609 lines
		
	
	
		
			25 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			609 lines
		
	
	
		
			25 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| Version 4.1.1-dev
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| -----------------
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| 
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| Nothing yet.
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| 
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| Version 4.1.0 (2018-10-10)
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| --------------------------
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| 
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| ### Added
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| 
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| * Added support for PHP 7.3 flexible heredoc/nowdoc strings, completing support for PHP 7.3. There
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|   are two caveats for this feature:
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|    * In some rare, pathological cases flexible heredoc/nowdoc strings change the interpretation of
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|      existing doc strings. PHP-Parser will now use the new interpretation.
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|    * Flexible heredoc/nowdoc strings require special support from the lexer. Because this is not
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|      available on PHP versions before 7.3, support has to be emulated. This emulation is not perfect
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|      and some cases which we do not expect to occur in practice (such as flexible doc strings being
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|      nested within each other through abuse of variable-variable interpolation syntax) may not be
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|      recognized correctly.
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| * Added `DONT_TRAVERSER_CURRENT_AND_CHILDREN` to `NodeTraverser` to skip both traversal of child
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|   nodes, and prevent subsequent visitors from visiting the current node.
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| 
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| Version 4.0.4 (2018-09-18)
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| --------------------------
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| 
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| ### Added
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| 
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| * The following methods have been added to `BuilderFactory`:
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|   * `useTrait()` (fluent builder)
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|   * `traitUseAdaptation()` (fluent builder)
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|   * `useFunction()` (fluent builder)
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|   * `useConst()` (fluent builder)
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|   * `var()`
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|   * `propertyFetch()`
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|   
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| ### Deprecated
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| 
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| * `Builder\Param::setTypeHint()` has been deprecated in favor of the newly introduced
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|   `Builder\Param::setType()`.
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| 
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| Version 4.0.3 (2018-07-15)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed possible undefined offset notice in formatting-preserving printer. (#513)
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| 
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| ### Added
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| 
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| * Improved error recovery inside arrays.
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| * Preserve trailing comment inside classes. **Note:** This change is possibly BC breaking if your
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|   code validates that classes can only contain certain statement types. After this change, classes
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|   can also contain Nop statements, while this was not previously possible. (#509)
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| 
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| Version 4.0.2 (2018-06-03)
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| --------------------------
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| 
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| ### Added
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| 
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| * Improved error recovery inside classes.
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| * Support error recovery for `foreach` without `as`.
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| * Support error recovery for parameters without variable (`function (Type ) {}`).
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| * Support error recovery for functions without body (`function ($foo)`).
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| 
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| Version 4.0.1 (2018-03-25)
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| --------------------------
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| 
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| ### Added
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| 
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| * [PHP 7.3] Added support for trailing commas in function calls.
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| * [PHP 7.3] Added support for by-reference array destructuring. 
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| * Added checks to node traverser to prevent replacing a statement with an expression or vice versa.
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|   This should prevent common mistakes in the implementation of node visitors.
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| * Added the following methods to `BuilderFactory`, to simplify creation of expressions:
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|   * `funcCall()`
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|   * `methodCall()`
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|   * `staticCall()`
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|   * `new()`
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|   * `constFetch()`
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|   * `classConstFetch()`
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| 
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| Version 4.0.0 (2018-02-28)
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| --------------------------
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| 
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| * No significant code changes since the beta 1 release.
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| 
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| Version 4.0.0-beta1 (2018-01-27)
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| --------------------------------
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| 
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| ### Fixed
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| 
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| * In formatting-preserving pretty printer: Fixed indentation when inserting into lists. (#466)
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| 
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| ### Added
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| 
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| * In formatting-preserving pretty printer: Improved formatting of elements inserted into multi-line
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|   arrays.
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| 
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| ### Removed
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| 
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| * The `Autoloader` class has been removed. It is now required to use the Composer autoloader.
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| 
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| Version 4.0.0-alpha3 (2017-12-26)
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| ---------------------------------
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| 
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| ### Fixed
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| 
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| * In the formatting-preserving pretty printer:
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|   * Fixed comment indentation.
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|   * Fixed handling of inline HTML in the fallback case.
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|   * Fixed insertion into list nodes that require creation of a code block.
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| 
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| ### Added
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| 
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| * Added support for inserting at the start of list nodes in formatting-preserving pretty printer.
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| 
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| Version 4.0.0-alpha2 (2017-11-10)
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| ---------------------------------
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| 
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| ### Added
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| 
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| * In the formatting-preserving pretty printer:
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|   * Added support for changing modifiers.
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|   * Added support for anonymous classes.
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|   * Added support for removing from list nodes.
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|   * Improved support for changing comments.
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| * Added start token offsets to comments.
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| 
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| Version 4.0.0-alpha1 (2017-10-18)
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| ---------------------------------
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| 
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| ### Added
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| 
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| * Added experimental support for format-preserving pretty-printing. In this mode formatting will be
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|   preserved for parts of the code which have not been modified.
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| * Added `replaceNodes` option to `NameResolver`, defaulting to true. If this option is disabled,
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|   resolved names will be added as `resolvedName` attributes, instead of replacing the original
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|   names.
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| * Added `NodeFinder` class, which can be used to find nodes based on a callback or class name. This
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|   is a utility to avoid custom node visitor implementations for simple search operations.
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| * Added `ClassMethod::isMagic()` method.
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| * Added `BuilderFactory` methods: `val()` method for creating an AST for a simple value, `concat()`
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|   for creating concatenation trees, `args()` for preparing function arguments.
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| * Added `NameContext` class, which encapsulates the `NameResolver` logic independently of the actual
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|   AST traversal. This facilitates use in other context, such as class names in doc comments.
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|   Additionally it provides an API for getting the shortest representation of a name.
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| * Added `Node::setAttributes()` method.
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| * Added `JsonDecoder`. This allows conversion JSON back into an AST.
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| * Added `Name` methods `toLowerString()` and `isSpecialClassName()`.
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| * Added `Identifier` and `VarLikeIdentifier` nodes, which are used in place of simple strings in
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|   many places.
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| * Added `getComments()`, `getStartLine()`, `getEndLine()`, `getStartTokenPos()`, `getEndTokenPos()`,
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|   `getStartFilePos()` and `getEndFilePos()` methods to `Node`. These provide a more obvious access
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|   point for the already existing attributes of the same name.
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| * Added `ConstExprEvaluator` to evaluate constant expressions to PHP values.
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| * Added `Expr\BinaryOp::getOperatorSigil()`, returning `+` for `Expr\BinaryOp\Plus`, etc.
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| 
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| ### Changed
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| 
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| * Many subnodes that previously held simple strings now use `Identifier` (or `VarLikeIdentifier`)
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|   nodes. Please see the UPGRADE-4.0 file for an exhaustive list of affected nodes and some notes on
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|   possible impact.
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| * Expression statements (`expr;`) are now represented using a `Stmt\Expression` node. Previously
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|   these statements were directly represented as their constituent expression.
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| * The `name` subnode of `Param` has been renamed to `var` and now contains a `Variable` rather than
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|   a plain string.
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| * The `name` subnode of `StaticVar` has been renamed to `var` and now contains a `Variable` rather
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|   than a plain string.
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| * The `var` subnode of `ClosureUse` now contains a `Variable` rather than a plain string.
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| * The `var` subnode of `Catch` now contains a `Variable` rather than a plain string.
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| * The `alias` subnode of `UseUse` is now `null` if no explicit alias is given. As such,
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|   `use Foo\Bar` and `use Foo\Bar as Bar` are now represented differently. The `getAlias()` method
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|   can be used to get the effective alias, even if it is not explicitly given.
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| 
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| ### Removed
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| 
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| * Support for running on PHP 5 and HHVM has been removed. You can however still parse code of old
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|   PHP versions (such as PHP 5.2), while running on PHP 7.
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| * Removed `type` subnode on `Class`, `ClassMethod` and `Property` nodes. Use `flags` instead.
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| * The `ClassConst::isStatic()` method has been removed. Constants cannot have a static modifier.
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| * The `NodeTraverser` no longer accepts `false` as a return value from a `leaveNode()` method.
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|   `NodeTraverser::REMOVE_NODE` should be returned instead.
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| * The `Node::setLine()` method has been removed. If you really need to, you can use `setAttribute()`
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|   instead.
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| * The misspelled `Class_::VISIBILITY_MODIFER_MASK` constant has been dropped in favor of
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|   `Class_::VISIBILITY_MODIFIER_MASK`.
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| * The XML serializer has been removed. As such, the classes `Serializer\XML`, and
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|   `Unserializer\XML`, as well as the interfaces `Serializer` and `Unserializer` no longer exist.
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| * The `BuilderAbstract` class has been removed. It's functionality is moved into `BuilderHelpers`.
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|   However, this is an internal class and should not be used directly.
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| 
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| Version 3.1.5 (2018-02-28)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed duplicate comment assignment in switch statements. (#469)
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| * Improve compatibility with PHP-Scoper. (#477)
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| 
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| Version 3.1.4 (2018-01-25)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed pretty printing of `-(-$x)` and `+(+$x)`. (#459)
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| 
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| Version 3.1.3 (2017-12-26)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Improve compatibility with php-scoper, by supporting prefixed namespaces in
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|   `NodeAbstract::getType()`.
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| 
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| Version 3.1.2 (2017-11-04)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Comments on empty blocks are now preserved on a `Stmt\Nop` node. (#382)
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| 
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| ### Added
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| 
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| * Added `kind` attribute for `Stmt\Namespace_` node, which is one of `KIND_SEMICOLON` or
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|   `KIND_BRACED`. (#417)
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| * Added `setDocComment()` method to namespace builder. (#437)
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| 
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| Version 3.1.1 (2017-09-02)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed syntax error on comment after brace-style namespace declaration. (#412)
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| * Added support for TraitUse statements in trait builder. (#413)
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| 
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| Version 3.1.0 (2017-07-28)
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| --------------------------
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| 
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| ### Added
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| 
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| * [PHP 7.2] Added support for trailing comma in group use statements.
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| * [PHP 7.2] Added support for `object` type. This means `object` types will now be represented as a
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|   builtin type (a simple `"object"` string), rather than a class `Name`.
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| 
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| ### Fixed
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| 
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| * Floating-point numbers are now printed correctly if the LC_NUMERIC locale uses a comma as decimal
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|   separator.
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| 
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| ### Changed
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| 
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| * `Name::$parts` is no longer deprecated.
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| 
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| Version 3.0.6 (2017-06-28)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed the spelling of `Class_::VISIBILITY_MODIFIER_MASK`. The previous spelling of
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|   `Class_::VISIBILITY_MODIFER_MASK` is preserved for backwards compatibility.
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| * The pretty printing will now preserve comments inside array literals and function calls by
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|   printing the array items / function arguments on separate lines. Array literals and functions that
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|   do not contain comments are not affected.
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| 
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| ### Added
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| 
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| * Added `Builder\Param::makeVariadic()`.
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| 
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| ### Deprecated
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| 
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| * The `Node::setLine()` method has been deprecated.
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| 
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| Version 3.0.5 (2017-03-05)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Name resolution of `NullableType`s is now performed earlier, so that a fully resolved signature is
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|   available when a function is entered. (#360)
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| * `Error` nodes are now considered empty, while previously they extended until the token where the
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|   error occurred. This made some nodes larger than expected. (#359)
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| * Fixed notices being thrown during error recovery in some situations. (#362)
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| 
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| Version 3.0.4 (2017-02-10)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed some extensibility issues in pretty printer (`pUseType()` is now public and `pPrec()` calls
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|   into `p()`, instead of directly dispatching to the type-specific printing method).
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| * Fixed notice in `bin/php-parse` script.
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| 
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| ### Added
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| 
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| * Error recovery from missing semicolons is now supported in more cases.
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| * Error recovery from trailing commas in positions where PHP does not support them is now supported.
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| 
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| Version 3.0.3 (2017-02-03)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * In `"$foo[0]"` the `0` is now parsed as an `LNumber` rather than `String`. (#325)
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| * Ensure integers and floats are always pretty printed preserving semantics, even if the particular
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|   value can only be manually constructed.
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| * Throw a `LogicException` when trying to pretty-print an `Error` node. Previously this resulted in
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|   an undefined method exception or fatal error.
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| 
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| ### Added
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| 
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| * [PHP 7.1] Added support for negative interpolated offsets: `"$foo[-1]"`
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| * Added `preserveOriginalNames` option to `NameResolver`. If this option is enabled, an
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|   `originalName` attribute, containing the unresolved name, will be added to each resolved name.
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| * Added `php-parse --with-positions` option, which dumps nodes with position information.
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| 
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| ### Deprecated
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| 
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| * The XML serializer has been deprecated. In particular, the classes `Serializer\XML`,
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|   `Unserializer\XML`, as well as the interfaces `Serializer` and `Unserializer` are deprecated.
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| 
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| Version 3.0.2 (2016-12-06)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed name resolution of nullable types. (#324)
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| * Fixed pretty-printing of nullable types.
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| 
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| Version 3.0.1 (2016-12-01)
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| --------------------------
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| 
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| ### Fixed
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| 
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| * Fixed handling of nested `list()`s: If the nested list was unkeyed, it was directly included in
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|   the list items. If it was keyed, it was wrapped in `ArrayItem`. Now nested `List_` nodes are
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|   always wrapped in `ArrayItem`s. (#321)
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| 
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| Version 3.0.0 (2016-11-30)
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| --------------------------
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| 
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| ### Added
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| 
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| * Added support for dumping node positions in the NodeDumper through the `dumpPositions` option.
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| * Added error recovery support for `$`, `new`, `Foo::`.
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| 
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| Version 3.0.0-beta2 (2016-10-29)
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| --------------------------------
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| 
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| This release primarily improves our support for error recovery.
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| 
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| ### Added
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| 
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| * Added `Node::setDocComment()` method.
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| * Added `Error::getMessageWithColumnInfo()` method.
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| * Added support for recovery from lexer errors.
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| * Added support for recovering from "special" errors (i.e. non-syntax parse errors).
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| * Added precise location information for lexer errors.
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| * Added `ErrorHandler` interface, and `ErrorHandler\Throwing` and `ErrorHandler\Collecting` as
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|   specific implementations. These provide a general mechanism for handling error recovery.
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| * Added optional `ErrorHandler` argument to `Parser::parse()`, `Lexer::startLexing()` and
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|   `NameResolver::__construct()`.
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| * The `NameResolver` now adds a `namespacedName` attribute on name nodes that cannot be statically
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|   resolved (unqualified unaliased function or constant names in namespaces).
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| 
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| ### Fixed
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| 
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| * Fixed attribute assignment for `GroupUse` prefix and variables in interpolated strings.
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| 
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| ### Changed
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| 
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| * The constants on `NameTraverserInterface` have been moved into the `NameTraverser` class.
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| * Due to the error handling changes, the `Parser` interface and `Lexer` API have changed.
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| * The emulative lexer now directly postprocesses tokens, instead of using `~__EMU__~` sequences.
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|   This changes the protected API of the lexer.
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| * The `Name::slice()` method now returns `null` for empty slices, previously `new Name([])` was
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|   used. `Name::concat()` now also supports concatenation with `null`.
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| 
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| ### Removed
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| 
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| * Removed `Name::append()` and `Name::prepend()`. These mutable methods have been superseded by
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|   the immutable `Name::concat()`.
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| * Removed `Error::getRawLine()` and `Error::setRawLine()`. These methods have been superseded by
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|   `Error::getStartLine()` and `Error::setStartLine()`.
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| * Removed support for node cloning in the `NodeTraverser`.
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| * Removed `$separator` argument from `Name::toString()`.
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| * Removed `throw_on_error` parser option and `Parser::getErrors()` method. Use the `ErrorHandler`
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|   mechanism instead.
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| 
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| Version 3.0.0-beta1 (2016-09-16)
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| --------------------------------
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| 
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| ### Added
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| 
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| * [7.1] Function/method and parameter builders now support PHP 7.1 type hints (void, iterable and
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|   nullable types).
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| * Nodes and Comments now implement `JsonSerializable`. The node kind is stored in a `nodeType`
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|   property.
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| * The `InlineHTML` node now has an `hasLeadingNewline` attribute, that specifies whether the
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|   preceding closing tag contained a newline. The pretty printer honors this attribute.
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| * Partial parsing of `$obj->` (with missing property name) is now supported in error recovery mode.
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| * The error recovery mode is now exposed in the `php-parse` script through the `--with-recovery`
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|   or `-r` flags.
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| 
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| The following changes are also part of PHP-Parser 2.1.1:
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| 
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| * The PHP 7 parser will now generate a parse error for `$var =& new Obj` assignments.
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| * Comments on free-standing code blocks will now be retained as comments on the first statement in
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|   the code block.
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| 
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| Version 3.0.0-alpha1 (2016-07-25)
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| ---------------------------------
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| 
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| ### Added
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| 
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| * [7.1] Added support for `void` and `iterable` types. These will now be represented as strings
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|   (instead of `Name` instances) similar to other builtin types.
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| * [7.1] Added support for class constant visibility. The `ClassConst` node now has a `flags` subnode
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|   holding the visibility modifier, as well as `isPublic()`, `isProtected()` and `isPrivate()`
 | |
|   methods. The constructor changed to accept the additional subnode.
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| * [7.1] Added support for nullable types. These are represented using a new `NullableType` node
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|   with a single `type` subnode.
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| * [7.1] Added support for short array destructuring syntax. This means that `Array` nodes may now
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|   appear as the left-hand-side of assignments and foreach value targets. Additionally the array
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|   items may now contain `null` values if elements are skipped.
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| * [7.1] Added support for keys in list() destructuring. The `List` subnode `vars` has been renamed
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|   to `items` and now contains `ArrayItem`s instead of plain variables.
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| * [7.1] Added support for multi-catch. The `Catch` subnode `type` has been renamed to `types` and
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|   is now an array of `Name`s.
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| * `Name::slice()` now supports lengths and negative offsets. This brings it in line with
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|   `array_slice()` functionality.
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| 
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| ### Changed
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| 
 | |
| Due to PHP 7.1 support additions described above, the node structure changed as follows:
 | |
| 
 | |
| * `void` and `iterable` types are now stored as strings if the PHP 7 parser is used.
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| * The `ClassConst` constructor changed to accept an additional `flags` subnode.
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| * The `Array` subnode `items` may now contain `null` elements (destructuring).
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| * The `List` subnode `vars` has been renamed to `items` and now contains `ArrayItem`s instead of
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|   plain variables.
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| * The `Catch` subnode `type` has been renamed to `types` and is now an array of `Name`s.
 | |
| 
 | |
| Additionally the following changes were made:
 | |
| 
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| * The `type` subnode on `Class`, `ClassMethod` and `Property` has been renamed to `flags`. The
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|   `type` subnode has retained for backwards compatibility and is populated to the same value as
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|   `flags`. However, writes to `type` will not update `flags`.
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| * The `TryCatch` subnode `finallyStmts` has been replaced with a `finally` subnode that holds an
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|   explicit `Finally` node. This allows for more accurate attribute assignment.
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| * The `Trait` constructor now has the same form as the `Class` and `Interface` constructors: It
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|   takes an array of subnodes. Unlike classes/interfaces, traits can only have a `stmts` subnode.
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| * The `NodeDumper` now prints class/method/property/constant modifiers, as well as the include and
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|   use type in a textual representation, instead of only showing the number.
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| * All methods on `PrettyPrinter\Standard` are now protected. Previously most of them were public.
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| 
 | |
| ### Removed
 | |
| 
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| * Removed support for running on PHP 5.4. It is however still possible to parse PHP 5.2-5.4 code
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|   while running on a newer version.
 | |
| * The deprecated `Comment::setLine()` and `Comment::setText()` methods have been removed.
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| * The deprecated `Name::set()`, `Name::setFirst()` and `Name::setLast()` methods have been removed.
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| 
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| Version 2.1.1 (2016-09-16)
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| --------------------------
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| 
 | |
| ### Changed
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| 
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| * The pretty printer will now escape all control characters in the range `\x00-\x1F` inside double
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|   quoted strings. If no special escape sequence is available, an octal escape will be used.
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| * The quality of the error recovery has been improved. In particular unterminated expressions should
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|   be handled more gracefully.
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| * The PHP 7 parser will now generate a parse error for `$var =& new Obj` assignments.
 | |
| * Comments on free-standing code blocks will no be retained as comments on the first statement in
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|   the code block.
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| 
 | |
| Version 2.1.0 (2016-04-19)
 | |
| --------------------------
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| 
 | |
| ### Fixed
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| 
 | |
| * Properly support `B""` strings (with uppercase `B`) in a number of places.
 | |
| * Fixed reformatting of indented parts in a certain non-standard comment style.
 | |
| 
 | |
| ### Added
 | |
| 
 | |
| * Added `dumpComments` option to node dumper, to enable dumping of comments associated with nodes.
 | |
| * Added `Stmt\Nop` node, that is used to collect comments located at the end of a block or at the
 | |
|   end of a file (without a following node with which they could otherwise be associated).
 | |
| * Added `kind` attribute to `Expr\Exit` to distinguish between `exit` and `die`.
 | |
| * Added `kind` attribute to `Scalar\LNumber` to distinguish between decimal, binary, octal and
 | |
|   hexadecimal numbers.
 | |
| * Added `kind` attribute to `Expr\Array` to distinguish between `array()` and `[]`.
 | |
| * Added `kind` attribute to `Scalar\String` and `Scalar\Encapsed` to distinguish between
 | |
|   single-quoted, double-quoted, heredoc and nowdoc string.
 | |
| * Added `docLabel` attribute to `Scalar\String` and `Scalar\Encapsed`, if it is a heredoc or
 | |
|   nowdoc string.
 | |
| * Added start file offset information to `Comment` nodes.
 | |
| * Added `setReturnType()` method to function and method builders.
 | |
| * Added `-h` and `--help` options to `php-parse` script.
 | |
| 
 | |
| ### Changed
 | |
| 
 | |
| * Invalid octal literals now throw a parse error in PHP 7 mode.
 | |
| * The pretty printer takes all the new attributes mentioned in the previous section into account.
 | |
| * The protected `AbstractPrettyPrinter::pComments()` method no longer returns a trailing newline.
 | |
| * The bundled autoloader supports library files being stored in a different directory than
 | |
|   `PhpParser` for easier downstream distribution.
 | |
| 
 | |
| ### Deprecated
 | |
| 
 | |
| * The `Comment::setLine()` and `Comment::setText()` methods have been deprecated. Construct new
 | |
|   objects instead.
 | |
| 
 | |
| ### Removed
 | |
| 
 | |
| * The internal (but public) method `Scalar\LNumber::parse()` has been removed. A non-internal
 | |
|   `LNumber::fromString()` method has been added instead.
 | |
| 
 | |
| Version 2.0.1 (2016-02-28)
 | |
| --------------------------
 | |
| 
 | |
| ### Fixed
 | |
| 
 | |
| * `declare() {}` and `declare();` are not semantically equivalent and will now result in different
 | |
|   ASTs. The format case will have an empty `stmts` array, while the latter will set `stmts` to
 | |
|   `null`.
 | |
| * Magic constants are now supported as semi-reserved keywords.
 | |
| * A shebang line like `#!/usr/bin/env php` is now allowed at the start of a namespaced file.
 | |
|   Previously this generated an exception.
 | |
| * The `prettyPrintFile()` method will not strip a trailing `?>` from the raw data that follows a
 | |
|   `__halt_compiler()` statement.
 | |
| * The `prettyPrintFile()` method will not strip an opening `<?php` if the file starts with a
 | |
|   comment followed by InlineHTML.
 | |
| 
 | |
| Version 2.0.0 (2015-12-04)
 | |
| --------------------------
 | |
| 
 | |
| ### Changed
 | |
| 
 | |
| * String parts of encapsed strings are now represented using `Scalar\EncapsStringPart` nodes.
 | |
|   Previously raw strings were used. This affects the `parts` child of `Scalar\Encaps` and
 | |
|   `Expr\ShellExec`. The change has been done to allow assignment of attributes to encapsed string
 | |
|   parts.
 | |
| 
 | |
| Version 2.0.0-beta1 (2015-10-21)
 | |
| --------------------------------
 | |
| 
 | |
| ### Fixed
 | |
| 
 | |
| * Fixed issue with too many newlines being stripped at the end of heredoc/nowdoc strings in some
 | |
|   cases. (#227)
 | |
| 
 | |
| ### Changed
 | |
| 
 | |
| * Update group use support to be in line with recent PHP 7.0 builds.
 | |
| * Renamed `php-parse.php` to `php-parse` and registered it as a composer bin.
 | |
| * Use composer PSR-4 autoloader instead of custom autoloader.
 | |
| * Specify phpunit as a dev dependency.
 | |
| 
 | |
| ### Added
 | |
| 
 | |
| * Added `shortArraySyntax` option to pretty printer, to print all arrays using short syntax.
 | |
| 
 | |
| Version 2.0.0-alpha1 (2015-07-14)
 | |
| ---------------------------------
 | |
| 
 | |
| A more detailed description of backwards incompatible changes can be found in the
 | |
| [upgrading guide](UPGRADE-2.0.md).
 | |
| 
 | |
| ### Removed
 | |
| 
 | |
| * Removed support for running on PHP 5.3. It is however still possible to parse PHP 5.2 and PHP 5.3
 | |
|   code while running on a newer version.
 | |
| * Removed legacy class name aliases. This includes the old non-namespaced class names and the old
 | |
|   names for classes that were renamed for PHP 7 compatibility.
 | |
| * Removed support for legacy node format. All nodes must have a `getSubNodeNames()` method now.
 | |
| 
 | |
| ### Added
 | |
| 
 | |
| * Added support for remaining PHP 7 features that were not present in 1.x:
 | |
|   * Group use declarations. These are represented using `Stmt\GroupUse` nodes. Furthermore a `type`
 | |
|     attribute was added to `Stmt\UseUse` to handle mixed group use declarations.
 | |
|   * Uniform variable syntax.
 | |
|   * Generalized yield operator.
 | |
|   * Scalar type declarations. These are presented using `'bool'`, `'int'`, `'float'` and `'string'`
 | |
|     as the type. The PHP 5 parser also accepts these, however they'll be `Name` instances there.
 | |
|   * Unicode escape sequences.
 | |
| * Added `PhpParser\ParserFactory` class, which should be used to create parser instances.
 | |
| * Added `Name::concat()` which concatenates two names.
 | |
| * Added `Name->slice()` which takes a subslice of a name.
 | |
| 
 | |
| ### Changed
 | |
| 
 | |
| * `PhpParser\Parser` is now an interface, implemented by `Parser\Php5`, `Parser\Php7` and
 | |
|   `Parser\Multiple`. The `Multiple` parser will try multiple parsers, until one succeeds.
 | |
| * Token constants are now defined on `PhpParser\Parser\Tokens` rather than `PhpParser\Parser`.
 | |
| * The `Name->set()`, `Name->append()`, `Name->prepend()` and `Name->setFirst()` methods are
 | |
|   deprecated in favor of `Name::concat()` and `Name->slice()`.
 | |
| * The `NodeTraverser` no longer clones nodes by default. The old behavior can be restored by
 | |
|   passing `true` to the constructor.
 | |
| * The constructor for `Scalar` nodes no longer has a default value. E.g. `new LNumber()` should now
 | |
|   be written as `new LNumber(0)`.
 | |
| 
 | |
| ---
 | |
| 
 | |
| **This changelog only includes changes from the 2.0 series. For older changes see the
 | |
| [1.x series changelog](https://github.com/nikic/PHP-Parser/blob/1.x/CHANGELOG.md) and the
 | |
| [0.9 series changelog](https://github.com/nikic/PHP-Parser/blob/0.9/CHANGELOG.md).**
 | 
