| 1 |
=head1 NAME |
| 2 |
|
| 3 |
JSON::XS - JSON serialising/deserialising, done correctly and fast |
| 4 |
|
| 5 |
=head1 SYNOPSIS |
| 6 |
|
| 7 |
use JSON::XS; |
| 8 |
|
| 9 |
=head1 DESCRIPTION |
| 10 |
|
| 11 |
This module converts Perl data structures to JSON and vice versa. Its |
| 12 |
primary goal is to be I<correct> and its secondary goal is to be |
| 13 |
I<fast>. To reach the latter goal it was written in C. |
| 14 |
|
| 15 |
As this is the n-th-something JSON module on CPAN, what was the reason |
| 16 |
to write yet another JSON module? While it seems there are many JSON |
| 17 |
modules, none of them correctly handle all corner cases, and in most cases |
| 18 |
their maintainers are unresponsive, gone missing, or not listening to bug |
| 19 |
reports for other reasons. |
| 20 |
|
| 21 |
See COMPARISON, below, for a comparison to some other JSON modules. |
| 22 |
|
| 23 |
See MAPPING, below, on how JSON::XS maps perl values to JSON values and |
| 24 |
vice versa. |
| 25 |
|
| 26 |
=head2 FEATURES |
| 27 |
|
| 28 |
=over 4 |
| 29 |
|
| 30 |
=item * correct handling of unicode issues |
| 31 |
|
| 32 |
This module knows how to handle Unicode, and even documents how and when |
| 33 |
it does so. |
| 34 |
|
| 35 |
=item * round-trip integrity |
| 36 |
|
| 37 |
When you serialise a perl data structure using only datatypes supported |
| 38 |
by JSON, the deserialised data structure is identical on the Perl level. |
| 39 |
(e.g. the string "2.0" doesn't suddenly become "2"). |
| 40 |
|
| 41 |
=item * strict checking of JSON correctness |
| 42 |
|
| 43 |
There is no guessing, no generating of illegal JSON strings by default, |
| 44 |
and only JSON is accepted as input by default (the latter is a security |
| 45 |
feature). |
| 46 |
|
| 47 |
=item * fast |
| 48 |
|
| 49 |
Compared to other JSON modules, this module compares favourably in terms |
| 50 |
of speed, too. |
| 51 |
|
| 52 |
=item * simple to use |
| 53 |
|
| 54 |
This module has both a simple functional interface as well as an OO |
| 55 |
interface. |
| 56 |
|
| 57 |
=item * reasonably versatile output formats |
| 58 |
|
| 59 |
You can choose between the most compact guarenteed single-line format |
| 60 |
possible (nice for simple line-based protocols), a pure-ascii format (for |
| 61 |
when your transport is not 8-bit clean), or a pretty-printed format (for |
| 62 |
when you want to read that stuff). Or you can combine those features in |
| 63 |
whatever way you like. |
| 64 |
|
| 65 |
=back |
| 66 |
|
| 67 |
=cut |
| 68 |
|
| 69 |
package JSON::XS; |
| 70 |
|
| 71 |
BEGIN { |
| 72 |
$VERSION = '0.3'; |
| 73 |
@ISA = qw(Exporter); |
| 74 |
|
| 75 |
@EXPORT = qw(to_json from_json); |
| 76 |
require Exporter; |
| 77 |
|
| 78 |
require XSLoader; |
| 79 |
XSLoader::load JSON::XS::, $VERSION; |
| 80 |
} |
| 81 |
|
| 82 |
=head1 FUNCTIONAL INTERFACE |
| 83 |
|
| 84 |
The following convinience methods are provided by this module. They are |
| 85 |
exported by default: |
| 86 |
|
| 87 |
=over 4 |
| 88 |
|
| 89 |
=item $json_string = to_json $perl_scalar |
| 90 |
|
| 91 |
Converts the given Perl data structure (a simple scalar or a reference to |
| 92 |
a hash or array) to a UTF-8 encoded, binary string (that is, the string contains |
| 93 |
octets only). Croaks on error. |
| 94 |
|
| 95 |
This function call is functionally identical to C<< JSON::XS->new->utf8->encode ($perl_scalar) >>. |
| 96 |
|
| 97 |
=item $perl_scalar = from_json $json_string |
| 98 |
|
| 99 |
The opposite of C<to_json>: expects an UTF-8 (binary) string and tries to |
| 100 |
parse that as an UTF-8 encoded JSON string, returning the resulting simple |
| 101 |
scalar or reference. Croaks on error. |
| 102 |
|
| 103 |
This function call is functionally identical to C<< JSON::XS->new->utf8->decode ($json_string) >>. |
| 104 |
|
| 105 |
=back |
| 106 |
|
| 107 |
=head1 OBJECT-ORIENTED INTERFACE |
| 108 |
|
| 109 |
The object oriented interface lets you configure your own encoding or |
| 110 |
decoding style, within the limits of supported formats. |
| 111 |
|
| 112 |
=over 4 |
| 113 |
|
| 114 |
=item $json = new JSON::XS |
| 115 |
|
| 116 |
Creates a new JSON::XS object that can be used to de/encode JSON |
| 117 |
strings. All boolean flags described below are by default I<disabled>. |
| 118 |
|
| 119 |
The mutators for flags all return the JSON object again and thus calls can |
| 120 |
be chained: |
| 121 |
|
| 122 |
my $json = JSON::XS->new->utf8(1)->space_after(1)->encode ({a => [1,2]}) |
| 123 |
=> {"a": [1, 2]} |
| 124 |
|
| 125 |
=item $json = $json->ascii ([$enable]) |
| 126 |
|
| 127 |
If C<$enable> is true (or missing), then the C<encode> method will |
| 128 |
not generate characters outside the code range C<0..127>. Any unicode |
| 129 |
characters outside that range will be escaped using either a single |
| 130 |
\uXXXX (BMP characters) or a double \uHHHH\uLLLLL escape sequence, as per |
| 131 |
RFC4627. |
| 132 |
|
| 133 |
If C<$enable> is false, then the C<encode> method will not escape Unicode |
| 134 |
characters unless necessary. |
| 135 |
|
| 136 |
JSON::XS->new->ascii (1)->encode (chr 0x10401) |
| 137 |
=> \ud801\udc01 |
| 138 |
|
| 139 |
=item $json = $json->utf8 ([$enable]) |
| 140 |
|
| 141 |
If C<$enable> is true (or missing), then the C<encode> method will encode |
| 142 |
the JSON string into UTF-8, as required by many protocols, while the |
| 143 |
C<decode> method expects to be handled an UTF-8-encoded string. Please |
| 144 |
note that UTF-8-encoded strings do not contain any characters outside the |
| 145 |
range C<0..255>, they are thus useful for bytewise/binary I/O. |
| 146 |
|
| 147 |
If C<$enable> is false, then the C<encode> method will return the JSON |
| 148 |
string as a (non-encoded) unicode string, while C<decode> expects thus a |
| 149 |
unicode string. Any decoding or encoding (e.g. to UTF-8 or UTF-16) needs |
| 150 |
to be done yourself, e.g. using the Encode module. |
| 151 |
|
| 152 |
=item $json = $json->pretty ([$enable]) |
| 153 |
|
| 154 |
This enables (or disables) all of the C<indent>, C<space_before> and |
| 155 |
C<space_after> (and in the future possibly more) flags in one call to |
| 156 |
generate the most readable (or most compact) form possible. |
| 157 |
|
| 158 |
my $json = JSON::XS->new->pretty(1)->encode ({a => [1,2]}) |
| 159 |
=> |
| 160 |
{ |
| 161 |
"a" : [ |
| 162 |
1, |
| 163 |
2 |
| 164 |
] |
| 165 |
} |
| 166 |
|
| 167 |
=item $json = $json->indent ([$enable]) |
| 168 |
|
| 169 |
If C<$enable> is true (or missing), then the C<encode> method will use a multiline |
| 170 |
format as output, putting every array member or object/hash key-value pair |
| 171 |
into its own line, identing them properly. |
| 172 |
|
| 173 |
If C<$enable> is false, no newlines or indenting will be produced, and the |
| 174 |
resulting JSON strings is guarenteed not to contain any C<newlines>. |
| 175 |
|
| 176 |
This setting has no effect when decoding JSON strings. |
| 177 |
|
| 178 |
=item $json = $json->space_before ([$enable]) |
| 179 |
|
| 180 |
If C<$enable> is true (or missing), then the C<encode> method will add an extra |
| 181 |
optional space before the C<:> separating keys from values in JSON objects. |
| 182 |
|
| 183 |
If C<$enable> is false, then the C<encode> method will not add any extra |
| 184 |
space at those places. |
| 185 |
|
| 186 |
This setting has no effect when decoding JSON strings. You will also most |
| 187 |
likely combine this setting with C<space_after>. |
| 188 |
|
| 189 |
=item $json = $json->space_after ([$enable]) |
| 190 |
|
| 191 |
If C<$enable> is true (or missing), then the C<encode> method will add an extra |
| 192 |
optional space after the C<:> separating keys from values in JSON objects |
| 193 |
and extra whitespace after the C<,> separating key-value pairs and array |
| 194 |
members. |
| 195 |
|
| 196 |
If C<$enable> is false, then the C<encode> method will not add any extra |
| 197 |
space at those places. |
| 198 |
|
| 199 |
This setting has no effect when decoding JSON strings. |
| 200 |
|
| 201 |
=item $json = $json->canonical ([$enable]) |
| 202 |
|
| 203 |
If C<$enable> is true (or missing), then the C<encode> method will output JSON objects |
| 204 |
by sorting their keys. This is adding a comparatively high overhead. |
| 205 |
|
| 206 |
If C<$enable> is false, then the C<encode> method will output key-value |
| 207 |
pairs in the order Perl stores them (which will likely change between runs |
| 208 |
of the same script). |
| 209 |
|
| 210 |
This option is useful if you want the same data structure to be encoded as |
| 211 |
the same JSON string (given the same overall settings). If it is disabled, |
| 212 |
the same hash migh be encoded differently even if contains the same data, |
| 213 |
as key-value pairs have no inherent ordering in Perl. |
| 214 |
|
| 215 |
This setting has no effect when decoding JSON strings. |
| 216 |
|
| 217 |
=item $json = $json->allow_nonref ([$enable]) |
| 218 |
|
| 219 |
If C<$enable> is true (or missing), then the C<encode> method can convert a |
| 220 |
non-reference into its corresponding string, number or null JSON value, |
| 221 |
which is an extension to RFC4627. Likewise, C<decode> will accept those JSON |
| 222 |
values instead of croaking. |
| 223 |
|
| 224 |
If C<$enable> is false, then the C<encode> method will croak if it isn't |
| 225 |
passed an arrayref or hashref, as JSON strings must either be an object |
| 226 |
or array. Likewise, C<decode> will croak if given something that is not a |
| 227 |
JSON object or array. |
| 228 |
|
| 229 |
=item $json = $json->shrink ([$enable]) |
| 230 |
|
| 231 |
Perl usually over-allocates memory a bit when allocating space for |
| 232 |
strings. This flag optionally resizes strings generated by either |
| 233 |
C<encode> or C<decode> to their minimum size possible. This can save |
| 234 |
memory when your JSON strings are either very very long or you have many |
| 235 |
short strings. It will also try to downgrade any strings to octet-form |
| 236 |
if possible: perl stores strings internally either in an encoding called |
| 237 |
UTF-X or in octet-form. The latter cannot store everything but uses less |
| 238 |
space in general. |
| 239 |
|
| 240 |
If C<$enable> is true (or missing), the string returned by C<encode> will be shrunk-to-fit, |
| 241 |
while all strings generated by C<decode> will also be shrunk-to-fit. |
| 242 |
|
| 243 |
If C<$enable> is false, then the normal perl allocation algorithms are used. |
| 244 |
If you work with your data, then this is likely to be faster. |
| 245 |
|
| 246 |
In the future, this setting might control other things, such as converting |
| 247 |
strings that look like integers or floats into integers or floats |
| 248 |
internally (there is no difference on the Perl level), saving space. |
| 249 |
|
| 250 |
=item $json_string = $json->encode ($perl_scalar) |
| 251 |
|
| 252 |
Converts the given Perl data structure (a simple scalar or a reference |
| 253 |
to a hash or array) to its JSON representation. Simple scalars will be |
| 254 |
converted into JSON string or number sequences, while references to arrays |
| 255 |
become JSON arrays and references to hashes become JSON objects. Undefined |
| 256 |
Perl values (e.g. C<undef>) become JSON C<null> values. Neither C<true> |
| 257 |
nor C<false> values will be generated. |
| 258 |
|
| 259 |
=item $perl_scalar = $json->decode ($json_string) |
| 260 |
|
| 261 |
The opposite of C<encode>: expects a JSON string and tries to parse it, |
| 262 |
returning the resulting simple scalar or reference. Croaks on error. |
| 263 |
|
| 264 |
JSON numbers and strings become simple Perl scalars. JSON arrays become |
| 265 |
Perl arrayrefs and JSON objects become Perl hashrefs. C<true> becomes |
| 266 |
C<1>, C<false> becomes C<0> and C<null> becomes C<undef>. |
| 267 |
|
| 268 |
=back |
| 269 |
|
| 270 |
=head1 MAPPING |
| 271 |
|
| 272 |
This section describes how JSON::XS maps Perl values to JSON values and |
| 273 |
vice versa. These mappings are designed to "do the right thing" in most |
| 274 |
circumstances automatically, preserving round-tripping characteristics |
| 275 |
(what you put in comes out as something equivalent). |
| 276 |
|
| 277 |
For the more enlightened: note that in the following descriptions, |
| 278 |
lowercase I<perl> refers to the Perl interpreter, while uppcercase I<Perl> |
| 279 |
refers to the abstract Perl language itself. |
| 280 |
|
| 281 |
=head2 JSON -> PERL |
| 282 |
|
| 283 |
=over 4 |
| 284 |
|
| 285 |
=item object |
| 286 |
|
| 287 |
A JSON object becomes a reference to a hash in Perl. No ordering of object |
| 288 |
keys is preserved. |
| 289 |
|
| 290 |
=item array |
| 291 |
|
| 292 |
A JSON array becomes a reference to an array in Perl. |
| 293 |
|
| 294 |
=item string |
| 295 |
|
| 296 |
A JSON string becomes a string scalar in Perl - Unicode codepoints in JSON |
| 297 |
are represented by the same codepoints in the Perl string, so no manual |
| 298 |
decoding is necessary. |
| 299 |
|
| 300 |
=item number |
| 301 |
|
| 302 |
A JSON number becomes either an integer or numeric (floating point) |
| 303 |
scalar in perl, depending on its range and any fractional parts. On the |
| 304 |
Perl level, there is no difference between those as Perl handles all the |
| 305 |
conversion details, but an integer may take slightly less memory and might |
| 306 |
represent more values exactly than (floating point) numbers. |
| 307 |
|
| 308 |
=item true, false |
| 309 |
|
| 310 |
These JSON atoms become C<0>, C<1>, respectively. Information is lost in |
| 311 |
this process. Future versions might represent those values differently, |
| 312 |
but they will be guarenteed to act like these integers would normally in |
| 313 |
Perl. |
| 314 |
|
| 315 |
=item null |
| 316 |
|
| 317 |
A JSON null atom becomes C<undef> in Perl. |
| 318 |
|
| 319 |
=back |
| 320 |
|
| 321 |
=head2 PERL -> JSON |
| 322 |
|
| 323 |
The mapping from Perl to JSON is slightly more difficult, as Perl is a |
| 324 |
truly typeless language, so we can only guess which JSON type is meant by |
| 325 |
a Perl value. |
| 326 |
|
| 327 |
=over 4 |
| 328 |
|
| 329 |
=item hash references |
| 330 |
|
| 331 |
Perl hash references become JSON objects. As there is no inherent ordering |
| 332 |
in hash keys, they will usually be encoded in a pseudo-random order that |
| 333 |
can change between runs of the same program but stays generally the same |
| 334 |
within the single run of a program. JSON::XS can optionally sort the hash |
| 335 |
keys (determined by the I<canonical> flag), so the same datastructure |
| 336 |
will serialise to the same JSON text (given same settings and version of |
| 337 |
JSON::XS), but this incurs a runtime overhead. |
| 338 |
|
| 339 |
=item array references |
| 340 |
|
| 341 |
Perl array references become JSON arrays. |
| 342 |
|
| 343 |
=item blessed objects |
| 344 |
|
| 345 |
Blessed objects are not allowed. JSON::XS currently tries to encode their |
| 346 |
underlying representation (hash- or arrayref), but this behaviour might |
| 347 |
change in future versions. |
| 348 |
|
| 349 |
=item simple scalars |
| 350 |
|
| 351 |
Simple Perl scalars (any scalar that is not a reference) are the most |
| 352 |
difficult objects to encode: JSON::XS will encode undefined scalars as |
| 353 |
JSON null value, scalars that have last been used in a string context |
| 354 |
before encoding as JSON strings and anything else as number value: |
| 355 |
|
| 356 |
# dump as number |
| 357 |
to_json [2] # yields [2] |
| 358 |
to_json [-3.0e17] # yields [-3e+17] |
| 359 |
my $value = 5; to_json [$value] # yields [5] |
| 360 |
|
| 361 |
# used as string, so dump as string |
| 362 |
print $value; |
| 363 |
to_json [$value] # yields ["5"] |
| 364 |
|
| 365 |
# undef becomes null |
| 366 |
to_json [undef] # yields [null] |
| 367 |
|
| 368 |
You can force the type to be a string by stringifying it: |
| 369 |
|
| 370 |
my $x = 3.1; # some variable containing a number |
| 371 |
"$x"; # stringified |
| 372 |
$x .= ""; # another, more awkward way to stringify |
| 373 |
print $x; # perl does it for you, too, quite often |
| 374 |
|
| 375 |
You can force the type to be a number by numifying it: |
| 376 |
|
| 377 |
my $x = "3"; # some variable containing a string |
| 378 |
$x += 0; # numify it, ensuring it will be dumped as a number |
| 379 |
$x *= 1; # same thing, the choise is yours. |
| 380 |
|
| 381 |
You can not currently output JSON booleans or force the type in other, |
| 382 |
less obscure, ways. Tell me if you need this capability. |
| 383 |
|
| 384 |
=item circular data structures |
| 385 |
|
| 386 |
Those will be encoded until memory or stackspace runs out. |
| 387 |
|
| 388 |
=back |
| 389 |
|
| 390 |
=head1 COMPARISON |
| 391 |
|
| 392 |
As already mentioned, this module was created because none of the existing |
| 393 |
JSON modules could be made to work correctly. First I will describe the |
| 394 |
problems (or pleasures) I encountered with various existing JSON modules, |
| 395 |
followed by some benchmark values. JSON::XS was designed not to suffer |
| 396 |
from any of these problems or limitations. |
| 397 |
|
| 398 |
=over 4 |
| 399 |
|
| 400 |
=item JSON 1.07 |
| 401 |
|
| 402 |
Slow (but very portable, as it is written in pure Perl). |
| 403 |
|
| 404 |
Undocumented/buggy Unicode handling (how JSON handles unicode values is |
| 405 |
undocumented. One can get far by feeding it unicode strings and doing |
| 406 |
en-/decoding oneself, but unicode escapes are not working properly). |
| 407 |
|
| 408 |
No roundtripping (strings get clobbered if they look like numbers, e.g. |
| 409 |
the string C<2.0> will encode to C<2.0> instead of C<"2.0">, and that will |
| 410 |
decode into the number 2. |
| 411 |
|
| 412 |
=item JSON::PC 0.01 |
| 413 |
|
| 414 |
Very fast. |
| 415 |
|
| 416 |
Undocumented/buggy Unicode handling. |
| 417 |
|
| 418 |
No roundtripping. |
| 419 |
|
| 420 |
Has problems handling many Perl values (e.g. regex results and other magic |
| 421 |
values will make it croak). |
| 422 |
|
| 423 |
Does not even generate valid JSON (C<{1,2}> gets converted to C<{1:2}> |
| 424 |
which is not a valid JSON string. |
| 425 |
|
| 426 |
Unmaintained (maintainer unresponsive for many months, bugs are not |
| 427 |
getting fixed). |
| 428 |
|
| 429 |
=item JSON::Syck 0.21 |
| 430 |
|
| 431 |
Very buggy (often crashes). |
| 432 |
|
| 433 |
Very inflexible (no human-readable format supported, format pretty much |
| 434 |
undocumented. I need at least a format for easy reading by humans and a |
| 435 |
single-line compact format for use in a protocol, and preferably a way to |
| 436 |
generate ASCII-only JSON strings). |
| 437 |
|
| 438 |
Completely broken (and confusingly documented) Unicode handling (unicode |
| 439 |
escapes are not working properly, you need to set ImplicitUnicode to |
| 440 |
I<different> values on en- and decoding to get symmetric behaviour). |
| 441 |
|
| 442 |
No roundtripping (simple cases work, but this depends on wether the scalar |
| 443 |
value was used in a numeric context or not). |
| 444 |
|
| 445 |
Dumping hashes may skip hash values depending on iterator state. |
| 446 |
|
| 447 |
Unmaintained (maintainer unresponsive for many months, bugs are not |
| 448 |
getting fixed). |
| 449 |
|
| 450 |
Does not check input for validity (i.e. will accept non-JSON input and |
| 451 |
return "something" instead of raising an exception. This is a security |
| 452 |
issue: imagine two banks transfering money between each other using |
| 453 |
JSON. One bank might parse a given non-JSON request and deduct money, |
| 454 |
while the other might reject the transaction with a syntax error. While a |
| 455 |
good protocol will at least recover, that is extra unnecessary work and |
| 456 |
the transaction will still not succeed). |
| 457 |
|
| 458 |
=item JSON::DWIW 0.04 |
| 459 |
|
| 460 |
Very fast. Very natural. Very nice. |
| 461 |
|
| 462 |
Undocumented unicode handling (but the best of the pack. Unicode escapes |
| 463 |
still don't get parsed properly). |
| 464 |
|
| 465 |
Very inflexible. |
| 466 |
|
| 467 |
No roundtripping. |
| 468 |
|
| 469 |
Does not generate valid JSON (key strings are often unquoted, empty keys |
| 470 |
result in nothing being output) |
| 471 |
|
| 472 |
Does not check input for validity. |
| 473 |
|
| 474 |
=back |
| 475 |
|
| 476 |
=head2 SPEED |
| 477 |
|
| 478 |
It seems that JSON::XS is surprisingly fast, as shown in the following |
| 479 |
tables. They have been generated with the help of the C<eg/bench> program |
| 480 |
in the JSON::XS distribution, to make it easy to compare on your own |
| 481 |
system. |
| 482 |
|
| 483 |
First is a comparison between various modules using a very simple JSON |
| 484 |
string, showing the number of encodes/decodes per second (JSON::XS is |
| 485 |
the functional interface, while JSON::XS/2 is the OO interface with |
| 486 |
pretty-printing and hashkey sorting enabled). |
| 487 |
|
| 488 |
module | encode | decode | |
| 489 |
-----------|------------|------------| |
| 490 |
JSON | 14006 | 6820 | |
| 491 |
JSON::DWIW | 200937 | 120386 | |
| 492 |
JSON::PC | 85065 | 129366 | |
| 493 |
JSON::Syck | 59898 | 44232 | |
| 494 |
JSON::XS | 1171478 | 342435 | |
| 495 |
JSON::XS/2 | 730760 | 328714 | |
| 496 |
-----------+------------+------------+ |
| 497 |
|
| 498 |
That is, JSON::XS is 6 times faster than than JSON::DWIW and about 80 |
| 499 |
times faster than JSON, even with pretty-printing and key sorting. |
| 500 |
|
| 501 |
Using a longer test string (roughly 8KB, generated from Yahoo! Locals |
| 502 |
search API (http://nanoref.com/yahooapis/mgPdGg): |
| 503 |
|
| 504 |
module | encode | decode | |
| 505 |
-----------|------------|------------| |
| 506 |
JSON | 673 | 38 | |
| 507 |
JSON::DWIW | 5271 | 770 | |
| 508 |
JSON::PC | 9901 | 2491 | |
| 509 |
JSON::Syck | 2360 | 786 | |
| 510 |
JSON::XS | 37398 | 3202 | |
| 511 |
JSON::XS/2 | 13765 | 3153 | |
| 512 |
-----------+------------+------------+ |
| 513 |
|
| 514 |
Again, JSON::XS leads by far in the encoding case, while still beating |
| 515 |
every other module in the decoding case. |
| 516 |
|
| 517 |
Last example is an almost 8MB large hash with many large binary values |
| 518 |
(PNG files), resulting in a lot of escaping: |
| 519 |
|
| 520 |
=head1 RESOURCE LIMITS |
| 521 |
|
| 522 |
JSON::XS does not impose any limits on the size of JSON texts or Perl |
| 523 |
values they represent - if your machine cna handle it, JSON::XS will |
| 524 |
encode or decode it. Future versions might optionally impose structure |
| 525 |
depth and memory use resource limits. |
| 526 |
|
| 527 |
=head1 BUGS |
| 528 |
|
| 529 |
While the goal of this module is to be correct, that unfortunately does |
| 530 |
not mean its bug-free, only that I think its design is bug-free. It is |
| 531 |
still very young and not well-tested. If you keep reporting bugs they will |
| 532 |
be fixed swiftly, though. |
| 533 |
|
| 534 |
=cut |
| 535 |
|
| 536 |
1; |
| 537 |
|
| 538 |
=head1 AUTHOR |
| 539 |
|
| 540 |
Marc Lehmann <schmorp@schmorp.de> |
| 541 |
http://home.schmorp.de/ |
| 542 |
|
| 543 |
=cut |
| 544 |
|
