[analyzer] NFC: Document that we support implicit argument constructors.
The change in the AST in r338135 caused us to accidentally support
inlining constructors of operator implicit arguments. Previously they were
hard to support because they were treated as arguments in expressions
but not in declarations, but now they can be transparently treated as
simple temporaries.
Add tests and comments to explain how it now works.
Differential Revision: https://reviews.llvm.org/D49627
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@339087
91177308-0d34-0410-b5e6-
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projects / clang / commit