#!./perl -w
# Check that lines from eval are correctly retained by the debugger
# Uncomment this for testing, but don't leave it in for "production", as
# we've not yet verified that use works.
# use strict;
print "1..75\n";
my $test = 0;
sub failed {
    my ($got, $expected, $name) = @_;
    print "not ok $test - $name\n";
    my @caller = caller(1);
    print "# Failed test at $caller[1] line $caller[2]\n";
    if (defined $got) {
        print "# Got '$got'\n";
    } else {
        print "# Got undef\n";
    }
    print "# Expected $expected\n";
    return;
}
sub is($$$) {
    my ($got, $expect, $name) = @_;
    $test = $test + 1;
    if (defined $expect) {
        if (defined $got && $got eq $expect) {
            print "ok $test - $name\n";
            return 1;
        }
        failed($got, "'$expect'", $name);
    } else {
        if (!defined $got) {
            print "ok $test - $name\n";
            return 1;
        }
        failed($got, 'undef', $name);
    }
}
$^P = 0xA;
my @before = grep { /eval/ } keys %::;
is ((scalar @before), 0, "No evals");
my %seen;
sub check_retained_lines {
    my ($prog, $name) = @_;
    # Is there a more efficient way to write this?
    my @expect_lines = (undef, map ({"$_\n"} split "\n", $prog), "\n", ';');
    my @keys = grep {!$seen{$_}} grep { /eval/ } keys %::;
    is ((scalar @keys), 1, "1 new eval");
    my @got_lines = @{$::{$keys[0]}};
    is ((scalar @got_lines),
        (scalar @expect_lines), "Right number of lines for $name");
    for (0..$#expect_lines) {
        is ($got_lines[$_], $expect_lines[$_], "Line $_ is correct");
    }
    $seen{$keys[0]}++;
}
my $name = 'foo';
for my $sep (' ', "\0") {
    my $prog = "sub $name {
    'Perl${sep}Rules'
};
1;
";
    eval $prog or die;
    check_retained_lines($prog, ord $sep);
    $name++;
}
{
  # This contains a syntax error
  my $prog = "sub $name {
    'This is $name'
  }
1 +
";
  eval $prog and die;
  is (eval "$name()", "This is $name", "Subroutine was compiled, despite error")
    or print STDERR "# $@\n";
  check_retained_lines($prog,
                       'eval that defines subroutine but has syntax error');
  $name++;
}
foreach my $flags (0x0, 0x800, 0x1000, 0x1800) {
    local $^P = $^P | $flags;
    # This is easier if we accept that the guts eval will add a trailing \n
    # for us
    my $prog = "1 + 1 + 1\n";
    my $fail = "1 + \n";
    is (eval $prog, 3, 'String eval works');
    if ($flags & 0x800) {
        check_retained_lines($prog, sprintf "%#X", $^P);
    } else {
        my @after = grep { /eval/ } keys %::;
        is (scalar @after, 0 + keys %seen,
            "evals that don't define subroutines are correctly cleaned up");
    }
    is (eval $fail, undef, 'Failed string eval fails');
    if ($flags & 0x1000) {
        check_retained_lines($fail, sprintf "%#X", $^P);
    } else {
        my @after = grep { /eval/ } keys %::;
        is (scalar @after, 0 + keys %seen,
            "evals that fail are correctly cleaned up");
    }
}
# BEGIN blocks that die
for (0xA, 0) {
  local $^P = $_;
  eval (my $prog = "BEGIN{die}\n");
  if ($_) {
    check_retained_lines($prog, 'eval that defines BEGIN that dies');
  }
  else {
    my @after = grep { /eval/ } keys %::;
    is (scalar @after, 0 + keys %seen,
       "evals with BEGIN{die} are correctly cleaned up");
  }
}
# [perl #79442] A #line "foo" directive in a string eval was not updating
# *{"_<foo"} in threaded perls, and was not putting the right lines into
# the right elements of @{"_<foo"} in non-threaded perls.
{
  local $^P = 0x400|0x100|0x10;
  eval qq{#line 42 "hash-line-eval"\n labadalabada()\n};
  is $::{"_<hash-line-eval"}[42], " labadalabada()\n",
   '#line 42 "foo" in a string eval updates @{"_<foo"}';
  eval qq{#line 42 "figgle"\n#line 85 "doggo"\n labadalabada()\n};
  is $::{"_<doggo"}[85], " labadalabada()\n",
   'subsequent #line 42 "foo" in a string eval updates @{"_<foo"}';
}
# Modifying ${"_<foo"} should not stop lines from being retained.
{
  local $^P = 0x400|0x100|0x10;
  eval <<'end';
#line 42 "copfilesv-modification"
    BEGIN{ ${"_<copfilesv-modification"} = \1 }
#line 52 "copfilesv-modified"
    abcdefg();
end
  is $::{"_<copfilesv-modified"}[52], "    abcdefg();\n",
   '#line 42 "foo" in a str eval is not confused by ${"_<foo"} changing';
}