ll-grammar

Which contemporary computer languages are LL(1)?

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I think I’d be tempted to flag that Wikipedia quote with [citation needed]; the assumptions are, at least, questionable. For example, there are a large number of compiler-construction tools based on yacc which make it extremely easy, in practice, to construct a parser using the more powerful (and equally fast) LALR algorithm, and some also … Read more

What advantages do LL parsers have over LR parsers?

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GLR is great if you want a parse tree/forest and don’t mind black boxes. It lets you type in whatever CFG you want at the cost of checking for ambiguities at parse time via exhaustive testing, instead of resolving LR/LALR conflicts statically. Some say that’s a good trade-off. Ira Baxter’s DMS tool or Elkhound, which … Read more

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