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cpplib: EOF in pragmas

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This patch moves the generation of PRAGMA_EOF earlier, to when we set
need_line, rather than when we try and get the next line.  It also
prevents peeking past a PRAGMA token.

	libcpp/
	* lex.c (cpp_peek_token): Do not peek past CPP_PRAGMA.
	(_cpp_lex_direct): Handle EOF in pragma when setting need_line,
	not when needing a line.
This commit is contained in:
Nathan Sidwell 2020-11-03 09:06:09 -08:00
parent 9ba95047e4
commit 8bd9a00f43
1 changed files with 23 additions and 8 deletions
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31
libcpp/lex.c
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@ -2554,6 +2554,15 @@ cpp_peek_token (cpp_reader *pfile, int index)
index--;
break;
}
else if (peektok->type == CPP_PRAGMA)
{
/* Don't peek past a pragma. */
if (peektok == &pfile->directive_result)
/* Save the pragma in the buffer. */
*pfile->cur_token++ = *peektok;
index--;
break;
}
}
while (index--);
@ -2757,14 +2766,7 @@ _cpp_lex_direct (cpp_reader *pfile)
buffer = pfile->buffer;
if (buffer->need_line)
{
if (pfile->state.in_deferred_pragma)
{
result->type = CPP_PRAGMA_EOL;
pfile->state.in_deferred_pragma = false;
if (!pfile->state.pragma_allow_expansion)
pfile->state.prevent_expansion--;
return result;
}
gcc_assert (!pfile->state.in_deferred_pragma);
if (!_cpp_get_fresh_line (pfile))
{
result->type = CPP_EOF;
@ -2829,6 +2831,19 @@ _cpp_lex_direct (cpp_reader *pfile)
&& !CPP_OPTION (pfile, traditional)))
CPP_INCREMENT_LINE (pfile, 0);
buffer->need_line = true;
if (pfile->state.in_deferred_pragma)
{
/* Produce the PRAGMA_EOL on this line. File reading
ensures there is always a \n at end of the buffer, thus
in a deferred pragma we always see CPP_PRAGMA_EOL before
any CPP_EOF. */
result->type = CPP_PRAGMA_EOL;
result->flags &= ~PREV_WHITE;
pfile->state.in_deferred_pragma = false;
if (!pfile->state.pragma_allow_expansion)
pfile->state.prevent_expansion--;
return result;
}
goto fresh_line;
case '0': case '1': case '2': case '3': case '4':