[cfe-dev] PPCallbacks - If function param SourceRange returns whole file

[fdart via cfe-dev]

Hi,

In my libtooling project I have a class implementing the PPCallbacks
interface to get that information.  When the "If" function is triggered, I
am passed a condition range.  I expect that would be whatever followed "#if
" on that line.

To extract the raw source text information as a string, I followed the
advice of the below thread and have the below implementation.  The string
"source" I retrieve contains the entire source of the file, after the "#if
" statement.  Why is that?  How can I get only the information for the text
on the line following the "#if "?  I'm using Clang 8.0.0.

http://clang-developers.42468.n3.nabble.com/source-code-string-from-SourceRange-td4032732.html


 void PreprocessorInfoListener::If(SourceLocation sourceLoc, SourceRange
conditionRange, PPCallbacks::ConditionValueKind conditionValue)
{
    LangOptions langOptions;
    llvm::StringRef source =
Lexer::getSourceText(CharSourceRange::getTokenRange(conditionRange),
m_sourceManager, langOptions);
}

Thanks,
Justin
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