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1 | |
2 | # How to generate the logic of the lookup table Perl_keyword() in toke.c |
3 | |
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4 | use Devel::Tokenizer::C 0.05; |
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5 | use strict; |
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6 | use warnings; |
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7 | |
8 | my @pos = qw(__DATA__ __END__ AUTOLOAD BEGIN CHECK DESTROY do delete defined |
9 | END else eval elsif exists for format foreach grep goto glob INIT |
10 | if last local m my map next no our pos print printf package |
11 | prototype q qr qq qw qx redo return require s scalar sort split |
12 | study sub tr tie tied use undef until untie unless while y); |
13 | |
14 | my @neg = qw(__FILE__ __LINE__ __PACKAGE__ and abs alarm atan2 accept bless |
15 | bind binmode CORE cmp chr cos chop close chdir chomp chmod chown |
16 | crypt chroot caller connect closedir continue die dump dbmopen |
17 | dbmclose eq eof err exp exit exec each endgrent endpwent |
18 | endnetent endhostent endservent endprotoent fork fcntl flock |
19 | fileno formline getppid getpgrp getpwent getpwnam getpwuid |
20 | getpeername getprotoent getpriority getprotobyname |
21 | getprotobynumber gethostbyname gethostbyaddr gethostent |
22 | getnetbyname getnetbyaddr getnetent getservbyname getservbyport |
23 | getservent getsockname getsockopt getgrent getgrnam getgrgid |
24 | getlogin getc gt ge gmtime hex int index ioctl join keys kill lt |
25 | le lc log link lock lstat length listen lcfirst localtime mkdir |
26 | msgctl msgget msgrcv msgsnd ne not or ord oct open opendir pop |
27 | push pack pipe quotemeta ref read rand recv rmdir reset rename |
28 | rindex reverse readdir readlink readline readpipe rewinddir seek |
29 | send semop select semctl semget setpgrp seekdir setpwent setgrent |
30 | setnetent setsockopt sethostent setservent setpriority |
31 | setprotoent shift shmctl shmget shmread shmwrite shutdown sin |
32 | sleep socket socketpair sprintf splice sqrt srand stat substr |
33 | system symlink syscall sysopen sysread sysseek syswrite tell time |
34 | times telldir truncate uc utime umask unpack unlink unshift |
35 | ucfirst values vec warn wait write waitpid wantarray x xor); |
36 | |
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37 | my %pos = map { ($_ => 1) } @pos; |
38 | |
39 | my $t = Devel::Tokenizer::C->new( TokenFunc => \&perl_keyword |
40 | , TokenString => 'name' |
41 | , StringLength => 'len' |
42 | , MergeSwitches => 1 |
43 | ); |
44 | |
45 | $t->add_tokens(@pos, @neg, 'elseif'); |
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46 | |
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47 | my $switch = $t->generate(Indent => ' '); |
48 | |
49 | print <<END; |
50 | /* |
51 | * The following code was generated by $0. |
52 | */ |
53 | |
54 | I32 |
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55 | Perl_keyword (pTHX_ const char *name, I32 len) |
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56 | { |
57 | $switch |
58 | unknown: |
59 | return 0; |
60 | } |
61 | END |
62 | |
63 | sub perl_keyword |
64 | { |
65 | my $k = shift; |
66 | my $sign = $pos{$k} ? '' : '-'; |
67 | |
68 | if ($k eq 'elseif') { |
69 | return <<END; |
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70 | if(ckWARN_d(WARN_SYNTAX)) |
71 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "elseif should be elsif"); |
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72 | END |
73 | } |
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74 | |
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75 | return <<END; |
76 | return ${sign}KEY_$k; |
77 | END |
78 | } |