// thus on Fri, 17 Jul 1998 10:31:42 -0700, Tony wrote: > In DG Scripts, it fairly often uses code like (I don't have access to my > code): > typedef struct trig_data; I'm guessing you mean something like typedef struct trig_data trig_data; In simple terms, think of a typedef as a "#define" or an alias. You can replace all instances of "trig_data" with "struct trig_data" > from what I've read, that makes it so I can go "trig_data *blah" and it > works just the same, without the struct. Like I said, you can consider it like a "#define", but only for types. You do not have to use typedef's only for structures, it just so happens that structures are what they are normally used for. > However, now we see stuff like: > trig_data **trg_index; > struct trig_data **trig_index; These are equivalent based upon the typedef above. If you replace the lone trig_data with 'struct trig_data' you'll see how they are the same. Both of these defined a pointer to pointer to a struct trig_data. Normally you would use this to make an array of pointers to struct trig_data. An easy visualization of "a pointer to a pointer" is a 2 dimensional array. This is an over-simplication of the fact. d. +------------------------------------------------------------+ | Ensure that you have read the CircleMUD Mailing List FAQ: | | http://democracy.queensu.ca/~fletcher/Circle/list-faq.html | +------------------------------------------------------------+
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