regcomp.c: Change warning category to just deprecated

[perl5.git] / t / re / reg_mesg.t

#!./perl -w

BEGIN {
	chdir 't' if -d 't';
	@INC = '../lib';
	require './test.pl';
	eval 'require Config'; # assume defaults if this fails
}

use strict;

##
## If the markers used are changed (search for "MARKER1" in regcomp.c),
## update only these two regexs, and leave the {#} in the @death/@warning
## arrays below. The {#} is a meta-marker -- it marks where the marker should
## go.
##
## Returns empty string if that is what is expected.  Otherwise, handles
## either a scalar, turning it into a single element array; or a ref to an
## array, adjusting each element.  If called in array context, returns an
## array, otherwise the join of all elements

sub fixup_expect {
    my $expect_ref = shift;
    return if $expect_ref eq "";

    my @expect;
    if (ref $expect_ref) {
        @expect = @$expect_ref;
    }
    else {
        @expect = $expect_ref;
    }

    foreach my $element (@expect) {
        $element =~ s/{\#}/<-- HERE/;
        $element =~ s/{\#}/ <-- HERE /;
        $element .= " at ";
    }
    return wantarray ? @expect : join "", @expect;
}

my $inf_m1 = ($Config::Config{reg_infty} || 32767) - 1;
my $inf_p1 = $inf_m1 + 2;

##
## Key-value pairs of code/error of code that should have fatal errors.
##
my @death =
(
 '/[[=foo=]]/' => 'POSIX syntax [= =] is reserved for future extensions in regex; marked by {#} in m/[[=foo=]{#}]/',

 '/(?<= .*)/' =>  'Variable length lookbehind not implemented in regex m/(?<= .*)/',

 '/(?<= x{1000})/' => 'Lookbehind longer than 255 not implemented in regex m/(?<= x{1000})/',

 '/(?@)/' => 'Sequence (?@...) not implemented in regex; marked by {#} in m/(?@{#})/',

 '/(?{ 1/' => 'Missing right curly or square bracket',

 '/(?(1x))/' => 'Switch condition not recognized in regex; marked by {#} in m/(?(1x{#}))/',

 '/(?(1)x|y|z)/' => 'Switch (?(condition)... contains too many branches in regex; marked by {#} in m/(?(1)x|y|{#}z)/',

 '/(?(x)y|x)/' => 'Unknown switch condition (?(x) in regex; marked by {#} in m/(?({#}x)y|x)/',

 '/(?/' => 'Sequence (? incomplete in regex; marked by {#} in m/(?{#}/',

 '/(?;x/' => 'Sequence (?;...) not recognized in regex; marked by {#} in m/(?;{#}x/',
 '/(?<;x/' => 'Group name must start with a non-digit word character in regex; marked by {#} in m/(?<;{#}x/',
 '/(?\ix/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}ix/',
 '/(?\mx/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}mx/',
 '/(?\:x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}:x/',
 '/(?\=x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}=x/',
 '/(?\!x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}!x/',
 '/(?\<=x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}<=x/',
 '/(?\<!x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}<!x/',
 '/(?\>x/' => 'Sequence (?\...) not recognized in regex; marked by {#} in m/(?\{#}>x/',
 '/(?^-i:foo)/' => 'Sequence (?^-...) not recognized in regex; marked by {#} in m/(?^-{#}i:foo)/',
 '/(?^-i)foo/' => 'Sequence (?^-...) not recognized in regex; marked by {#} in m/(?^-{#}i)foo/',
 '/(?^d:foo)/' => 'Sequence (?^d...) not recognized in regex; marked by {#} in m/(?^d{#}:foo)/',
 '/(?^d)foo/' => 'Sequence (?^d...) not recognized in regex; marked by {#} in m/(?^d{#})foo/',
 '/(?^lu:foo)/' => 'Regexp modifiers "l" and "u" are mutually exclusive in regex; marked by {#} in m/(?^lu{#}:foo)/',
 '/(?^lu)foo/' => 'Regexp modifiers "l" and "u" are mutually exclusive in regex; marked by {#} in m/(?^lu{#})foo/',
'/(?da:foo)/' => 'Regexp modifiers "d" and "a" are mutually exclusive in regex; marked by {#} in m/(?da{#}:foo)/',
'/(?lil:foo)/' => 'Regexp modifier "l" may not appear twice in regex; marked by {#} in m/(?lil{#}:foo)/',
'/(?aaia:foo)/' => 'Regexp modifier "a" may appear a maximum of twice in regex; marked by {#} in m/(?aaia{#}:foo)/',
'/(?i-l:foo)/' => 'Regexp modifier "l" may not appear after the "-" in regex; marked by {#} in m/(?i-l{#}:foo)/',

 '/((x)/' => 'Unmatched ( in regex; marked by {#} in m/({#}(x)/',

 "/x{$inf_p1}/" => "Quantifier in {,} bigger than $inf_m1 in regex; marked by {#} in m/x{{#}$inf_p1}/",


 '/x**/' => 'Nested quantifiers in regex; marked by {#} in m/x**{#}/',

 '/x[/' => 'Unmatched [ in regex; marked by {#} in m/x[{#}/',

 '/*/', => 'Quantifier follows nothing in regex; marked by {#} in m/*{#}/',

 '/\p{x/' => 'Missing right brace on \p{} in regex; marked by {#} in m/\p{{#}x/',

 '/[\p{x]/' => 'Missing right brace on \p{} in regex; marked by {#} in m/[\p{{#}x]/',

 '/(x)\2/' => 'Reference to nonexistent group in regex; marked by {#} in m/(x)\2{#}/',

 'my $m = "\\\"; $m =~ $m', => 'Trailing \ in regex m/\/',

 '/\x{1/' => 'Missing right brace on \x{} in regex; marked by {#} in m/\x{1{#}/',
 '/\x{X/' => 'Missing right brace on \x{} in regex; marked by {#} in m/\x{{#}X/',

 '/[\x{X]/' => 'Missing right brace on \x{} in regex; marked by {#} in m/[\x{{#}X]/',
 '/[\x{A]/' => 'Missing right brace on \x{} in regex; marked by {#} in m/[\x{A{#}]/',

 '/\o{1/' => 'Missing right brace on \o{ in regex; marked by {#} in m/\o{1{#}/',
 '/\o{X/' => 'Missing right brace on \o{ in regex; marked by {#} in m/\o{{#}X/',

 '/[\o{X]/' => 'Missing right brace on \o{ in regex; marked by {#} in m/[\o{{#}X]/',
 '/[\o{7]/' => 'Missing right brace on \o{ in regex; marked by {#} in m/[\o{7{#}]/',

 '/[[:barf:]]/' => 'POSIX class [:barf:] unknown in regex; marked by {#} in m/[[:barf:]{#}]/',

 '/[[=barf=]]/' => 'POSIX syntax [= =] is reserved for future extensions in regex; marked by {#} in m/[[=barf=]{#}]/',

 '/[[.barf.]]/' => 'POSIX syntax [. .] is reserved for future extensions in regex; marked by {#} in m/[[.barf.]{#}]/',

 '/[z-a]/' => 'Invalid [] range "z-a" in regex; marked by {#} in m/[z-a{#}]/',

 '/\p/' => 'Empty \p{} in regex; marked by {#} in m/\p{#}/',

 '/\P{}/' => 'Empty \P{} in regex; marked by {#} in m/\P{{#}}/',
 '/(?[[[:word]]])/' => "Unmatched ':' in POSIX class in regex; marked by {#} in m/(?[[[:word{#}]]])/",
 '/(?[[:word]])/' => "Unmatched ':' in POSIX class in regex; marked by {#} in m/(?[[:word{#}]])/",
 '/(?[[[:digit: ])/' => "Unmatched '[' in POSIX class in regex; marked by {#} in m/(?[[[:digit:{#} ])/",
 '/(?[[:digit: ])/' => "Unmatched '[' in POSIX class in regex; marked by {#} in m/(?[[:digit:{#} ])/",
 '/(?[[[::]]])/' => "POSIX class [::] unknown in regex; marked by {#} in m/(?[[[::]{#}]])/",
 '/(?[[[:w:]]])/' => "POSIX class [:w:] unknown in regex; marked by {#} in m/(?[[[:w:]{#}]])/",
 '/(?[[:w:]])/' => "POSIX class [:w:] unknown in regex; marked by {#} in m/(?[[:w:]{#}])/",
 '/(?[a])/' =>  'Unexpected character in regex; marked by {#} in m/(?[a{#}])/',
 '/(?[\t])/l' => '(?[...]) not valid in locale in regex; marked by {#} in m/(?[{#}\t])/',
 '/(?[ + \t ])/' => 'Unexpected binary operator \'+\' with no preceding operand in regex; marked by {#} in m/(?[ +{#} \t ])/',
 '/(?[ \cK - ( + \t ) ])/' => 'Unexpected binary operator \'+\' with no preceding operand in regex; marked by {#} in m/(?[ \cK - ( +{#} \t ) ])/',
 '/(?[ \cK ( \t ) ])/' => 'Unexpected \'(\' with no preceding operator in regex; marked by {#} in m/(?[ \cK ({#} \t ) ])/',
 '/(?[ \cK \t ])/' => 'Operand with no preceding operator in regex; marked by {#} in m/(?[ \cK \t{#} ])/',
 '/(?[ \0004 ])/' => 'Need exactly 3 octal digits in regex; marked by {#} in m/(?[ \0004 {#}])/',
 '/(?[ \05 ])/' => 'Need exactly 3 octal digits in regex; marked by {#} in m/(?[ \05 {#}])/',
 '/(?[ \o{1038} ])/' => 'Non-octal character in regex; marked by {#} in m/(?[ \o{1038{#}} ])/',
 '/(?[ \o{} ])/' => 'Number with no digits in regex; marked by {#} in m/(?[ \o{}{#} ])/',
 '/(?[ \x{defg} ])/' => 'Non-hex character in regex; marked by {#} in m/(?[ \x{defg{#}} ])/',
 '/(?[ \xabcdef ])/' => 'Use \\x{...} for more than two hex characters in regex; marked by {#} in m/(?[ \xabc{#}def ])/',
 '/(?[ \x{} ])/' => 'Number with no digits in regex; marked by {#} in m/(?[ \x{}{#} ])/',
 '/(?[ \cK + ) ])/' => 'Unexpected \')\' in regex; marked by {#} in m/(?[ \cK + ){#} ])/',
 '/(?[ \cK + ])/' => 'Incomplete expression within \'(?[ ])\' in regex; marked by {#} in m/(?[ \cK + {#}])/',
 '/(?[ \p{foo} ])/' => 'Property \'foo\' is unknown in regex; marked by {#} in m/(?[ \p{foo}{#} ])/',
 '/(?[ \p{ foo = bar } ])/' => 'Property \'foo = bar\' is unknown in regex; marked by {#} in m/(?[ \p{ foo = bar }{#} ])/',
 '/(?[ \8 ])/' => 'Unrecognized escape \8 in character class in regex; marked by {#} in m/(?[ \8{#} ])/',
 '/(?[ \t ]/' => 'Syntax error in (?[...]) in regex m/(?[ \t ]/',
 '/(?[ [ \t ]/' => 'Syntax error in (?[...]) in regex m/(?[ [ \t ]/',
 '/(?[ \t ] ]/' => 'Syntax error in (?[...]) in regex m/(?[ \t ] ]/',
 '/(?[ [ ] ]/' => 'Syntax error in (?[...]) in regex m/(?[ [ ] ]/',
 '/(?[ \t + \e # This was supposed to be a comment ])/' => 'Syntax error in (?[...]) in regex m/(?[ \t + \e # This was supposed to be a comment ])/',
 '/(?[ ])/' => 'Incomplete expression within \'(?[ ])\' in regex; marked by {#} in m/(?[ {#}])/',
 'm/(?[[a-\d]])/' => 'False [] range "a-\d" in regex; marked by {#} in m/(?[[a-\d{#}]])/',
 'm/(?[[\w-x]])/' => 'False [] range "\w-" in regex; marked by {#} in m/(?[[\w-{#}x]])/',
 'm/(?[[a-\pM]])/' => 'False [] range "a-\pM" in regex; marked by {#} in m/(?[[a-\pM{#}]])/',
 'm/(?[[\pM-x]])/' => 'False [] range "\pM-" in regex; marked by {#} in m/(?[[\pM-{#}x]])/',
 'm/(?[[\N{LATIN CAPITAL LETTER A WITH MACRON AND GRAVE}]])/' => '\N{} in character class restricted to one character in regex; marked by {#} in m/(?[[\N{U+100.300{#}}]])/',
);
# Tests involving a user-defined charnames translator are in pat_advanced.t

# In the following arrays of warnings, the value can be an array of things to
# expect.  If the empty string, it means no warning should be raised.

##
## Key-value pairs of code/error of code that should have non-fatal regexp warnings.
##
my @warning = (
    'm/\b*/' => '\b* matches null string many times in regex; marked by {#} in m/\b*{#}/',

    'm/[:blank:]/' => 'POSIX syntax [: :] belongs inside character classes in regex; marked by {#} in m/[:blank:]{#}/',

    "m'[\\y]'"     => 'Unrecognized escape \y in character class passed through in regex; marked by {#} in m/[\y{#}]/',

    'm/[a-\d]/' => 'False [] range "a-\d" in regex; marked by {#} in m/[a-\d{#}]/',
    'm/[\w-x]/' => 'False [] range "\w-" in regex; marked by {#} in m/[\w-{#}x]/',
    'm/[a-\pM]/' => 'False [] range "a-\pM" in regex; marked by {#} in m/[a-\pM{#}]/',
    'm/[\pM-x]/' => 'False [] range "\pM-" in regex; marked by {#} in m/[\pM-{#}x]/',
    "m'\\y'"     => 'Unrecognized escape \y passed through in regex; marked by {#} in m/\y{#}/',
    '/x{3,1}/'   => 'Quantifier {n,m} with n > m can\'t match in regex; marked by {#} in m/x{3,1}{#}/',
    '/\08/' => '\'\08\' resolved to \'\o{0}8\' in regex; marked by {#} in m/\08{#}/',
    '/\018/' => '\'\018\' resolved to \'\o{1}8\' in regex; marked by {#} in m/\018{#}/',
    '/[\08]/' => '\'\08\' resolved to \'\o{0}8\' in regex; marked by {#} in m/[\08{#}]/',
    '/[\018]/' => '\'\018\' resolved to \'\o{1}8\' in regex; marked by {#} in m/[\018{#}]/',
);

my @experimental_regex_sets = (
    '/(?[ \t ])/' => 'The regex_sets feature is experimental in regex; marked by {#} in m/(?[{#} \t ])/',
);

while (my ($regex, $expect) = splice @death, 0, 2) {
    my $expect = fixup_expect($expect);
    no warnings 'experimental::regex_sets';
    # skip the utf8 test on EBCDIC since they do not die
    next if $::IS_EBCDIC && $regex =~ /utf8/;

    warning_is(sub {
		   $_ = "x";
		   eval $regex;
		   like($@, qr/\Q$expect/, $regex);
	       }, undef, "... and died without any other warnings");
}

foreach my $ref (\@warning, \@experimental_regex_sets) {
    my $warning_type = ($ref == \@warning)
                       ? 'regexp'
                       : 'experimental::regex_sets';
    while (my ($regex, $expect) = splice @$ref, 0, 2) {
        my @expect = fixup_expect($expect);
        {
            $_ = "x";
            no warnings;
            eval $regex;
        }
        if (is($@, "", "$regex did not die")) {
            my @got = capture_warnings(sub {
                                    $_ = "x";
                                    eval $regex });
            my $count = @expect;
            if (! is(scalar @got, scalar @expect, "... and gave expected number ($count) of warnings")) {
                if (@got < @expect) {
                    $count = @got;
                    note "Expected warnings not gotten:\n\t" . join "\n\t", @expect[$count .. $#expect];
                }
                else {
                    note "Unexpected warnings gotten:\n\t" . join("\n\t", @got[$count .. $#got]);
                }
            }
            foreach my $i (0 .. $count - 1) {
                if (like($got[$i], qr/\Q$expect[$i]/, "... and gave expected warning[$i]")) {
                    ok (0 == capture_warnings(sub {
                                    $_ = "x";
                                    eval "no warnings '$warning_type'; $regex;" }
                                ),
                    "... and turning off '$warning_type' warnings suppressed it");
                }
            }
        }
    }
}

done_testing();