- Improved performance (can short circuit/not continue when done)
- Backwards compatible because added interfaces
- Now generating the implementation for easier updates
Example from issue:
```php
<?php
#
# Comment
#
$a = 100;
```
The problem with the example from the issue is that `#` is immediately followed by a line break.
And since the rule in the lexer for such comments was changed, this case was handled incorrectly.
```
(('#' ^'[') | '//') any_line* when is_not_comment_end => {
lex.ungetStr("?>")
lex.addFreeFloatingToken(tkn, token.T_COMMENT, lex.ts, lex.te)
};
```
This rule has one problem, it checks two characters at once, first for the match `#`, and
then for the mismatch `[`, which leads to the fact that in the case of an empty comment, the first
matcher will capture `#`, and the second line break (`\n`), which will lead to the fact that `any_line`
matcher will not work and will not increase the line number.
The next rule added is specifically for this case.
```
'#' newline when is_not_comment_end => {
lex.ungetStr("?>")
lex.addFreeFloatingToken(tkn, token.T_COMMENT, lex.ts, lex.te)
};
```
Renamed 'possible_comma' with 'optional_comma' as in PHP-Parser
Replace all 'identifier' with 'identifier_ex' and all 'T_STRING' with 'identifier' as in PHP-Parser
PHP 8 Update
- nullsafe operator (?->)
- Remove (real) cast
- Named arguments
- Remove (unset) cast
- Remove {} access
- match expression
- Union types in type hints and static typehint
- Block catch without variable
- Trailing comma in parameter lists
- throw can be used as an expression
- Concatenation precedence
- Declaring properties in the constructor
- Attributes
- Names in the namespace are treated as a single token
- Trailing comma in closure use list
- Check that ::class on object works
- Deferencable changes and arbitrary expressions in new/instanceof
