tree 28f78b0fe61c0b7a80cf3ccf0d1c39a884986120
parent 36c35ba0aca641e60e5dbee8efbc620c08b9bd61
author Douglas Gregor <dgregor@apple.com> 1268716839 +0000
committer Douglas Gregor <dgregor@apple.com> 1268716839 +0000

Introduce optional "Invalid" parameters to routines that invoke the
SourceManager's getBuffer() and, therefore, could fail, along with
Preprocessor::getSpelling(). Use the Invalid parameters in the literal
parsers (string, floating point, integral, character) to make them
robust against errors that stem from, e.g., PCH files that are not
consistent with the underlying file system.

I still need to audit every use caller to all of these routines, to
determine which ones need specific handling of error conditions.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98608 91177308-0d34-0410-b5e6-96231b3b80d8