Re: [Nasm-devel] [PATCH 1/6] AVX-512: Handle curly braces in multi-line macro parameters

[anonymous c. <nas...@us...>]

> Multi-line macro uses curly braces for enclosing a parameter
> containing comma(s). Passing curly braces as a part of a parameter
> which is already enclosed with braces confuses the macro expander.
>
> Escape character '\' is prefixed in this case.
> e.g.) mmacro {1,2,3}, {4,\{5,6\}}
>       mmacro gets 2 parameters of '1,2,3' and '4,{5,6}'
>
> Signed-off-by: Jin Kyu Song <jin...@in...>

Yes, curly braces inside mmac params should be handled properly.

But no, you really do not want to introduce backslash escaping -- it
breaks existing code that has backslashes in mmac params.

Also, there is no need to mess around with the curly brace code of
the preprocessor when it comes to AVX-512 -- the preprocessor has
no concept of {xxx} modifiers; from its perspective that's just a curly
brace, followed by xxx, followed by another curly brace.

Only the (assembler's) parser needs to understand {xxx} modifiers,
and it's really trivial to handle them there.