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341 Commits

Author SHA1 Message Date
Nikita Popov
b2961915a6 Fix XML serialization test 
I have no idea why this suddenly turned up *now*
 2015-09-21 14:29:24 +08:00
Nikita Popov
eecaf1e93b Merge branch '1.x' 
Conflicts:
	grammar/rebuildParsers.php
	lib/PhpParser/Parser.php
 2015-09-19 22:07:29 +08:00
Nikita Popov
950ada4cba Fix issue #227 
Use \z instead of $.
 2015-09-19 22:05:23 +08:00
Dmitry Patsura
e3a9356178 Use composer PSR-4 autoloader 2015-09-16 22:02:00 +09:00
Nikita Popov
fe6755ff4c Use more helpful code test names 2015-08-25 21:36:08 +02:00
Nikita Popov
f57d217e91 Update group use support 
To conform with current PHP 7 implementation

* Allow use \Foo\{Bar};
* Disallow use Foo\{\Bar};
* Disallow missing trailing semicolon (that was a bug)
 2015-08-20 16:42:49 +02:00
Nikita Popov
dc85742034 Merge branch '1.x' 
Conflicts:
	CHANGELOG.md
	composer.json
	test/PhpParser/ParserTest.php
 2015-07-14 19:43:49 +02:00
Nikita Popov
b9afcdfd92 Revert "Make tests compatible with PHP 7" 
This reverts commit 91295a0790.

This should no longer be necessary.

Conflicts:
	test/PhpParser/ParserTest.php
 2015-07-14 19:21:57 +02:00
Nikita Popov
feb82eed33 Disable cloning in traverser by default 2015-07-14 17:39:56 +02:00
Nikita Popov
0ef15c111a Merge branch '1.x' 2015-07-14 17:08:28 +02:00
Nikita Popov
d341d94976 Add ClassLike::getMethod($name) 
To allow getting individual method with a given name.
 2015-07-14 17:07:45 +02:00
Nikita Popov
0265c28e6e Switch NameResolver resolve methods to be immutable 
To make it theoretically possible to expose this as API.

Add slice() method to Name to allow this. Deprecate existing mutable
Name APIs.
 2015-07-12 23:56:57 +02:00
Nikita Popov
5bd8cb84de Add dummy ParserFactory test 
:/
 2015-07-12 22:53:17 +02:00
Nikita Popov
ebeeae19a6 Merge branch '1.x' 2015-07-12 22:12:28 +02:00
Nikita Popov
5ede167835 Fix infinite recursion in Use builder __call 2015-07-12 22:11:43 +02:00
Nikita Popov
21e51c8cf6 Add some tests for Multiple parser 2015-07-12 22:00:02 +02:00
Nikita Popov
e7a2abb03b Merge branch '1.x' 2015-07-11 22:33:19 +02:00
Nikita Popov
b862de1f5b Support properties in trait builder 2015-07-11 22:31:45 +02:00
Nikita Popov
8090531acd Fix pretty printing of const derefs for 5.x 
(FOO)[0] is only supported on 7.x
 2015-07-09 12:38:30 +02:00
Nikita Popov
1d62e9d8cc Fix implicit visibility for properties as well 
Also switch to using PPP mask.
 2015-07-05 20:17:52 +02:00
Lisachenko Alexander
2a3bc608dc Add broken test for implicit public nodes 2015-07-05 20:17:49 +02:00
Nikita Popov
90ab32f046 Merge branch '1.x' 2015-07-05 20:16:41 +02:00
Nikita Popov
7434a682e5 Fix implicit visibility for properties as well 
Also switch to using PPP mask.
 2015-07-05 20:16:21 +02:00
Lisachenko Alexander
5e6627c895 Add broken test for implicit public nodes 2015-07-05 20:10:47 +02:00
Nikita Popov
f872fa9b0b Merge branch '1.x' 2015-07-04 14:40:53 +02:00
Nikita Popov
d5668f536d Fix __HALT_COMPILER_OFFSET__ support on HHVM 2015-07-04 13:15:48 +02:00
Nikita Popov
9c9a8cddce Merge branch '1.x' 2015-06-20 12:34:36 +02:00
Nikita Popov
fd7ee2e083 Add missing regex anchor 2015-06-20 12:34:10 +02:00
Nikita Popov
f2b7a31509 Rename ParserInterface to Parser 
And drop the alias of Parser to Parser\Php5.
 2015-06-20 11:47:25 +02:00
Nikita Popov
d8312a09a3 Split parsing tests into code tests and other stuff 
And run the other stuff against Php5 and Php7 parsers.

Also move canonicalize() from CodeTestAbstract into a free-standing
function.
 2015-06-20 11:44:29 +02:00
Nikita Popov
ef9a154d09 Add support for unicode escape sequences 
Only parsed if the PHP 7 parser is used.
 2015-06-13 20:51:02 +02:00
Nikita Popov
0da72fad00 Support scalar type declarations 2015-06-13 20:16:09 +02:00
Nikita Popov
71fa7c6674 Support UVS in pretty printer 
Try to generate interoperable code where possible (but not
everything can be expressed in PHP 5).
 2015-06-13 20:01:01 +02:00
Nikita Popov
f3f24e03ae Support running against PHP 7 testsuite 2015-06-13 19:09:24 +02:00
Nikita Popov
bc21514ecf Move token constants into separate class 
As these are shared between Php5 and Php7 parsers they should be
in some common place, otherwise we'd have to always reference either
one or the other.
 2015-06-13 18:39:55 +02:00
Nikita Popov
04e05907c3 Fix CRLF issue in Serializer\XML test 
No idea why this suddenly turned up now.
 2015-06-13 18:20:05 +02:00
Nikita Popov
61e060694d Implement generalized yield operator 
And split tokens.y off, so I don't waste time debugging this again...
 2015-06-13 18:11:40 +02:00
Nikita Popov
602b9807eb Import some UVS tests 2015-06-13 15:42:09 +02:00
Nikita Popov
f372a4c4ab Move modeline handling into CodeTestAbstract 2015-06-13 15:10:46 +02:00
Nikita Popov
d18dcc0c7f Implement UVS 2015-06-13 14:59:24 +02:00
Nikita Popov
74c57eef0e Test PHP 5 and PHP 7 parsers 
At this point they should return the same result.
 2015-06-13 13:56:45 +02:00
Nikita Popov
dca46febc9 Implement semi-reserved identifiers 2015-06-13 12:47:13 +02:00
Nikita Popov
1a1bd1448d Support mixed group use declarations 2015-06-13 11:27:38 +02:00
Nikita Popov
9620f79cdc Add partial group use support 
Supported via Stmt\GroupUse which has Name $prefix in addition to
the usual.

Still missing: Mixed group uses.
 2015-06-12 23:05:28 +02:00
Nikita Popov
5d1e3be7d4 Anonymize some callbacks 2015-05-02 22:35:15 +02:00
Nikita Popov
cc75dd3612 Drop support for PHP 7 aliases 2015-05-02 22:21:12 +02:00
Nikita Popov
5f621c5adc Drop support for legacy aliases from v0.9 2015-05-02 22:19:25 +02:00
Nikita Popov
29b9015f51 Drop support for old Node format 2015-05-02 22:17:34 +02:00
Nikita Popov
8b64195cf2 Try .17G print if .16G is not enough 
This should be enough for all cases, because: A double has 53 bits
of mantissa (including the implicit 1 bit), which is 53*ln(2)/ln(10)
= 15.95 decimal digits. However the leading decimal digit may encode
less than the usual 3.32 bits, which will push this over the edge to
requiring 17 decimal digits.
 2015-05-02 11:48:55 +02:00
Nikita Popov
9caa51b3a5 Add some more tests 2015-05-01 20:18:04 +02:00
Nikita Popov
648800f07f Increase float pretty printing precision 
This removes the reliance on the "precision" ini setting.
Furthermore the default of precision=14 is not sufficient.
 2015-05-01 19:15:33 +02:00
Nikita Popov
23bf4f0c13 Add some error documentation 2015-04-30 21:58:45 +02:00
Nikita Popov
272ab6c8d8 Add some recovery tests 2015-04-30 19:02:51 +02:00
Nikita Popov
0731b47655 Don't distinguish test-fail / test 
With error recovery this is fluid. Using .test for everything.
 2015-04-30 17:45:36 +02:00
Nikita Popov
3b7d8e8b5d Enable basic error recovery 
Adding only a single recovery rule for now.

The API is now:
 * throwOnError parser option must be disabled.
 * List of Errors is available through $parser->getErrors(). This
   method is available either way.
 * If no recovery is possible $parser->parse() will return null.
   (Obviously only if throwOnError is disabled).
 2015-04-30 17:41:57 +02:00
Nikita Popov
a35c2a2067 Add column info to EOF errors 
EOF errors are now located one past the end of the file.
 2015-04-27 15:37:41 +02:00
Nikita Popov
55b2ead967 Make special class name checks case insensitive 2015-04-26 23:13:27 +02:00
Nikita Popov
e1a0ec3724 Add support for anonymous classes 
Has not landed upstream yet, but syntax is unlikely to change.
 2015-04-26 23:04:31 +02:00
Nikita Popov
338bc1f8e7 Fix "print" pretty-printing 
Precedence was previously ignored.
 2015-04-26 11:56:04 +02:00
Nikita Popov
ab80054e97 Add support for "yield from" 2015-04-26 11:56:02 +02:00
Nikita Popov
c8454271e1 Make column info 1-based 2015-04-18 21:20:45 +02:00
Nikita Popov
62f83a0dc2 Add column info for non-syntax errors where relatively precise 
Should it also be added if only rough information is available? E.g.
spanning an entire class?
 2015-04-18 13:27:58 +02:00
Nikita Popov
611fa5c7f1 Test parser position information (syntax errors) 2015-04-18 13:27:57 +02:00
Nikita Popov
4defbc2174 Make Error column info attribute based 2015-04-18 12:51:26 +02:00
Gerrit Addiks
33a39fae06 added column-numbers to syntax errors 2015-04-18 10:14:49 +02:00
Nikita Popov
617bf0aa41 Fix registering of PHP 7 aliases 
The previous approach was causing issues, because "instanceof"
does not invoke the autoloader.
 2015-03-24 20:04:50 +01:00
Nikita Popov
dce19b074b Strict type compliance 
Were this library to be fully annotated with scalar types and
return types where possible and were strict types to be enabled
for all files, the test suite would now pass.
 2015-03-24 11:19:17 +01:00
Matthieu Napoli
729c7bde0c #184 Add a flag to NodeTraverser to avoid cloning nodes 2015-03-22 11:19:04 +13:00
Nikita Popov
8982315b4e Rename Cast\Object as well 
As it will very likely be soft-reserved in PHP 7.

Old alias is still available, as usual.
 2015-03-21 18:57:55 +01:00
Nikita Popov
7ec277e1e1 Replace another Scalar\String occurance 
Also canonicalize NameResover tests to avoid those pesky CRLF
issues.
 2015-03-21 18:47:20 +01:00
Nikita Popov
1a627872f0 Rename nodes for compat with PHP 7 
The old names will still be available on PHP 5.x.
 2015-03-20 21:49:38 +01:00
Nikita Popov
592836c4dc Add support for T_HASHBANG (HHVM) 2015-03-14 19:53:08 +01:00
Nikita Popov
251e689283 Add support for spaceship operator (<=>) [PHP 7] 
Added as Expr\BinaryOp\Spaceship.
 2015-03-12 23:13:31 +01:00
Nikita Popov
01f4be6b4d Add support for null coalesce operator (??) [PHP 7] 
Added as Expr\BinaryOp\Coalesce.
 2015-03-12 22:45:56 +01:00
Nikita Popov
dc28449d81 Drop whitespace after ... varargs collection 
Also drop an obsolete pretty printer test.
 2015-03-12 22:19:34 +01:00
Nikita Popov
3ad0d4b310 Add support for return type declarations [PHP 7] 
This adds an additional "returnType" subnode to Stmt\Function_,
Stmt\ClassMethod and Expr\Closure, as well as the corresponding
support in the name resolver and pretty printer.
 2015-03-12 22:16:12 +01:00
Nikita Popov
4dbf067b4b Add a few more string interpolation tests 
Originally wanted to simplify the pretty-printer output, but ...
edge cases everywhere :/
 2015-03-11 20:01:26 +01:00
Nikita Popov
0c34706799 Add "use" builder 2015-03-10 16:05:55 +01:00
Nikita Popov
f9fc2fc9ee Add support for global namespace in NS builder 
NULL argument can now be used to create a global namespace {} block.
 2015-03-10 15:28:19 +01:00
Nikita Popov
a2d7e8977a Use real properties for storing subnodes 
Instead of storing subnodes in a subNodes dictionary, they are
now stored as simple properties. This requires declarating the
properties, assigning them in the constructor, overriding
the getSubNodeNames() method and passing NULL to the first argument
of the NodeAbstract constructor.

[Deprecated: It's still possible to use the old mode of operation
for custom nodes by passing an array of subnodes to the constructor.]

The only behavior difference this should cause is that getSubNodeNames()
will always return the original subnode names and skip any additional
properties that were dynamically added. E.g. this means that the
"namespacedName" node added by the NameResolver visitor is not treated
as a subnode, but as a dynamic property instead.

This change improves performance and memory usage.
 2015-03-09 08:54:20 +01:00
Thomas Ruiz
73cace360d Implicit public should not generate as explicit public 2015-03-08 20:21:01 +01:00
Nikita Popov
d56ff5a351 Fix lexer tests for HHVM 
HHVM does not throw warnings from token_get_all()
for invalid chars and unterminated comments. This
is not really integral functionality, so I'm okay
to just skip it to get a passing HHVM build.
 2015-02-26 19:19:40 +01:00
Nikita Popov
3028bc8081 And make it work on PHP 5 as well... 2015-02-26 16:40:21 +01:00
Nikita Popov
91295a0790 Make tests compatible with PHP 7 
When parsing on PHP 7 we will no longer be able to deal with
code that contains invalid octal literals. Currently we'll fatal,
after engine exceptions land we'll throw an exception instead.
 2015-02-26 16:26:29 +01:00
Tom Rochette
1366e833a1 Move getMethods() to new ClassLike node 
Class_, Interface_ and Trait_ extend the ClassLike node, which
provides the getMethods() method.
 2015-01-31 22:59:38 +01:00
Nikita Popov
6930feac43 Add some tests for pretty printing expressions 2015-01-18 19:57:09 +01:00
Nikita Popov
0a445c7656 Test lexer returning invalid token 2015-01-18 00:11:10 +01:00
Nikita Popov
9689763e20 Cover both DONT_TRAVERSE_CHILDREN cases 2015-01-18 00:10:01 +01:00
Nikita Popov
4071c4645d Add NodeTraverser::DONT_TRAVERSE_CHILDREN support 2015-01-11 22:13:58 +01:00
Nikita Popov
4cd2b95a23 Fix 5.3 build and some small cleanups 2014-12-19 18:54:56 +01:00
Nikita Popov
7ab88416ac Enforce Name|string for names in builders 
While array (with name components) could technically be allowed (as
they are supported by the Name node itself), more likely than not
an array would due to incorrect usage of the API (e.g. array instead
of variadics).
 2014-12-19 18:50:16 +01:00
Nikita Popov
ba625063e7 Support fully-qualified and ns-relative names in builders 2014-12-19 18:48:21 +01:00
Nikita Popov
b4b93ccb21 Add integration test for builders 2014-12-19 18:35:19 +01:00
Stepan Anchugov
01643e06d3 Add namespace builder 2014-12-19 18:19:33 +01:00
Nikita Popov
4387454fe0 Add trait builder (for completeness...) 2014-12-19 17:59:23 +01:00
Nikita Popov
e69c9ee38c Fix attribute assigment test with crlf newlines 2014-12-19 17:28:22 +01:00
Nikita Popov
894c3f787d Add test for attribute assignment by parser 
Weird that this wasn't tested yet...
 2014-12-19 00:37:38 +01:00
Nikita Popov
46975107a7 Support token position attributes in lexer 
Also change endFilePos semantics to refer to the last character that
is *included* in the token, rather than one past the last character.
This ensures that all end* attributes have the same semantics.
 2014-12-19 00:37:36 +01:00
Nikita Popov
2438848487 Add support for doc comments in builders 2014-12-13 13:44:40 +01:00
nikic
8507af6f4a Add missing require in tests 
Test files aren't autoloaded, so this was order-dependent.
 2014-11-27 21:01:56 +01:00
nikic
7c98ad6f9b Support file offsets in emulative lexer as well 
Also run normal lexer tests against emulative lexer and fix a bug
in __halt_compiler() handling found as a result.
 2014-11-27 20:57:38 +01:00
Máximo Cuadros Ortiz
d774dbc1b7 Add optional startFilePos and endFilePos attributes 
The lexer can now optionally add startFilePos and endFilePos
attributes, which are offsets in to the lexed code string.

The end offset currently points one past the last character of
the token - this is pending further discussion.

The attributes are not added by default and have to be enabled
using the new 'usedAttributes' lexer option:

	$lexer = new Lexer([
		'usedAttributes' => [
			'comments', 'startLine', 'endLine',
			'startFilePos', 'endFilePos'
		]
	]);
 2014-11-27 20:38:29 +01:00
nikic
e26e63e9b0 Error on final or abstract properties 2014-11-13 20:25:52 +01:00
nikic
0f69f12b94 Use "public" visibility when not explicitly given 
Fixes issue #143
 2014-11-13 20:21:21 +01:00
nikic
7fbdb79a08 Fix whitespace when printing trait alias modifiers 2014-11-03 16:16:15 +01:00
Arne Blankerts
6fad8ff32a Make NameResolver resolve trait alias and precedence names 2014-11-03 16:06:43 +01:00
nikic
66fd29cb58 Use stricter assertions where possible 2014-09-30 20:38:09 +02:00
nikic
69701430c1 Cover remaining constant scalar expressions 2014-09-28 13:05:23 +02:00
nikic
6dc24fa9f5 Fix coverage annotations 2014-09-28 12:49:12 +02:00
nikic
3e1665bbbd Disallow new without a class name 
Fixes #137.
 2014-09-28 12:41:35 +02:00
nikic
6423864160 Add Autoloader tests 2014-09-12 13:45:34 +02:00
nikic
fd064dac6c Very that node type is valid in XML unserializer 2014-09-12 00:39:59 +02:00
nikic
d9bd550414 Fix XML unserializer 2014-09-12 00:37:21 +02:00
nikic
94eca2ce44 Remove deprecated Template and TemplateLoader 2014-09-12 00:25:30 +02:00
nikic
452e1c0180 Add constant dereferencing, a list-minute 5.6 change 2014-08-31 16:14:36 +02:00
nikic
6d0589d14f Ensure that special class names are unqualified 
Replicates the PHP error message
 2014-08-11 22:04:52 +02:00
nikic
ef121e690c Preserve case of "static" class name 2014-08-11 21:44:50 +02:00
Elliot Levin
c0340053d1 Fix case sensitivity for special class names 2014-08-11 21:41:54 +02:00
nikic
1f143393e5 Rewrite namespace handling code 
Add a check for disallowed statements between braced namespaces
while at it.
 2014-04-21 15:16:00 +02:00
nikic
4743e9b0b8 Update constant scalar expression support 2014-04-19 22:53:13 +02:00
nikic
91f6880734 Improve pretty printing of empty statement lists 
The pStmts() method now also includes the leading \n, however only
if the statement list is non-empty.
 2014-03-27 12:31:21 +01:00
nikic
a5e0bbcb62 Support use function/const in name resolver 2014-03-26 23:28:32 +01:00
nikic
3b7829b011 Add support for function and constant import (PHP 5.6) 2014-03-26 22:33:45 +01:00
nikic
bea89a0bf2 Add support for constant scalar expressions (PHP 5.6) 2014-03-26 21:48:12 +01:00
nikic
cda6f575f0 Add support for pow operator (PHP 5.6) 2014-03-26 19:18:16 +01:00
nikic
b5bcfa1168 Add support for argument unpacking (PHP 5.6) 2014-03-26 18:42:46 +01:00
nikic
96f1151ab2 Add support for variadic parameters (PHP 5.6) 2014-03-26 18:23:30 +01:00
nikic
f5be0d30f7 Guarantee that subnodes are always in the right order 2014-03-22 14:49:56 +01:00
Tomáš Polomský
c8c233f900 Correctly pretty print negative floats 2014-03-22 14:24:35 +01:00
nikic
70077039b4 Add Scalar\MagicConst->getName() 
Return magic constant name, e.g. __CLASS__.

Resolves #95.
 2014-02-21 18:16:18 +01:00
nikic
1c8481bff6 Merge branch '0.9' 
Conflicts:
	lib/PhpParser/Lexer.php
	lib/PhpParser/Node/Stmt/Class.php
	lib/PhpParser/Node/Stmt/ClassMethod.php
	lib/PhpParser/Node/Stmt/Interface.php
	lib/PhpParser/Node/Stmt/Namespace.php
	lib/PhpParser/Node/Stmt/UseUse.php
	lib/PhpParser/Parser.php
 2014-02-12 20:23:12 +01:00
Martin Hasoň
118f28344d Synchronized error messages with native php error messages 2014-02-12 20:19:48 +01:00
nikic
f82862ec9c Port library to use namespaces, with BC for old names 2014-02-06 20:29:35 +01:00
Jean-François Simon
7f4ab26732 Fix name resolver (class names are case insensitive) 2013-11-15 20:27:56 +01:00
Charles Sprayberry
700847e295 Add NodeTraverser::removeVisitor() 2013-09-28 13:21:30 +02:00
nikic
77c08a75c9 Fix pretty printing of include expressions 2013-07-27 16:23:27 +02:00
Florent
12faad529e Add interface builder 2013-05-23 15:14:58 +02:00
nikic
08f0cde6f9 Add prettyPrintFile() method 2013-04-15 20:53:23 +02:00
nikic
75ec7a3e78 Looks like I forgot to git add some files... 2013-02-14 21:49:08 +01:00
nikic
81d20bf10e Pretty print namespaces in semicolon-style if possible 2013-01-15 18:21:42 +01:00
nikic
db18906dfc Rename PrettyPrinter_Zend to PrettyPrinter_Default 2013-01-15 17:43:36 +01:00
nikic
fbaa1e5fc3 Add information on expected tokens to syntax errors 
This now mimics the error messages provided by PHP itself (pre 5.4).
 2013-01-15 17:30:14 +01:00
nikic
df17d62b40 Fix switch formatting 
The switch cases were not indented and fall-through cases had an
unnecessary additional newline.

Patch by @pscheit (PR #39).
 2012-10-31 17:46:48 +01:00
nikic
ac6f221c50 Better prededence and associativity handling in pretty printer 
Previously the pretty printer added unnecessary and odd-looking parentheses
when several operators with the same precedence were chained:

    'a' . 'b' . 'c' . 'd' . 'e'
    // was printed as
    'a' . ('b' . ('c' . ('d' . 'e')))

Another issue reported as part of #39 was that assignments inside closures
were wrapped in parentheses:

    function() {
        $a = $b;
    }
    // was printed as
    function() {
        ($a = $b);
    }

This was caused by the automatic precedence handling, which just regarded
the closure as an ordinal nested expression.

With the new system the $predenceMap of PrettyPrinterAbstract contains both
precedence and associativity and there is a new method pPrec() which prints
a node taking precedence and associativity into account.

For simpler usage there are additional function pInfixOp(), pPrefixOp() and
pPostfixOp().

Prints not going through pPrec() do not have any precedence handling (fixing
the closure issue).
 2012-10-31 17:34:06 +01:00
nikic
9e43acee2c Scalar_String::create() -> Scalar_String::parse() 
Directly creating the node isn't necessary anymore, the token only needs
to be parsed. This makes it consistent with the other scalar parsing
methods and removes the need to pass $arguments around.
 2012-10-19 15:17:08 +02:00
nikic
9d8e13b4a9 Fix Switch subnode order 
Not that it makes much of a difference, but could have caused issues with
"out of order" visiting of nodes.
 2012-10-19 14:54:56 +02:00
nikic
af5d288fb3 Add support for expressions in empty (PHP 5.5) 
Apart from the grammar modifications this also renames the Empty subnode
from var to expr. This breaks BC.
 2012-09-07 23:42:01 +02:00
nikic
f6c1ab6657 Adjust list and yield parsing, update prettyprinter 
* nested list()s will now create nested List nodes (instead of just
   nested arrays)
 * yield $k => $v was parsed with key and value swapped. This is now fixed
 * the pretty printer now works with the newly added language constructs
 2012-09-07 23:41:59 +02:00
nikic
4259b44a84 Add support for constant dereferencing (PHP 5.5) 
Examples: "foo"[2], [1, 2, 3][2]
 2012-09-07 23:41:58 +02:00
nikic
417a8bb07e Add support for yield expressions (PHP 5.5) 
This adds a new Yield expression type, with subnodes key and value.
 2012-09-07 23:41:57 +02:00