Generate PHP 7 type annotations

Always use Identifier nodes

The parser will now always generate Identifier nodes (for
non-namespaced identifiers). This obsoletes the useIdentifierNodes
parser option.

Node

Always use Identifier nodes

The parser will now always generate Identifier nodes (for
non-namespaced identifiers). This obsoletes the useIdentifierNodes
parser option.

Node constructors still accepts strings and will implicitly create
an Identifier wrapper. Identifier implement __toString(), so that
outside of strict-mode many things continue to work without changes.

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Use null-coalesce operator

Add ClassMethod::isMagic() method

Fix spelling of VISIBILITY_MODIFIER_MASK

Update doc comments after previous comment

Make some of the type annotations more accurate, and complete the
generated doc-comments to be complete (with description and
parameter ann

Update doc comments after previous comment

Make some of the type annotations more accurate, and complete the
generated doc-comments to be complete (with description and
parameter annotations.)

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Add non-void return types

Update doc comments to be more specific

Now $stmts arrays really only contains Stmt nodes.

Drop deprecated $type subnodes

These have been replaced by $flags in 3.0

Add NullableType to types of properties/args that offer it (#323)

Cleanup imports

Thanks PhpStorm :)

Graceful handling for "special" errors

Nearly all special errors are now handled gracefully, i.e. the
parser will be able to continue after encountering them. In some
cases the assoc

Graceful handling for "special" errors

Nearly all special errors are now handled gracefully, i.e. the
parser will be able to continue after encountering them. In some
cases the associated error range has been improved using the new
end attribute stack.

To achieve this the error handling code has been moved out of the
node constructors and into special methods in the parser.

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Rename $type subnode to $flags

Type makes it sound like a type-hint, and on a number of other nodes
$type is used for exactly that. Use $flags to hold modifiers instead.

Fix implicit visibility for properties as well

Also switch to using PPP mask.

Fix public modifier check for ClassMethod node

Fix implicit visibility for properties as well

Also switch to using PPP mask.

Fix public modifier check for ClassMethod node

Fix returnType typehints

Fixes issues #207

Add a FunctionLike interface to Methods, Functions and Closures.

The elements listed above share common elements like parameters, possible return types and bodies.

Drop support for old Node format

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
suppo

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.

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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, ass

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.

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Implicit public should not generate as explicit public

Use "public" visibility when not explicitly given

Fixes issue #143

Guarantee that subnodes are always in the right order