Add support for object type

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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Fix some typing issues

Adjust the end attributes on the stack as well

Make Expr\Error nodes empty

Resolves issue #359.

Improve doc comments

Use closures instead of methods for semantic actions

The dispatch using $this->{'reduceRule' . $rule}() is very expensive
because it involves
* One allocation when converting $rule

Use closures instead of methods for semantic actions

The dispatch using $this->{'reduceRule' . $rule}() is very expensive
because it involves
* One allocation when converting $rule to a string
* Another allocation when concatenating the two strings
* Lowercasing during the method call
* Various uncached method checks, e.g. visibility.

Using an array of closures for semantic action dispatch is
significantly more efficient.

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Use local var for $stackPos

We're accessing $this->stackPos a lot, and property accesses are
much more expensive than local variable acesses. Its cheaper to
use a local var and pass

Use local var for $stackPos

We're accessing $this->stackPos a lot, and property accesses are
much more expensive than local variable acesses. Its cheaper to
use a local var and pass it as an argument to semantic actions.

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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

Drop attribute poisoning in parser

Fix issues reported by psalm

Drop useNopStatements option

Drop last vestiges of consistent var mode flag

Enforce useConsistentVariableNames

Update doc comments to be more specific

Now $stmts arrays really only contains Stmt nodes.

Make useExpressionStatement only supported mode

Add first shot at format preserving pretty printer

Add expression statement mode

Add useConsistentVariableNodes mode

The parameter case is a bit weird, because the subnode is called
"name" here, rather than "var". Nothing we can do about that in
this version thou

Add useConsistentVariableNodes mode

The parameter case is a bit weird, because the subnode is called
"name" here, rather than "var". Nothing we can do about that in
this version though.

The two parser options might be merged. I've kept it separate,
because I think this variable representation should become the
default (or even only representation) in the future, while I'm
less sure about the Identifier thing.

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Represent builtin types using Identifier as well

Add useIdentifierNodes mode to parser

In this mode non-namespaced names that are currently represented
using strings will be represented using Identifier nodes instead.
Identifier no

Add useIdentifierNodes mode to parser

In this mode non-namespaced names that are currently represented
using strings will be represented using Identifier nodes instead.
Identifier nodes have a string $name subnode and coerce to string.

This allows preserving attributes and in particular location
information on identifiers.

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Add support for negative interpolated offsets

A late addition to PHP 7.1 which I missed.

Parse 0 in "$a[0]" as LNumber (#325)