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Handling mixing of defines within ifdef/endif.

This commit is contained in:
steve 2000-04-26 01:35:26 +00:00
parent 9ca1791b43
commit 72c8897d13
1 changed files with 16 additions and 7 deletions
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23
ivlpp/lexor.lex
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@ -19,7 +19,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: lexor.lex,v 1.17 2000/03/29 04:36:42 steve Exp $"
#ident "$Id: lexor.lex,v 1.18 2000/04/26 01:35:26 steve Exp $"
#endif
# include <stdio.h>
@ -116,14 +116,23 @@ W [ \t\b\f]+
that follows it. when the directive ends, the do_include function
performs the include operation. */
^{W}?`include { BEGIN(PPINCLUDE); }
^{W}?`include { yy_push_state(PPINCLUDE); }
<PPINCLUDE>\"[^\"]*\" { include_filename(); }
<PPINCLUDE>[ \t\b\f] { ; }
<PPINCLUDE>\n { istack->lineno += 1; BEGIN(0); do_include(); }
<PPINCLUDE><<EOF>> { istack->lineno += 1; BEGIN(0); do_include(); }
/* Catch single-line comments that share the line with an include
directive. And while I'm at it, I might as well preserve the
comment in the output stream. */
<PPINCLUDE>"//".* { ECHO; }
/* These finish the include directive (EOF or EOL) so I revert the
lexor state and execute the inclusion. */
<PPINCLUDE>\n { istack->lineno += 1; yy_pop_state(); do_include(); }
<PPINCLUDE><<EOF>> { istack->lineno += 1; yy_pop_state(); do_include(); }
/* Detect the define directive, and match the name. Match any
@ -131,7 +140,7 @@ W [ \t\b\f]+
directive and the name, go into PPDEFINE mode and prepare to
collect the defined value. */
`define{W}[a-zA-Z][a-zA-Z0-9_]*{W}? { BEGIN(PPDEFINE); def_start(); }
`define{W}[a-zA-Z][a-zA-Z0-9_]*{W}? { yy_push_state(PPDEFINE); def_start(); }
<PPDEFINE>.* { do_define(); }
@ -139,14 +148,14 @@ W [ \t\b\f]+
def_finish();
istack->lineno += 1;
fputc('\n', yyout);
BEGIN(0);
yy_pop_state();
}
<PPDEFINE><<EOF>> {
def_finish();
istack->lineno += 1;
fputc('\n', yyout);
BEGIN(0);
yy_pop_state();
}
`undef{W}[a-zA-Z][a-zA-Z0-9_]*{W}?.* { def_undefine(); }