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Perl_save_alloc can use the new(er) SSGROW rather than looping.
[perl5.git] / ext / B / t / lint.t
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1#!./perl -w
2
3BEGIN {
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4 if ($ENV{PERL_CORE}){
5 chdir('t') if -d 't';
6 @INC = ('.', '../lib');
7 } else {
8 unshift @INC, 't';
9 push @INC, "../../t";
10 }
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11 require Config;
12 if (($Config::Config{'extensions'} !~ /\bB\b/) ){
13 print "1..0 # Skip -- Perl configured without B module\n";
14 exit 0;
15 }
5638aaac 16 require 'test.pl';
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17}
18
3ee1325f 19plan tests => 18; # adjust also number of skipped tests !
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20
21# Runs a separate perl interpreter with the appropriate lint options
22# turned on
23sub runlint ($$$;$) {
24 my ($opts,$prog,$result,$testname) = @_;
25 my $res = runperl(
26 switches => [ "-MO=Lint,$opts" ],
27 prog => $prog,
28 stderr => 1,
29 );
30 $res =~ s/-e syntax OK\n$//;
31 is( $res, $result, $testname || $opts );
32}
33
34runlint 'context', '$foo = @bar', <<'RESULT';
35Implicit scalar context for array in scalar assignment at -e line 1
36RESULT
37
38runlint 'context', '$foo = length @bar', <<'RESULT';
39Implicit scalar context for array in length at -e line 1
40RESULT
41
42runlint 'implicit-read', '/foo/', <<'RESULT';
43Implicit match on $_ at -e line 1
44RESULT
45
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46runlint 'implicit-read', 'grep /foo/, ()', '';
47
48runlint 'implicit-read', 'grep { /foo/ } ()', '';
49
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50runlint 'implicit-write', 's/foo/bar/', <<'RESULT';
51Implicit substitution on $_ at -e line 1
52RESULT
53
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54{
55 my $res = runperl(
56 switches => [ "-MB::Lint" ],
ce5918c5 57 prog => 'BEGIN{B::Lint->register_plugin(X=>[q[x]])};use O(qw[Lint x]);sub X::match{warn qq[X ok.\n]};dummy()',
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58 stderr => 1,
59 );
60 like( $res, qr/X ok\./, 'Lint plugin' );
61}
62
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63SKIP : {
64
65 use Config;
40f1df11 66 skip("Doesn't work with threaded perls",11)
f5ba1307 67 if $Config{useithreads} || ($] < 5.009 && $Config{use5005threads});
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68
69 runlint 'implicit-read', '1 for @ARGV', <<'RESULT', 'implicit-read in foreach';
70Implicit use of $_ in foreach at -e line 1
71RESULT
72
73 runlint 'dollar-underscore', '$_ = 1', <<'RESULT';
74Use of $_ at -e line 1
75RESULT
76
77 runlint 'dollar-underscore', 'print', <<'RESULT', 'dollar-underscore in print';
78Use of $_ at -e line 1
79RESULT
80
81 runlint 'private-names', 'sub A::_f{};A::_f()', <<'RESULT';
82Illegal reference to private name _f at -e line 1
83RESULT
84
85 runlint 'private-names', '$A::_x', <<'RESULT';
86Illegal reference to private name _x at -e line 1
87RESULT
88
bfecbe02 89 runlint 'private-names', 'sub A::_f{};A->_f()', <<'RESULT',
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90Illegal reference to private method name _f at -e line 1
91RESULT
bfecbe02 92 'private-names (method)';
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93
94 runlint 'undefined-subs', 'foo()', <<'RESULT';
95Undefined subroutine foo called at -e line 1
96RESULT
97
98 runlint 'regexp-variables', 'print $&', <<'RESULT';
99Use of regexp variable $& at -e line 1
100RESULT
101
0091380b 102 runlint 'regexp-variables', 's/./$&/', <<'RESULT';
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103Use of regexp variable $& at -e line 1
104RESULT
94011a57 105
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106 runlint 'bare-subs', 'sub bare(){1};$x=bare', '';
107
108 runlint 'bare-subs', 'sub bare(){1}; $x=[bare=>0]; $x=$y{bare}', <<'RESULT';
109Bare sub name 'bare' interpreted as string at -e line 1
110Bare sub name 'bare' interpreted as string at -e line 1
111RESULT
112
94011a57 113}