Node:Comments, Next:Symbol Intro, Previous:Whitespace, Up:Syntax
There are two ways of rendering comments to
as. In both
cases the comment is equivalent to one space.
/* through the next
*/ is a comment.
This means you may not nest these comments.
/* The only way to include a newline ('\n') in a comment is to use this sort of comment. */ /* This sort of comment does not nest. */
Anything from the line comment character to the next newline
is considered a comment and is ignored. The line comment character is
; for the AMD 29K family;
; on the ARC;
@ on the ARM;
; for the H8/300 family;
! for the H8/500 family;
; for the HPPA;
# on the i386 and x86-64;
# on the i960;
; for the PDP-11;
; for picoJava;
; for Motorola PowerPC;
! for the Hitachi SH;
! on the SPARC;
# on the m32r;
| on the 680x0;
# on the 68HC11 and 68HC12;
; on the M880x0;
# on the Vax;
! for the Z8000;
# on the V850;
see Machine Dependencies.
On some machines there are two different line comment characters. One character only begins a comment if it is the first non-whitespace character on a line, while the other always begins a comment.
The V850 assembler also supports a double dash as starting a comment that extends to the end of the line.
To be compatible with past assemblers, lines that begin with
# have a
special interpretation. Following the
# should be an absolute
expression (see Expressions): the logical line number of the next
line. Then a string (see Strings) is allowed: if present it is a
new logical file name. The rest of the line, if any, should be whitespace.
If the first non-whitespace characters on the line are not numeric,
the line is ignored. (Just like a comment.)
# This is an ordinary comment. # 42-6 "new_file_name" # New logical file name # This is logical line # 36.This feature is deprecated, and may disappear from future versions of