[LLVMdev] lit: deprecating trailing \ in RUN lines

[Alp Toker]

On 10/12/2013 21:43, Caldarale, Charles R wrote:
>> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
>> On Behalf Of Alp Toker
>> Subject: Re: [LLVMdev] lit: deprecating trailing \ in RUN lines
>> //\
>> int x=0;
>> int x=0;
>> $ gcc-4.9 -fsyntax-only f.c
> Try gcc with -Wall, and you'll see the appropriate warning.  Also try the MS compiler after removing the trailing space after the backslash; I don't have one available to play with, so I don't know if it makes any difference.

Exactly. EDG and MSVC parse this one way, and gcc/clang do it another 
way depending on various factors like whitespace.

It may be a bug like Jim says but to me the EDG/MSVC handling is closer 
to the spec. Not a big deal either way.

For directives in a C/C++ test suite to rely on something contentious 
like trailing newlines that have a dual meaning depending on whether 
they're being parsed by the compiler or the testing tool is problematic 
though.

Alp.



>
>   - Chuck
>

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