https://bugs.kde.org/show_bug.cgi?id=384580
Bug ID: 384580
Summary: Alias template parameter confusion
Product: kdevelop
Version: git master
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Language Support: CPP (Clang-based)
Assignee: kdevelop-bugs-n...@kde.org
Reporter: zarathustra.zoroas...@gmail.com
Target Milestone: ---
Remember yesteryear's https://bugs.kde.org/show_bug.cgi?id=368067 ? A new
variant of this bug exists in clang releases since ~3.8 with regard to alias
templates. The following code:
class Foo;
template<typename Foo>
using Bar = Foo;
class Foo
{
void foo();
};
void Foo::foo() { }
…now results in the same parameter confusion as in the referenced bug, I've
opened this as a new bug only because the cause is novel. Currently, in
kdevelop's clang support, the switch() default in visitCursor() in builder.cpp
recurses into a given cursor. In Clang 3.8, a cursor was explicitly exposed for
template type aliases (CXCursor_TypeAliasTemplateDecl), the children of this
cursor consist of, first, a CXCursor_TemplateTypeParameter, and
CXCursor_TypeAliasDecl. When one recurses into CXCursor_TypeAliasTemplateDecl,
one ends up adding a use for whatever template parameter is specified in the
alias. Additionally, formal template type alias use-tracking is broken owing to
a mismatch between the cursor stored for the TypeAliasDecl and its parent.
It is worth noting that I'm currently trying to patch my issue with alias
template tracking and such a fix would likely also resolve this bug, as I
assume it just means hooking CXCursor_TypeAliasTemplateDecl into kdevelop's
clang machinery.
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