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;
10
11use vars qw($VERSION $CLASS $STRICT $LAX);
12
13$VERSION = '7.34';
14$VERSION = eval $VERSION;
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
23my $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
29my $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
40my $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
47my $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
54my $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
59my $LAX_ALPHA_PART = qr/_[0-9]+/;
60
61#--------------------------------------------------------------------------#
62# Strict version regexp definitions
63#--------------------------------------------------------------------------#
64
65# Strict decimal version number.
66
67my $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
73my $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
90my $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
102my $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.
121sub is_strict	{ defined $_[0] && $_[0] =~ qr/ \A $STRICT \z /x }
122sub is_lax	{ defined $_[0] && $_[0] =~ qr/ \A $LAX \z /x }
123
1241;
125