On Oct 18, 2010, at 8:54 AM, Arvid Ephraim Picciani wrote:
> On 09/23/2010 11:16 PM, ext Greg Clayton wrote:
>> It currently isn't in there, though it could easily be added. We should
>> probably add it as:
>>
>> class SBValue {
>> ...
>>
>> SBValue Cast (SBType type);
>> };
>>
>
> tried doing that, unfortunately SBType is not actually a lldb_private::Type,
> so i don't see how i should use as actual type in Value. This whole clang
> AST stuff is just magic to me, and i dont know what to do with it in the
> context of casting.
The SBType and SBTypeList stuff hasn't really been fleshed out or used a lot
yet and it does need some work.
The idea would be (and this is not how it currently is) is you would search for
types by name:
SBValue value = ...
SBTarget target ...
SBTypeList type_list;
uint32_t max_matches = 1;
size_t n = target.FindTypes ("size_t", type_list, max_matches);
if (n)
{
SBType sb_type (type_list.GetTypeAtIndex (0));
value.Cast (sb_type);
}
After looking at the code, nothing is really trying to return or fill in
anything valid in the SBType and SBTypeList classes.
Like you said, I need to make SBType backed by a lldb::TypeSP like all the
other classes.
The clang type system is large and complex, but the nice thing is with just an
AST pointer and a type pointer (which is an opaque pointer that can be turned
back into a clang::QualType), we can get all of the information out of a type:
- name
- size
- alignment
- num children
- what the type of each of the children are
- much more
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