File: overload.pl

package info (click to toggle)
perl 5.24.1-3+deb9u5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 103,716 kB
  • sloc: perl: 559,611; ansic: 293,886; sh: 67,316; pascal: 7,632; cpp: 3,895; makefile: 2,436; xml: 2,410; yacc: 989; sed: 6; lisp: 1
file content (207 lines) | stat: -rw-r--r-- 3,816 bytes parent folder | download
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
#!/usr/bin/perl -w
#
# Regenerate (overwriting only if changed):
#
#    overload.h
#    overload.inc
#    lib/overload/numbers.pm
#
# from information stored in the DATA section of this file.
#
# This allows the order of overloading constants to be changed.
#
# Accepts the standard regen_lib -q and -v args.
#
# This script is normally invoked from regen.pl.

BEGIN {
    # Get function prototypes
    require 'regen/regen_lib.pl';
}

use strict;

my (@enums, @names);
while (<DATA>) {
  next if /^#/;
  next if /^$/;
  my ($enum, $name) = /^(\S+)\s+(\S+)/ or die "Can't parse $_";
  push @enums, $enum;
  push @names, $name;
}

my ($c, $h) = map {
    open_new($_, '>',
	     { by => 'regen/overload.pl', file => $_, style => '*',
	       copyright => [1997, 1998, 2000, 2001, 2005 .. 2007, 2011] });
} 'overload.inc', 'overload.h';

mkdir("lib/overload", 0777) unless -d 'lib/overload';
my $p = open_new('lib/overload/numbers.pm', '>',
		 { by => 'regen/overload.pl',
		   file => 'lib/overload/numbers.pm', copyright => [2008] });

{
local $" = "\n    ";
print $p <<"EOF";
package overload::numbers;

our \@names = qw#
    @names
#;

our \@enums = qw#
    @enums
#;

{ my \$i = 0; our %names = map { \$_ => \$i++ } \@names }

{ my \$i = 0; our %enums = map { \$_ => \$i++ } \@enums }
EOF
}

print $h "enum {\n";

for (0..$#enums) {
    my $op = $names[$_];
    $op = 'fallback' if $op eq '()';
    $op =~ s/^\(//;
    die if $op =~ m{\*/};
    my $l =   3 - int((length($enums[$_]) + 9) / 8);
    $l = 1 if $l < 1;
    printf $h "    %s_amg,%s/* 0x%02x %-8s */\n", $enums[$_],
	("\t" x $l), $_, $op;
}

print $h <<'EOF';
    max_amg_code
    /* Do not leave a trailing comma here.  C9X allows it, C89 doesn't. */
};

#define NofAMmeth max_amg_code
EOF

print $c <<'EOF';
#define AMG_id2name(id) (PL_AMG_names[id]+1)
#define AMG_id2namelen(id) (PL_AMG_namelens[id]-1)

static const U8 PL_AMG_namelens[NofAMmeth] = {
EOF

my $last = pop @names;

print $c map { "    " . (length $_) . ",\n" } @names;

my $lastlen = length $last;
print $c <<"EOT";
    $lastlen
};

static const char * const PL_AMG_names[NofAMmeth] = {
  /* Names kept in the symbol table.  fallback => "()", the rest has
     "(" prepended.  The only other place in perl which knows about
     this convention is AMG_id2name (used for debugging output and
     'nomethod' only), the only other place which has it hardwired is
     overload.pm.  */
EOT

for (0..$#names) {
    my $n = $names[$_];
    $n =~ s/(["\\])/\\$1/g;
    my $l =   3 - int((length($n) + 7) / 8);
    $l = 1 if $l < 1;
    printf $c "    \"%s\",%s/* %-10s */\n", $n, ("\t" x $l), $enums[$_];
}

print $c <<"EOT";
    "$last"
};
EOT

foreach ($h, $c, $p) {
    read_only_bottom_close_and_rename($_);
}
__DATA__
# Fallback should be the first
fallback	()

# These 5 are the most common in the fallback switch statement in amagic_call
to_sv		(${}
to_av		(@{}
to_hv		(%{}
to_gv		(*{}
to_cv		(&{}

# These have non-default cases in that switch statement
inc		(++
dec		(--
bool_		(bool
numer		(0+
string		(""
not		(!
copy		(=
abs		(abs
neg		(neg
iter		(<>
int		(int

# These 12 feature in the next switch statement
lt		(<
le		(<=
gt		(>
ge		(>=
eq		(==
ne		(!=
slt		(lt
sle		(le
sgt		(gt
sge		(ge
seq		(eq
sne		(ne

nomethod	(nomethod
add		(+
add_ass		(+=
subtr		(-
subtr_ass	(-=
mult		(*
mult_ass	(*=
div		(/
div_ass		(/=
modulo		(%
modulo_ass	(%=
pow		(**
pow_ass		(**=
lshift		(<<
lshift_ass	(<<=
rshift		(>>
rshift_ass	(>>=
band		(&
band_ass	(&=
sband		(&.
sband_ass	(&.=
bor		(|
bor_ass		(|=
sbor		(|.
sbor_ass	(|.=
bxor		(^
bxor_ass	(^=
sbxor		(^.
sbxor_ass	(^.=
ncmp		(<=>
scmp		(cmp
compl		(~
scompl		(~.
atan2		(atan2
cos		(cos
sin		(sin
exp		(exp
log		(log
sqrt		(sqrt
repeat		(x
repeat_ass	(x=
concat		(.
concat_ass	(.=
smart		(~~
ftest           (-X
regexp          (qr