal version number. | |
43 | # Leading zeroes are permitted, and the number is always decimal. | |
44 | # Limited to three digits to avoid overflow when converting to decimal | |
45 | # form and also avoid problematic style with excessive leading zeroes. | |
46 | ||
47 | my $STRICT_DOTTED_DECIMAL_PART = qr/\.[0-9]{1,3}/; | |
48 | ||
49 | # Second and subsequent part of a lax dotted-decimal version number. | |
50 | # Leading zeroes are permitted, and the number is always decimal. No | |
51 | # limit on the numerical value or number of digits, so there is the | |
52 | # possibility of overflow when converting to decimal form. | |
53 | ||
54 | my $LAX_DOTTED_DECIMAL_PART = qr/\.[0-9]+/; | |
55 | ||
56 | # Alpha suffix part of lax version number syntax. Acts like a | |
57 | # dotted-decimal part. | |
58 | ||
59 | my $LAX_ALPHA_PART = qr/_[0-9]+/; | |
60 | ||
61 | #--------------------------------------------------------------------------# | |
62 | # Strict version regexp definitions | |
63 | #--------------------------------------------------------------------------# | |
64 | ||
65 | # Strict decimal version number. | |
66 | ||
67 | my $STRICT_DECIMAL_VERSION = | |
68 | qr/ $STRICT_INTEGER_PART $FRACTION_PART? /x; | |
69 | ||
70 | # Strict dotted-decimal version number. Must have both leading "v" and | |
71 | # at least three parts, to avoid confusion with decimal syntax. | |
72 | ||
73 | my $STRICT_DOTTED_DECIMAL_VERSION = | |
74 | qr/ v $STRICT_INTEGER_PART $STRICT_DOTTED_DECIMAL_PART{2,} /x; | |
75 | ||
76 | # Complete strict version number syntax -- should generally be used | |
77 | # anchored: qr/ \A $STRICT \z /x | |
78 | ||
79 | $STRICT = | |
80 | qr/ $STRICT_DECIMAL_VERSION | $STRICT_DOTTED_DECIMAL_VERSION /x; | |
81 | ||
82 | #--------------------------------------------------------------------------# | |
83 | # Lax version regexp definitions | |
84 | #--------------------------------------------------------------------------# | |
85 | ||
86 | # Lax decimal version number. Just like the strict one except for | |
87 | # allowing an alpha suffix or allowing a leading or trailing | |
88 | # decimal-point | |
89 | ||
90 | my $LAX_DECIMAL_VERSION = | |
91 | qr/ $LAX_INTEGER_PART (?: \. | $FRACTION_PART $LAX_ALPHA_PART? )? | |
92 | | | |
93 | $FRACTION_PART $LAX_ALPHA_PART? | |
94 | /x; | |
95 | ||
96 | # Lax dotted-decimal version number. Distinguished by having either | |
97 | # leading "v" or at least three non-alpha parts. Alpha part is only | |
98 | # permitted if there are at least two non-alpha parts. Strangely | |
99 | # enough, without the leading "v", Perl takes .1.2 to mean v0.1.2, | |
100 | # so when there is no "v", the leading part is optional | |
101 | ||
102 | my $LAX_DOTTED_DECIMAL_VERSION = | |
103 | qr/ | |
104 | v $LAX_INTEGER_PART (?: $LAX_DOTTED_DECIMAL_PART+ $LAX_ALPHA_PART? )? | |
105 | | | |
106 | $LAX_INTEGER_PART? $LAX_DOTTED_DECIMAL_PART{2,} $LAX_ALPHA_PART? | |
107 | /x; | |
108 | ||
109 | # Complete lax version number syntax -- should generally be used | |
110 | # anchored: qr/ \A $LAX \z /x | |
111 | # | |
112 | # The string 'undef' is a special case to make for easier handling | |
113 | # of return values from ExtUtils::MM->parse_version | |
114 | ||
115 | $LAX = | |
116 | qr/ undef | $LAX_DECIMAL_VERSION | $LAX_DOTTED_DECIMAL_VERSION /x; | |
117 | ||
118 | #--------------------------------------------------------------------------# | |
119 | ||
120 | # Preloaded methods go here. | |
121 | sub is_strict { defined $_[0] && $_[0] =~ qr/ \A $STRICT \z /x } | |
122 | sub is_lax { defined $_[0] && $_[0] =~ qr/ \A $LAX \z /x } | |
123 | ||
124 | 1; |