Pretty Printer: Fix printing of conversion operator decls and calls.
- Don't emit anything when we encounter a call to a conversion operator.
"bar(a & b)" instead of "bar(a & b.operator int())"
This preserves the semantics and is still idempotent if we print the AST multiple times.
- Properly print declarations of conversion operators.
"explicit operator bool();" instead of "bool operator _Bool();"
PR18776.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@202167
91177308-0d34-0410-b5e6-
96231b3b80d8