FPPP: Convert some checks to assertions

Don't just silently fall back if we receive illegal input.

FPPP: Graceful handling of comment changes

FPPP: Add support for removal from list nodes

Reset origTokens in resetState()

In case one pretty printer is used in both preserving and
non-preserving mode.

FPPP: Support anonymous classes (#432)

This is a huge hack... We temporarily create a new node with the
correct structure and use that for printing.

I think it would be better t

FPPP: Support anonymous classes (#432)

This is a huge hack... We temporarily create a new node with the
correct structure and use that for printing.

I think it would be better to always use a separate node type for
NewAnonClass, rather than using a combination of New and Class,
but this would require some larger changes, as this node type would
have to be both Expr and ClassLike, which is not possible right now,
as the latter is a class rather than an interface...

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FPPP: Support modifier changes (#428)

I decided against introducing a node type for this. In the end it
would require special handling anyway.

FPPP: Check that nodes are nodes in pArray()

FPPP: Consolidate indentation levels

A bit annoying that we have to keep $this->nl always synchronized.

Print comments of inserted statements

Move leading space out of pStmt_Else

Same as previous commit. Also add support for pStmt_If->else
insertion.

Move leading space out of pStmt_ElseIf

This is not part of the elseif itself and as such belongs in the
pStmt_If printer.

FPPP: Support insertion into list subnodes

With some rough edges...

FPPP: Switch pArray() to use node list diffing

Make code more explicit

FPPP: Fall back if comment in list node changes (#420)

Add get{Start,End}{Line,TokenPos,FilePos}() methods

Add Node::getComments() method

Remove leftover property intialization in pretty printer (#416)

Don't continue of searching if a global namespace declaration is found

Extract TokenStream class from pretty printer

Replace noIndent mechanism in pretty printer

Instead store newline with indentation in $nl property and use it
where needed.

The implementation should be changed to compilet ind

Replace noIndent mechanism in pretty printer

Instead store newline with indentation in $nl property and use it
where needed.

The implementation should be changed to compilet indentLevel and
fpIndentLevel, I don't think these need to be kept separate.

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Add strict_types to lib code

[cs] use strict comparison where allowed

[cs] use PHP 5.4 short array, since PHP 7.0 is min version

Simplify ternary operator for PHP7 (#395)