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From: Ethan Gardener <eekee57@fastmail.fm>
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Date: Mon, 17 Sep 2018 11:17:10 +0100
Subject: Re: [9front] bug: cpp(1) token pasting failure
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X-Bullshit: responsive SSL callback wrapper control 

On Sun, Sep 16, 2018, at 9:54 PM, Nick Owens wrote:
>  DEF_ASM(jo #undef DEF};static const char keywords[] = #define DEF(id,
> str) str "\0" DEF_ASMTEST(j,)#undef DEF;int main(int argc, char
> *argv[]){        return -1;}#line 23

i thought you could only use preprocessor directives at the start of a line.  i'm pretty sure i learned that particular point, but it was probably in the 90s.