Added "isExact" field to FloatingLiteral.  This flag indicates whether or not
the APFloat representing the parsed literal can represent the literal value
exactly.  This is useful when performing various semantic checks on the code,
and issuing appropriate warnings to users.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44423 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed