https://llvm.org/bugs/show_bug.cgi?id=26722
Bug ID: 26722
Summary: Requesting an additional diagnostic note on invalid
casts
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: unassignedclangb...@nondot.org
Reporter: yunzhong_...@playstation.sony.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
I have the following two test cases.
//------ test1.cc
class base {
virtual void func() { }
};
class Derived;
void test(Derived *x) {
base *y = x; // error here about invalid cast
}
//------ end test1.cc
//------ test2.cc
class base {
virtual void func() { }
};
class Derived { };
void test(Derived *x) {
base *y = x; // error here about invalid cast
}
//------ end test2.cc
When I compile with clang, I get the same error for both test cases:
error: cannot initialize a variable of type 'base *' with an lvalue of type
'Derived *'
This is a feature request for an additional note that differentiates the
two test cases. For example, maybe
for the first test case,
note: class type 'Derived' is incomplete
And for the second test case,
note: class type 'Derived' is not inheriting from class type 'base'
If I try the same test case on the online compiler at ideone.com, I would
get the note as I described for the first test case.
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