How to generate a newline in a cpp macro?

Question

How do I write a cpp macro which expands to include newlines?

Answer 1

Not quite sure what you're asking here. Do you want a macro on multiple lines?

#define NEWLINE_MACRO(x) line1 \
line2 \
line3

Additionally, if you would like to include a literal in your macro:

#define NEWLINE_MACRO(x) ##x

what you you put in x will be put in place of ##x, so:

NEWLINE_MACRO( line1 ) // is replaced with line1

This can be helpful for making custom global functions then just need part of the function name changed.

Also:

#define NEWLINE_MACRO(x) #x // stringify x

Will put quotes around x