Commit | Line | Data |
---|---|---|
d30bcfc1 NC |
1 | |
2 | # How to generate the logic of the lookup table Perl_keyword() in toke.c | |
3 | ||
35175a9c | 4 | use Devel::Tokenizer::C 0.05; |
d30bcfc1 | 5 | use strict; |
4c3bbe0f | 6 | use warnings; |
d30bcfc1 | 7 | |
0d863452 RH |
8 | my @pos = qw(__DATA__ __END__ AUTOLOAD BEGIN CHECK DESTROY default defined |
9 | delete do END else eval elsif exists for format foreach given grep | |
10 | goto glob INIT if last local m my map next no our pos print printf | |
e3e804c9 | 11 | package prototype q qr qq qw qx redo return require s say scalar sort |
3c10abe3 AG |
12 | split state study sub tr tie tied use undef UNITCHECK until untie |
13 | unless when while y); | |
d30bcfc1 NC |
14 | |
15 | my @neg = qw(__FILE__ __LINE__ __PACKAGE__ and abs alarm atan2 accept bless | |
0d863452 RH |
16 | break bind binmode CORE cmp chr cos chop close chdir chomp chmod |
17 | chown crypt chroot caller connect closedir continue die dump | |
3bf73462 | 18 | dbmopen dbmclose eq eof exp exit exec each endgrent endpwent |
0d863452 RH |
19 | endnetent endhostent endservent endprotoent fork fcntl flock fileno |
20 | formline getppid getpgrp getpwent getpwnam getpwuid getpeername | |
21 | getprotoent getpriority getprotobyname getprotobynumber | |
22 | gethostbyname gethostbyaddr gethostent getnetbyname getnetbyaddr | |
23 | getnetent getservbyname getservbyport getservent getsockname | |
24 | getsockopt getgrent getgrnam getgrgid getlogin getc gt ge gmtime | |
25 | hex int index ioctl join keys kill lt le lc log link lock lstat | |
26 | length listen lcfirst localtime mkdir msgctl msgget msgrcv msgsnd | |
27 | ne not or ord oct open opendir pop push pack pipe quotemeta ref | |
28 | read rand recv rmdir reset rename rindex reverse readdir readlink | |
e3e804c9 | 29 | readline readpipe rewinddir seek send semop select semctl semget |
0d863452 RH |
30 | setpgrp seekdir setpwent setgrent setnetent setsockopt sethostent |
31 | setservent setpriority setprotoent shift shmctl shmget shmread | |
32 | shmwrite shutdown sin sleep socket socketpair sprintf splice sqrt | |
33 | srand stat substr system symlink syscall sysopen sysread sysseek | |
34 | syswrite tell time times telldir truncate uc utime umask unpack | |
35 | unlink unshift ucfirst values vec warn wait write waitpid wantarray | |
36 | x xor); | |
37 | ||
38 | my %feature_kw = ( | |
39 | given => 'switch', | |
40 | when => 'switch', | |
41 | default => 'switch', | |
42 | # continue is already a keyword | |
43 | break => 'switch', | |
44 | ||
45 | say => 'say', | |
bc9b29db | 46 | |
712d05cf | 47 | state => 'state', |
0d863452 | 48 | ); |
d30bcfc1 | 49 | |
4c3bbe0f MHM |
50 | my %pos = map { ($_ => 1) } @pos; |
51 | ||
52 | my $t = Devel::Tokenizer::C->new( TokenFunc => \&perl_keyword | |
53 | , TokenString => 'name' | |
54 | , StringLength => 'len' | |
55 | , MergeSwitches => 1 | |
56 | ); | |
57 | ||
58 | $t->add_tokens(@pos, @neg, 'elseif'); | |
d30bcfc1 | 59 | |
4c3bbe0f MHM |
60 | my $switch = $t->generate(Indent => ' '); |
61 | ||
62 | print <<END; | |
63 | /* | |
64 | * The following code was generated by $0. | |
65 | */ | |
66 | ||
67 | I32 | |
5458a98a | 68 | Perl_keyword (pTHX_ const char *name, I32 len, bool all_keywords) |
4c3bbe0f | 69 | { |
97aff369 | 70 | dVAR; |
4c3bbe0f MHM |
71 | $switch |
72 | unknown: | |
73 | return 0; | |
74 | } | |
75 | END | |
76 | ||
77 | sub perl_keyword | |
78 | { | |
79 | my $k = shift; | |
80 | my $sign = $pos{$k} ? '' : '-'; | |
81 | ||
82 | if ($k eq 'elseif') { | |
83 | return <<END; | |
d30bcfc1 NC |
84 | if(ckWARN_d(WARN_SYNTAX)) |
85 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "elseif should be elsif"); | |
4c3bbe0f MHM |
86 | END |
87 | } | |
0d863452 | 88 | elsif (my $feature = $feature_kw{$k}) { |
0d863452 RH |
89 | $feature =~ s/([\\"])/\\$1/g; |
90 | return <<END; | |
5458a98a | 91 | return (all_keywords || FEATURE_IS_ENABLED("$feature") ? ${sign}KEY_$k : 0); |
0d863452 RH |
92 | END |
93 | } | |
4c3bbe0f MHM |
94 | return <<END; |
95 | return ${sign}KEY_$k; | |
96 | END | |
97 | } |