8 GetOptions("debug|D+" => \$debug
14 push @{ $debug[$i] }, $s if $debug;
18 unshift @d, "# dummy line to make line 1 index 1 in \@d\n";
20 our $i_last_l_ok = -1;
21 our $count_i_last_l_ok;
26 if ($i == $i_last_l_ok) {
27 confess $i if $count_i_last_l_ok++ > 50;
29 $count_i_last_l_ok = 0;
33 return unless $i < @d;
35 #print STDERR "L $i\n";
41 confess $i unless l_ok $i;
44 our $perlop_text = <<'END'; # c&p from man perlop
45 left terms and list operators (leftward)
49 right ! ~ \ and unary + and -
54 nonassoc named unary operators
55 nonassoc < > <= >= lt gt le ge
56 nonassoc == != <=> eq ne cmp ~~
63 right = += -= *= etc. goto last next redo dump
65 nonassoc list operators (rightward)
70 **= += *= &= &.= <<= &&=
80 foreach (split /\n/, $perlop_text) {
84 s{^(?: left | right | nonassoc ) \s+}{}x;
85 next if m{^terms and list operators};
86 next if m{^named unary};
87 next if m{^list operators};
91 foreach my $op (split /\s+/) {
92 next unless length $op;
93 next if $op =~ m{^\w+$};
98 $perlop_re = '(?: '.(join ' | ', @ops).' )';
99 $perlop_re = qr{$perlop_re}x;
100 #print STDERR "$perlop_re\n";
105 our ($ifilehead, $ifirsthunkhead);
106 our ($ihunkhead, $ihunkend);
107 our ($ichunkstart, $ichunkend);
108 our ($before, $after);
110 sub is_string ($) { $_[0]{T} =~ m/heredoc|string/; };
117 # E exact input text (does not contain here doc contents)
118 # P something to print in messages
119 # V value, only for: heredoc string
120 # Q quote characcter, only for: heredoc string
123 if (s{^[\$\@\%]?[_0-9a-zA-Z]+}{}) {
124 push @o, { T => 'ident', E => $&, P => $& };
125 } elsif (s{^\<\<(['"]?)([A-Z_]+)\1}{}) {
126 my ($q,$d) = ($1,$2);
128 push @o, { T => 'heredoc', Q => $q, Delim => $d,
129 E => $&, P => "<<$q$d$q" };
132 ( (?: (?! $d) .* \n )* )
134 }{ $1 }x or die "missing end of here doc $d\n";
136 } elsif (s{^ (["'])( (?: [^\\'"]
141 my ($q,$v) = ($1,$2);
142 push @o, { T => 'string', E => $&, P => "$q$q",
144 } elsif (s{^$perlop_re|^\;}{}) {
145 push @o, { T => 'op', E => $&, P => $& };
146 } elsif (s/[[{(]//) {
147 push @o, { T => 'bra', E => $&, P => $& };
148 } elsif (s/[]})]//) {
149 push @o, { T => 'ket', E => $&, P => $& };
150 } elsif (s/^( [\$\@\%] )( \{ )//x) {
151 push @o, { T => 'deref', E => $1, P => $1 },
152 { T => 'bra', E => $2, P => $2 };
153 } elsif (s/^ [\$\@\%] [^[^{] //x) {
154 push @o, { T => 'specvar', E => $&, P => $& };
159 die "cannot tokenise \`$&'";
162 for (my $i=@o-2; $i>0; --$i) {
163 next unless $o[$i+1]{E} eq '.';
164 my @inputs = @o[$i, $i+2];
165 next if grep { !is_string($_) } @inputs;
166 my $q = $inputs[0]{Q};
167 next if grep { $_->{Q} ne $q } @inputs;
168 my $new = { T => 'joinedstrings',
169 E => (join '.', map { $_->{E} } @inputs),
170 P => (join '.', map { $_->{P} } @inputs),
171 V => (join '', map { $_->{V} } @inputs),
174 @o = (@o[0..$i-1], $new, @o[$i+3..$#o]);
175 print STDERR Dumper(\@o);
177 debug $ichunkstart, "semiparsed: ".join ' ', map { $_->{P} } @o;
184 sub analyse_chunk_core () {
185 die "plain deletion\n" unless defined $after;
186 die "plain insertion\n" unless defined $before;
187 my @xs = semiparse $before;
188 my @ys = semiparse $after;
189 @analysed_x = @analysed_y = ();
190 my $next_something = sub {
191 my ($ary,$anal,$var,$what) = @_;
192 die "ran out of $what\n" unless @$ary;
194 push @$anal, $r->{P};
198 my $next_x = sub { $next_something->(\@xs, \@analysed_x, \$x, 'before'); };
199 my $next_y = sub { $next_something->(\@ys, \@analysed_y, \$y, 'after' ); };
200 our @y_expect_suffix = ();
202 while (my $e = shift @y_expect_suffix) {
205 or die "suffix mismatch, expected $e got $y->{E}\n";
207 last unless @xs or @ys;
210 next if $x->{E} eq $y->{E};
214 and ($ys[1]{E} eq '__' or $ys[2]{E} eq 'f_')) {
217 @y_expect_suffix = ')';
221 if ($ye eq '__' or $ye eq 'f_') {
223 die "__ on non-string $y->{P}\n" unless is_string($y);
224 die "__ on was non-string $y->{P}\n" unless is_string($x);
225 if ($y->{Q} ne "'") {
226 die "var subst in new string\n"
227 if $y->{V} =~ m{(?<!\\) [\$\@]};
230 die "__ string changed\n" unless $y->{V} eq $x->{V};
231 die "__ string quote changed\n" unless $y->{Q} eq $x->{Q};
233 $string_changed = $@;
237 die "percent $& in __ ' string\n" if m{\%};
238 die $string_changed if length $string_changed;
243 die "no percent in _f string\n" unless $fmt =~ m{\%};
244 next unless $string_changed;
245 die "f_ old string '-quoted\n" if $x->{Q} ne '"';
248 my ($lit, $what) = @_;
249 my $xl = substr($xs, 0, length($lit));
251 debug $ichunkstart, "not exactly x: ..\"$xs\"";
252 debug $ichunkstart, "not exactly y: $lit";
253 my $next = @ys ? $ys[0]{P} : '(end)';
254 die "string contents mismatch near $what before $next\n";
256 $xs = substr($xs, length($lit));
259 if ($fmt !~ m{\%[^\%]}) {
260 $exactly->($fmt, '(tail)');
264 $exactly->($`, '(literal)');
266 if ($& eq '%%') { $exactly->('%', '%%'); next; }
267 elsif ($& ne '%s') { die "unhandled %-subst $&\n"; }
269 die "expected comma, got $y->{P}\n" unless $y->{E} eq ',';
272 die "\@... => not string" unless is_string($y);
273 die "\@... => $y->{P}" if $y->{Q} ne '"';
274 $exactly->($y->{V}, $y->{P});
279 if (!$bras and !@ys) {
284 (grep { $y->{E} eq $_ } qw( or xor and not ; :
285 if unless while when )
289 # lookahead shows close of containing scope
290 # or lower precedence operator
296 $exactly->($y->{E}, $y->{P});
297 if ($y->{T} eq 'bra' or $y->{E} eq '?') {
299 } elsif ($y->{T} eq 'ket' or $y->{E} eq ':') {
300 die "too many kets at $y->{E}\n" unless $bras;
307 die "mismatch $x->{P} => $y->{P}\n";
311 sub analyse_chunk () {
313 eval { analyse_chunk_core(); };
314 return unless length $@;
315 if ($@ =~ m{^missing end of here doc (\S+)\n}) {
327 our $last_filehead = -1;
329 sub report_on_hunk () {
330 return unless @report;
331 if ($last_filehead != $ifilehead) {
332 foreach (my $i=$ifilehead; $i<$ifirsthunkhead; $i++) {
335 $last_filehead = $ifilehead;
337 my $dummy_r = { S => (scalar @d)+1, E => (scalar @d)+1 };
339 for (my $i=$ihunkhead; ; $i++) {
341 $r //= shift @report;
343 last if $i < $r->{E};
344 confess unless $r->{Done} == 03;
348 last unless $i<$ihunkend;
350 foreach my $ds (@{ $debug[$i] }) {
366 confess unless $r = $dummy_r;
369 for ($ifilehead = 0; l_ok $ifilehead; $ifilehead++) {
371 $ifirsthunkhead = $ifilehead;
372 while (l_ok $ifirsthunkhead and
373 m{^diff|^index|^---|^\Q+++\E}) {
376 $ihunkhead = $ifirsthunkhead;
377 while (l_ok $ihunkhead) {
378 m{^\@\@} or confess "$ihunkhead $_ ?";
379 my $i = $ihunkhead + 1;
381 if (!l_ok $i or m{^ } or m{^\@\@}) {
382 if (defined $ichunkstart) {
384 eval { analyse_chunk(); 1; };
386 debug $ichunkstart, "done x: @analysed_x";
387 debug $ichunkstart, "done y: @analysed_y";
388 push @report, { M => $@,
392 $ichunkstart = $ichunkend = $before = $after = undef;
397 my $which = $& eq '-' ? \$before : \$after;