tree a03f423533e8e714dacd90d133e4e72f9edd81b5
parent cabeeed9cc2bfca73e3d629fd263e697164aa453
author Douglas Gregor <dgregor@apple.com> 1224632632 +0000
committer Douglas Gregor <dgregor@apple.com> 1224632632 +0000

Initial step toward supporting qualification conversions (C++ 4.4).

Changes:
  - Sema::IsQualificationConversion determines whether we have a qualification
    conversion.
  - Sema::CheckSingleAssignment constraints now follows the C++ rules in C++,
    performing an implicit conversion from the right-hand side to the type of
    the left-hand side rather than checking based on the C notion of 
    "compatibility". We now rely on the implicit-conversion code to
    determine whether the conversion can happen or
    not. Sema::TryCopyInitialization has an ugly reference-related
    hack to cope with the initialization of references, for now.
  - When building DeclRefExprs, strip away the reference type, since
    there are no expressions whose type is a reference. We'll need to
    do this throughout Sema.
  - Expr::isLvalue now permits functions to be lvalues in C++ (but not
  in C).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57935 91177308-0d34-0410-b5e6-96231b3b80d8