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cpplib.c (macroexpand): If arg->raw_before or arg->raw_after...

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* cpplib.c (macroexpand): If arg->raw_before or
        arg->raw_after, remove any no-reexpansion escape at the
        beginning of the pasted token.  Correct handling of whitespace
        markers and no-reexpand markers at the end if arg->raw_after.

From-SVN: r22695
This commit is contained in:
Zack Weinberg 1998-09-30 19:27:28 +00:00 committed by Jeff Law
parent f0c76b51b4
commit aa90b11170
2 changed files with 28 additions and 11 deletions
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5
gcc/ChangeLog
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@ -6,6 +6,11 @@ Wed Sep 30 19:33:07 1998 Jeffrey A Law (law@cygnus.com)
Wed Sep 30 19:13:20 1998 Zack Weinberg <zack@rabi.phys.columbia.edu>
* cpplib.c (macroexpand): If arg->raw_before or
arg->raw_after, remove any no-reexpansion escape at the
beginning of the pasted token. Correct handling of whitespace
markers and no-reexpand markers at the end if arg->raw_after.
* toplev.c (documented_lang_options): Recognize -include,
-imacros, -iwithprefix, -iwithprefixbefore.
* cpplib.c (cpp_start_read): Process -imacros and -include

34
gcc/cpplib.c
View File

@ -2874,11 +2874,6 @@ macroexpand (pfile, hp)
while (p1 != l1 && is_space[*p1]) p1++;
while (p1 != l1 && is_idchar[*p1])
xbuf[totlen++] = *p1++;
/* Delete any no-reexpansion marker that follows
an identifier at the beginning of the argument
if the argument is concatenated with what precedes it. */
if (p1[0] == '@' && p1[1] == '-')
p1 += 2;
}
if (ap->raw_after)
{
@ -2887,21 +2882,38 @@ macroexpand (pfile, hp)
while (p1 != l1)
{
if (is_space[l1[-1]]) l1--;
else if (l1[-1] == '@')
{
U_CHAR *p2 = l1 - 1;
/* If whitespace is preceded by an odd number
of `@' signs, the last `@' was a whitespace
marker; drop it too. */
while (p2 != p1 && p2[-1] == '@') p2--;
if ((l1 - 1 - p2) & 1)
l1--;
break;
}
else if (l1[-1] == '-')
{
U_CHAR *p2 = l1 - 1;
/* If a `-' is preceded by an odd number of newlines then it
and the last newline are a no-reexpansion marker. */
while (p2 != p1 && p2[-1] == '\n') p2--;
if ((l1 - 1 - p2) & 1) {
/* If a `-' is preceded by an odd number of
`@' signs then it and the last `@' are
a no-reexpansion marker. */
while (p2 != p1 && p2[-1] == '@') p2--;
if ((l1 - 1 - p2) & 1)
l1 -= 2;
}
else break;
else
break;
}
else break;
}
}
/* Delete any no-reexpansion marker that precedes
an identifier at the beginning of the argument. */
if (p1[0] == '@' && p1[1] == '-')
p1 += 2;
bcopy (p1, xbuf + totlen, l1 - p1);
totlen += l1 - p1;
}