Am 04.04.2012 23:04, schrieb Sergiu Ivanov:
In [0] they say that

   It can parse context-sensitive, infinite look-ahead grammars but it
   performs best on predictive (LL[1]) grammars.

Sounds like LL(*), which is going to perform badly on left recursion.

I hear there are ways around this, but they involve modifying the grammar.
Which means the grammar is going to be farther away from the intuitive structure. A parsing expert can work around this, people with other primary skills (such as LaTeX and math experts around here in SymPy) will find this to be very hard to maintain.

From that perspective, I'm +10 for an Earley-style parser :-)

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