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    • Douglas Gregor's avatar
      Add some examples of Fix-it hints to our documentation · 60f3c959
      Douglas Gregor authored 
      llvm-svn: 68210
      60f3c959
    • Douglas Gregor's avatar
      Give Type::getDesugaredType a "for-display" mode that can apply more · 2e0757f3
      Douglas Gregor authored 
      heuristics to determine when it's useful to desugar a type for display
to the user. Introduce two C++-specific heuristics:

  - For a qualified type (like "foo::bar"), only produce a new
    desugred type if desugaring the qualified type ("bar", in this
    case) produces something interesting. For example, if "foo::bar"
    refers to a class named "bar", don't desugar. However, if
    "foo::bar" refers to a typedef of something else, desugar to that
    something else. This gives some useful desugaring such as
    "foo::bar (aka 'int')".
  - Don't desugar class template specialization types like
    "basic_string<char>" down to their underlying "class
    basic_string<char, char_traits<char>, allocator<char>>, etc.";
    it's better just to leave such types alone. 

Update diagnostics.html with some discussion and examples of type
preservation in C++, showing qualified names and class template
specialization types.

llvm-svn: 68207
      2e0757f3
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