[cfe-dev] hasDefinition() is false for ClassTemplateSpecializationDecl instances

[Sergey Lyskov via cfe-dev]

	Never mind, i think i figured this out: turned out that ClassTemplateSpecializationDecl will not have definition info if class is not yet instantiated so workaround for this problem is to check if point of instantiation give a valid source location (i.e. ->getPointOfInstantiation().isInvalid() )

	Best,

Sergey.


> On Apr 17, 2016, at 5:16 PM, Sergey Lyskov <sergey.lyskov at gmail.com> wrote:
> 
> Dear Developers,
> 
> 	I am working on source analysis tool using LibTooling which use RecursiveASTVisitor to inspect CXXRecordDecl. This works well but occasionally i am getting 'queried property of class with no definition’ (full error below) while trying to access various CXXRecordDecl properties. I am guessing this because underlying CXXRecordDecl is just a forward declaration (is this correct?) so no records could be accessed. 
> 
> 	So to filter such forward declarations i added check that call CXXRecordDecl::hasDefinition() and avoid inspecting records that have no definition. This seems to work but this check  filter all ClassTemplateSpecializationDecl instances as well because ClassTemplateSpecializationDecl::hasDefinition() return false even for instances that could be inspected.
> 
> 	Is there is a way i can check if instance of ClassTemplateSpecializationDecl has definition and it properties could be queried?
> 
> 	Thanks,
> 
> Sergey. 
> 
> DeclCXX.h:592: clang::CXXRecordDecl::DefinitionData& clang::CXXRecordDecl::data() const: Assertion `DD && "queried property of class with no definition"
> 
>