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Postings from September 2001
On Mon, 3 Sep 2001, Nathan Torkington wrote: > > Ok, so one example of a PMC is a Perl string... > > If you grok vtables, think of a PMC as the thing a vtable hangs off. > > Another way to think of it is that a PMC is an object. To the outside > (the interpreter that is manipulating data values) its contents are > opaque. All you can do is call methods (vtable entries) on it. > > So if you have an object/PMC that implements a string, the "length" > method/vtable-entry will return the length of the string. An > object/PMC that implements an array, the "length" method/vtable-entry > will return the number of things in the array. I think I understand this. What I don't understand is how this relates to the next section about Parrot's special relationship with strings. If Parrot has a "string" type and string handling functions, why use a PMC to implement a string? What does it mean to have a PMC that "implements a string" and also have a "string type" in Parrot? -samThread Previous | Thread Next