[llvm-bugs] [Bug 31814] New: MacroArgs getNumArguments() yields unexpected results: Twice the expected amount

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31814

            Bug ID: 31814
           Summary: MacroArgs getNumArguments() yields unexpected results:
                    Twice the expected amount
           Product: clang
           Version: 3.9
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: sebald.ziegler.maillist at ikolus.de
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Created attachment 17918
  --> https://llvm.org/bugs/attachment.cgi?id=17918&action=edit
clang tool - which applied on the above example results in 4 instead of 2

Context: Writing a new clang tool

When using MacroArgs in this context:

void MacroExpands(const Token &MacroNameTok, const MacroDefinition &MD,
        SourceRange Range, const MacroArgs *Args) {
 ...
}

to iterate over all macro arguments, Args->getNumArguments() yields twice the
expected amount of arguments. When trying to access the additional ones then
the program segfaults.

For this example:

#define MAX(x,y) ((x>y)?x:y)

int main(int argc, char** argv) {
        int a=5;
        int b=7;
        return MAX(a,b);
}

Args->getNumArguments() is 4.

This does not seem to be intended behaviour. Or am I mistaken?

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20170131/9810d84a/attachment.html>