[antlr-interest] "Best practice" for contructing AST

[John D. Mitchell]

>>>>> "Paul" == Paul J Lucas <pauljlucas at mac.com> writes:
[...]

> 	Method 2 differs from Method 1 in that there's no ATTRIBUTE_LIST.
> It's not strictly needed since one "knows" that attibutes always come
> before element content.

> 	But does eliding ATTRIBUTE_LIST generally make things easier or
> harder?

IME, it's almost always better to have the list.  By pushing down the
variability (i.e., elements may have a variable number of attributes) one
level, everything at the element level is fixed.  That makes it easy, fast,
and reliable to get any of the fields -- e.g., the element's content would
be the third child.

Hope this helps,
		John



 
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