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
7package ExtUtils::MakeMaker::version::regex;
8
9use strict;
10use warnings;
11
12use vars qw($VERSION $CLASS $STRICT $LAX);
13
14$VERSION = '7.64';
15$VERSION =~ tr/_//d;
16
17#--------------------------------------------------------------------------#
18# Version regexp components
19#--------------------------------------------------------------------------#
20
21# Fraction part of a decimal version number.  This is a common part of
22# both strict and lax decimal versions
23
24my $FRACTION_PART = qr/\.[0-9]+/;
25
26# First part of either decimal or dotted-decimal strict version number.
27# Unsigned integer with no leading zeroes (except for zero itself) to
28# avoid confusion with octal.
29
30my $STRICT_INTEGER_PART = qr/0|[1-9][0-9]*/;
31
32# First part of either decimal or dotted-decimal lax version number.
33# Unsigned integer, but allowing leading zeros.  Always interpreted
34# as decimal.  However, some forms of the resulting syntax give odd
35# results if used as ordinary Perl expressions, due to how perl treats
36# octals.  E.g.
37#   version->new("010" ) == 10
38#   version->new( 010  ) == 8
39#   version->new( 010.2) == 82  # "8" . "2"
40
41my $LAX_INTEGER_PART = qr/[0-9]+/;
42
43# Second and subsequent part of a strict dotted-decimal version number.
44# Leading zeroes are permitted, and the number is always decimal.
45# Limited to three digits to avoid overflow when converting to decimal
46# form and also avoid problematic style with excessive leading zeroes.
47
48my $STRICT_DOTTED_DECIMAL_PART = qr/\.[0-9]{1,3}/;
49
50# Second and subsequent part of a lax dotted-decimal version number.
51# Leading zeroes are permitted, and the number is always decimal.  No
52# limit on the numerical value or number of digits, so there is the
53# possibility of overflow when converting to decimal form.
54
55my $LAX_DOTTED_DECIMAL_PART = qr/\.[0-9]+/;
56
57# Alpha suffix part of lax version number syntax.  Acts like a
58# dotted-decimal part.
59
60my $LAX_ALPHA_PART = qr/_[0-9]+/;
61
62#--------------------------------------------------------------------------#
63# Strict version regexp definitions
64#--------------------------------------------------------------------------#
65
66# Strict decimal version number.
67
68my $STRICT_DECIMAL_VERSION =
69    qr/ $STRICT_INTEGER_PART $FRACTION_PART? /x;
70
71# Strict dotted-decimal version number.  Must have both leading "v" and
72# at least three parts, to avoid confusion with decimal syntax.
73
74my $STRICT_DOTTED_DECIMAL_VERSION =
75    qr/ v $STRICT_INTEGER_PART $STRICT_DOTTED_DECIMAL_PART{2,} /x;
76
77# Complete strict version number syntax -- should generally be used
78# anchored: qr/ \A $STRICT \z /x
79
80$STRICT =
81    qr/ $STRICT_DECIMAL_VERSION | $STRICT_DOTTED_DECIMAL_VERSION /x;
82
83#--------------------------------------------------------------------------#
84# Lax version regexp definitions
85#--------------------------------------------------------------------------#
86
87# Lax decimal version number.  Just like the strict one except for
88# allowing an alpha suffix or allowing a leading or trailing
89# decimal-point
90
91my $LAX_DECIMAL_VERSION =
92    qr/ $LAX_INTEGER_PART (?: \. | $FRACTION_PART $LAX_ALPHA_PART? )?
93	|
94	$FRACTION_PART $LAX_ALPHA_PART?
95    /x;
96
97# Lax dotted-decimal version number.  Distinguished by having either
98# leading "v" or at least three non-alpha parts.  Alpha part is only
99# permitted if there are at least two non-alpha parts. Strangely
100# enough, without the leading "v", Perl takes .1.2 to mean v0.1.2,
101# so when there is no "v", the leading part is optional
102
103my $LAX_DOTTED_DECIMAL_VERSION =
104    qr/
105	v $LAX_INTEGER_PART (?: $LAX_DOTTED_DECIMAL_PART+ $LAX_ALPHA_PART? )?
106	|
107	$LAX_INTEGER_PART? $LAX_DOTTED_DECIMAL_PART{2,} $LAX_ALPHA_PART?
108    /x;
109
110# Complete lax version number syntax -- should generally be used
111# anchored: qr/ \A $LAX \z /x
112#
113# The string 'undef' is a special case to make for easier handling
114# of return values from ExtUtils::MM->parse_version
115
116$LAX =
117    qr/ undef | $LAX_DECIMAL_VERSION | $LAX_DOTTED_DECIMAL_VERSION /x;
118
119#--------------------------------------------------------------------------#
120
121# Preloaded methods go here.
122sub is_strict	{ defined $_[0] && $_[0] =~ qr/ \A $STRICT \z /x }
123sub is_lax	{ defined $_[0] && $_[0] =~ qr/ \A $LAX \z /x }
124
1251;
126