Re: Syntax diagram driven parser

"Paul Nicholls" <phantom@southcom.com.au> schreibt:


>I think that developing a language using syntax diagrams instead of BNF or
>lex and yacc is great!.


Perhaps you know the "railroad" diagrams of the Pascal syntax. In Delphi this
representation is no longer used, since the actual grammar would require a 3D
view of those diagrams, with crossing rails without interconnections.


A graph can be very complex, perhaps recursive, and I do not see a general
benefit from using such unrestricted graphs, as opposed to other unrestricted
representations of a grammar.


2D Graphs may be useful to represent *conforming* grammars in a more
comprehensible way, but...


DoDi

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