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The following rule should be able to be parsed, but it generates a syntax error:
```
rule
x := !x;
end;
```
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Rules in yacc/bison may contain embedded actions, it's useful when constructing complex grammar.
Do you think we could have this feature in Syntax?
reference: http://dinosaur.compilertools.net/b…
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While converting some grammars I noticed that the `error` for error recovering is not implemented.
Example grammar using error recovery that works with bison:
```
%nonassoc error
%left '(' ')'
…
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Trying to build the grammar from postgresql mentioned here https://github.com/phorward/unicc/issues/22#issuecomment-984550196 it takes a long time to generate the parser and looking at the profile it …
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**Suggestion**
A Lark Earley parser will generate "sppf.png" `if self.debug` is True, as seen in `early.py`:
https://github.com/lark-parser/lark/blob/master/lark/parsers/earley.py - search for "sp…
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Interception of methods in the internal PHP classes is the most complex one, however, it is required for special cases, for example, to intercept `mysql->query()` invocation:
``` php
class MysqliQuer…
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Parser generator for ruby generate code with `_1` and `_2`, which is reserved in latest ruby versions:
Added from ruby 2.7 - https://www.bigbinary.com/blog/ruby-2-7-introduces-numbered-parameters-a…
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**UPDATE**: Fund what it is in the bison manual. This is an [Actions in Mid-Rule](http://dinosaur.compilertools.net/bison/bison_6.html#SEC48).
In the ruby language parser there is a strange construct…
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```
[ 16%] Building CXX object packages/teuchos/remainder/src/CMakeFiles/teuchosremainder.dir/Teuchos_StringToIntMap.cpp.o
cd /work2/00434/eijkhout/trilinos/build-13-4-1-clx-intel-impi/packages/teuc…