[cfe-commits] [PATCH] Fix pretty print when dealing with anonymous structures. PR14316.

[Florent Bruneau]

When I have an expression of the form:
 
 struct blah { 
   struct { 
     struct { 
       int b; 
     }; 
   }; 
 }; 
 
 int foo(const struct blah *b) { 
   return b->b; 
 } 

The expression 'b->b' has the following (correct) AST:

 (ImplicitCastExpr 0x44bc968 'int' <LValueToRValue> 
   (MemberExpr 0x44bc8f0 'int' lvalue .b 0x44899b0 
     (MemberExpr 0x44bc8c0 'struct blah::<anonymous at foo.c:3:9>' lvalue .  0x4489a50 
       (MemberExpr 0x44bc890 'struct blah::<anonymous at foo.c:2:5>' lvalue -> 0x44bc2f0 
         (ImplicitCastExpr 0x44bc878 'union blah *' <LValueToRValue> 
           (DeclRefExpr 0x44bc850 'union blah *' lvalue ParmVar 0x44bc440 'b' 'union blah *'))))))
 
But the pretty printer (and as a consequence clang -cc1 -ast-print foo.c) badly print this as 'b.b' because all the MemberExpr targeting anonymous types are simply ignored. The patch fix that behavior: the arrow/dot notation is printed if the base of the expression is not anonymous.
--- 
 lib/AST/StmtPrinter.cpp |   10 +++++++++- 
 1 file changed, 9 insertions(+), 1 deletion(-) 

 
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Florent Bruneau