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 e

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'
]
]);

show more ...

Rewrite namespace handling code

Add a check for disallowed statements between braced namespaces
while at it.

Move Stmt\Namespace_::postprocess() to parser

Make names in the parser more descriptive

And improve the code a tad bit in general.

I left YY2TBLSTATES and YYNLSTATES around, because I don't fully
understand their role in th

Make names in the parser more descriptive

And improve the code a tad bit in general.

I left YY2TBLSTATES and YYNLSTATES around, because I don't fully
understand their role in the action double indexing.

show more ...

Use normal properties instead of static ones

Separate parser code from generated data